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45269 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
8f72c31f45 |
vfs-6.12.misc
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Merge tag 'vfs-6.12.misc' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs
Pull misc vfs updates from Christian Brauner:
"This contains the usual pile of misc updates:
Features:
- Add F_CREATED_QUERY fcntl() that allows userspace to query whether
a file was actually created. Often userspace wants to know whether
an O_CREATE request did actually create a file without using
O_EXCL. The current logic is that to first attempts to open the
file without O_CREAT | O_EXCL and if ENOENT is returned userspace
tries again with both flags. If that succeeds all is well. If it
now reports EEXIST it retries.
That works fairly well but some corner cases make this more
involved. If this operates on a dangling symlink the first openat()
without O_CREAT | O_EXCL will return ENOENT but the second openat()
with O_CREAT | O_EXCL will fail with EEXIST.
The reason is that openat() without O_CREAT | O_EXCL follows the
symlink while O_CREAT | O_EXCL doesn't for security reasons. So
it's not something we can really change unless we add an explicit
opt-in via O_FOLLOW which seems really ugly.
All available workarounds are really nasty (fanotify, bpf lsm etc)
so add a simple fcntl().
- Try an opportunistic lookup for O_CREAT. Today, when opening a file
we'll typically do a fast lookup, but if O_CREAT is set, the kernel
always takes the exclusive inode lock. This was likely done with
the expectation that O_CREAT means that we always expect to do the
create, but that's often not the case. Many programs set O_CREAT
even in scenarios where the file already exists (see related
F_CREATED_QUERY patch motivation above).
The series contained in the pr rearranges the pathwalk-for-open
code to also attempt a fast_lookup in certain O_CREAT cases. If a
positive dentry is found, the inode_lock can be avoided altogether
and it can stay in rcuwalk mode for the last step_into.
- Expose the 64 bit mount id via name_to_handle_at()
Now that we provide a unique 64-bit mount ID interface in statx(2),
we can now provide a race-free way for name_to_handle_at(2) to
provide a file handle and corresponding mount without needing to
worry about racing with /proc/mountinfo parsing or having to open a
file just to do statx(2).
While this is not necessary if you are using AT_EMPTY_PATH and
don't care about an extra statx(2) call, users that pass full paths
into name_to_handle_at(2) need to know which mount the file handle
comes from (to make sure they don't try to open_by_handle_at a file
handle from a different filesystem) and switching to AT_EMPTY_PATH
would require allocating a file for every name_to_handle_at(2) call
- Add a per dentry expire timeout to autofs
There are two fairly well known automounter map formats, the autofs
format and the amd format (more or less System V and Berkley).
Some time ago Linux autofs added an amd map format parser that
implemented a fair amount of the amd functionality. This was done
within the autofs infrastructure and some functionality wasn't
implemented because it either didn't make sense or required extra
kernel changes. The idea was to restrict changes to be within the
existing autofs functionality as much as possible and leave changes
with a wider scope to be considered later.
One of these changes is implementing the amd options:
1) "unmount", expire this mount according to a timeout (same as
the current autofs default).
2) "nounmount", don't expire this mount (same as setting the
autofs timeout to 0 except only for this specific mount) .
3) "utimeout=<seconds>", expire this mount using the specified
timeout (again same as setting the autofs timeout but only for
this mount)
To implement these options per-dentry expire timeouts need to be
implemented for autofs indirect mounts. This is because all map
keys (mounts) for autofs indirect mounts use an expire timeout
stored in the autofs mount super block info. structure and all
indirect mounts use the same expire timeout.
Fixes:
- Fix missing fput for FSCONFIG_SET_FD in autofs
- Use param->file for FSCONFIG_SET_FD in coda
- Delete the 'fs/netfs' proc subtreee when netfs module exits
- Make sure that struct uid_gid_map fits into a single cacheline
- Don't flush in-flight wb switches for superblocks without cgroup
writeback
- Correcting the idmapping mount example in the idmapping
documentation
- Fix a race between evice_inodes() and find_inode() and iput()
- Refine the show_inode_state() macro definition in writeback code
- Prevent dump_mapping() from accessing invalid dentry.d_name.name
- Show actual source for debugfs in /proc/mounts
- Annotate data-race of busy_poll_usecs in eventpoll
- Don't WARN for racy path_noexec check in exec code
- Handle OOM on mnt_warn_timestamp_expiry()
- Fix some spelling in the iomap design documentation
- Fix typo in procfs comment
- Fix typo in fs/namespace.c comment
Cleanups:
- Add the VFS git tree to the MAINTAINERS file
- Move FMODE_UNSIGNED_OFFSET to fop_flags freeing up another f_mode
bit in struct file bringing us to 5 free f_mode bits
- Remove the __I_DIO_WAKEUP bit from i_state flags as we can simplify
the wait mechanism
- Remove the unused path_put_init() helper
- Replace a __u32 with u32 for s_fsnotify_mask as __u32 is uapi
specific
- Replace the unsigned long i_state member with a u32 i_state member
in struct inode freeing up 4 bytes in struct inode. Instead of
using the bit based wait apis we're now using the var event apis
and using the individual bytes of the i_state member to wait on
state changes
- Explain how per-syscall AT_* flags should be allocated
- Use in_group_or_capable() helper to simplify the posix acl mode
update code
- Switch to LIST_HEAD() in fsync_buffers_list() to simplify the code
- Removed comment about d_rcu_to_refcount() as that function doesn't
exist anymore
- Add kernel documentation for lookup_fast()
- Don't re-zero evenpoll fields
- Remove outdated comment after close_fd()
- Fix imprecise wording in comment about the pipe filesystem
- Drop GFP_NOFAIL mode from alloc_page_buffers
- Missing blank line warnings and struct declaration improved in
file_table
- Annotate struct poll_list with __counted_by()
- Remove the unused read parameter in percpu-rwsem
- Remove linux/prefetch.h include from direct-io code
- Use kmemdup_array instead of kmemdup for multiple allocation in
mnt_idmapping code
- Remove unused mnt_cursor_del() declaration
Performance tweaks:
- Dodge smp_mb in break_lease and break_deleg in the common case
- Only read fops once in fops_{get,put}()
- Use RCU in ilookup()
- Elide smp_mb in iversion handling in the common case
- Drop one lock trip in evict()"
* tag 'vfs-6.12.misc' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs: (58 commits)
uidgid: make sure we fit into one cacheline
proc: Fix typo in the comment
fs/pipe: Correct imprecise wording in comment
fhandle: expose u64 mount id to name_to_handle_at(2)
uapi: explain how per-syscall AT_* flags should be allocated
fs: drop GFP_NOFAIL mode from alloc_page_buffers
writeback: Refine the show_inode_state() macro definition
fs/inode: Prevent dump_mapping() accessing invalid dentry.d_name.name
mnt_idmapping: Use kmemdup_array instead of kmemdup for multiple allocation
netfs: Delete subtree of 'fs/netfs' when netfs module exits
fs: use LIST_HEAD() to simplify code
inode: make i_state a u32
inode: port __I_LRU_ISOLATING to var event
vfs: fix race between evice_inodes() and find_inode()&iput()
inode: port __I_NEW to var event
inode: port __I_SYNC to var event
fs: reorder i_state bits
fs: add i_state helpers
MAINTAINERS: add the VFS git tree
fs: s/__u32/u32/ for s_fsnotify_mask
...
|
||
|
Linus Torvalds
|
02824a5fd1 |
Power management updates for 6.12-rc1
- Remove LATENCY_MULTIPLIER from cpufreq (Qais Yousef).
- Add support for Granite Rapids and Sierra Forest in OOB mode to the
intel_pstate cpufreq driver (Srinivas Pandruvada).
- Add basic support for CPU capacity scaling on x86 and make the
intel_pstate driver set asymmetric CPU capacity on hybrid systems
without SMT (Rafael Wysocki).
- Add missing MODULE_DESCRIPTION() macros to the powerpc cpufreq
driver (Jeff Johnson).
- Several OF related cleanups in cpufreq drivers (Rob Herring).
- Enable COMPILE_TEST for ARM drivers (Rob Herrring).
- Introduce quirks for syscon failures and use socinfo to get revision
for TI cpufreq driver (Dhruva Gole, Nishanth Menon).
- Minor cleanups in amd-pstate driver (Anastasia Belova, Dhananjay
Ugwekar).
- Minor cleanups for loongson, cpufreq-dt and powernv cpufreq drivers
(Danila Tikhonov, Huacai Chen, and Liu Jing).
- Make amd-pstate validate return of any attempt to update EPP limits,
which fixes the masking hardware problems (Mario Limonciello).
- Move the calculation of the AMD boost numerator outside of amd-pstate,
correcting acpi-cpufreq on systems with preferred cores (Mario
Limonciello).
- Harden preferred core detection in amd-pstate to avoid potential
false positives (Mario Limonciello).
- Add extra unit test coverage for mode state machine (Mario
Limonciello).
- Fix an "Uninitialized variables" issue in amd-pstste (Qianqiang Liu).
- Add Granite Rapids Xeon support to intel_idle (Artem Bityutskiy).
- Disable promotion to C1E on Jasper Lake and Elkhart Lake in
intel_idle (Kai-Heng Feng).
- Use scoped device node handling to fix missing of_node_put() and
simplify walking OF children in the riscv-sbi cpuidle driver (Krzysztof
Kozlowski).
- Remove dead code from cpuidle_enter_state() (Dhruva Gole).
- Change an error pointer to NULL to fix error handling in the
intel_rapl power capping driver (Dan Carpenter).
- Fix off by one in get_rpi() in the intel_rapl power capping
driver (Dan Carpenter).
- Add support for ArrowLake-U to the intel_rapl power capping
driver (Sumeet Pawnikar).
- Fix the energy-pkg event for AMD CPUs in the intel_rapl power capping
driver (Dhananjay Ugwekar).
- Add support for AMD family 1Ah processors to the intel_rapl power
capping driver (Dhananjay Ugwekar).
- Remove unused stub for saveable_highmem_page() and remove deprecated
macros from power management documentation (Andy Shevchenko).
- Use ysfs_emit() and sysfs_emit_at() in "show" functions in the PM
sysfs interface (Xueqin Luo).
- Update the maintainers information for the operating-points-v2-ti-cpu DT
binding (Dhruva Gole).
- Drop unnecessary of_match_ptr() from ti-opp-supply (Rob Herring).
- Add missing MODULE_DESCRIPTION() macros to devfreq governors (Jeff
Johnson).
- Use devm_clk_get_enabled() in the exynos-bus devfreq driver (Anand
Moon).
- Use of_property_present() instead of of_get_property() in the imx-bus
devfreq driver (Rob Herring).
- Update directory handling and installation process in the pm-graph
Makefile and add .gitignore to ignore sleepgraph.py artifacts to
pm-graph (Amit Vadhavana, Yo-Jung Lin).
- Make cpupower display residency value in idle-info (Aboorva
Devarajan).
- Add missing powercap_set_enabled() stub function to cpupower (John
B. Wyatt IV).
- Add SWIG support to cpupower (John B. Wyatt IV).
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Merge tag 'pm-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"By the number of new lines of code, the most visible change here is
the addition of hybrid CPU capacity scaling support to the
intel_pstate driver. Next are the amd-pstate driver changes related to
the calculation of the AMD boost numerator and preferred core
detection.
As far as new hardware support is concerned, the intel_idle driver
will now handle Granite Rapids Xeon processors natively, the
intel_rapl power capping driver will recognize family 1Ah of AMD
processors and Intel ArrowLake-U chipos, and intel_pstate will handle
Granite Rapids and Sierra Forest chips in the out-of-band (OOB) mode.
Apart from the above, there is a usual collection of assorted fixes
and code cleanups in many places and there are tooling updates.
Specifics:
- Remove LATENCY_MULTIPLIER from cpufreq (Qais Yousef)
- Add support for Granite Rapids and Sierra Forest in OOB mode to the
intel_pstate cpufreq driver (Srinivas Pandruvada)
- Add basic support for CPU capacity scaling on x86 and make the
intel_pstate driver set asymmetric CPU capacity on hybrid systems
without SMT (Rafael Wysocki)
- Add missing MODULE_DESCRIPTION() macros to the powerpc cpufreq
driver (Jeff Johnson)
- Several OF related cleanups in cpufreq drivers (Rob Herring)
- Enable COMPILE_TEST for ARM drivers (Rob Herrring)
- Introduce quirks for syscon failures and use socinfo to get
revision for TI cpufreq driver (Dhruva Gole, Nishanth Menon)
- Minor cleanups in amd-pstate driver (Anastasia Belova, Dhananjay
Ugwekar)
- Minor cleanups for loongson, cpufreq-dt and powernv cpufreq drivers
(Danila Tikhonov, Huacai Chen, and Liu Jing)
- Make amd-pstate validate return of any attempt to update EPP
limits, which fixes the masking hardware problems (Mario
Limonciello)
- Move the calculation of the AMD boost numerator outside of
amd-pstate, correcting acpi-cpufreq on systems with preferred cores
(Mario Limonciello)
- Harden preferred core detection in amd-pstate to avoid potential
false positives (Mario Limonciello)
- Add extra unit test coverage for mode state machine (Mario
Limonciello)
- Fix an "Uninitialized variables" issue in amd-pstste (Qianqiang
Liu)
- Add Granite Rapids Xeon support to intel_idle (Artem Bityutskiy)
- Disable promotion to C1E on Jasper Lake and Elkhart Lake in
intel_idle (Kai-Heng Feng)
- Use scoped device node handling to fix missing of_node_put() and
simplify walking OF children in the riscv-sbi cpuidle driver
(Krzysztof Kozlowski)
- Remove dead code from cpuidle_enter_state() (Dhruva Gole)
- Change an error pointer to NULL to fix error handling in the
intel_rapl power capping driver (Dan Carpenter)
- Fix off by one in get_rpi() in the intel_rapl power capping driver
(Dan Carpenter)
- Add support for ArrowLake-U to the intel_rapl power capping driver
(Sumeet Pawnikar)
- Fix the energy-pkg event for AMD CPUs in the intel_rapl power
capping driver (Dhananjay Ugwekar)
- Add support for AMD family 1Ah processors to the intel_rapl power
capping driver (Dhananjay Ugwekar)
- Remove unused stub for saveable_highmem_page() and remove
deprecated macros from power management documentation (Andy
Shevchenko)
- Use ysfs_emit() and sysfs_emit_at() in "show" functions in the PM
sysfs interface (Xueqin Luo)
- Update the maintainers information for the
operating-points-v2-ti-cpu DT binding (Dhruva Gole)
- Drop unnecessary of_match_ptr() from ti-opp-supply (Rob Herring)
- Add missing MODULE_DESCRIPTION() macros to devfreq governors (Jeff
Johnson)
- Use devm_clk_get_enabled() in the exynos-bus devfreq driver (Anand
Moon)
- Use of_property_present() instead of of_get_property() in the
imx-bus devfreq driver (Rob Herring)
- Update directory handling and installation process in the pm-graph
Makefile and add .gitignore to ignore sleepgraph.py artifacts to
pm-graph (Amit Vadhavana, Yo-Jung Lin)
- Make cpupower display residency value in idle-info (Aboorva
Devarajan)
- Add missing powercap_set_enabled() stub function to cpupower (John
B. Wyatt IV)
- Add SWIG support to cpupower (John B. Wyatt IV)"
* tag 'pm-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (62 commits)
cpufreq/amd-pstate-ut: Fix an "Uninitialized variables" issue
cpufreq/amd-pstate-ut: Add test case for mode switches
cpufreq/amd-pstate: Export symbols for changing modes
amd-pstate: Add missing documentation for `amd_pstate_prefcore_ranking`
cpufreq: amd-pstate: Add documentation for `amd_pstate_hw_prefcore`
cpufreq: amd-pstate: Optimize amd_pstate_update_limits()
cpufreq: amd-pstate: Merge amd_pstate_highest_perf_set() into amd_get_boost_ratio_numerator()
x86/amd: Detect preferred cores in amd_get_boost_ratio_numerator()
x86/amd: Move amd_get_highest_perf() out of amd-pstate
ACPI: CPPC: Adjust debug messages in amd_set_max_freq_ratio() to warn
ACPI: CPPC: Drop check for non zero perf ratio
x86/amd: Rename amd_get_highest_perf() to amd_get_boost_ratio_numerator()
ACPI: CPPC: Adjust return code for inline functions in !CONFIG_ACPI_CPPC_LIB
x86/amd: Move amd_get_highest_perf() from amd.c to cppc.c
PM: hibernate: Remove unused stub for saveable_highmem_page()
pm:cpupower: Add error warning when SWIG is not installed
MAINTAINERS: Add Maintainers for SWIG Python bindings
pm:cpupower: Include test_raw_pylibcpupower.py
pm:cpupower: Add SWIG bindings files for libcpupower
pm:cpupower: Add missing powercap_set_enabled() stub function
...
|
||
|
Linus Torvalds
|
114143a595 |
arm64 updates for 6.12
ACPI:
* Enable PMCG erratum workaround for HiSilicon HIP10 and 11 platforms.
* Ensure arm64-specific IORT header is covered by MAINTAINERS.
CPU Errata:
* Enable workaround for hardware access/dirty issue on Ampere-1A cores.
Memory management:
* Define PHYSMEM_END to fix a crash in the amdgpu driver.
* Avoid tripping over invalid kernel mappings on the kexec() path.
* Userspace support for the Permission Overlay Extension (POE) using
protection keys.
Perf and PMUs:
* Add support for the "fixed instruction counter" extension in the CPU
PMU architecture.
* Extend and fix the event encodings for Apple's M1 CPU PMU.
* Allow LSM hooks to decide on SPE permissions for physical profiling.
* Add support for the CMN S3 and NI-700 PMUs.
Confidential Computing:
* Add support for booting an arm64 kernel as a protected guest under
Android's "Protected KVM" (pKVM) hypervisor.
Selftests:
* Fix vector length issues in the SVE/SME sigreturn tests
* Fix build warning in the ptrace tests.
Timers:
* Add support for PR_{G,S}ET_TSC so that 'rr' can deal with
non-determinism arising from the architected counter.
Miscellaneous:
* Rework our IPI-based CPU stopping code to try NMIs if regular IPIs
don't succeed.
* Minor fixes and cleanups.
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"The highlights are support for Arm's "Permission Overlay Extension"
using memory protection keys, support for running as a protected guest
on Android as well as perf support for a bunch of new interconnect
PMUs.
Summary:
ACPI:
- Enable PMCG erratum workaround for HiSilicon HIP10 and 11
platforms.
- Ensure arm64-specific IORT header is covered by MAINTAINERS.
CPU Errata:
- Enable workaround for hardware access/dirty issue on Ampere-1A
cores.
Memory management:
- Define PHYSMEM_END to fix a crash in the amdgpu driver.
- Avoid tripping over invalid kernel mappings on the kexec() path.
- Userspace support for the Permission Overlay Extension (POE) using
protection keys.
Perf and PMUs:
- Add support for the "fixed instruction counter" extension in the
CPU PMU architecture.
- Extend and fix the event encodings for Apple's M1 CPU PMU.
- Allow LSM hooks to decide on SPE permissions for physical
profiling.
- Add support for the CMN S3 and NI-700 PMUs.
Confidential Computing:
- Add support for booting an arm64 kernel as a protected guest under
Android's "Protected KVM" (pKVM) hypervisor.
Selftests:
- Fix vector length issues in the SVE/SME sigreturn tests
- Fix build warning in the ptrace tests.
Timers:
- Add support for PR_{G,S}ET_TSC so that 'rr' can deal with
non-determinism arising from the architected counter.
Miscellaneous:
- Rework our IPI-based CPU stopping code to try NMIs if regular IPIs
don't succeed.
- Minor fixes and cleanups"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (94 commits)
perf: arm-ni: Fix an NULL vs IS_ERR() bug
arm64: hibernate: Fix warning for cast from restricted gfp_t
arm64: esr: Define ESR_ELx_EC_* constants as UL
arm64: pkeys: remove redundant WARN
perf: arm_pmuv3: Use BR_RETIRED for HW branch event if enabled
MAINTAINERS: List Arm interconnect PMUs as supported
perf: Add driver for Arm NI-700 interconnect PMU
dt-bindings/perf: Add Arm NI-700 PMU
perf/arm-cmn: Improve format attr printing
perf/arm-cmn: Clean up unnecessary NUMA_NO_NODE check
arm64/mm: use lm_alias() with addresses passed to memblock_free()
mm: arm64: document why pte is not advanced in contpte_ptep_set_access_flags()
arm64: Expose the end of the linear map in PHYSMEM_END
arm64: trans_pgd: mark PTEs entries as valid to avoid dead kexec()
arm64/mm: Delete __init region from memblock.reserved
perf/arm-cmn: Support CMN S3
dt-bindings: perf: arm-cmn: Add CMN S3
perf/arm-cmn: Refactor DTC PMU register access
perf/arm-cmn: Make cycle counts less surprising
perf/arm-cmn: Improve build-time assertion
...
|
||
|
Linus Torvalds
|
85ffc6e4ed |
This update includes the following changes:
API:
- Make self-test asynchronous.
Algorithms:
- Remove MPI functions added for SM3.
- Add allocation error checks to remaining MPI functions (introduced for SM3).
- Set default Jitter RNG OSR to 3.
Drivers:
- Add hwrng driver for Rockchip RK3568 SoC.
- Allow disabling SR-IOV VFs through sysfs in qat.
- Fix device reset bugs in hisilicon.
- Fix authenc key parsing by using generic helper in octeontx*.
Others:
- Fix xor benchmarking on parisc.
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Merge tag 'v6.12-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu"
"API:
- Make self-test asynchronous
Algorithms:
- Remove MPI functions added for SM3
- Add allocation error checks to remaining MPI functions (introduced
for SM3)
- Set default Jitter RNG OSR to 3
Drivers:
- Add hwrng driver for Rockchip RK3568 SoC
- Allow disabling SR-IOV VFs through sysfs in qat
- Fix device reset bugs in hisilicon
- Fix authenc key parsing by using generic helper in octeontx*
Others:
- Fix xor benchmarking on parisc"
* tag 'v6.12-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (96 commits)
crypto: n2 - Set err to EINVAL if snprintf fails for hmac
crypto: camm/qi - Use ERR_CAST() to return error-valued pointer
crypto: mips/crc32 - Clean up useless assignment operations
crypto: qcom-rng - rename *_of_data to *_match_data
crypto: qcom-rng - fix support for ACPI-based systems
dt-bindings: crypto: qcom,prng: document support for SA8255p
crypto: aegis128 - Fix indentation issue in crypto_aegis128_process_crypt()
crypto: octeontx* - Select CRYPTO_AUTHENC
crypto: testmgr - Hide ENOENT errors
crypto: qat - Remove trailing space after \n newline
crypto: hisilicon/sec - Remove trailing space after \n newline
crypto: algboss - Pass instance creation error up
crypto: api - Fix generic algorithm self-test races
crypto: hisilicon/qm - inject error before stopping queue
crypto: hisilicon/hpre - mask cluster timeout error
crypto: hisilicon/qm - reset device before enabling it
crypto: hisilicon/trng - modifying the order of header files
crypto: hisilicon - add a lock for the qp send operation
crypto: hisilicon - fix missed error branch
crypto: ccp - do not request interrupt on cmd completion when irqs disabled
...
|
||
|
Linus Torvalds
|
9410645520 |
Networking changes for 6.12.
The zero-copy changes are relatively significant, but regression risk should be contained. The feature needs to be used to cause trouble. The new code did trigger a PowerPC64 bug with GCC 14: https://lore.kernel.org/netdev/20240913125302.0a06b4c7@canb.auug.org.au/ a fix for which Michael will bring via his tree: https://lore.kernel.org/all/87jzffq9ge.fsf@mail.lhotse/ Unideal, not sure if you'll be willing to pull without that fix but since we caught this recently I figured we'll defer to you during the MW instead of trying to fix it cross-tree. Also it feels like we got an order of magnitude more semi-automated "refactoring" chaff than usual, I wonder if it's just us. Core & protocols ---------------- - Support Device Memory TCP, ability to zero-copy receive TCP payloads to a DMABUF region of memory while packet headers land separately in normal kernel buffers, and TCP processes then as usual. - The ability to read the PTP PHC (Physical Hardware Clock) alongside MONOTONIC_RAW timestamps with PTP_SYS_OFFSET_EXTENDED. Previously only CLOCK_REALTIME was supported. - Allow matching on all bits of IP DSCP for routing decisions. Previously we only supported on matching TOS bits in IPv4 which is a narrower interpretation of the same header field. - Increase the range of weights used for multi-path routing from 8 bits to 16 bits. - Add support for IPv6 PIO p flag in the Prefix Information Option per draft-ietf-6man-pio-pflag. - IPv6 IOAM6 support for new tunsrc encap mode for better performance. - Detect destinations which blackhole MPTCP traffic and avoid initiating MPTCP connections to them for a certain period of time, 1h by default. - Improve IPsec control path performance by removing the inexact policies list. - AF_VSOCK: add support for SIOCOUTQ ioctl. - Add enum for reasons TCP reset was sent for easier tracing. - Add SMC ringbufs usage statistics. Drivers ------- - Handle netconsole setup failures more gracefully, don't fail loading, retain the specified target as disabled. - Extend bonding's IPsec offload pass thru capabilities (ESN, stats). Filtering --------- - Add TCP_BPF_SOCK_OPS_CB_FLAGS to bpf_*sockopt() to address the case when long-lived sockets miss a chance to set additional callbacks if a sockops program was not attached early in their lifetime. - Support using BPF skb helpers in tracepoints. - Conntrack Netlink: support CTA_FILTER for flush. - Improve SCTP support in nfnetlink_queue. - Improve performance of large nftables flush transactions. Things we sprinkled into general kernel code -------------------------------------------- - selftests: support setting an "interpreter" for script files; make it easy to run as separate cases tests where one "interpreter" is fed various test descriptions (in our case packet sequences). Driver API ---------- - Extend core and ethtool APIs to support many PHYs connected to a single interface (PHY topologies). - Extend cable diagnostics to specify whether Time Domain Reflectometry (TDR) or Active Link Cable Diagnostic (ALCD) was used. - Add library for implementing MAC-PHY Ethernet drivers for SPI devices compatible with Open Alliance 10BASE-T1x MAC-PHY Serial Interface (TC6) standard. - Add helpers to the PHY framework, for PHYs following the Open Alliance standards: - 1000BaseT1 link settings - cable test and diagnostics - Support listing / dumping all allocated RSS contexts. - Add configuration for frequency Embedded SYNC in DPLL, which magically embeds sync pulses into Ethernet signaling. Device drivers -------------- - Ethernet high-speed NICs: - Broadcom (bnxt): - use better FW APIs for queue reset - support QOS and TPID settings for the SR-IOV VLAN - support dynamic MSI-X allocation - Intel (100G, ice, idpf): - ice: support PCIe subfunctions - iavf: add support for TC U32 filters on VFs - ice: support Embedded SYNC in DPLL - nVidia/Mellanox (mlx5): - support HW managed steering tables - support PCIe PTM cross timestamping - AMD/Pensando: - ionic: use page_pool to increase Rx performance - Cisco (enic): - report per-queue statistics - Ethernet virtual: - Microsoft vNIC: - mana: support configuring ring length - netvsc: enable more channels on systems with many CPUs - IBM veth: - optimize polling to improve TCP_RR performance - optimize performance of Tx handling - VirtIO net: - synchronize the operstate with the admin state to allow a lower virtio-net to propagate the link status to an upper device like macvlan - Ethernet NICs consumer, and embedded: - Add driver for Realtek automotive PCIe devices (RTL9054, RTL9068, RTL9072, RTL9075, RTL9068, RTL9071) - Add driver for Microchip LAN8650/1 10BASE-T1S MAC-PHY. - Microchip: - lan743x: use phylink - support WOL, EEE, pause, link settings - add Wake-on-LAN support for KSZ87xx family - add KSZ8895/KSZ8864 switch support - factor out FDMA code and use it in sparx5 and lan966x (including DCB support in both) - Synopsys (stmmac): - support frame preemption (configured using TC and ethtool) - support Loongson DWMAC (GMAC v3.73) - support RockChips RK3576 DWMAC - TI: - am65-cpsw: add multi queue RX support - icssg-prueth: HSR offload support - Cadence (macb): - enable software (hrtimer based) IRQ coalescing by default - Xilinx (axinet): - expose HW statistics - improve multicast filtering - relax Rx checksum offload constraints - MediaTek: - mt7530: add EN7581 support - Aspeed (ftgmac100): - report link speed and duplex - Intel: - igc: add mqprio offload - igc: report EEE configuration - RealTek (r8169): - add support for RTL8126A rev.b - Vitesse (vsc73xx): - implement FDB add/del/dump operations - Freescale (fs_enet): - use phylink - Ethernet PHYs: - vitesse: implement downshift and MDI-X in vsc73xx PHYs - microchip: support LAN887x, supporting IEEE 802.3bw (100BASE-T1) and IEEE 802.3bp (1000BASE-T1) specifications - add Applied Micro QT2025 PHY driver (in Rust) - add Motorcomm yt8821 2.5G Ethernet PHY driver - CAN: - add driver for Rockchip RK3568 CAN-FD controller - flexcan: add wakeup support for imx95 - kvaser_usb: set hardware timestamp on transmitted packets - WiFi: - mac80211/cfg80211: - EHT rate support in AQL airtime fairness - handle DFS (radar detection) per link in Multi-Link Operation - RealTek (rtw89): - support RTL8852BT and 8852BE-VT (WiFi 6) - support hardware rfkill - support HW encryption in unicast management frames - support Wake-on-WLAN with supported network detection - RealTek (rtw89): - improve Rx performance by using USB frame aggregation - support USB 3 with RTL8822CU/RTL8822BU - Intel (iwlwifi/mvm): - offload RLC/SMPS functionality to firmware - Marvell (mwifiex): - add host based MLME to enable WPA3 - Bluetooth: - add support for Amlogic HCI UART protocol - add support for ISO data/packets to Intel and NXP drivers Signed-off-by: Jakub Kicinski <kuba@kernel.org> -----BEGIN PGP SIGNATURE----- iQIyBAABCAAdFiEE6jPA+I1ugmIBA4hXMUZtbf5SIrsFAmbnFW0ACgkQMUZtbf5S IrvA8A/4yxw9SFLFZVFn2c1kRssssSUENAljnP29MaINjr74BT2B324e5V5xiCK/ yT+hr9M+mlFDZVlZYAxo7Z64X6EwmjXewaH+2/tIsZf9LFySnkNq3sCxCuZWQNtE WjVdT/t+7rS8sGQefSggchXrSqZg1Rw/oCI3cKjQl8jB/CvDs7n1ivjtNz409jHy MKvcvf4cfG/olN0SnXh8kHHmz4d1rnPOi2OmC/dNAU8ErcDgC1t7PmMAzTfJWzND Akyxe4BvMkoKjL+kzIdpaf6EoLjUENPqu9/KKseP37HtYZmE4M0ENJOJnr7FVWwP GHymKwyp+VyI3RLNPIWrMJyCOwyUg4n4N44tGDn5bC3fYi1qK7U14pTP1vSZfXsK K8D6kpkVNllTLvf2z+FbweHu6CSh87vgdt1p7aNKpkEO0jISJBDFxLAen1buayKt 9VYXclcM7ZdjDd6w/53woieYizNeV10L5917htJCh/BbQ+XM0IjDR9wiJuj3aZ1s BrmsTK/7VuKxJ4LQKFkWnqnB02/GUHDbGVQoQCUBF7uaSPcPv4FWW6ibqIUz8zq5 HyGFOIL1Lc/J4s7D3mvAEhs6AKcVd9eU29TIcgLAUFyAYvSq7Y50ZeFtZrCysv2y Uy43qagPl4jKcFlHCriD2b/vFHttppL1ijLs2bvydMQkhY9eoQ== =ZEaS -----END PGP SIGNATURE----- Merge tag 'net-next-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "The zero-copy changes are relatively significant, but regression risk should be contained. The feature needs to be used to cause trouble. Also it feels like we got an order of magnitude more semi-automated "refactoring" chaff than usual, I wonder if it's just us. Core & protocols: - Support Device Memory TCP, ability to zero-copy receive TCP payloads to a DMABUF region of memory while packet headers land separately in normal kernel buffers, and TCP processes then as usual. - The ability to read the PTP PHC (Physical Hardware Clock) alongside MONOTONIC_RAW timestamps with PTP_SYS_OFFSET_EXTENDED. Previously only CLOCK_REALTIME was supported. - Allow matching on all bits of IP DSCP for routing decisions. Previously we only supported on matching TOS bits in IPv4 which is a narrower interpretation of the same header field. - Increase the range of weights used for multi-path routing from 8 bits to 16 bits. - Add support for IPv6 PIO p flag in the Prefix Information Option per draft-ietf-6man-pio-pflag. - IPv6 IOAM6 support for new tunsrc encap mode for better performance. - Detect destinations which blackhole MPTCP traffic and avoid initiating MPTCP connections to them for a certain period of time, 1h by default. - Improve IPsec control path performance by removing the inexact policies list. - AF_VSOCK: add support for SIOCOUTQ ioctl. - Add enum for reasons TCP reset was sent for easier tracing. - Add SMC ringbufs usage statistics. Drivers: - Handle netconsole setup failures more gracefully, don't fail loading, retain the specified target as disabled. - Extend bonding's IPsec offload pass thru capabilities (ESN, stats). Filtering: - Add TCP_BPF_SOCK_OPS_CB_FLAGS to bpf_*sockopt() to address the case when long-lived sockets miss a chance to set additional callbacks if a sockops program was not attached early in their lifetime. - Support using BPF skb helpers in tracepoints. - Conntrack Netlink: support CTA_FILTER for flush. - Improve SCTP support in nfnetlink_queue. - Improve performance of large nftables flush transactions. Things we sprinkled into general kernel code: - selftests: support setting an "interpreter" for script files; make it easy to run as separate cases tests where one "interpreter" is fed various test descriptions (in our case packet sequences). Driver API: - Extend core and ethtool APIs to support many PHYs connected to a single interface (PHY topologies). - Extend cable diagnostics to specify whether Time Domain Reflectometry (TDR) or Active Link Cable Diagnostic (ALCD) was used. - Add library for implementing MAC-PHY Ethernet drivers for SPI devices compatible with Open Alliance 10BASE-T1x MAC-PHY Serial Interface (TC6) standard. - Add helpers to the PHY framework, for PHYs following the Open Alliance standards: - 1000BaseT1 link settings - cable test and diagnostics - Support listing / dumping all allocated RSS contexts. - Add configuration for frequency Embedded SYNC in DPLL, which magically embeds sync pulses into Ethernet signaling. Device drivers: - Ethernet high-speed NICs: - Broadcom (bnxt): - use better FW APIs for queue reset - support QOS and TPID settings for the SR-IOV VLAN - support dynamic MSI-X allocation - Intel (100G, ice, idpf): - ice: support PCIe subfunctions - iavf: add support for TC U32 filters on VFs - ice: support Embedded SYNC in DPLL - nVidia/Mellanox (mlx5): - support HW managed steering tables - support PCIe PTM cross timestamping - AMD/Pensando: - ionic: use page_pool to increase Rx performance - Cisco (enic): - report per-queue statistics - Ethernet virtual: - Microsoft vNIC: - mana: support configuring ring length - netvsc: enable more channels on systems with many CPUs - IBM veth: - optimize polling to improve TCP_RR performance - optimize performance of Tx handling - VirtIO net: - synchronize the operstate with the admin state to allow a lower virtio-net to propagate the link status to an upper device like macvlan - Ethernet NICs consumer, and embedded: - Add driver for Realtek automotive PCIe devices (RTL9054, RTL9068, RTL9072, RTL9075, RTL9068, RTL9071) - Add driver for Microchip LAN8650/1 10BASE-T1S MAC-PHY. - Microchip: - lan743x: use phylink - support WOL, EEE, pause, link settings - add Wake-on-LAN support for KSZ87xx family - add KSZ8895/KSZ8864 switch support - factor out FDMA code and use it in sparx5 and lan966x (including DCB support in both) - Synopsys (stmmac): - support frame preemption (configured using TC and ethtool) - support Loongson DWMAC (GMAC v3.73) - support RockChips RK3576 DWMAC - TI: - am65-cpsw: add multi queue RX support - icssg-prueth: HSR offload support - Cadence (macb): - enable software (hrtimer based) IRQ coalescing by default - Xilinx (axinet): - expose HW statistics - improve multicast filtering - relax Rx checksum offload constraints - MediaTek: - mt7530: add EN7581 support - Aspeed (ftgmac100): - report link speed and duplex - Intel: - igc: add mqprio offload - igc: report EEE configuration - RealTek (r8169): - add support for RTL8126A rev.b - Vitesse (vsc73xx): - implement FDB add/del/dump operations - Freescale (fs_enet): - use phylink - Ethernet PHYs: - vitesse: implement downshift and MDI-X in vsc73xx PHYs - microchip: support LAN887x, supporting IEEE 802.3bw (100BASE-T1) and IEEE 802.3bp (1000BASE-T1) specifications - add Applied Micro QT2025 PHY driver (in Rust) - add Motorcomm yt8821 2.5G Ethernet PHY driver - CAN: - add driver for Rockchip RK3568 CAN-FD controller - flexcan: add wakeup support for imx95 - kvaser_usb: set hardware timestamp on transmitted packets - WiFi: - mac80211/cfg80211: - EHT rate support in AQL airtime fairness - handle DFS (radar detection) per link in Multi-Link Operation - RealTek (rtw89): - support RTL8852BT and 8852BE-VT (WiFi 6) - support hardware rfkill - support HW encryption in unicast management frames - support Wake-on-WLAN with supported network detection - RealTek (rtw89): - improve Rx performance by using USB frame aggregation - support USB 3 with RTL8822CU/RTL8822BU - Intel (iwlwifi/mvm): - offload RLC/SMPS functionality to firmware - Marvell (mwifiex): - add host based MLME to enable WPA3 - Bluetooth: - add support for Amlogic HCI UART protocol - add support for ISO data/packets to Intel and NXP drivers" * tag 'net-next-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1303 commits) net/mlx5: HWS, check the correct variable in hws_send_ring_alloc_sq() netfilter: nft_socket: Fix a NULL vs IS_ERR() bug in nft_socket_cgroup_subtree_level() ice: Fix a NULL vs IS_ERR() check in probe() ice: Fix a couple NULL vs IS_ERR() bugs net: ethernet: fs_enet: Make the per clock optional net: ti: icssg-prueth: Add multicast filtering support in HSR mode net: ti: icssg-prueth: Enable HSR Tx duplication, Tx Tag and Rx Tag offload net: ti: icssg-prueth: Add support for HSR frame forward offload net: ti: icssg-prueth: Stop hardcoding def_inc net: ti: icss-iep: Move icss_iep structure net: ibm: emac: get rid of wol_irq net: ibm: emac: remove all waiting code net: ibm: emac: replace of_get_property net: ibm: emac: use netdev's phydev directly net: ibm: emac: use devm for register_netdev net: ibm: emac: remove mii_bus with devm net: ibm: emac: use devm for of_iomap net: ibm: emac: manage emac_irq with devm net: ibm: emac: use devm for alloc_etherdev octeontx2-af: debugfs: Add Channel info to RPM map ... |
||
Jakub Kicinski
|
3b7dc7000e |
bpf-next-for-netdev
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQTFp0I1jqZrAX+hPRXbK58LschIgwUCZuH9UQAKCRDbK58LschI g0/zAP99WOcCBp1M/jSTUOba230+eiol7l5RirDEA6wu7TqY2QEAuvMG0KfCCpTI I0WqStrK1QMbhwKPodJC1k+17jArKgw= =jfMU -----END PGP SIGNATURE----- Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Daniel Borkmann says: ==================== pull-request: bpf-next 2024-09-11 We've added 12 non-merge commits during the last 16 day(s) which contain a total of 20 files changed, 228 insertions(+), 30 deletions(-). There's a minor merge conflict in drivers/net/netkit.c: |
||
|
Linus Torvalds
|
5da028864f |
workqueue: Fixes for v6.11-rc7
Contains the fix for a NULL worker->pool deref bug which can be triggered when a worker is created and then destroyed immediately. -----BEGIN PGP SIGNATURE----- iIQEABYKACwWIQTfIjM1kS57o3GsC/uxYfJx3gVYGQUCZuM5ew4cdGpAa2VybmVs Lm9yZwAKCRCxYfJx3gVYGU5RAQCJ13myAx5ZhznE2fkCv8IrMP1y8BhO5eoPI6+o 0QPgWgD/TMu7hMMZkz0vVHn0euNpwTWB0lOsz1299ukC1wO/tAw= =nJ2F -----END PGP SIGNATURE----- Merge tag 'wq-for-6.11-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq Pull workqueue fix from Tejun Heo: "A fix for a NULL worker->pool deref bug which can be triggered when a worker is created and then destroyed immediately" * tag 'wq-for-6.11-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: Clear worker->pool in the worker thread context |
||
Christian Brauner
|
2077006d47
|
uidgid: make sure we fit into one cacheline
When I expanded uidgid mappings I intended for a struct uid_gid_map to
fit into a single cacheline on x86 as they tend to be pretty
performance sensitive (idmapped mounts etc). But a 4 byte hole was added
that brought it over 64 bytes. Fix that by adding the static extent
array and the extent counter into a substruct. C's type punning for
unions guarantees that we can access ->nr_extents even if the last
written to member wasn't within the same object. This is also what we
rely on in struct_group() and friends. This of course relies on
non-strict aliasing which we don't do.
99) If the member used to read the contents of a union object is not the
same as the member last used to store a value in the object, the
appropriate part of the object representation of the value is
reinterpreted as an object representation in the new type as
described in 6.2.6 (a process sometimes called "type punning").
Link: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2310.pdf
Link: https://lore.kernel.org/r/20240910-work-uid_gid_map-v1-1-e6bc761363ed@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
|
||
Lai Jiangshan
|
73613840a8 |
workqueue: Clear worker->pool in the worker thread context
Marc Hartmayer reported:
[ 23.133876] Unable to handle kernel pointer dereference in virtual kernel address space
[ 23.133950] Failing address: 0000000000000000 TEID: 0000000000000483
[ 23.133954] Fault in home space mode while using kernel ASCE.
[ 23.133957] AS:000000001b8f0007 R3:0000000056cf4007 S:0000000056cf3800 P:000000000000003d
[ 23.134207] Oops: 0004 ilc:2 [#1] SMP
(snip)
[ 23.134516] Call Trace:
[ 23.134520] [<0000024e326caf28>] worker_thread+0x48/0x430
[ 23.134525] ([<0000024e326caf18>] worker_thread+0x38/0x430)
[ 23.134528] [<0000024e326d3a3e>] kthread+0x11e/0x130
[ 23.134533] [<0000024e3264b0dc>] __ret_from_fork+0x3c/0x60
[ 23.134536] [<0000024e333fb37a>] ret_from_fork+0xa/0x38
[ 23.134552] Last Breaking-Event-Address:
[ 23.134553] [<0000024e333f4c04>] mutex_unlock+0x24/0x30
[ 23.134562] Kernel panic - not syncing: Fatal exception: panic_on_oops
With debuging and analysis, worker_thread() accesses to the nullified
worker->pool when the newly created worker is destroyed before being
waken-up, in which case worker_thread() can see the result detach_worker()
reseting worker->pool to NULL at the begining.
Move the code "worker->pool = NULL;" out from detach_worker() to fix the
problem.
worker->pool had been designed to be constant for regular workers and
changeable for rescuer. To share attaching/detaching code for regular
and rescuer workers and to avoid worker->pool being accessed inadvertently
when the worker has been detached, worker->pool is reset to NULL when
detached no matter the worker is rescuer or not.
To maintain worker->pool being reset after detached, move the code
"worker->pool = NULL;" in the worker thread context after detached.
It is either be in the regular worker thread context after PF_WQ_WORKER
is cleared or in rescuer worker thread context with wq_pool_attach_mutex
held. So it is safe to do so.
Cc: Marc Hartmayer <mhartmay@linux.ibm.com>
Link: https://lore.kernel.org/lkml/87wmjj971b.fsf@linux.ibm.com/
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Fixes:
|
||
|
Linus Torvalds
|
914413e3ee |
printk fixup for 6.11
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||
Rafael J. Wysocki
|
0a06811d66 |
Merge branches 'pm-sleep', 'pm-opp' and 'pm-tools'
Merge updates related to system sleep, operating performance points (OPP) updates, and PM tooling updates for 6.12-rc1: - Remove unused stub for saveable_highmem_page() and remove deprecated macros from power management documentation (Andy Shevchenko). - Use ysfs_emit() and sysfs_emit_at() in "show" functions in the PM sysfs interface (Xueqin Luo). - Update the maintainers information for the operating-points-v2-ti-cpu DT binding (Dhruva Gole). - Drop unnecessary of_match_ptr() from ti-opp-supply (Rob Herring). - Update directory handling and installation process in the pm-graph Makefile and add .gitignore to ignore sleepgraph.py artifacts to pm-graph (Amit Vadhavana, Yo-Jung Lin). - Make cpupower display residency value in idle-info (Aboorva Devarajan). - Add missing powercap_set_enabled() stub function to cpupower (John B. Wyatt IV). - Add SWIG support to cpupower (John B. Wyatt IV). * pm-sleep: PM: hibernate: Remove unused stub for saveable_highmem_page() Documentation: PM: Discourage use of deprecated macros PM: sleep: Use sysfs_emit() and sysfs_emit_at() in "show" functions PM: hibernate: Use sysfs_emit() and sysfs_emit_at() in "show" functions * pm-opp: dt-bindings: opp: operating-points-v2-ti-cpu: Update maintainers opp: ti: Drop unnecessary of_match_ptr() * pm-tools: pm:cpupower: Add error warning when SWIG is not installed MAINTAINERS: Add Maintainers for SWIG Python bindings pm:cpupower: Include test_raw_pylibcpupower.py pm:cpupower: Add SWIG bindings files for libcpupower pm:cpupower: Add missing powercap_set_enabled() stub function pm-graph: Update directory handling and installation process in Makefile pm-graph: Make git ignore sleepgraph.py artifacts tools/cpupower: display residency value in idle-info |
||
Philo Lu
|
8aeaed21be |
bpf: Support __nullable argument suffix for tp_btf
Pointers passed to tp_btf were trusted to be valid, but some tracepoints do take NULL pointer as input, such as trace_tcp_send_reset(). Then the invalid memory access cannot be detected by verifier. This patch fix it by add a suffix "__nullable" to the unreliable argument. The suffix is shown in btf, and PTR_MAYBE_NULL will be added to nullable arguments. Then users must check the pointer before use it. A problem here is that we use "btf_trace_##call" to search func_proto. As it is a typedef, argument names as well as the suffix are not recorded. To solve this, I use bpf_raw_event_map to find "__bpf_trace##template" from "btf_trace_##call", and then we can see the suffix. Suggested-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Philo Lu <lulie@linux.alibaba.com> Link: https://lore.kernel.org/r/20240911033719.91468-2-lulie@linux.alibaba.com Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> |
||
Daniel Xu
|
23dc986732 |
bpf, cpumap: Move xdp:xdp_cpumap_kthread tracepoint before rcv
cpumap takes RX processing out of softirq and onto a separate kthread.
Since the kthread needs to be scheduled in order to run (versus softirq
which does not), we can theoretically experience extra latency if the
system is under load and the scheduler is being unfair to us.
Moving the tracepoint to before passing the skb list up the stack allows
users to more accurately measure enqueue/dequeue latency introduced by
cpumap via xdp:xdp_cpumap_enqueue and xdp:xdp_cpumap_kthread tracepoints.
|
||
Petr Mladek
|
2c83ded8ae | Merge branch 'for-6.11-fixup' into for-linus | ||
Andy Shevchenko
|
c3565a35d9 |
PM: hibernate: Remove unused stub for saveable_highmem_page()
When saveable_highmem_page() is unused, it prevents kernel builds
with clang, `make W=1` and CONFIG_WERROR=y:
kernel/power/snapshot.c:1369:21: error: unused function 'saveable_highmem_page' [-Werror,-Wunused-function]
1369 | static inline void *saveable_highmem_page(struct zone *z, unsigned long p)
| ^~~~~~~~~~~~~~~~~~~~~
Fix this by removing unused stub.
See also commit
|
||
|
Linus Torvalds
|
8d8d276ba2 |
More tracing fixes for 6.11:
- Move declaration of interface_lock outside of CONFIG_TIMERLAT_TRACER The fix to some locking races moved the declaration of the interface_lock up in the file, but also moved it into the CONFIG_TIMERLAT_TRACER #ifdef block, breaking the build when that wasn't set. Move it further up and out of that #ifdef block. - Remove unused function run_tracer_selftest() stub When CONFIG_FTRACE_STARTUP_TEST is not set the stub function run_tracer_selftest() is not used and clang is warning about it. Remove the function stub as it is not needed. -----BEGIN PGP SIGNATURE----- iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCZt9WIRQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qj2PAPsHsAHxF4oPhXi9UmGHH+l0NcWm87U2 B5JE+73M+RaDQgD/WpdGJaQRudUwic0wu+aHXzMFae3DVd/WUjWbGnlo5gI= =pS08 -----END PGP SIGNATURE----- Merge tag 'trace-v6.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fixes from Steven Rostedt: - Move declaration of interface_lock outside of CONFIG_TIMERLAT_TRACER The fix to some locking races moved the declaration of the interface_lock up in the file, but also moved it into the CONFIG_TIMERLAT_TRACER #ifdef block, breaking the build when that wasn't set. Move it further up and out of that #ifdef block. - Remove unused function run_tracer_selftest() stub When CONFIG_FTRACE_STARTUP_TEST is not set the stub function run_tracer_selftest() is not used and clang is warning about it. Remove the function stub as it is not needed. * tag 'trace-v6.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing: Drop unused helper function to fix the build tracing/osnoise: Fix build when timerlat is not enabled |
||
|
Andy Shevchenko
|
4e378158e5 |
tracing: Drop unused helper function to fix the build
A helper function defined but not used. This, in particular,
prevents kernel builds with clang, `make W=1` and CONFIG_WERROR=y:
kernel/trace/trace.c:2229:19: error: unused function 'run_tracer_selftest' [-Werror,-Wunused-function]
2229 | static inline int run_tracer_selftest(struct tracer *type)
| ^~~~~~~~~~~~~~~~~~~
Fix this by dropping unused functions.
See also commit
|
||
Steven Rostedt
|
af17814334 |
tracing/osnoise: Fix build when timerlat is not enabled
To fix some critical section races, the interface_lock was added to a few
locations. One of those locations was above where the interface_lock was
declared, so the declaration was moved up before that usage.
Unfortunately, where it was placed was inside a CONFIG_TIMERLAT_TRACER
ifdef block. As the interface_lock is used outside that config, this broke
the build when CONFIG_OSNOISE_TRACER was enabled but
CONFIG_TIMERLAT_TRACER was not.
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: "Helena Anna" <helena.anna.dubel@intel.com>
Cc: "Luis Claudio R. Goncalves" <lgoncalv@redhat.com>
Cc: Tomas Glozar <tglozar@redhat.com>
Link: https://lore.kernel.org/20240909103231.23a289e2@gandalf.local.home
Fixes:
|
||
Yu Liao
|
3e5b2e81f1 |
printk: Export match_devname_and_update_preferred_console()
When building serial_base as a module, modpost fails with the following
error message:
ERROR: modpost: "match_devname_and_update_preferred_console"
[drivers/tty/serial/serial_base.ko] undefined!
Export the symbol to allow using it from modules.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202409071312.qlwtTOS1-lkp@intel.com/
Fixes:
|
||
|
Linus Torvalds
|
e20398877b |
- Fix perf's AUX buffer serialization
- Prevent uninitialized struct members in perf's uprobes handling -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmbdaUMACgkQEsHwGGHe VUoo5hAAkDYx/gqFiU4Zqr4EXu6mfG5qFRnSE5PMsgGYDt1gE+dY6Xugs5vYa7uh AzzqcFLw46ZbrOjXv359WBxljYMQCnFI9SbP/1pAYqtUs1X1q3bMl6iuYbHU8DkB NHaSCmcyxPBLANezxka554pg0Yqsb/ME4tnxomVH65GosgfG4dxCOpGB8S1jB9Wt g8TeXn+pEYwn50wFOTA2MTy+OtwcJZxl1cPRLhJGywY20znJrU0OAFTySdZeAfjm 3ekMau9coXErmETsiTj5+B6ornWfCvGgYMFpZxj4lkWppJEoxEovzOauUSgkxEjZ qM056212tqfTYHVC6SO70mKkRcGQBD3FEQFi7+Ugv9GVIhzML5UN9z0eIKCNvcvU dWTCaFPPG1/WwlsKXKaaCJkvt6f+rGuL2zdyZczeiiKlcyvuABSZv/9DscxmhQUh 5n2ZfigNXTnjUj0c2LxjBuXFmHrdbLnz5IGVr/9Ux0euXSBWJR+1HNoGpWTSHFWy aHioF3rgPHMvV0YVzpzb5Arz+ldUEV+ymHwtWOGuxGAtyk7SydpkbKEqZ1AYXyUX FEeRP/ryYw8FxTOvsNvpB85X24YDG/LrUgJdX7fbYeZjlm6Nd8IpU8LKdyLTmhmg YuIENCa+U6RQZd1dsRW4SqdOuackRyjH4pcQqZsg5i4nNczH+Z4= =Alrr -----END PGP SIGNATURE----- Merge tag 'perf_urgent_for_v6.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Borislav Petkov: - Fix perf's AUX buffer serialization - Prevent uninitialized struct members in perf's uprobes handling * tag 'perf_urgent_for_v6.11_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/aux: Fix AUX buffer serialization uprobes: Use kzalloc to allocate xol area |
||
|
Linus Torvalds
|
b831f83e40 |
bpf-6.11-rc7
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE+soXsSLHKoYyzcli6rmadz2vbToFAmbaYFMACgkQ6rmadz2v bTq7JBAAipwHeOL3IYproQxGy+f0W3Uik9FNlavSQ3zpJHmTJcpf0ysXkqH23g2q 26CF0R44gmGMkdbZsxbk3HLI2qRmzxmznYCDH0g7d9qwzQMhFHIiY7TW7UD/XbKx UHdHLb5PYrj+j94T1WGiQdvbZYDlpmdz5rFA9K/TBtBArqYp9mA4D/cIlTDBfFpk cjhSGVl9x/BKbiHKApxSGcR7Fh/+ux9mVdlssWQNhRfm3V2tbRSAw1i1/ydTG+4c bf/m0RSIDfPMxy1i7D0lNRbclzWVisTqNzDXHfQoRUJMuMDfsK4UZB/6gvh+2LKy D60vT8AfN5ygjJbLdFbwFGnEymjfsXWguyqfQB0d9Hj/2/EsZ01rI2ikJv9J+qKl wwZM3YeA3Q/V0mZ5wCONp2dn+s+82nga+fdvCRFz6SLkWQwgbW5BYHFF1c60V9MH Pbd9Y5VfCOEZRzR6RxbmguPrnoU1+BUwQeIAp9L73bllrzhtmh/aL/b03uw8/wUh I+peLxJ+DVp6wTudgvSMviMySWcztuz397G7TnFyG0V4nKe1+QxSaQWWw2HKvpy3 i+m98qoWqbuJqz49FpEtX6x/17gZZNA0LK648D77nrOfsGWOLTKOZUDbNWbTPw9a Gojg5obJ8P82yO9UCYQLyGsAJxJrKZv3OEmqy0mRG1hrSMsozxg= =5Quw -----END PGP SIGNATURE----- Merge tag 'bpf-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf Pull bpf fixes from Alexei Starovoitov: - Fix crash when btf_parse_base() returns an error (Martin Lau) - Fix out of bounds access in btf_name_valid_section() (Jeongjun Park) * tag 'bpf-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: selftests/bpf: Add a selftest to check for incorrect names bpf: add check for invalid name in btf_name_valid_section() bpf: Fix a crash when btf_parse_base() returns an error pointer |
||
|
Linus Torvalds
|
e4b42053b7 |
Tracing fixes for 6.11:
- Fix adding a new fgraph callback after function graph tracing has already started. If the new caller does not initialize its hash before registering the fgraph_ops, it can cause a NULL pointer dereference. Fix this by adding a new parameter to ftrace_graph_enable_direct() passing in the newly added gops directly and not rely on using the fgraph_array[], as entries in the fgraph_array[] must be initialized. Assign the new gops to the fgraph_array[] after it goes through ftrace_startup_subops() as that will properly initialize the gops->ops and initialize its hashes. - Fix a memory leak in fgraph storage memory test. If the "multiple fgraph storage on a function" boot up selftest fails in the registering of the function graph tracer, it will not free the memory it allocated for the filter. Break the loop up into two where it allocates the filters first and then registers the functions where any errors will do the appropriate clean ups. - Only clear the timerlat timers if it has an associated kthread. In the rtla tool that uses timerlat, if it was killed just as it was shutting down, the signals can free the kthread and the timer. But the closing of the timerlat files could cause the hrtimer_cancel() to be called on the already freed timer. As the kthread variable is is set to NULL when the kthreads are stopped and the timers are freed it can be used to know not to call hrtimer_cancel() on the timer if the kthread variable is NULL. - Use a cpumask to keep track of osnoise/timerlat kthreads The timerlat tracer can use user space threads for its analysis. With the killing of the rtla tool, the kernel can get confused between if it is using a user space thread to analyze or one of its own kernel threads. When this confusion happens, kthread_stop() can be called on a user space thread and bad things happen. As the kernel threads are per-cpu, a bitmask can be used to know when a kernel thread is used or when a user space thread is used. - Add missing interface_lock to osnoise/timerlat stop_kthread() The stop_kthread() function in osnoise/timerlat clears the osnoise kthread variable, and if it was a user space thread does a put_task on it. But this can race with the closing of the timerlat files that also does a put_task on the kthread, and if the race happens the task will have put_task called on it twice and oops. - Add cond_resched() to the tracing_iter_reset() loop. The latency tracers keep writing to the ring buffer without resetting when it issues a new "start" event (like interrupts being disabled). When reading the buffer with an iterator, the tracing_iter_reset() sets its pointer to that start event by walking through all the events in the buffer until it gets to the time stamp of the start event. In the case of a very large buffer, the loop that looks for the start event has been reported taking a very long time with a non preempt kernel that it can trigger a soft lock up warning. Add a cond_resched() into that loop to make sure that doesn't happen. - Use list_del_rcu() for eventfs ei->list variable It was reported that running loops of creating and deleting kprobe events could cause a crash due to the eventfs list iteration hitting a LIST_POISON variable. This is because the list is protected by SRCU but when an item is deleted from the list, it was using list_del() which poisons the "next" pointer. This is what list_del_rcu() was to prevent. -----BEGIN PGP SIGNATURE----- iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCZtohNBQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qtoNAQDQKjomYLCpLz2EqgHZ6VB81QVrHuqt cU7xuEfUJDzyyAEA/n0t6quIdjYRd6R2/KxGkP6By/805Coq4IZMTgNQmw0= =nZ7k -----END PGP SIGNATURE----- Merge tag 'trace-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fixes from Steven Rostedt: - Fix adding a new fgraph callback after function graph tracing has already started. If the new caller does not initialize its hash before registering the fgraph_ops, it can cause a NULL pointer dereference. Fix this by adding a new parameter to ftrace_graph_enable_direct() passing in the newly added gops directly and not rely on using the fgraph_array[], as entries in the fgraph_array[] must be initialized. Assign the new gops to the fgraph_array[] after it goes through ftrace_startup_subops() as that will properly initialize the gops->ops and initialize its hashes. - Fix a memory leak in fgraph storage memory test. If the "multiple fgraph storage on a function" boot up selftest fails in the registering of the function graph tracer, it will not free the memory it allocated for the filter. Break the loop up into two where it allocates the filters first and then registers the functions where any errors will do the appropriate clean ups. - Only clear the timerlat timers if it has an associated kthread. In the rtla tool that uses timerlat, if it was killed just as it was shutting down, the signals can free the kthread and the timer. But the closing of the timerlat files could cause the hrtimer_cancel() to be called on the already freed timer. As the kthread variable is is set to NULL when the kthreads are stopped and the timers are freed it can be used to know not to call hrtimer_cancel() on the timer if the kthread variable is NULL. - Use a cpumask to keep track of osnoise/timerlat kthreads The timerlat tracer can use user space threads for its analysis. With the killing of the rtla tool, the kernel can get confused between if it is using a user space thread to analyze or one of its own kernel threads. When this confusion happens, kthread_stop() can be called on a user space thread and bad things happen. As the kernel threads are per-cpu, a bitmask can be used to know when a kernel thread is used or when a user space thread is used. - Add missing interface_lock to osnoise/timerlat stop_kthread() The stop_kthread() function in osnoise/timerlat clears the osnoise kthread variable, and if it was a user space thread does a put_task on it. But this can race with the closing of the timerlat files that also does a put_task on the kthread, and if the race happens the task will have put_task called on it twice and oops. - Add cond_resched() to the tracing_iter_reset() loop. The latency tracers keep writing to the ring buffer without resetting when it issues a new "start" event (like interrupts being disabled). When reading the buffer with an iterator, the tracing_iter_reset() sets its pointer to that start event by walking through all the events in the buffer until it gets to the time stamp of the start event. In the case of a very large buffer, the loop that looks for the start event has been reported taking a very long time with a non preempt kernel that it can trigger a soft lock up warning. Add a cond_resched() into that loop to make sure that doesn't happen. - Use list_del_rcu() for eventfs ei->list variable It was reported that running loops of creating and deleting kprobe events could cause a crash due to the eventfs list iteration hitting a LIST_POISON variable. This is because the list is protected by SRCU but when an item is deleted from the list, it was using list_del() which poisons the "next" pointer. This is what list_del_rcu() was to prevent. * tag 'trace-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread() tracing/timerlat: Only clear timer if a kthread exists tracing/osnoise: Use a cpumask to know what threads are kthreads eventfs: Use list_del_rcu() for SRCU protected list variable tracing: Avoid possible softlockup in tracing_iter_reset() tracing: Fix memory leak in fgraph storage selftest tracing: fgraph: Fix to add new fgraph_ops to array after ftrace_startup_subops() |
||
|
Steven Rostedt
|
5bfbcd1ee5 |
tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread()
The timerlat interface will get and put the task that is part of the
"kthread" field of the osn_var to keep it around until all references are
released. But here's a race in the "stop_kthread()" code that will call
put_task_struct() on the kthread if it is not a kernel thread. This can
race with the releasing of the references to that task struct and the
put_task_struct() can be called twice when it should have been called just
once.
Take the interface_lock() in stop_kthread() to synchronize this change.
But to do so, the function stop_per_cpu_kthreads() needs to change the
loop from for_each_online_cpu() to for_each_possible_cpu() and remove the
cpu_read_lock(), as the interface_lock can not be taken while the cpu
locks are held. The only side effect of this change is that it may do some
extra work, as the per_cpu variables of the offline CPUs would not be set
anyway, and would simply be skipped in the loop.
Remove unneeded "return;" in stop_kthread().
Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Tomas Glozar <tglozar@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: "Luis Claudio R. Goncalves" <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20240905113359.2b934242@gandalf.local.home
Fixes:
|
||
|
Steven Rostedt
|
e6a53481da |
tracing/timerlat: Only clear timer if a kthread exists
The timerlat tracer can use user space threads to check for osnoise and
timer latency. If the program using this is killed via a SIGTERM, the
threads are shutdown one at a time and another tracing instance can start
up resetting the threads before they are fully closed. That causes the
hrtimer assigned to the kthread to be shutdown and freed twice when the
dying thread finally closes the file descriptors, causing a use-after-free
bug.
Only cancel the hrtimer if the associated thread is still around. Also add
the interface_lock around the resetting of the tlat_var->kthread.
Note, this is just a quick fix that can be backported to stable. A real
fix is to have a better synchronization between the shutdown of old
threads and the starting of new ones.
Link: https://lore.kernel.org/all/20240820130001.124768-1-tglozar@redhat.com/
Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: "Luis Claudio R. Goncalves" <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20240905085330.45985730@gandalf.local.home
Fixes:
|
||
|
Steven Rostedt
|
177e1cc2f4 |
tracing/osnoise: Use a cpumask to know what threads are kthreads
The start_kthread() and stop_thread() code was not always called with the
interface_lock held. This means that the kthread variable could be
unexpectedly changed causing the kthread_stop() to be called on it when it
should not have been, leading to:
while true; do
rtla timerlat top -u -q & PID=$!;
sleep 5;
kill -INT $PID;
sleep 0.001;
kill -TERM $PID;
wait $PID;
done
Causing the following OOPS:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 5 UID: 0 PID: 885 Comm: timerlatu/5 Not tainted 6.11.0-rc4-test-00002-gbc754cc76d1b-dirty #125 a533010b71dab205ad2f507188ce8c82203b0254
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:hrtimer_active+0x58/0x300
Code: 48 c1 ee 03 41 54 48 01 d1 48 01 d6 55 53 48 83 ec 20 80 39 00 0f 85 30 02 00 00 49 8b 6f 30 4c 8d 75 10 4c 89 f0 48 c1 e8 03 <0f> b6 3c 10 4c 89 f0 83 e0 07 83 c0 03 40 38 f8 7c 09 40 84 ff 0f
RSP: 0018:ffff88811d97f940 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff88823c6b5b28 RCX: ffffed10478d6b6b
RDX: dffffc0000000000 RSI: ffffed10478d6b6c RDI: ffff88823c6b5b28
RBP: 0000000000000000 R08: ffff88823c6b5b58 R09: ffff88823c6b5b60
R10: ffff88811d97f957 R11: 0000000000000010 R12: 00000000000a801d
R13: ffff88810d8b35d8 R14: 0000000000000010 R15: ffff88823c6b5b28
FS: 0000000000000000(0000) GS:ffff88823c680000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561858ad7258 CR3: 000000007729e001 CR4: 0000000000170ef0
Call Trace:
<TASK>
? die_addr+0x40/0xa0
? exc_general_protection+0x154/0x230
? asm_exc_general_protection+0x26/0x30
? hrtimer_active+0x58/0x300
? __pfx_mutex_lock+0x10/0x10
? __pfx_locks_remove_file+0x10/0x10
hrtimer_cancel+0x15/0x40
timerlat_fd_release+0x8e/0x1f0
? security_file_release+0x43/0x80
__fput+0x372/0xb10
task_work_run+0x11e/0x1f0
? _raw_spin_lock+0x85/0xe0
? __pfx_task_work_run+0x10/0x10
? poison_slab_object+0x109/0x170
? do_exit+0x7a0/0x24b0
do_exit+0x7bd/0x24b0
? __pfx_migrate_enable+0x10/0x10
? __pfx_do_exit+0x10/0x10
? __pfx_read_tsc+0x10/0x10
? ktime_get+0x64/0x140
? _raw_spin_lock_irq+0x86/0xe0
do_group_exit+0xb0/0x220
get_signal+0x17ba/0x1b50
? vfs_read+0x179/0xa40
? timerlat_fd_read+0x30b/0x9d0
? __pfx_get_signal+0x10/0x10
? __pfx_timerlat_fd_read+0x10/0x10
arch_do_signal_or_restart+0x8c/0x570
? __pfx_arch_do_signal_or_restart+0x10/0x10
? vfs_read+0x179/0xa40
? ksys_read+0xfe/0x1d0
? __pfx_ksys_read+0x10/0x10
syscall_exit_to_user_mode+0xbc/0x130
do_syscall_64+0x74/0x110
? __pfx___rseq_handle_notify_resume+0x10/0x10
? __pfx_ksys_read+0x10/0x10
? fpregs_restore_userregs+0xdb/0x1e0
? fpregs_restore_userregs+0xdb/0x1e0
? syscall_exit_to_user_mode+0x116/0x130
? do_syscall_64+0x74/0x110
? do_syscall_64+0x74/0x110
? do_syscall_64+0x74/0x110
entry_SYSCALL_64_after_hwframe+0x71/0x79
RIP: 0033:0x7ff0070eca9c
Code: Unable to access opcode bytes at 0x7ff0070eca72.
RSP: 002b:00007ff006dff8c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007ff0070eca9c
RDX: 0000000000000400 RSI: 00007ff006dff9a0 RDI: 0000000000000003
RBP: 00007ff006dffde0 R08: 0000000000000000 R09: 00007ff000000ba0
R10: 00007ff007004b08 R11: 0000000000000246 R12: 0000000000000003
R13: 00007ff006dff9a0 R14: 0000000000000007 R15: 0000000000000008
</TASK>
Modules linked in: snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hwdep snd_hda_core
---[ end trace 0000000000000000 ]---
This is because it would mistakenly call kthread_stop() on a user space
thread making it "exit" before it actually exits.
Since kthreads are created based on global behavior, use a cpumask to know
when kthreads are running and that they need to be shutdown before
proceeding to do new work.
Link: https://lore.kernel.org/all/20240820130001.124768-1-tglozar@redhat.com/
This was debugged by using the persistent ring buffer:
Link: https://lore.kernel.org/all/20240823013902.135036960@goodmis.org/
Note, locking was originally used to fix this, but that proved to cause too
many deadlocks to work around:
https://lore.kernel.org/linux-trace-kernel/20240823102816.5e55753b@gandalf.local.home/
Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: "Luis Claudio R. Goncalves" <lgoncalv@redhat.com>
Link: https://lore.kernel.org/20240904103428.08efdf4c@gandalf.local.home
Fixes:
|
||
Zheng Yejian
|
49aa8a1f4d |
tracing: Avoid possible softlockup in tracing_iter_reset()
In __tracing_open(), when max latency tracers took place on the cpu,
the time start of its buffer would be updated, then event entries with
timestamps being earlier than start of the buffer would be skipped
(see tracing_iter_reset()).
Softlockup will occur if the kernel is non-preemptible and too many
entries were skipped in the loop that reset every cpu buffer, so add
cond_resched() to avoid it.
Cc: stable@vger.kernel.org
Fixes:
|
||
Jeongjun Park
|
bb6705c3f9 |
bpf: add check for invalid name in btf_name_valid_section()
If the length of the name string is 1 and the value of name[0] is NULL
byte, an OOB vulnerability occurs in btf_name_valid_section() and the
return value is true, so the invalid name passes the check.
To solve this, you need to check if the first position is NULL byte and
if the first character is printable.
Suggested-by: Eduard Zingerman <eddyz87@gmail.com>
Fixes:
|
||
Peter Zijlstra
|
2ab9d83026 |
perf/aux: Fix AUX buffer serialization
Ole reported that event->mmap_mutex is strictly insufficient to
serialize the AUX buffer, add a per RB mutex to fully serialize it.
Note that in the lock order comment the perf_event::mmap_mutex order
was already wrong, that is, it nesting under mmap_lock is not new with
this patch.
Fixes:
|
||
|
Linus Torvalds
|
76c0f27d06 |
17 hotfixes, 15 of which are cc:stable.
Mostly MM, no identifiable theme. And a few nilfs2 fixups. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZtfR/wAKCRDdBJ7gKXxA jofjAP9rUlliIcn8zcy7vmBTuMaH4SkoULB64QWAUddaWV+SCAEA+q0sntLPnTIZ My3sfihR6mbvhkgKbvIHm6YYQI56NAc= =b4Lr -----END PGP SIGNATURE----- Merge tag 'mm-hotfixes-stable-2024-09-03-20-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc fixes from Andrew Morton: "17 hotfixes, 15 of which are cc:stable. Mostly MM, no identifiable theme. And a few nilfs2 fixups" * tag 'mm-hotfixes-stable-2024-09-03-20-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: alloc_tag: fix allocation tag reporting when CONFIG_MODULES=n mm: vmalloc: optimize vmap_lazy_nr arithmetic when purging each vmap_area mailmap: update entry for Jan Kuliga codetag: debug: mark codetags for poisoned page as empty mm/memcontrol: respect zswap.writeback setting from parent cg too scripts: fix gfp-translate after ___GFP_*_BITS conversion to an enum Revert "mm: skip CMA pages when they are not available" maple_tree: remove rcu_read_lock() from mt_validate() kexec_file: fix elfcorehdr digest exclusion when CONFIG_CRASH_HOTPLUG=y mm/slub: add check for s->flags in the alloc_tagging_slab_free_hook nilfs2: fix state management in error path of log writing function nilfs2: fix missing cleanup on rollforward recovery error nilfs2: protect references to superblock parameters exposed in sysfs userfaultfd: don't BUG_ON() if khugepaged yanks our page table userfaultfd: fix checks for huge PMDs mm: vmalloc: ensure vmap_block is initialised before adding to queue selftests: mm: fix build errors on armhf |
||
Sven Schnelle
|
e240b0fde5 |
uprobes: Use kzalloc to allocate xol area
To prevent unitialized members, use kzalloc to allocate
the xol area.
Fixes:
|
||
Petr Tesarik
|
6dacd79d28 |
kexec_file: fix elfcorehdr digest exclusion when CONFIG_CRASH_HOTPLUG=y
Fix the condition to exclude the elfcorehdr segment from the SHA digest
calculation.
The j iterator is an index into the output sha_regions[] array, not into
the input image->segment[] array. Once it reaches
image->elfcorehdr_index, all subsequent segments are excluded. Besides,
if the purgatory segment precedes the elfcorehdr segment, the elfcorehdr
may be wrongly included in the calculation.
Link: https://lkml.kernel.org/r/20240805150750.170739-1-petr.tesarik@suse.com
Fixes:
|
||
|
Linus Torvalds
|
c9f016e72b |
A set of X86 fixes:
- x2apic_disable() clears x2apic_state and x2apic_mode unconditionally,
even when the state is X2APIC_ON_LOCKED, which prevents the kernel to
disable it thereby creating inconsistent state.
Reorder the logic so it actually works correctly
- The XSTATE logic for handling LBR is incorrect as it assumes that
XSAVES supports LBR when the CPU supports LBR. In fact both conditions
need to be true. Otherwise the enablement of LBR in the IA32_XSS MSR
fails and subsequently the machine crashes on the next XRSTORS
operation because IA32_XSS is not initialized.
Cache the XSTATE support bit during init and make the related functions
use this cached information and the LBR CPU feature bit to cure this.
- Cure a long standing bug in KASLR
KASLR uses the full address space between PAGE_OFFSET and vaddr_end to
randomize the starting points of the direct map, vmalloc and vmemmap
regions. It thereby limits the size of the direct map by using the
installed memory size plus an extra configurable margin for hot-plug
memory. This limitation is done to gain more randomization space
because otherwise only the holes between the direct map, vmalloc,
vmemmap and vaddr_end would be usable for randomizing.
The limited direct map size is not exposed to the rest of the kernel, so
the memory hot-plug and resource management related code paths still
operate under the assumption that the available address space can be
determined with MAX_PHYSMEM_BITS.
request_free_mem_region() allocates from (1 << MAX_PHYSMEM_BITS) - 1
downwards. That means the first allocation happens past the end of the
direct map and if unlucky this address is in the vmalloc space, which
causes high_memory to become greater than VMALLOC_START and consequently
causes iounmap() to fail for valid ioremap addresses.
Cure this by exposing the end of the direct map via PHYSMEM_END and use
that for the memory hot-plug and resource management related places
instead of relying on MAX_PHYSMEM_BITS. In the KASLR case PHYSMEM_END
maps to a variable which is initialized by the KASLR initialization and
otherwise it is based on MAX_PHYSMEM_BITS as before.
- Prevent a data leak in mmio_read(). The TDVMCALL exposes the value of
an initialized variabled on the stack to the VMM. The variable is only
required as output value, so it does not have to exposed to the VMM in
the first place.
- Prevent an array overrun in the resource control code on systems with
Sub-NUMA Clustering enabled because the code failed to adjust the index
by the number of SNC nodes per L3 cache.
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Merge tag 'x86-urgent-2024-09-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
- x2apic_disable() clears x2apic_state and x2apic_mode unconditionally,
even when the state is X2APIC_ON_LOCKED, which prevents the kernel to
disable it thereby creating inconsistent state.
Reorder the logic so it actually works correctly
- The XSTATE logic for handling LBR is incorrect as it assumes that
XSAVES supports LBR when the CPU supports LBR. In fact both
conditions need to be true. Otherwise the enablement of LBR in the
IA32_XSS MSR fails and subsequently the machine crashes on the next
XRSTORS operation because IA32_XSS is not initialized.
Cache the XSTATE support bit during init and make the related
functions use this cached information and the LBR CPU feature bit to
cure this.
- Cure a long standing bug in KASLR
KASLR uses the full address space between PAGE_OFFSET and vaddr_end
to randomize the starting points of the direct map, vmalloc and
vmemmap regions. It thereby limits the size of the direct map by
using the installed memory size plus an extra configurable margin for
hot-plug memory. This limitation is done to gain more randomization
space because otherwise only the holes between the direct map,
vmalloc, vmemmap and vaddr_end would be usable for randomizing.
The limited direct map size is not exposed to the rest of the kernel,
so the memory hot-plug and resource management related code paths
still operate under the assumption that the available address space
can be determined with MAX_PHYSMEM_BITS.
request_free_mem_region() allocates from (1 << MAX_PHYSMEM_BITS) - 1
downwards. That means the first allocation happens past the end of
the direct map and if unlucky this address is in the vmalloc space,
which causes high_memory to become greater than VMALLOC_START and
consequently causes iounmap() to fail for valid ioremap addresses.
Cure this by exposing the end of the direct map via PHYSMEM_END and
use that for the memory hot-plug and resource management related
places instead of relying on MAX_PHYSMEM_BITS. In the KASLR case
PHYSMEM_END maps to a variable which is initialized by the KASLR
initialization and otherwise it is based on MAX_PHYSMEM_BITS as
before.
- Prevent a data leak in mmio_read(). The TDVMCALL exposes the value of
an initialized variabled on the stack to the VMM. The variable is
only required as output value, so it does not have to exposed to the
VMM in the first place.
- Prevent an array overrun in the resource control code on systems with
Sub-NUMA Clustering enabled because the code failed to adjust the
index by the number of SNC nodes per L3 cache.
* tag 'x86-urgent-2024-09-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/resctrl: Fix arch_mbm_* array overrun on SNC
x86/tdx: Fix data leak in mmio_read()
x86/kaslr: Expose and use the end of the physical memory address space
x86/fpu: Avoid writing LBR bit to IA32_XSS unless supported
x86/apic: Make x2apic_disable() work correctly
|
||
|
Linus Torvalds
|
51859c5aa6 |
A single fix for rt_mutex:
The deadlock detection code drops into an infinite scheduling loop while still holding rt_mutex::wait_lock, which rightfully triggers a 'scheduling in atomic' warning. Unlock it before that. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmbLKh0THHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYoSh0D/sHm7YsexyVAXRxtm1vCJ1rE+ditn/K X60QuH8EyLa2abUY9xKKKaM3YuE+4juN1dyej6uBcET8n9olqGQn0pyxukTDy3Hq Khy7OIAzYfGd7J0kJXA6DHMWAi16e4GduMcDYCw0BwYCQG4D1Ybe/lfsm0mgdcd/ aLFSD8/+oAK7bIWy9VE4wXUPT51v7iFnwajvcKsOL1c3u2StF6A0zCLbjkU5Di20 6Ko4f+B8dh3Bh9yIP/uiwHQHdVUjXp5Y9pVuFLemC8BqGVrwMi71jEEFYQva+evU UTQ8VCbhxIAcz6pqWYA3P5WeqFIQLAXq5UNJLK+63qm/Wf4eoaXNhK+Nr2fCigYu R6T+H5nx2WATATXfPORgfHYgHWwyWaj6nUPK0kaJYUTHFK5Nlg/ir5siqE/Gz9qq ldajnvKpheeuu6rsrdHdJrdI84XVOmjeAJ+5A8i7VMv2jEE50txlxXKt5jeVt2yE xm2+NABT4Dlycf/56e6OYZUEADQfX1YlvFGBQe1UYpcmOC1nTKaWWeQ1xlA3ZR92 plUgXLtRSKaZ3vEFQ3L+/1w0Af3P3/mapb+IgTxW/FEt8WAw6UuwBS9gMZDOhTI+ GZF0EFj8tUmTNDcWkNAu3m3y5Qmp3iVFYBbYXmyJdKVRJbaMu/uq51JnOOIxmaLf L6KovDUg8eF3bQ== =B3iX -----END PGP SIGNATURE----- Merge tag 'locking-urgent-2024-08-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fix from Thomas Gleixner: "A single fix for rt_mutex. The deadlock detection code drops into an infinite scheduling loop while still holding rt_mutex::wait_lock, which rightfully triggers a 'scheduling in atomic' warning. Unlock it before that" * tag 'locking-urgent-2024-08-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: rtmutex: Drop rt_mutex::wait_lock before scheduling |
||
Martin KaFai Lau
|
b408473ea0 |
bpf: Fix a crash when btf_parse_base() returns an error pointer
The pointer returned by btf_parse_base could be an error pointer.
IS_ERR() check is needed before calling btf_free(base_btf).
Fixes:
|
||
James Clark
|
5e9629d0ae |
drivers/perf: arm_spe: Use perf_allow_kernel() for permissions
Use perf_allow_kernel() for 'pa_enable' (physical addresses), 'pct_enable' (physical timestamps) and context IDs. This means that perf_event_paranoid is now taken into account and LSM hooks can be used, which is more consistent with other perf_event_open calls. For example PERF_SAMPLE_PHYS_ADDR uses perf_allow_kernel() rather than just perfmon_capable(). This also indirectly fixes the following error message which is misleading because perf_event_paranoid is not taken into account by perfmon_capable(): $ perf record -e arm_spe/pa_enable/ Error: Access to performance monitoring and observability operations is limited. Consider adjusting /proc/sys/kernel/perf_event_paranoid setting ... Suggested-by: Al Grant <al.grant@arm.com> Signed-off-by: James Clark <james.clark@linaro.org> Link: https://lore.kernel.org/r/20240827145113.1224604-1-james.clark@linaro.org Link: https://lore.kernel.org/all/20240807120039.GD37996@noisy.programming.kicks-ass.net/ Signed-off-by: Will Deacon <will@kernel.org> |
||
Kamlesh Gurudasani
|
24cc57d8fa |
padata: Honor the caller's alignment in case of chunk_size 0
In the case where we are forcing the ps.chunk_size to be at least 1,
we are ignoring the caller's alignment.
Move the forcing of ps.chunk_size to be at least 1 before rounding it
up to caller's alignment, so that caller's alignment is honored.
While at it, use max() to force the ps.chunk_size to be at least 1 to
improve readability.
Fixes:
|
||
|
Linus Torvalds
|
3e9bff3bbe |
vfs-6.11-rc6.fixes
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Merge tag 'vfs-6.11-rc6.fixes' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
"VFS:
- Ensure that backing files uses file->f_ops->splice_write() for
splice
netfs:
- Revert the removal of PG_private_2 from netfs_release_folio() as
cephfs still relies on this
- When AS_RELEASE_ALWAYS is set on a mapping the folio needs to
always be invalidated during truncation
- Fix losing untruncated data in a folio by making letting
netfs_release_folio() return false if the folio is dirty
- Fix trimming of streaming-write folios in netfs_inval_folio()
- Reset iterator before retrying a short read
- Fix interaction of streaming writes with zero-point tracker
afs:
- During truncation afs currently calls truncate_setsize() which sets
i_size, expands the pagecache and truncates it. The first two
operations aren't needed because they will have already been done.
So call truncate_pagecache() instead and skip the redundant parts
overlayfs:
- Fix checking of the number of allowed lower layers so 500 layers
can actually be used instead of just 499
- Add missing '\n' to pr_err() output
- Pass string to ovl_parse_layer() and thus allow it to be used for
Opt_lowerdir as well
pidfd:
- Revert blocking the creation of pidfds for kthread as apparently
userspace relies on this. Specifically, it breaks systemd during
shutdown
romfs:
- Fix romfs_read_folio() to use the correct offset with
folio_zero_tail()"
* tag 'vfs-6.11-rc6.fixes' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs:
netfs: Fix interaction of streaming writes with zero-point tracker
netfs: Fix missing iterator reset on retry of short read
netfs: Fix trimming of streaming-write folios in netfs_inval_folio()
netfs: Fix netfs_release_folio() to say no if folio dirty
afs: Fix post-setattr file edit to do truncation correctly
mm: Fix missing folio invalidation calls during truncation
ovl: ovl_parse_param_lowerdir: Add missed '\n' for pr_err
ovl: fix wrong lowerdir number check for parameter Opt_lowerdir
ovl: pass string to ovl_parse_layer()
backing-file: convert to using fops->splice_write
Revert "pidfd: prevent creation of pidfds for kthreads"
romfs: fix romfs_read_folio()
netfs, ceph: Partially revert "netfs: Replace PG_fscache by setting folio->private and marking dirty"
|
||
|
Linus Torvalds
|
d2bafcf224 |
cgroup: Fixes for v6.11-rc4
Three patches addressing cpuset corner cases. -----BEGIN PGP SIGNATURE----- iIQEABYKACwWIQTfIjM1kS57o3GsC/uxYfJx3gVYGQUCZskvjQ4cdGpAa2VybmVs Lm9yZwAKCRCxYfJx3gVYGTRnAQCVJj+pPLO76ofJC51p4TcITsDD37trYHPyxaCB zZ7XdAEA82NhGgy+kdlICrsiBYKK10jGDNGkXWicdCI8GmEe1Qo= =axit -----END PGP SIGNATURE----- Merge tag 'cgroup-for-6.11-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup fixes from Tejun Heo: "Three patches addressing cpuset corner cases" * tag 'cgroup-for-6.11-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup/cpuset: Eliminate unncessary sched domains rebuilds in hotplug cgroup/cpuset: Clear effective_xcpus on cpus_allowed clearing only if cpus.exclusive not set cgroup/cpuset: fix panic caused by partcmd_update |
||
|
Linus Torvalds
|
cb2c84b380 |
workqueue: Fixes for v6.11-rc4
Nothing too interesting. One patch to remove spurious warning and others to address static checker warnings. -----BEGIN PGP SIGNATURE----- iIQEABYKACwWIQTfIjM1kS57o3GsC/uxYfJx3gVYGQUCZskq8g4cdGpAa2VybmVs Lm9yZwAKCRCxYfJx3gVYGfTVAP42MsAOyrlND+cH/zQpSc8OhGbm3v0gJFnPn4UE Y3B4kgD/W68n57MQ5uWh1vHHvsqjizbXfRez1dVJoGqa/q88GQs= =Uwdx -----END PGP SIGNATURE----- Merge tag 'wq-for-6.11-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq Pull workqueue fixes from Tejun Heo: "Nothing too interesting. One patch to remove spurious warning and others to address static checker warnings" * tag 'wq-for-6.11-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: Correct declaration of cpu_pwq in struct workqueue_struct workqueue: Fix spruious data race in __flush_work() workqueue: Remove incorrect "WARN_ON_ONCE(!list_empty(&worker->entry));" from dying worker workqueue: Fix UBSAN 'subtraction overflow' error in shift_and_mask() workqueue: doc: Fix function name, remove markers |
||
|
Christian Brauner
|
232590ea7f
|
Revert "pidfd: prevent creation of pidfds for kthreads"
This reverts commit
|
||
Masami Hiramatsu (Google)
|
bc754cc76d |
tracing: Fix memory leak in fgraph storage selftest
With ftrace boot-time selftest, kmemleak reported some memory leaks in
the new test case for function graph storage for multiple tracers.
unreferenced object 0xffff888005060080 (size 32):
comm "swapper/0", pid 1, jiffies 4294676440
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 20 10 06 05 80 88 ff ff ........ .......
54 0c 1e 81 ff ff ff ff 00 00 00 00 00 00 00 00 T...............
backtrace (crc 7c93416c):
[<000000000238ee6f>] __kmalloc_cache_noprof+0x11f/0x2a0
[<0000000033d2b6c5>] enter_record+0xe8/0x150
[<0000000054c38424>] match_records+0x1cd/0x230
[<00000000c775b63d>] ftrace_set_hash+0xff/0x380
[<000000007bf7208c>] ftrace_set_filter+0x70/0x90
[<00000000a5c08dda>] test_graph_storage_multi+0x2e/0xf0
[<000000006ba028ca>] trace_selftest_startup_function_graph+0x1e8/0x260
[<00000000a715d3eb>] run_tracer_selftest+0x111/0x190
[<00000000395cbf90>] register_tracer+0xdf/0x1f0
[<0000000093e67f7b>] do_one_initcall+0x141/0x3b0
[<00000000c591b682>] do_initcall_level+0x82/0xa0
[<000000004e4c6600>] do_initcalls+0x43/0x70
[<0000000034f3c4e4>] kernel_init_freeable+0x170/0x1f0
[<00000000c7a5dab2>] kernel_init+0x1a/0x1a0
[<00000000ea105947>] ret_from_fork+0x3a/0x50
[<00000000a1932e84>] ret_from_fork_asm+0x1a/0x30
...
This means filter hash allocated for the fixtures are not correctly
released after the test.
Free those hash lists after tests are done and split the loop for
initialize fixture and register fixture for rollback.
Fixes:
|
||
|
Masami Hiramatsu (Google)
|
a069a22f39 |
tracing: fgraph: Fix to add new fgraph_ops to array after ftrace_startup_subops()
Since the register_ftrace_graph() assigns a new fgraph_ops to
fgraph_array before registring it by ftrace_startup_subops(), the new
fgraph_ops can be used in function_graph_enter().
In most cases, it is still OK because those fgraph_ops's hashtable is
already initialized by ftrace_set_filter*() etc.
But if a user registers a new fgraph_ops which does not initialize the
hash list, ftrace_ops_test() in function_graph_enter() causes a NULL
pointer dereference BUG because fgraph_ops->ops.func_hash is NULL.
This can be reproduced by the below commands because function profiler's
fgraph_ops does not initialize the hash list;
# cd /sys/kernel/tracing
# echo function_graph > current_tracer
# echo 1 > function_profile_enabled
To fix this problem, add a new fgraph_ops to fgraph_array after
ftrace_startup_subops(). Thus, until the new fgraph_ops is initialized,
we will see fgraph_stub on the corresponding fgraph_array entry.
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Florent Revest <revest@chromium.org>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: bpf <bpf@vger.kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alan Maguire <alan.maguire@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/172398528350.293426.8347220120333730248.stgit@devnote2
Fixes:
|
||
Thomas Gleixner
|
ea72ce5da2 |
x86/kaslr: Expose and use the end of the physical memory address space
iounmap() on x86 occasionally fails to unmap because the provided valid
ioremap address is not below high_memory. It turned out that this
happens due to KASLR.
KASLR uses the full address space between PAGE_OFFSET and vaddr_end to
randomize the starting points of the direct map, vmalloc and vmemmap
regions. It thereby limits the size of the direct map by using the
installed memory size plus an extra configurable margin for hot-plug
memory. This limitation is done to gain more randomization space
because otherwise only the holes between the direct map, vmalloc,
vmemmap and vaddr_end would be usable for randomizing.
The limited direct map size is not exposed to the rest of the kernel, so
the memory hot-plug and resource management related code paths still
operate under the assumption that the available address space can be
determined with MAX_PHYSMEM_BITS.
request_free_mem_region() allocates from (1 << MAX_PHYSMEM_BITS) - 1
downwards. That means the first allocation happens past the end of the
direct map and if unlucky this address is in the vmalloc space, which
causes high_memory to become greater than VMALLOC_START and consequently
causes iounmap() to fail for valid ioremap addresses.
MAX_PHYSMEM_BITS cannot be changed for that because the randomization
does not align with address bit boundaries and there are other places
which actually require to know the maximum number of address bits. All
remaining usage sites of MAX_PHYSMEM_BITS have been analyzed and found
to be correct.
Cure this by exposing the end of the direct map via PHYSMEM_END and use
that for the memory hot-plug and resource management related places
instead of relying on MAX_PHYSMEM_BITS. In the KASLR case PHYSMEM_END
maps to a variable which is initialized by the KASLR initialization and
otherwise it is based on MAX_PHYSMEM_BITS as before.
To prevent future hickups add a check into add_pages() to catch callers
trying to add memory above PHYSMEM_END.
Fixes:
|
||
|
Linus Torvalds
|
b0da640826 |
printk fixup for 6.11-rc5
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEESH4wyp42V4tXvYsjUqAMR0iAlPIFAmbDBfYACgkQUqAMR0iA lPL3ohAArEJ46nPdGWXEZ+K78biXlz/F3IXT+FH95YgtpIk0Tha6Jc5xybGerf/N 91GzWGbFweEFIIHq9i/CeBnmUEYsMocDF2hlmPiCvaqvMl1J6EuXgERUaPWqaQTS fPZab7x8MitH64hFGWbMbvt8ZDJXyQaixtkQyA0AoRPMTpiQy0mFWbFIhtN9M+Cx dov2l4N9je8X46X7SWDdKNvVEXHPnpWpq5NeMr9FW7yM4Kun3Hdb3Ks58sHS2oLm EmPFQ6kNuxpHyXNvfjeE/JdXQZvK2gGOCNS4zykpGVYJJvhmfrNSwR7iGhm0z/Zw sFObF46fK2NTkD5UZ9jQK8+uTiOwpiZSka8v55LocLa7gg2e1G7owaRSIMKjeNYT GVmcdkgLqdtfKo3D3rM+auWXlP9o+ioqM52HCewWzMXd0HC2nLx28X/66oHbif9U qJSjDPTtvlVEfIcbLr0bRX9KrYeqwtXD74zxB+msbi3Z2C/O9CrFfnGaI0h6+8cb RwAptjiO8QdbKkL06CW5RjM5ulNqtPmRETziwA01gh5h6AE5oR1PHCf0DM12ulYK /gY/rMznZ6qK0G+BYQyRhMgZh5P5KPvL77a7kxknuj4va2s6c2EsnG8u5iYcYAdo YHWN6Jad1OPfQyHsqQ7IL+zlQzTPKmuy3PHQcZwBezUPWRY96kI= =2wc2 -----END PGP SIGNATURE----- Merge tag 'printk-for-6.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux Pull printk fix from Petr Mladek: - Do not block printk on non-panic CPUs when they are dumping backtraces * tag 'printk-for-6.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk/panic: Allow cpu backtraces to be written into ringbuffer during panic |
||
|
Linus Torvalds
|
c3f2d783a4 |
16 hotfixes. All except one are for MM. 10 of these are cc:stable and
the others pertain to post-6.10 issues. As usual with these merges, singletons and doubletons all over the place, no identifiable-by-me theme. Please see the lovingly curated changelogs to get the skinny. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZsFf8wAKCRDdBJ7gKXxA jvEUAP97y/sqKD8rQNc0R8fRGSPNPamwyok8RHwohb0JEHovlAD9HsQ9Ad57EpqR wBexMxJRFc7Dt73Tu6IkLQ1iNGqABAc= =8KNp -----END PGP SIGNATURE----- Merge tag 'mm-hotfixes-stable-2024-08-17-19-34' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc fixes from Andrew Morton: "16 hotfixes. All except one are for MM. 10 of these are cc:stable and the others pertain to post-6.10 issues. As usual with these merges, singletons and doubletons all over the place, no identifiable-by-me theme. Please see the lovingly curated changelogs to get the skinny" * tag 'mm-hotfixes-stable-2024-08-17-19-34' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: mm/migrate: fix deadlock in migrate_pages_batch() on large folios alloc_tag: mark pages reserved during CMA activation as not tagged alloc_tag: introduce clear_page_tag_ref() helper function crash: fix riscv64 crash memory reserve dead loop selftests: memfd_secret: don't build memfd_secret test on unsupported arches mm: fix endless reclaim on machines with unaccepted memory selftests/mm: compaction_test: fix off by one in check_compaction() mm/numa: no task_numa_fault() call if PMD is changed mm/numa: no task_numa_fault() call if PTE is changed mm/vmalloc: fix page mapping if vm_area_alloc_pages() with high order fallback to order 0 mm/memory-failure: use raw_spinlock_t in struct memory_failure_cpu mm: don't account memmap per-node mm: add system wide stats items category mm: don't account memmap on failure mm/hugetlb: fix hugetlb vs. core-mm PT locking mseal: fix is_madv_discard() |
||
|
Linus Torvalds
|
810996a363 |
powerpc fixes for 6.11 #2
- Fix crashes on 85xx with some configs since the recent hugepd rework.
- Fix boot warning with hugepages and CONFIG_DEBUG_VIRTUAL on some platforms.
- Don't enable offline cores when changing SMT modes, to match existing
userspace behaviour.
Thanks to: Christophe Leroy, Dr. David Alan Gilbert, Guenter Roeck, Nysal Jan
K.A, Shrikanth Hegde, Thomas Gleixner, Tyrel Datwyler.
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Merge tag 'powerpc-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Fix crashes on 85xx with some configs since the recent hugepd rework.
- Fix boot warning with hugepages and CONFIG_DEBUG_VIRTUAL on some
platforms.
- Don't enable offline cores when changing SMT modes, to match existing
userspace behaviour.
Thanks to Christophe Leroy, Dr. David Alan Gilbert, Guenter Roeck, Nysal
Jan K.A, Shrikanth Hegde, Thomas Gleixner, and Tyrel Datwyler.
* tag 'powerpc-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/topology: Check if a core is online
cpu/SMT: Enable SMT only if a core is online
powerpc/mm: Fix boot warning with hugepages and CONFIG_DEBUG_VIRTUAL
powerpc/mm: Fix size of allocated PGDIR
soc: fsl: qbman: remove unused struct 'cgr_comp'
|
||
VanGiang Nguyen
|
9a22b28123 |
padata: use integer wrap around to prevent deadlock on seq_nr overflow
When submitting more than 2^32 padata objects to padata_do_serial, the
current sorting implementation incorrectly sorts padata objects with
overflowed seq_nr, causing them to be placed before existing objects in
the reorder list. This leads to a deadlock in the serialization process
as padata_find_next cannot match padata->seq_nr and pd->processed
because the padata instance with overflowed seq_nr will be selected
next.
To fix this, we use an unsigned integer wrap around to correctly sort
padata objects in scenarios with integer overflow.
Fixes:
|
||
|
Linus Torvalds
|
4a621e2910 |
A couple of fixes for tracing:
- Prevent a NULL pointer dereference in the error path of RTLA tool
- Fix an infinite loop bug when reading from the ring buffer when closed.
If there's a thread trying to read the ring buffer and it gets closed
by another thread, the one reading will go into an infinite loop
when the buffer is empty instead of exiting back to user space.
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Merge tag 'trace-v6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing fixes from Steven Rostedt:
"A couple of fixes for tracing:
- Prevent a NULL pointer dereference in the error path of RTLA tool
- Fix an infinite loop bug when reading from the ring buffer when
closed. If there's a thread trying to read the ring buffer and it
gets closed by another thread, the one reading will go into an
infinite loop when the buffer is empty instead of exiting back to
user space"
* tag 'trace-v6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
rtla/osnoise: Prevent NULL dereference in error handling
tracing: Return from tracing_buffers_read() if the file has been closed
|
||
Jinjie Ruan
|
edb907a613 |
crash: fix riscv64 crash memory reserve dead loop
On RISCV64 Qemu machine with 512MB memory, cmdline "crashkernel=500M,high"
will cause system stall as below:
Zone ranges:
DMA32 [mem 0x0000000080000000-0x000000009fffffff]
Normal empty
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000080000000-0x000000008005ffff]
node 0: [mem 0x0000000080060000-0x000000009fffffff]
Initmem setup node 0 [mem 0x0000000080000000-0x000000009fffffff]
(stall here)
commit 5d99cadf1568 ("crash: fix x86_32 crash memory reserve dead loop
bug") fix this on 32-bit architecture. However, the problem is not
completely solved. If `CRASH_ADDR_LOW_MAX = CRASH_ADDR_HIGH_MAX` on
64-bit architecture, for example, when system memory is equal to
CRASH_ADDR_LOW_MAX on RISCV64, the following infinite loop will also
occur:
-> reserve_crashkernel_generic() and high is true
-> alloc at [CRASH_ADDR_LOW_MAX, CRASH_ADDR_HIGH_MAX] fail
-> alloc at [0, CRASH_ADDR_LOW_MAX] fail and repeatedly
(because CRASH_ADDR_LOW_MAX = CRASH_ADDR_HIGH_MAX).
As Catalin suggested, do not remove the ",high" reservation fallback to
",low" logic which will change arm64's kdump behavior, but fix it by
skipping the above situation similar to commit d2f32f23190b ("crash: fix
x86_32 crash memory reserve dead loop").
After this patch, it print:
cannot allocate crashkernel (size:0x1f400000)
Link: https://lkml.kernel.org/r/20240812062017.2674441-1-ruanjinjie@huawei.com
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Dave Young <dyoung@redhat.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
||
|
Linus Torvalds
|
e724918b37 |
hardening fixes for v6.11-rc4
- gcc-plugins: randstruct: Remove GCC 4.7 or newer requirement (Thorsten Blum) - kallsyms: Clean up interaction with LTO suffixes (Song Liu) - refcount: Report UAF for refcount_sub_and_test(0) when counter==0 (Petr Pavlu) - kunit/overflow: Avoid misallocation of driver name (Ivan Orlov) -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRSPkdeREjth1dHnSE2KwveOeQkuwUCZr5D6wAKCRA2KwveOeQk u5dXAQC9ddd3iHqDAWfbCLY41/5K3KByFspVqf8hw2sFK3Uq9wD/eWU0hWFIk1gq 1hUSb7vExo+oiahYPKIUMx5Zf69hHAk= =dmVd -----END PGP SIGNATURE----- Merge tag 'hardening-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull hardening fixes from Kees Cook: - gcc-plugins: randstruct: Remove GCC 4.7 or newer requirement (Thorsten Blum) - kallsyms: Clean up interaction with LTO suffixes (Song Liu) - refcount: Report UAF for refcount_sub_and_test(0) when counter==0 (Petr Pavlu) - kunit/overflow: Avoid misallocation of driver name (Ivan Orlov) * tag 'hardening-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: kallsyms: Match symbols exactly with CONFIG_LTO_CLANG kallsyms: Do not cleanup .llvm.<hash> suffix before sorting symbols kunit/overflow: Fix UB in overflow_allocation_test gcc-plugins: randstruct: Remove GCC 4.7 or newer requirement refcount: Report UAF for refcount_sub_and_test(0) when counter==0 |