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a2f0e7eee1
40888 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
a2f0e7eee1 |
The latest perf updates in this cycle are:
- Optimize perf_sample_data layout
- Prepare sample data handling for BPF integration
- Update the x86 PMU driver for Intel Meteor Lake
- Restructure the x86 uncore code to fix a SPR (Sapphire Rapids)
discovery breakage
- Fix the x86 Zhaoxin PMU driver
- Cleanups
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-core-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
- Optimize perf_sample_data layout
- Prepare sample data handling for BPF integration
- Update the x86 PMU driver for Intel Meteor Lake
- Restructure the x86 uncore code to fix a SPR (Sapphire Rapids)
discovery breakage
- Fix the x86 Zhaoxin PMU driver
- Cleanups
* tag 'perf-core-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)
perf/x86/intel/uncore: Add Meteor Lake support
x86/perf/zhaoxin: Add stepping check for ZXC
perf/x86/intel/ds: Fix the conversion from TSC to perf time
perf/x86/uncore: Don't WARN_ON_ONCE() for a broken discovery table
perf/x86/uncore: Add a quirk for UPI on SPR
perf/x86/uncore: Ignore broken units in discovery table
perf/x86/uncore: Fix potential NULL pointer in uncore_get_alias_name
perf/x86/uncore: Factor out uncore_device_to_die()
perf/core: Call perf_prepare_sample() before running BPF
perf/core: Introduce perf_prepare_header()
perf/core: Do not pass header for sample ID init
perf/core: Set data->sample_flags in perf_prepare_sample()
perf/core: Add perf_sample_save_brstack() helper
perf/core: Add perf_sample_save_raw_data() helper
perf/core: Add perf_sample_save_callchain() helper
perf/core: Save the dynamic parts of sample data size
x86/kprobes: Use switch-case for 0xFF opcodes in prepare_emulation
perf/core: Change the layout of perf_sample_data
perf/x86/msr: Add Meteor Lake support
perf/x86/cstate: Add Meteor Lake support
...
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Linus Torvalds
|
6e649d0856 |
Updates for this cycle were:
- rwsem micro-optimizations
- spinlock micro-optimizations
- cleanups, simplifications
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-core-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
- rwsem micro-optimizations
- spinlock micro-optimizations
- cleanups, simplifications
* tag 'locking-core-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
vduse: Remove include of rwlock.h
locking/lockdep: Remove lockdep_init_map_crosslock.
x86/ACPI/boot: Use try_cmpxchg() in __acpi_{acquire,release}_global_lock()
x86/PAT: Use try_cmpxchg() in set_page_memtype()
locking/rwsem: Disable preemption in all down_write*() and up_write() code paths
locking/rwsem: Disable preemption in all down_read*() and up_read() code paths
locking/rwsem: Prevent non-first waiter from spinning in down_write() slowpath
locking/qspinlock: Micro-optimize pending state waiting for unlock
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Linus Torvalds
|
5b0ed59649 |
for-6.3/block-2023-02-16
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Merge tag 'for-6.3/block-2023-02-16' of git://git.kernel.dk/linux
Pull block updates from Jens Axboe:
- NVMe updates via Christoph:
- Small improvements to the logging functionality (Amit Engel)
- Authentication cleanups (Hannes Reinecke)
- Cleanup and optimize the DMA mapping cod in the PCIe driver
(Keith Busch)
- Work around the command effects for Format NVM (Keith Busch)
- Misc cleanups (Keith Busch, Christoph Hellwig)
- Fix and cleanup freeing single sgl (Keith Busch)
- MD updates via Song:
- Fix a rare crash during the takeover process
- Don't update recovery_cp when curr_resync is ACTIVE
- Free writes_pending in md_stop
- Change active_io to percpu
- Updates to drbd, inching us closer to unifying the out-of-tree driver
with the in-tree one (Andreas, Christoph, Lars, Robert)
- BFQ update adding support for multi-actuator drives (Paolo, Federico,
Davide)
- Make brd compliant with REQ_NOWAIT (me)
- Fix for IOPOLL and queue entering, fixing stalled IO waiting on
timeouts (me)
- Fix for REQ_NOWAIT with multiple bios (me)
- Fix memory leak in blktrace cleanup (Greg)
- Clean up sbitmap and fix a potential hang (Kemeng)
- Clean up some bits in BFQ, and fix a bug in the request injection
(Kemeng)
- Clean up the request allocation and issue code, and fix some bugs
related to that (Kemeng)
- ublk updates and fixes:
- Add support for unprivileged ublk (Ming)
- Improve device deletion handling (Ming)
- Misc (Liu, Ziyang)
- s390 dasd fixes (Alexander, Qiheng)
- Improve utility of request caching and fixes (Anuj, Xiao)
- zoned cleanups (Pankaj)
- More constification for kobjs (Thomas)
- blk-iocost cleanups (Yu)
- Remove bio splitting from drivers that don't need it (Christoph)
- Switch blk-cgroups to use struct gendisk. Some of this is now
incomplete as select late reverts were done. (Christoph)
- Add bvec initialization helpers, and convert callers to use that
rather than open-coding it (Christoph)
- Misc fixes and cleanups (Jinke, Keith, Arnd, Bart, Li, Martin,
Matthew, Ulf, Zhong)
* tag 'for-6.3/block-2023-02-16' of git://git.kernel.dk/linux: (169 commits)
brd: use radix_tree_maybe_preload instead of radix_tree_preload
block: use proper return value from bio_failfast()
block: bio-integrity: Copy flags when bio_integrity_payload is cloned
block: Fix io statistics for cgroup in throttle path
brd: mark as nowait compatible
brd: check for REQ_NOWAIT and set correct page allocation mask
brd: return 0/-error from brd_insert_page()
block: sync mixed merged request's failfast with 1st bio's
Revert "blk-cgroup: pin the gendisk in struct blkcg_gq"
Revert "blk-cgroup: pass a gendisk to blkg_lookup"
Revert "blk-cgroup: delay blk-cgroup initialization until add_disk"
Revert "blk-cgroup: delay calling blkcg_exit_disk until disk_release"
Revert "blk-cgroup: move the cgroup information to struct gendisk"
nvme-pci: remove iod use_sgls
nvme-pci: fix freeing single sgl
block: ublk: check IO buffer based on flag need_get_data
s390/dasd: Fix potential memleak in dasd_eckd_init()
s390/dasd: sort out physical vs virtual pointers usage
block: Remove the ALLOC_CACHE_SLACK constant
block: make kobj_type structures constant
...
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Linus Torvalds
|
cd776a4342 |
\n
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||
|
Linus Torvalds
|
05e6295f7b |
fs.idmapped.v6.3
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Merge tag 'fs.idmapped.v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping
Pull vfs idmapping updates from Christian Brauner:
- Last cycle we introduced the dedicated struct mnt_idmap type for
mount idmapping and the required infrastucture in
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Linus Torvalds
|
0097c18e45 |
A fix for a long standing issue in the alarmtimer code:
Posix-timers armed with a short interval with an ignored signal result in an unpriviledged DoS. Due to the ignored signal the timer switches into self rearm mode. This issue had been "fixed" before but a rework of the alarmtimer code 5 years ago lost that workaround. There is no real good solution for this issue, which is also worked around in the core posix-timer code in the same way, but it certainly moved way up on the ever growing todo list. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmPxYIwTHHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYocQ5D/45vfKxvXsF0mCHPpF+Dgx96T3rzpXY aN/OeKWJ50A7IB5QKdxR3/VdDSuD6/HroFTfKTQIUVzkzAq47r7Ref7a0bgDsNbT SLTX8oBUA1ALKVew3wGo5qkY317xyGb2WPiSCzfjAZk07MplOzDRC4YYgEfnYAWW DzmzmkZQaAhKg3JONEB+kOas/E/T1MwTSs2NNJiY0hM6ATFK2+q2b706wjDHWspk QwjCfUCbrFKSxol+hSQgvQpzV18FmS328xU4Ht4pioflch0dv1/HDrml9OGrCCzs 8hEmCcjxFwM2FXTPIix8/Jn4S8ppZwYQCi10bBjjF+0N9s897s/4dom88EbfwjfB 4YpE62SI8VZIyK0JauSuRcCAfnN7BwfgL9UpS3MEgHq4K+fnydZOItBYI3Rg4JY/ hAKizX5VzBSAq/iUFC9+DFKjonOz3cCvY5xoPLPfCXukykbYfOCz1BiBqrTP7n1z /qWgDm+YvEyYNmoEqPjD5kktpHAvwGiMl6dmJJOUxaV6KNXWremykvI491oZK7fI P3eWMPhJwJV7ukjUF6Wc5ylwupsakf+x802MF03rgmajXtzxnnFATotb/21g9SSD /FYfdjS85CRArvYKuN59Yty8iMbjX4T1tRBaKgLYjpOdqgA6H6T3vmI+ShKS/FAM T92uQTZMpVm7+w== =s5VW -----END PGP SIGNATURE----- Merge tag 'timers-urgent-2023-02-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fix from Thomas Gleixner: "A fix for a long standing issue in the alarmtimer code. Posix-timers armed with a short interval with an ignored signal result in an unpriviledged DoS. Due to the ignored signal the timer switches into self rearm mode. This issue had been "fixed" before but a rework of the alarmtimer code 5 years ago lost that workaround. There is no real good solution for this issue, which is also worked around in the core posix-timer code in the same way, but it certainly moved way up on the ever growing todo list" * tag 'timers-urgent-2023-02-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: alarmtimer: Prevent starvation by small intervals and SIG_IGN |
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Linus Torvalds
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64e0253df6 |
Misc scheduler fixes:
- Fix user-after-free bug in call_usermodehelper_exec() - Fix missing user_cpus_ptr update in __set_cpus_allowed_ptr_locked() - Fix PSI use-after-free bug in ep_remove_wait_queue() Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmPvL2ARHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1jDTA/+IgUjTKxxvXk+vWblhJcJXnFJaN0v37gE I4zk0Z4cndpZhK4ayCKyb9sqMAnNHN/aWtJCfqwcctdp35B6A8PcXlFLEE1Fd54g ZO1P3b+sXg8yV+xrh6mJTu29oLCMMfYjmZiMw/1FM0tWCStOP7ECOdp0Afgsknpi gAoN/pgzDPcnVrLZMIRzX8Z4REPOGqnmR/ILNkKk0SD5dfwE0lw0aO0cDndpkD8j P24w4WRwDb6dL0AEHkNgFgufoYXB2p82cXVg94vGuonQ2siS+8ebo7YPMx+JB35o IGrto4MoCN/hQvSY7b0kkUccG7JA0eXzFBSdqpDAsXZbkGTtMlDfn6c8XWLz4WOs ZIoeJ9hvntLJgFNb7+KekYYdQZyLd/fGWoFlk93Sy+Ex7OQHeCotKrcXYStJN/2j FdpDoTzsnAkfQDWtwu6tguzoXfV9v91e4o6xxHG+PYrbARHwGanAAXE8EZ9XwVp+ 18oPp2GDUmlvZyJo/u/X9T5qu2usMgxqxIm15P31sYfzWjb9d/DvP7QjaEyuhdaV nB71Saa8RZQviZtnf++FfgzoCMPKWn2sYYO4IUU9f6OB3Zq1t+jiGraPuMP6bApA tjardQVE0L70C2YPy1p8FzWRpiBF6YwFXP3Q99+6WDcWBM5s8WkrwDYSRUc8ontj JNqfHCsiycY= =FVI9 -----END PGP SIGNATURE----- Merge tag 'sched-urgent-2023-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes from Ingo Molnar: - Fix user-after-free bug in call_usermodehelper_exec() - Fix missing user_cpus_ptr update in __set_cpus_allowed_ptr_locked() - Fix PSI use-after-free bug in ep_remove_wait_queue() * tag 'sched-urgent-2023-02-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/psi: Fix use-after-free in ep_remove_wait_queue() sched/core: Fix a missed update of user_cpus_ptr freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL |
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Linus Torvalds
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ca5ca22775 |
tracing: Make trace_define_field_ext() static
Just after the fix to TASK_COMM_LEN not converted to its value in trace_events was pulled, the kernel test robot reported that the helper function trace_define_field_ext() added to that change was only used in the file it was defined in but was not declared static. Make it a local function. -----BEGIN PGP SIGNATURE----- iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCY+pQvhQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qpWMAP958Izvo22zPjlvqypLrC4wkwOrU6BG ITApOESLGS6YMAEA3X1qVpjgXClFmRv6j+J7S6LdhUzhkOm9Sxg5Vejxzgo= =4fmj -----END PGP SIGNATURE----- Merge tag 'trace-v6.2-rc7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fixlet from Steven Rostedt: "Make trace_define_field_ext() static. Just after the fix to TASK_COMM_LEN not converted to its value in trace_events was pulled, the kernel test robot reported that the helper function trace_define_field_ext() added to that change was only used in the file it was defined in but was not declared static. Make it a local function" * tag 'trace-v6.2-rc7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing: Make trace_define_field_ext() static |
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Munehisa Kamata
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c2dbe32d5d |
sched/psi: Fix use-after-free in ep_remove_wait_queue()
If a non-root cgroup gets removed when there is a thread that registered
trigger and is polling on a pressure file within the cgroup, the polling
waitqueue gets freed in the following path:
do_rmdir
cgroup_rmdir
kernfs_drain_open_files
cgroup_file_release
cgroup_pressure_release
psi_trigger_destroy
However, the polling thread still has a reference to the pressure file and
will access the freed waitqueue when the file is closed or upon exit:
fput
ep_eventpoll_release
ep_free
ep_remove_wait_queue
remove_wait_queue
This results in use-after-free as pasted below.
The fundamental problem here is that cgroup_file_release() (and
consequently waitqueue's lifetime) is not tied to the file's real lifetime.
Using wake_up_pollfree() here might be less than ideal, but it is in line
with the comment at commit
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Thomas Gleixner
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d125d1349a |
alarmtimer: Prevent starvation by small intervals and SIG_IGN
syzbot reported a RCU stall which is caused by setting up an alarmtimer with a very small interval and ignoring the signal. The reproducer arms the alarm timer with a relative expiry of 8ns and an interval of 9ns. Not a problem per se, but that's an issue when the signal is ignored because then the timer is immediately rearmed because there is no way to delay that rearming to the signal delivery path. See posix_timer_fn() and commit |
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Waiman Long
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df14b7f9ef |
sched/core: Fix a missed update of user_cpus_ptr
Since commit |
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Peter Zijlstra
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eedeb787eb |
freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL
Tetsuo-San noted that commit |
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Steven Rostedt (Google)
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70b5339caf |
tracing: Make trace_define_field_ext() static
trace_define_field_ext() is not used outside of trace_events.c, it should
be static.
Link: https://lore.kernel.org/oe-kbuild-all/202302130750.679RaRog-lkp@intel.com/
Fixes:
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Linus Torvalds
|
5e98e916f9 |
tracing: Fix showing of TASK_COMM_LEN instead of its value
The TASK_COMM_LEN was converted from a macro into an enum so that BTF would have access to it. But this unfortunately caused TASK_COMM_LEN to display in the format fields of trace events, as they are created by the TRACE_EVENT() macro and such, macros convert to their values, where as enums do not. To handle this, instead of using the field itself to be display, save the value of the array size as another field in the trace_event_fields structure, and use that instead. Not only does this fix the issue, but also converts the other trace events that have this same problem (but were not breaking tooling). With this change, the original work around |
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Yafang Shao
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b6c7abd1c2 |
tracing: Fix TASK_COMM_LEN in trace event format file
After commit |
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Linus Torvalds
|
338c847304 |
Fix an rtmutex missed-wakeup bug.
Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmPnV1wRHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1gWxg/8D6jl/Wl/16LkcnLk8eRWGmF34u24lGPK d8T9VN0fF0Pnz0vQVNyuhpdSARX1PvaOAyvx/gv0KE+OjeNYdXWTHavNEekpBeKA 0XFrw2xoa+M7kJE1LswARk23ynFtLZoFD05G3fNZ6NxK/uxRepZzxUyAmwYE9ibG 9gekg+IeTysaCtmIKHkCOgcLvSy41/JEJMtA3CHA3Bww/CdPd5JSc9ERqZKYCp3L lVHNtmTZotZ4TA0Dzgx+OgF1JtoQqQyerPQVhkXjmq0MnTJLjKWnvesF2gBcFLHS 6rovr3eCaO2dm7KGsFlt8Ne6FYEd1us1ifK166xoJgRV+TFFpf2UoDZkEhiCOL63 5x3S35wOuKopsBT4IHK5j2LTfhT8KTFSOsZMN41EPhvYYY5/n1EOrHSvFQKmwEFO jbVvAWHY56YGKH54qePULb+hSrAR1V+AO2ceghusg9BhT4IQ72aR0vkv4hbxd/Zh mufUd5E3+vWLOVbYM7e3ZGFiC6DA/QVZkTvVxKIllE0bzJkGKI80ITeLbjAxFFmp OCs+stGij+SwOxEWfK+I0qz6ae8mL/lgWUr7hhkAi8LXGA/t5q1jErCULZFiPr+6 vugrk2SeQZOEVvfUb0/U3GUdn01yGHak7sz7wJBsd++y8I8FR9q6fb7kawgMCo4I ZydwCwXat2I= =sfDB -----END PGP SIGNATURE----- Merge tag 'locking-urgent-2023-02-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fix from Ingo Molnar: "Fix an rtmutex missed-wakeup bug" * tag 'locking-urgent-2023-02-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: rtmutex: Ensure that the top waiter is always woken up |
||
|
Linus Torvalds
|
513c1a3d3f |
Fix regression in poll() and select()
With the fix that made poll() and select() block if read would block caused a slight regression in rasdaemon, as it needed that kind of behavior. Add a way to make that behavior come back by writing zero into the "buffer_percentage", which means to never block on read. -----BEGIN PGP SIGNATURE----- iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCY+Jn3xQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qgQ6AQC30hHcPMPm8+drlH/P6wEYstRP6xbp nHYHcvT6qXNPtAD+OhUQR2Zav66m6cE0qvkdnZb72E0YHRTfBhN5OpshTgQ= =dJEF -----END PGP SIGNATURE----- Merge tag 'trace-v6.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fix from Steven Rostedt: "Fix regression in poll() and select() With the fix that made poll() and select() block if read would block caused a slight regression in rasdaemon, as it needed that kind of behavior. Add a way to make that behavior come back by writing zero into the 'buffer_percentage', which means to never block on read" * tag 'trace-v6.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing: Fix poll() and select() do not work on per_cpu trace_pipe and trace_pipe_raw |
||
Richard Guy Briggs
|
032bffd494 |
fanotify,audit: Allow audit to use the full permission event response
This patch passes the full response so that the audit function can use all
of it. The audit function was updated to log the additional information in
the AUDIT_FANOTIFY record.
Currently the only type of fanotify info that is defined is an audit
rule number, but convert it to hex encoding to future-proof the field.
Hex encoding suggested by Paul Moore <paul@paul-moore.com>.
The {subj,obj}_trust values are {0,1,2}, corresponding to no, yes, unknown.
Sample records:
type=FANOTIFY msg=audit(1600385147.372:590): resp=2 fan_type=1 fan_info=3137 subj_trust=3 obj_trust=5
type=FANOTIFY msg=audit(1659730979.839:284): resp=1 fan_type=0 fan_info=0 subj_trust=2 obj_trust=2
Suggested-by: Steve Grubb <sgrubb@redhat.com>
Link: https://lore.kernel.org/r/3075502.aeNJFYEL58@x2
Tested-by: Steve Grubb <sgrubb@redhat.com>
Acked-by: Steve Grubb <sgrubb@redhat.com>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <bcb6d552e517b8751ece153e516d8b073459069c.1675373475.git.rgb@redhat.com>
|
||
|
Richard Guy Briggs
|
2e0a547164 |
fanotify: Ensure consistent variable type for response
The user space API for the response variable is __u32. This patch makes sure that the whole path through the kernel uses u32 so that there is no sign extension or truncation of the user space response. Suggested-by: Steve Grubb <sgrubb@redhat.com> Link: https://lore.kernel.org/r/12617626.uLZWGnKmhe@x2 Signed-off-by: Richard Guy Briggs <rgb@redhat.com> Acked-by: Paul Moore <paul@paul-moore.com> Tested-by: Steve Grubb <sgrubb@redhat.com> Acked-by: Steve Grubb <sgrubb@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Message-Id: <3778cb0b3501bc4e686ba7770b20eb9ab0506cf4.1675373475.git.rgb@redhat.com> |
||
Will Deacon
|
7a2127e66a |
cpuset: Call set_cpus_allowed_ptr() with appropriate mask for task
set_cpus_allowed_ptr() will fail with -EINVAL if the requested
affinity mask is not a subset of the task_cpu_possible_mask() for the
task being updated. Consequently, on a heterogeneous system with cpusets
spanning the different CPU types, updates to the cgroup hierarchy can
silently fail to update task affinities when the effective affinity
mask for the cpuset is expanded.
For example, consider an arm64 system with 4 CPUs, where CPUs 2-3 are
the only cores capable of executing 32-bit tasks. Attaching a 32-bit
task to a cpuset containing CPUs 0-2 will correctly affine the task to
CPU 2. Extending the cpuset to CPUs 0-3, however, will fail to extend
the affinity mask of the 32-bit task because update_tasks_cpumask() will
pass the full 0-3 mask to set_cpus_allowed_ptr().
Extend update_tasks_cpumask() to take a temporary 'cpumask' paramater
and use it to mask the 'effective_cpus' mask with the possible mask for
each task being updated.
Fixes:
|
||
|
Waiman Long
|
3fb906e7fa |
cgroup/cpuset: Don't filter offline CPUs in cpuset_cpus_allowed() for top cpuset tasks
Since commit |
||
Greg Kroah-Hartman
|
83e8864fee |
trace/blktrace: fix memory leak with using debugfs_lookup()
When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once. Cc: Jens Axboe <axboe@kernel.dk> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: linux-block@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-trace-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20230202141956.2299521-1-gregkh@linuxfoundation.org Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
Wander Lairson Costa
|
db370a8b9f |
rtmutex: Ensure that the top waiter is always woken up
Let L1 and L2 be two spinlocks.
Let T1 be a task holding L1 and blocked on L2. T1, currently, is the top
waiter of L2.
Let T2 be the task holding L2.
Let T3 be a task trying to acquire L1.
The following events will lead to a state in which the wait queue of L2
isn't empty, but no task actually holds the lock.
T1 T2 T3
== == ==
spin_lock(L1)
| raw_spin_lock(L1->wait_lock)
| rtlock_slowlock_locked(L1)
| | task_blocks_on_rt_mutex(L1, T3)
| | | orig_waiter->lock = L1
| | | orig_waiter->task = T3
| | | raw_spin_unlock(L1->wait_lock)
| | | rt_mutex_adjust_prio_chain(T1, L1, L2, orig_waiter, T3)
spin_unlock(L2) | | | |
| rt_mutex_slowunlock(L2) | | | |
| | raw_spin_lock(L2->wait_lock) | | | |
| | wakeup(T1) | | | |
| | raw_spin_unlock(L2->wait_lock) | | | |
| | | | waiter = T1->pi_blocked_on
| | | | waiter == rt_mutex_top_waiter(L2)
| | | | waiter->task == T1
| | | | raw_spin_lock(L2->wait_lock)
| | | | dequeue(L2, waiter)
| | | | update_prio(waiter, T1)
| | | | enqueue(L2, waiter)
| | | | waiter != rt_mutex_top_waiter(L2)
| | | | L2->owner == NULL
| | | | wakeup(T1)
| | | | raw_spin_unlock(L2->wait_lock)
T1 wakes up
T1 != top_waiter(L2)
schedule_rtlock()
If the deadline of T1 is updated before the call to update_prio(), and the
new deadline is greater than the deadline of the second top waiter, then
after the requeue, T1 is no longer the top waiter, and the wrong task is
woken up which will then go back to sleep because it is not the top waiter.
This can be reproduced in PREEMPT_RT with stress-ng:
while true; do
stress-ng --sched deadline --sched-period 1000000000 \
--sched-runtime 800000000 --sched-deadline \
1000000000 --mmapfork 23 -t 20
done
A similar issue was pointed out by Thomas versus the cases where the top
waiter drops out early due to a signal or timeout, which is a general issue
for all regular rtmutex use cases, e.g. futex.
The problematic code is in rt_mutex_adjust_prio_chain():
// Save the top waiter before dequeue/enqueue
prerequeue_top_waiter = rt_mutex_top_waiter(lock);
rt_mutex_dequeue(lock, waiter);
waiter_update_prio(waiter, task);
rt_mutex_enqueue(lock, waiter);
// Lock has no owner?
if (!rt_mutex_owner(lock)) {
// Top waiter changed
----> if (prerequeue_top_waiter != rt_mutex_top_waiter(lock))
----> wake_up_state(waiter->task, waiter->wake_state);
This only takes the case into account where @waiter is the new top waiter
due to the requeue operation.
But it fails to handle the case where @waiter is not longer the top
waiter due to the requeue operation.
Ensure that the new top waiter is woken up so in all cases so it can take
over the ownerless lock.
[ tglx: Amend changelog, add Fixes tag ]
Fixes:
|
||
|
Linus Torvalds
|
d3feaff4d9 |
Char/Misc driver fixes for 6.2-rc7
Here are a number of small char/misc/whatever driver fixes for 6.2-rc7.
They include:
- IIO driver fixes for some reported problems
- nvmem driver fixes
- fpga driver fixes
- debugfs memory leak fix in the hv_balloon and irqdomain code
(irqdomain change was acked by the maintainer.)
All have been in linux-next with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are a number of small char/misc/whatever driver fixes. They
include:
- IIO driver fixes for some reported problems
- nvmem driver fixes
- fpga driver fixes
- debugfs memory leak fix in the hv_balloon and irqdomain code
(irqdomain change was acked by the maintainer)
All have been in linux-next with no reported problems"
* tag 'char-misc-6.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (33 commits)
kernel/irq/irqdomain.c: fix memory leak with using debugfs_lookup()
HV: hv_balloon: fix memory leak with using debugfs_lookup()
nvmem: qcom-spmi-sdam: fix module autoloading
nvmem: core: fix return value
nvmem: core: fix cell removal on error
nvmem: core: fix device node refcounting
nvmem: core: fix registration vs use race
nvmem: core: fix cleanup after dev_set_name()
nvmem: core: remove nvmem_config wp_gpio
nvmem: core: initialise nvmem->id early
nvmem: sunxi_sid: Always use 32-bit MMIO reads
nvmem: brcm_nvram: Add check for kzalloc
iio: imu: fxos8700: fix MAGN sensor scale and unit
iio: imu: fxos8700: remove definition FXOS8700_CTRL_ODR_MIN
iio: imu: fxos8700: fix failed initialization ODR mode assignment
iio: imu: fxos8700: fix incorrect ODR mode readback
iio: light: cm32181: Fix PM support on system with 2 I2C resources
iio: hid: fix the retval in gyro_3d_capture_sample
iio: hid: fix the retval in accel_3d_capture_sample
iio: imu: st_lsm6dsx: fix build when CONFIG_IIO_TRIGGERED_BUFFER=m
...
|
||
|
Linus Torvalds
|
de506eec89 |
- Lock the proper critical section when dealing with perf event context
-----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmPfdlAACgkQEsHwGGHe VUrG1BAAvbH5AHHgjiF2WkfPpJ7v4/GhYerks/YTq3uKgnAtCOnsDBS18oRVj63A iDy6VzZUOQ3NcarJoz+eGLjSnLQ4xZY9qm42uHVGKol1Nz9Weu2loIOOSUsINe7S 6qNE6HASM4GHUGJ1uuMxnOt0I0o8d01Eo9ZPd6ieAsmsGc4GLNOgC+h8eKDDlvOz gSTWzQUF29DSIY2JVyZ9lc5pIZ6E+gHnjIUjPdwAbYSgMpjGekNFn/OTkB4ly5G4 ehoXUudTHG/fXQ0fKXmQt4aGbJaplVxf86f/9hpuCaHP8/48Zq/eNf5udNrlhzVU HAkpZcWomtGIeu+y5dyXsh1jm3tQOc5MCSV/LI7+pVl/5jMMn48lyL7HT8K2gJzd XNFrO1KxE0Sk3d1CZKgBXjLSaV5ey8uphlpAEQpbv7zbEYlInpo+SGvUmapCkyYp JFNDK7cCmP1vSaS4DkYbK3YxiGfWgbN/o7tRAFO8yHRl/yjsjNqz0BESpM8AsDz6 UbrluPbjfbkV4HYXEXHlKg+qfgUX4qaTHNNk1m2JUVkRvVgwF5aFEBrZ6IVtNT9S 8KXrOfjXruRSWtcJP9pIeMN/d4Uq7ldkcRHu/yyHHTJqifYk8z8jT/kGs2AQqecO Thh7Iruu3b6HUz2nLRmdeBIRsZn6oAqI+vNLs42l7og2BjQ4QU0= =Yway -----END PGP SIGNATURE----- Merge tag 'perf_urgent_for_v6.2_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fix from Borislav Petkov: - Lock the proper critical section when dealing with perf event context * tag 'perf_urgent_for_v6.2_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf: Fix perf_event_pmu_context serialization |
||
Christoph Hellwig
|
f05837ed73 |
blk-cgroup: store a gendisk to throttle in struct task_struct
Switch from a request_queue pointer and reference to a gendisk once for the throttle information in struct task_struct. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Andreas Herrmann <aherrmann@suse.de> Link: https://lore.kernel.org/r/20230203150400.3199230-8-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
|
Greg Kroah-Hartman
|
d83d7ed260 |
kernel/irq/irqdomain.c: fix memory leak with using debugfs_lookup()
When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: stable <stable@kernel.org> Reviewed-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230202151554.2310273-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|
Linus Torvalds
|
edb9b8f380 |
Including fixes from bpf, can and netfilter.
Current release - regressions:
- phy: fix null-deref in phy_attach_direct
- mac802154: fix possible double free upon parsing error
Previous releases - regressions:
- bpf: preserve reg parent/live fields when copying range info,
prevent mis-verification of programs as safe
- ip6: fix GRE tunnels not generating IPv6 link local addresses
- phy: dp83822: fix null-deref on DP83825/DP83826 devices
- sctp: do not check hb_timer.expires when resetting hb_timer
- eth: mtk_sock: fix SGMII configuration after phylink conversion
Previous releases - always broken:
- eth: xdp: execute xdp_do_flush() before napi_complete_done()
- skb: do not mix page pool and page referenced frags in GRO
- bpf:
- fix a possible task gone issue with bpf_send_signal[_thread]()
- fix an off-by-one bug in bpf_mem_cache_idx() to select
the right cache
- add missing btf_put to register_btf_id_dtor_kfuncs
- sockmap: fon't let sock_map_{close,destroy,unhash} call itself
- gso: fix null-deref in skb_segment_list()
- mctp: purge receive queues on sk destruction
- fix UaF caused by accept on already connected socket in exotic
socket families
- tls: don't treat list head as an entry in tls_is_tx_ready()
- netfilter: br_netfilter: disable sabotage_in hook after first
suppression
- wwan: t7xx: fix runtime PM implementation
Misc:
- MAINTAINERS: spring cleanup of networking maintainers
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-6.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from bpf, can and netfilter.
Current release - regressions:
- phy: fix null-deref in phy_attach_direct
- mac802154: fix possible double free upon parsing error
Previous releases - regressions:
- bpf: preserve reg parent/live fields when copying range info,
prevent mis-verification of programs as safe
- ip6: fix GRE tunnels not generating IPv6 link local addresses
- phy: dp83822: fix null-deref on DP83825/DP83826 devices
- sctp: do not check hb_timer.expires when resetting hb_timer
- eth: mtk_sock: fix SGMII configuration after phylink conversion
Previous releases - always broken:
- eth: xdp: execute xdp_do_flush() before napi_complete_done()
- skb: do not mix page pool and page referenced frags in GRO
- bpf:
- fix a possible task gone issue with bpf_send_signal[_thread]()
- fix an off-by-one bug in bpf_mem_cache_idx() to select the right
cache
- add missing btf_put to register_btf_id_dtor_kfuncs
- sockmap: fon't let sock_map_{close,destroy,unhash} call itself
- gso: fix null-deref in skb_segment_list()
- mctp: purge receive queues on sk destruction
- fix UaF caused by accept on already connected socket in exotic
socket families
- tls: don't treat list head as an entry in tls_is_tx_ready()
- netfilter: br_netfilter: disable sabotage_in hook after first
suppression
- wwan: t7xx: fix runtime PM implementation
Misc:
- MAINTAINERS: spring cleanup of networking maintainers"
* tag 'net-6.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (65 commits)
mtk_sgmii: enable PCS polling to allow SFP work
net: mediatek: sgmii: fix duplex configuration
net: mediatek: sgmii: ensure the SGMII PHY is powered down on configuration
MAINTAINERS: update SCTP maintainers
MAINTAINERS: ipv6: retire Hideaki Yoshifuji
mailmap: add John Crispin's entry
MAINTAINERS: bonding: move Veaceslav Falico to CREDITS
net: openvswitch: fix flow memory leak in ovs_flow_cmd_new
net: ethernet: mtk_eth_soc: disable hardware DSA untagging for second MAC
virtio-net: Keep stop() to follow mirror sequence of open()
selftests: net: udpgso_bench_tx: Cater for pending datagrams zerocopy benchmarking
selftests: net: udpgso_bench: Fix racing bug between the rx/tx programs
selftests: net: udpgso_bench_rx/tx: Stop when wrong CLI args are provided
selftests: net: udpgso_bench_rx: Fix 'used uninitialized' compiler warning
can: mcp251xfd: mcp251xfd_ring_set_ringparam(): assign missing tx_obj_num_coalesce_irq
can: isotp: split tx timer into transmission and timeout
can: isotp: handle wait_event_interruptible() return values
can: raw: fix CAN FD frame transmissions over CAN XL devices
can: j1939: fix errant WARN_ON_ONCE in j1939_session_deactivate
hv_netvsc: Fix missed pagebuf entries in netvsc_dma_map/unmap()
...
|
||
Shiju Jose
|
3e46d910d8 |
tracing: Fix poll() and select() do not work on per_cpu trace_pipe and trace_pipe_raw
poll() and select() on per_cpu trace_pipe and trace_pipe_raw do not work since kernel 6.1-rc6. This issue is seen after the commit |
||
|
Waiman Long
|
e5ae880384 |
cgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask()
It was found that the check to see if a partition could use up all
the cpus from the parent cpuset in update_parent_subparts_cpumask()
was incorrect. As a result, it is possible to leave parent with no
effective cpu left even if there are tasks in the parent cpuset. This
can lead to system panic as reported in [1].
Fix this probem by updating the check to fail the enabling the partition
if parent's effective_cpus is a subset of the child's cpus_allowed.
Also record the error code when an error happens in update_prstate()
and add a test case where parent partition and child have the same cpu
list and parent has task. Enabling partition in the child will fail in
this case.
[1] https://www.spinics.net/lists/cgroups/msg36254.html
Fixes:
|
||
James Clark
|
4f64a6c9f6 |
perf: Fix perf_event_pmu_context serialization
Syzkaller triggered a WARN in put_pmu_ctx().
WARNING: CPU: 1 PID: 2245 at kernel/events/core.c:4925 put_pmu_ctx+0x1f0/0x278
This is because there is no locking around the access of "if
(!epc->ctx)" in find_get_pmu_context() and when it is set to NULL in
put_pmu_ctx().
The decrement of the reference count in put_pmu_ctx() also happens
outside of the spinlock, leading to the possibility of this order of
events, and the context being cleared in put_pmu_ctx(), after its
refcount is non zero:
CPU0 CPU1
find_get_pmu_context()
if (!epc->ctx) == false
put_pmu_ctx()
atomic_dec_and_test(&epc->refcount) == true
epc->refcount == 0
atomic_inc(&epc->refcount);
epc->refcount == 1
list_del_init(&epc->pmu_ctx_entry);
epc->ctx = NULL;
Another issue is that WARN_ON for no active PMU events in put_pmu_ctx()
is outside of the lock. If the perf_event_pmu_context is an embedded
one, even after clearing it, it won't be deleted and can be re-used. So
the warning can trigger. For this reason it also needs to be moved
inside the lock.
The above warning is very quick to trigger on Arm by running these two
commands at the same time:
while true; do perf record -- ls; done
while true; do perf record -- ls; done
[peterz: atomic_dec_and_raw_lock*()]
Fixes:
|
||
|
Linus Torvalds
|
ab072681ea |
- Cleanup the firmware node for the new IRQ MSI domain properly, to
avoid leaking memory -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmPWd70ACgkQEsHwGGHe VUpTgxAAjKo7kjhyE9PjKA8tJ5pv6I/21tieu/JAmRyb8AVkhi21elXJaRoEPW4k 2TuSd0WMxZeoRJ1N366HcGPZcsldKN45v3xXEv1e3XSL6ZTAIFsYvwni6adwVocS ztnZBrMuHf1KZW/6ES956qGmWsum0rYcU2sr0kvnS9ihPiXJsbeLfNF1VXPwaH2y DTnTxgl/QtuipSQYOUvLSk1XBduvE+Wx8kE1S6TrdlWE9qsD/Jn1Jn7btaLQeHfs 27AXTNGYnVHeRZSVy6d38dIwU4Gh6LcLMFfTtNENIqTVCUfc/QcAb/gItDF0NvIr fgKbkdmI7jc0rIfLGlBUM8WZ0OaxopFwvchVywjcogDpCfLvJbgR7JplEKTfltgz 62IjvTF6vXUCcjySwu/C48EE2G7CWL0FtIcJofZsI0yTeHESkwFf1r5eOjnTV2ao M2QYGeToRtk7z9vb+pa0ZttD55TKXQKZDBv+lBRKLTy8SeIzlExJswIAuGTpWuKR ntwrdtekyM2HNir/l9ad1X2mjVblivEEv1hLMpsxPsthigWXDr+PZtQIxHCao8wj aKY4bI0F1AXByuKhQAwX/RVHUmB+AGrzJ/M5Fdj+ealQ6Nk+xCrPyTX2qDmveiSF NlQZpGCxV+gI/8q9YU4coJm1AioT8TSFsMxaufGZCreqqaWBXl0= =qrIZ -----END PGP SIGNATURE----- Merge tag 'irq_urgent_for_v6.2_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fix from Borislav Petkov: - Cleanup the firmware node for the new IRQ MSI domain properly, to avoid leaking memory * tag 'irq_urgent_for_v6.2_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq/msi: Free the fwnode created by msi_create_device_irq_domain() |
||
Jakub Kicinski
|
0548c5f26a |
bpf-for-netdev
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQTFp0I1jqZrAX+hPRXbK58LschIgwUCY9RCwAAKCRDbK58LschI g7drAQDfMPc1Q2CE4LZ9oh2wu1Nt2/85naTDK/WirlCToKs0xwD+NRQOyO3hcoJJ rOCwfjOlAm+7uqtiwwodBvWgTlDgVAM= =0fC+ -----END PGP SIGNATURE----- Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf Daniel Borkmann says: ==================== bpf 2023-01-27 We've added 10 non-merge commits during the last 9 day(s) which contain a total of 10 files changed, 170 insertions(+), 59 deletions(-). The main changes are: 1) Fix preservation of register's parent/live fields when copying range-info, from Eduard Zingerman. 2) Fix an off-by-one bug in bpf_mem_cache_idx() to select the right cache, from Hou Tao. 3) Fix stack overflow from infinite recursion in sock_map_close(), from Jakub Sitnicki. 4) Fix missing btf_put() in register_btf_id_dtor_kfuncs()'s error path, from Jiri Olsa. 5) Fix a splat from bpf_setsockopt() via lsm_cgroup/socket_sock_rcv_skb, from Kui-Feng Lee. 6) Fix bpf_send_signal[_thread]() helpers to hold a reference on the task, from Yonghong Song. * tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: bpf: Fix the kernel crash caused by bpf_setsockopt(). selftests/bpf: Cover listener cloning with progs attached to sockmap selftests/bpf: Pass BPF skeleton to sockmap_listen ops tests bpf, sockmap: Check for any of tcp_bpf_prots when cloning a listener bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself bpf: Add missing btf_put to register_btf_id_dtor_kfuncs selftests/bpf: Verify copy_register_state() preserves parent/live fields bpf: Fix to preserve reg parent/live fields when copying range info bpf: Fix a possible task gone issue with bpf_send_signal[_thread]() helpers bpf: Fix off-by-one error in bpf_mem_cache_idx() ==================== Link: https://lore.kernel.org/r/20230127215820.4993-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
||
|
Linus Torvalds
|
d786f0fe5e |
Tracing updates for 6.2:
- Fix filter memory leak by calling ftrace_free_filter() - Initialize trace_printk() earlier so that ftrace_dump_on_oops shows data on early crashes. - Update the outdated instructions in scripts/tracing/ftrace-bisect.sh - Add lockdep_is_held() to fix lockdep warning - Add allocation failure check in create_hist_field() - Don't initialize pointer that gets set right away in enabled_monitors_write() - Update MAINTAINER entries - Fix help messages in Kconfigs - Fix kernel-doc header for update_preds() -----BEGIN PGP SIGNATURE----- iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCY9MaCBQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qqb4AP4p78mTVP/Rw5oLCRUM4E7JGb8hmxuZ HD0RR9fbvyDaQAD/ffkar/KmvGCfCvBNrkGvvx98dwtGIssIB1dShoEZPAU= =lBwh -----END PGP SIGNATURE----- Merge tag 'trace-v6.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fixes from Steven Rostedt: - Fix filter memory leak by calling ftrace_free_filter() - Initialize trace_printk() earlier so that ftrace_dump_on_oops shows data on early crashes. - Update the outdated instructions in scripts/tracing/ftrace-bisect.sh - Add lockdep_is_held() to fix lockdep warning - Add allocation failure check in create_hist_field() - Don't initialize pointer that gets set right away in enabled_monitors_write() - Update MAINTAINER entries - Fix help messages in Kconfigs - Fix kernel-doc header for update_preds() * tag 'trace-v6.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: bootconfig: Update MAINTAINERS file to add tree and mailing list rv: remove redundant initialization of pointer ptr ftrace: Maintain samples/ftrace tracing/filter: fix kernel-doc warnings lib: Kconfig: fix spellos trace_events_hist: add check for return value of 'create_hist_field' tracing/osnoise: Use built-in RCU list checking tracing: Kconfig: Fix spelling/grammar/punctuation ftrace/scripts: Update the instructions for ftrace-bisect.sh tracing: Make sure trace_printk() can output as soon as it can be used ftrace: Export ftrace_free_filter() to modules |
||
Kui-Feng Lee
|
5416c9aea8 |
bpf: Fix the kernel crash caused by bpf_setsockopt().
The kernel crash was caused by a BPF program attached to the
"lsm_cgroup/socket_sock_rcv_skb" hook, which performed a call to
`bpf_setsockopt()` in order to set the TCP_NODELAY flag as an
example. Flags like TCP_NODELAY can prompt the kernel to flush a
socket's outgoing queue, and this hook
"lsm_cgroup/socket_sock_rcv_skb" is frequently triggered by
softirqs. The issue was that in certain circumstances, when
`tcp_write_xmit()` was called to flush the queue, it would also allow
BH (bottom-half) to run. This could lead to our program attempting to
flush the same socket recursively, which caused a `skbuff` to be
unlinked twice.
`security_sock_rcv_skb()` is triggered by `tcp_filter()`. This occurs
before the sock ownership is checked in `tcp_v4_rcv()`. Consequently,
if a bpf program runs on `security_sock_rcv_skb()` while under softirq
conditions, it may not possess the lock needed for `bpf_setsockopt()`,
thus presenting an issue.
The patch fixes this issue by ensuring that a BPF program attached to
the "lsm_cgroup/socket_sock_rcv_skb" hook is not allowed to call
`bpf_setsockopt()`.
The differences from v1 are
- changing commit log to explain holding the lock of the sock,
- emphasizing that TCP_NODELAY is not the only flag, and
- adding the fixes tag.
v1: https://lore.kernel.org/bpf/20230125000244.1109228-1-kuifeng@meta.com/
Signed-off-by: Kui-Feng Lee <kuifeng@meta.com>
Fixes:
|
||
|
Waiman Long
|
1d61659ced |
locking/rwsem: Disable preemption in all down_write*() and up_write() code paths
The previous patch has disabled preemption in all the down_read() and
up_read() code paths. For symmetry, this patch extends commit:
|
||
|
Waiman Long
|
3f5245538a |
locking/rwsem: Disable preemption in all down_read*() and up_read() code paths
Commit: |
||
|
Waiman Long
|
b613c7f314 |
locking/rwsem: Prevent non-first waiter from spinning in down_write() slowpath
A non-first waiter can potentially spin in the for loop of
rwsem_down_write_slowpath() without sleeping but fail to acquire the
lock even if the rwsem is free if the following sequence happens:
Non-first RT waiter First waiter Lock holder
------------------- ------------ -----------
Acquire wait_lock
rwsem_try_write_lock():
Set handoff bit if RT or
wait too long
Set waiter->handoff_set
Release wait_lock
Acquire wait_lock
Inherit waiter->handoff_set
Release wait_lock
Clear owner
Release lock
if (waiter.handoff_set) {
rwsem_spin_on_owner(();
if (OWNER_NULL)
goto trylock_again;
}
trylock_again:
Acquire wait_lock
rwsem_try_write_lock():
if (first->handoff_set && (waiter != first))
return false;
Release wait_lock
A non-first waiter cannot really acquire the rwsem even if it mistakenly
believes that it can spin on OWNER_NULL value. If that waiter happens
to be an RT task running on the same CPU as the first waiter, it can
block the first waiter from acquiring the rwsem leading to live lock.
Fix this problem by making sure that a non-first waiter cannot spin in
the slowpath loop without sleeping.
Fixes:
|
||
Ingo Molnar
|
6397859c8e |
Linux 6.2-rc5
-----BEGIN PGP SIGNATURE----- iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmPMgtUeHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGv7wH/3J6vjENrW+Jg/3W Vhr8bDEBtZ0+myheNZQTjR+/VNLI88UPxp9AV4a5qH1jlPmmqEC1AJcCN5sg9PMB Kqr8Jr6gOLI8zVKP7fAhbiJVL0bjtZv4G/IEk5y30jNyO40YBVqwhPwUD8Umhooy DAHDXyDF3laWk6bMEmJODahM0rdVmPLqvH+X+ALcliRh0SK61t+bMG/4Ox/j81HO 7d61Kd0ttXuzsPdwWmZWiDFMc+KxQ4004vCemU4dZwOaDW3RJU7Uc84+fCBH6nJC HEzcIaAu9FdmSBY0U1fH8BNIiaBAo+nye2LgV5mZ9LQ77MfuMdDo0I+rWjtBmEp0 hayPOPI= =aO6E -----END PGP SIGNATURE----- Merge tag 'v6.2-rc5' into locking/core, to pick up fixes Refresh this branch with the latest locking fixes, before applying a new series of changes. Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
Colin Ian King
|
ae3edea88e |
rv: remove redundant initialization of pointer ptr
The pointer ptr is being initialized with a value that is never read, it is being updated later on a call to strim. Remove the extraneous initialization. Link: https://lkml.kernel.org/r/20230116161612.77192-1-colin.i.king@gmail.com Cc: Daniel Bristot de Oliveira <bristot@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> |
||
Randy Dunlap
|
d5090d91ec |
tracing/filter: fix kernel-doc warnings
Use the 'struct' keyword for a struct's kernel-doc notation and use the correct function parameter name to eliminate kernel-doc warnings: kernel/trace/trace_events_filter.c:136: warning: cannot understand function prototype: 'struct prog_entry ' kerne/trace/trace_events_filter.c:155: warning: Excess function parameter 'when_to_branch' description in 'update_preds' Also correct some trivial punctuation problems. Link: https://lkml.kernel.org/r/20230108021238.16398-1-rdunlap@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> |
||
Natalia Petrova
|
8b152e9150 |
trace_events_hist: add check for return value of 'create_hist_field'
Function 'create_hist_field' is called recursively at
trace_events_hist.c:1954 and can return NULL-value that's why we have
to check it to avoid null pointer dereference.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Link: https://lkml.kernel.org/r/20230111120409.4111-1-n.petrova@fintech.ru
Cc: stable@vger.kernel.org
Fixes:
|
||
Chuang Wang
|
685b64e4d6 |
tracing/osnoise: Use built-in RCU list checking
list_for_each_entry_rcu() has built-in RCU and lock checking.
Pass cond argument to list_for_each_entry_rcu() to silence false lockdep
warning when CONFIG_PROVE_RCU_LIST is enabled.
Execute as follow:
[tracing]# echo osnoise > current_tracer
[tracing]# echo 1 > tracing_on
[tracing]# echo 0 > tracing_on
The trace_types_lock is held when osnoise_tracer_stop() or
timerlat_tracer_stop() are called in the non-RCU read side section.
So, pass lockdep_is_held(&trace_types_lock) to silence false lockdep
warning.
Link: https://lkml.kernel.org/r/20221227023036.784337-1-nashuiliang@gmail.com
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Fixes:
|
||
Petr Pavlu
|
0254127ab9 |
module: Don't wait for GOING modules
During a system boot, it can happen that the kernel receives a burst of requests to insert the same module but loading it eventually fails during its init call. For instance, udev can make a request to insert a frequency module for each individual CPU when another frequency module is already loaded which causes the init function of the new module to return an error. Since commit |
||
|
Randy Dunlap
|
ac28d0a0f4 |
tracing: Kconfig: Fix spelling/grammar/punctuation
Fix some editorial nits in trace Kconfig. Link: https://lkml.kernel.org/r/20230124181647.15902-1-rdunlap@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> |
||
|
Steven Rostedt (Google)
|
3bb06eb6e9 |
tracing: Make sure trace_printk() can output as soon as it can be used
Currently trace_printk() can be used as soon as early_trace_init() is
called from start_kernel(). But if a crash happens, and
"ftrace_dump_on_oops" is set on the kernel command line, all you get will
be:
[ 0.456075] <idle>-0 0dN.2. 347519us : Unknown type 6
[ 0.456075] <idle>-0 0dN.2. 353141us : Unknown type 6
[ 0.456075] <idle>-0 0dN.2. 358684us : Unknown type 6
This is because the trace_printk() event (type 6) hasn't been registered
yet. That gets done via an early_initcall(), which may be early, but not
early enough.
Instead of registering the trace_printk() event (and other ftrace events,
which are not trace events) via an early_initcall(), have them registered at
the same time that trace_printk() can be used. This way, if there is a
crash before early_initcall(), then the trace_printk()s will actually be
useful.
Link: https://lkml.kernel.org/r/20230104161412.019f6c55@gandalf.local.home
Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Fixes:
|
||
Mark Rutland
|
8be9fbd534 |
ftrace: Export ftrace_free_filter() to modules
Setting filters on an ftrace ops results in some memory being allocated for the filter hashes, which must be freed before the ops can be freed. This can be done by removing every individual element of the hash by calling ftrace_set_filter_ip() or ftrace_set_filter_ips() with `remove` set, but this is somewhat error prone as it's easy to forget to remove an element. Make it easier to clean this up by exporting ftrace_free_filter(), which can be used to clean up all of the filter hashes after an ftrace_ops has been unregistered. Using this, fix the ftrace-direct* samples to free hashes prior to being unloaded. All other code either removes individual filters explicitly or is built-in and already calls ftrace_free_filter(). Link: https://lkml.kernel.org/r/20230103124912.2948963-3-mark.rutland@arm.com Cc: stable@vger.kernel.org Cc: Florent Revest <revest@chromium.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Fixes: |
||
|
Linus Torvalds
|
2475bf0250 |
- Make sure the scheduler doesn't use stale frequency scaling values when latter
get disabled due to a value error - Fix a NULL pointer access on UP configs - Use the proper locking when updating CPU capacity -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmPNKRsACgkQEsHwGGHe VUr8NA/9GTqGUpOq0iRQkEOE1oAdT4ZxJ9dQpaWjwWSNv40HT7XJBzjtvzAyiOBF LTUVClBct5i1/j0tVcNq1zXEj3im2e24Ki6A1TWukejgGAMT/7siSkuChEDAMg2M b79nKCMpuIZMzkJND3qTkW/aMPpAyU82G8BeLCjw7vgPBsbVkjgbxGFKYdHgpLZa kdX/GhOufu40jcGeUxA4zWTpXfuXT3OG7JYLrlHeJ/HEdzy9kLCkWH4jHHllzPQw c4JwG7UnNkDKD6zkG0Guzi1zQy39egh/kaj7FQmVap9sneq+x69T4ta0BfXdBXnQ Vsqc/nnOybUzr9Gjg5W6KRZWk0k6hK9n3+cye88BfRvzMY0KAgxeCiZEn7cuKqZp 15Agzz77vcwt32QsxjSp+hKQxJtePcBCurDhkfuAZyPELNIBeCW6inrXArprfTIg IfEF068GKsvDGu3I/z49VXFZ9YBoerQREHbN/xL1VNeB8VoAxAE227OMUvhMcIu1 jxVvkESwc9BIybTcJbUjgg2i9t+Fv3gtZBQ6GFfDboHneia4U5a9aTyN6QGjX+5P SIXPhePbFCNrhW7JbSGqKBd96MczbFNQinRhgX1lBU0241cAnchY4nH9fUvv7Zrt b/QDg58tb2bJkm1Z08L256ZETELOU9nLJVxUbtBNSSO9dfkvoBs= =aNSK -----END PGP SIGNATURE----- Merge tag 'sched_urgent_for_v6.2_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes from Borislav Petkov: - Make sure the scheduler doesn't use stale frequency scaling values when latter get disabled due to a value error - Fix a NULL pointer access on UP configs - Use the proper locking when updating CPU capacity * tag 'sched_urgent_for_v6.2_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/aperfmperf: Erase stale arch_freq_scale values when disabling frequency invariance readings sched/core: Fix NULL pointer access fault in sched_setaffinity() with non-SMP configs sched/fair: Fixes for capacity inversion detection sched/uclamp: Fix a uninitialized variable warnings |
||
|
Linus Torvalds
|
c88a311470 |
Driver core fixes for 6.2-rc5
Here are 3 small driver and kernel core fixes for 6.2-rc5. They include: - potential gadget fixup in do_prlimit - device property refcount leak fix - test_async_probe bugfix for reported problem. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCY8wB5g8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+yl+5ACfbXPXK7nokMtxvs/9ybhH+IM63X0AmwYXZ5mK 3dCNVFru/lAZzS7HaR5F =4fuA -----END PGP SIGNATURE----- Merge tag 'driver-core-6.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core fixes from Greg KH: "Here are three small driver and kernel core fixes for 6.2-rc5. They include: - potential gadget fixup in do_prlimit - device property refcount leak fix - test_async_probe bugfix for reported problem" * tag 'driver-core-6.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: prlimit: do_prlimit needs to have a speculation check driver core: Fix test_async_probe_init saves device in wrong array device property: fix of node refcount leak in fwnode_graph_get_next_endpoint() |
||
|
Linus Torvalds
|
83cd5fd014 |
Kbuild fixes for v6.2 (3rd)
- Hide LDFLAGS_vmlinux from decompressor Makefiles to fix error messages
when GNU Make 4.4 is used.
- Fix 'make modules' build error when CONFIG_DEBUG_INFO_BTF_MODULES=y.
- Fix warnings emitted by GNU Make 4.4 in scripts/kconfig/Makefile.
- Support GNU Make 4.4 for scripts/jobserver-exec.
- Show clearer error message when kernel/gen_kheaders.sh fails due to
missing cpio.
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Merge tag 'kbuild-fixes-v6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Hide LDFLAGS_vmlinux from decompressor Makefiles to fix error
messages when GNU Make 4.4 is used.
- Fix 'make modules' build error when CONFIG_DEBUG_INFO_BTF_MODULES=y.
- Fix warnings emitted by GNU Make 4.4 in scripts/kconfig/Makefile.
- Support GNU Make 4.4 for scripts/jobserver-exec.
- Show clearer error message when kernel/gen_kheaders.sh fails due to
missing cpio.
* tag 'kbuild-fixes-v6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kheaders: explicitly validate existence of cpio command
scripts: support GNU make 4.4 in jobserver-exec
kconfig: Update all declared targets
scripts: rpm: make clear that mkspec script contains 4.13 feature
init/Kconfig: fix LOCALVERSION_AUTO help text
kbuild: fix 'make modules' error when CONFIG_DEBUG_INFO_BTF_MODULES=y
kbuild: export top-level LDFLAGS_vmlinux only to scripts/Makefile.vmlinux
init/version-timestamp.c: remove unneeded #include <linux/version.h>
docs: kbuild: remove mention to dropped $(objtree) feature
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