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Commit Graph

38318 Commits

Author SHA1 Message Date
Jakub Kicinski
6b5567b1b2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
No conflicts.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-17 11:44:20 -08:00
Dmitry Torokhov
a8e8f851e8 module: fix building with sysfs disabled
Sysfs support might be disabled so we need to guard the code that
instantiates "compression" attribute with an #ifdef.

Fixes: b1ae6dc41e ("module: add in-kernel support for decompressing")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
2022-02-16 12:51:32 -08:00
Linus Torvalds
6f35736723 - Fix a NULL-ptr dereference when recalculating a sched entity's weight
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Merge tag 'sched_urgent_for_v5.17_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fix from Borislav Petkov:
 "Fix a NULL-ptr dereference when recalculating a sched entity's weight"

* tag 'sched_urgent_for_v5.17_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Fix fault in reweight_entity
2022-02-13 09:27:26 -08:00
Linus Torvalds
f5e02656b1 - Prevent cgroup event list corruption when switching events
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Merge tag 'perf_urgent_for_v5.17_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fix from Borislav Petkov:
 "Prevent cgroup event list corruption when switching events"

* tag 'perf_urgent_for_v5.17_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Fix list corruption in perf_cgroup_switch()
2022-02-13 09:25:26 -08:00
Linus Torvalds
eef8cffcab seccomp fixes for v5.17-rc4
- Force HANDLER_EXIT even for SIGNAL_UNKILLABLE.
 - Make seccomp self-destruct after fatal filter results.
 - Update seccomp samples for easier behavioral demonstration.
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Merge tag 'seccomp-v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull seccomp fixes from Kees Cook:
 "This fixes a corner case of fatal SIGSYS being ignored since v5.15.
  Along with the signal fix is a change to seccomp so that seeing
  another syscall after a fatal filter result will cause seccomp to kill
  the process harder.

  Summary:

   - Force HANDLER_EXIT even for SIGNAL_UNKILLABLE

   - Make seccomp self-destruct after fatal filter results

   - Update seccomp samples for easier behavioral demonstration"

* tag 'seccomp-v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  samples/seccomp: Adjust sample to also provide kill option
  seccomp: Invalidate seccomp mode to catch death failures
  signal: HANDLER_EXIT should clear SIGNAL_UNKILLABLE
2022-02-12 09:04:05 -08:00
Linus Torvalds
883fd0aba1 ACPI fixes for 5.17-rc4
- Revert a recent change that attempted to avoid issues with
    conflicting address ranges during PCI initialization, because it
    turned out to introduce a regression (Hans de Goede).
 
  - Revert a change that limited EC GPE wakeups from suspend-to-idle
    to systems based on Intel hardware, because it turned out that
    systems based on hardware from other vendors depended on that
    functionality too (Mario Limonciello).
 
  - Fix two issues related to the handling of wakeup interrupts and
    wakeup events signaled through the EC GPE during suspend-to-idle
    on x86 (Rafael Wysocki).
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Merge tag 'acpi-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "These revert two commits that turned out to be problematic and fix two
  issues related to wakeup from suspend-to-idle on x86.

  Specifics:

   - Revert a recent change that attempted to avoid issues with
     conflicting address ranges during PCI initialization, because it
     turned out to introduce a regression (Hans de Goede).

   - Revert a change that limited EC GPE wakeups from suspend-to-idle to
     systems based on Intel hardware, because it turned out that systems
     based on hardware from other vendors depended on that functionality
     too (Mario Limonciello).

   - Fix two issues related to the handling of wakeup interrupts and
     wakeup events signaled through the EC GPE during suspend-to-idle on
     x86 (Rafael Wysocki)"

* tag 'acpi-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  x86/PCI: revert "Ignore E820 reservations for bridge windows on newer systems"
  PM: s2idle: ACPI: Fix wakeup interrupts handling
  ACPI: PM: s2idle: Cancel wakeup before dispatching EC GPE
  ACPI: PM: Revert "Only mark EC GPE for wakeup on Intel systems"
2022-02-11 11:48:13 -08:00
Linus Torvalds
32f6c5d037 Tracing fixes:
- Fixes to the RTLA tooling.
 
  - A fix to a tp_printk overriding tp_printk_stop_on_boot on command line.
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Merge tag 'trace-v5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:

 - Fixes to the RTLA tooling

 - A fix to a tp_printk overriding tp_printk_stop_on_boot on the
   command line

* tag 'trace-v5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix tp_printk option related with tp_printk_stop_on_boot
  MAINTAINERS: Add RTLA entry
  rtla: Fix segmentation fault when failing to enable -t
  rtla/trace: Error message fixup
  rtla/utils: Fix session duration parsing
  rtla: Follow kernel version
2022-02-11 10:22:48 -08:00
Kees Cook
495ac3069a seccomp: Invalidate seccomp mode to catch death failures
If seccomp tries to kill a process, it should never see that process
again. To enforce this proactively, switch the mode to something
impossible. If encountered: WARN, reject all syscalls, and attempt to
kill the process again even harder.

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Will Drewry <wad@chromium.org>
Fixes: 8112c4f140 ("seccomp: remove 2-phase API")
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
2022-02-10 19:09:12 -08:00
Kees Cook
5c72263ef2 signal: HANDLER_EXIT should clear SIGNAL_UNKILLABLE
Fatal SIGSYS signals (i.e. seccomp RET_KILL_* syscall filter actions)
were not being delivered to ptraced pid namespace init processes. Make
sure the SIGNAL_UNKILLABLE doesn't get set for these cases.

Reported-by: Robert Święcki <robert@swiecki.net>
Suggested-by: "Eric W. Biederman" <ebiederm@xmission.com>
Fixes: 00b06da29c ("signal: Add SA_IMMUTABLE to ensure forced siganls do not get changed")
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Link: https://lore.kernel.org/lkml/878rui8u4a.fsf@email.froward.int.ebiederm.org
2022-02-10 19:08:54 -08:00
Jakub Kicinski
5b91c5cc0e Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
No conflicts.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-10 17:29:56 -08:00
Linus Torvalds
252787201e audit/stable-5.17 PR 20220209
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Merge tag 'audit-pr-20220209' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

Pull audit fix from Paul Moore:
 "Another audit fix, this time a single rather small but important fix
  for an oops/page-fault caused by improperly accessing userspace
  memory"

* tag 'audit-pr-20220209' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
  audit: don't deref the syscall args when checking the openat2 open_how::flags
2022-02-10 05:43:43 -08:00
Jakub Kicinski
1127170d45 Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Daniel Borkmann says:

====================
pull-request: bpf-next 2022-02-09

We've added 126 non-merge commits during the last 16 day(s) which contain
a total of 201 files changed, 4049 insertions(+), 2215 deletions(-).

The main changes are:

1) Add custom BPF allocator for JITs that pack multiple programs into a huge
   page to reduce iTLB pressure, from Song Liu.

2) Add __user tagging support in vmlinux BTF and utilize it from BPF
   verifier when generating loads, from Yonghong Song.

3) Add per-socket fast path check guarding from cgroup/BPF overhead when
   used by only some sockets, from Pavel Begunkov.

4) Continued libbpf deprecation work of APIs/features and removal of their
   usage from samples, selftests, libbpf & bpftool, from Andrii Nakryiko
   and various others.

5) Improve BPF instruction set documentation by adding byte swap
   instructions and cleaning up load/store section, from Christoph Hellwig.

6) Switch BPF preload infra to light skeleton and remove libbpf dependency
   from it, from Alexei Starovoitov.

7) Fix architecture-agnostic macros in libbpf for accessing syscall
   arguments from BPF progs for non-x86 architectures,
   from Ilya Leoshkevich.

8) Rework port members in struct bpf_sk_lookup and struct bpf_sock to be
   of 16-bit field with anonymous zero padding, from Jakub Sitnicki.

9) Add new bpf_copy_from_user_task() helper to read memory from a different
   task than current. Add ability to create sleepable BPF iterator progs,
   from Kenny Yu.

10) Implement XSK batching for ice's zero-copy driver used by AF_XDP and
    utilize TX batching API from XSK buffer pool, from Maciej Fijalkowski.

11) Generate temporary netns names for BPF selftests to avoid naming
    collisions, from Hangbin Liu.

12) Implement bpf_core_types_are_compat() with limited recursion for
    in-kernel usage, from Matteo Croce.

13) Simplify pahole version detection and finally enable CONFIG_DEBUG_INFO_DWARF5
    to be selected with CONFIG_DEBUG_INFO_BTF, from Nathan Chancellor.

14) Misc minor fixes to libbpf and selftests from various folks.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (126 commits)
  selftests/bpf: Cover 4-byte load from remote_port in bpf_sk_lookup
  bpf: Make remote_port field in struct bpf_sk_lookup 16-bit wide
  libbpf: Fix compilation warning due to mismatched printf format
  selftests/bpf: Test BPF_KPROBE_SYSCALL macro
  libbpf: Add BPF_KPROBE_SYSCALL macro
  libbpf: Fix accessing the first syscall argument on s390
  libbpf: Fix accessing the first syscall argument on arm64
  libbpf: Allow overriding PT_REGS_PARM1{_CORE}_SYSCALL
  selftests/bpf: Skip test_bpf_syscall_macro's syscall_arg1 on arm64 and s390
  libbpf: Fix accessing syscall arguments on riscv
  libbpf: Fix riscv register names
  libbpf: Fix accessing syscall arguments on powerpc
  selftests/bpf: Use PT_REGS_SYSCALL_REGS in bpf_syscall_macro
  libbpf: Add PT_REGS_SYSCALL_REGS macro
  selftests/bpf: Fix an endianness issue in bpf_syscall_macro test
  bpf: Fix bpf_prog_pack build HPAGE_PMD_SIZE
  bpf: Fix leftover header->pages in sparc and powerpc code.
  libbpf: Fix signedness bug in btf_dump_array_data()
  selftests/bpf: Do not export subtest as standalone test
  bpf, x86_64: Fail gracefully on bpf_jit_binary_pack_finalize failures
  ...
====================

Link: https://lore.kernel.org/r/20220209210050.8425-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-09 18:40:56 -08:00
Paul Moore
7a82f89de9 audit: don't deref the syscall args when checking the openat2 open_how::flags
As reported by Jeff, dereferencing the openat2 syscall argument in
audit_match_perm() to obtain the open_how::flags can result in an
oops/page-fault.  This patch fixes this by using the open_how struct
that we store in the audit_context with audit_openat2_how().

Independent of this patch, Richard Guy Briggs posted a similar patch
to the audit mailing list roughly 40 minutes after this patch was
posted.

Cc: stable@vger.kernel.org
Fixes: 1c30e3af8a ("audit: add support for the openat2 syscall")
Reported-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
2022-02-09 16:04:26 -05:00
Song Liu
c1b13a9451 bpf: Fix bpf_prog_pack build HPAGE_PMD_SIZE
Fix build with CONFIG_TRANSPARENT_HUGEPAGE=n with BPF_PROG_PACK_SIZE as
PAGE_SIZE.

Fixes: 57631054fa ("bpf: Introduce bpf_prog_pack allocator")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220208220509.4180389-3-song@kernel.org
2022-02-08 18:37:10 -08:00
JaeSang Yoo
3203ce39ac tracing: Fix tp_printk option related with tp_printk_stop_on_boot
The kernel parameter "tp_printk_stop_on_boot" starts with "tp_printk" which is
the same as another kernel parameter "tp_printk". If "tp_printk" setup is
called before the "tp_printk_stop_on_boot", it will override the latter
and keep it from being set.

This is similar to other kernel parameter issues, such as:
  Commit 745a600cf1 ("um: console: Ignore console= option")
or init/do_mounts.c:45 (setup function of "ro" kernel param)

Fix it by checking for a "_" right after the "tp_printk" and if that
exists do not process the parameter.

Link: https://lkml.kernel.org/r/20220208195421.969326-1-jsyoo5b@gmail.com

Signed-off-by: JaeSang Yoo <jsyoo5b@gmail.com>
[ Fixed up change log and added space after if condition ]
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-02-08 15:47:00 -05:00
Song Liu
33c9805860 bpf: Introduce bpf_jit_binary_pack_[alloc|finalize|free]
This is the jit binary allocator built on top of bpf_prog_pack.

bpf_prog_pack allocates RO memory, which cannot be used directly by the
JIT engine. Therefore, a temporary rw buffer is allocated for the JIT
engine. Once JIT is done, bpf_jit_binary_pack_finalize is used to copy
the program to the RO memory.

bpf_jit_binary_pack_alloc reserves 16 bytes of extra space for illegal
instructions, which is small than the 128 bytes space reserved by
bpf_jit_binary_alloc. This change is necessary for bpf_jit_binary_hdr
to find the correct header. Also, flag use_bpf_prog_pack is added to
differentiate a program allocated by bpf_jit_binary_pack_alloc.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220204185742.271030-9-song@kernel.org
2022-02-07 18:13:01 -08:00
Song Liu
57631054fa bpf: Introduce bpf_prog_pack allocator
Most BPF programs are small, but they consume a page each. For systems
with busy traffic and many BPF programs, this could add significant
pressure to instruction TLB. High iTLB pressure usually causes slow down
for the whole system, which includes visible performance degradation for
production workloads.

Introduce bpf_prog_pack allocator to pack multiple BPF programs in a huge
page. The memory is then allocated in 64 byte chunks.

Memory allocated by bpf_prog_pack allocator is RO protected after initial
allocation. To write to it, the user (jit engine) need to use text poke
API.

Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220204185742.271030-8-song@kernel.org
2022-02-07 18:13:01 -08:00
Song Liu
ebc1415d9b bpf: Introduce bpf_arch_text_copy
This will be used to copy JITed text to RO protected module memory. On
x86, bpf_arch_text_copy is implemented with text_poke_copy.

bpf_arch_text_copy returns pointer to dst on success, and ERR_PTR(errno)
on errors.

Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220204185742.271030-7-song@kernel.org
2022-02-07 18:13:01 -08:00
Song Liu
d00c6473b1 bpf: Use prog->jited_len in bpf_prog_ksym_set_addr()
Using prog->jited_len is simpler and more accurate than current
estimation (header + header->size).

Also, fix missing prog->jited_len with multi function program. This hasn't
been a real issue before this.

Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220204185742.271030-5-song@kernel.org
2022-02-07 18:13:01 -08:00
Song Liu
ed2d9e1a26 bpf: Use size instead of pages in bpf_binary_header
This is necessary to charge sub page memory for the BPF program.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220204185742.271030-4-song@kernel.org
2022-02-07 18:13:01 -08:00
Song Liu
3486bedd99 bpf: Use bytes instead of pages for bpf_jit_[charge|uncharge]_modmem
This enables sub-page memory charge and allocation.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220204185742.271030-3-song@kernel.org
2022-02-07 18:13:01 -08:00
Rafael J. Wysocki
cb1f65c1e1 PM: s2idle: ACPI: Fix wakeup interrupts handling
After commit e3728b50cd ("ACPI: PM: s2idle: Avoid possible race
related to the EC GPE") wakeup interrupts occurring immediately after
the one discarded by acpi_s2idle_wake() may be missed.  Moreover, if
the SCI triggers again immediately after the rearming in
acpi_s2idle_wake(), that wakeup may be missed too.

The problem is that pm_system_irq_wakeup() only calls pm_system_wakeup()
when pm_wakeup_irq is 0, but that's not the case any more after the
interrupt causing acpi_s2idle_wake() to run until pm_wakeup_irq is
cleared by the pm_wakeup_clear() call in s2idle_loop().  However,
there may be wakeup interrupts occurring in that time frame and if
that happens, they will be missed.

To address that issue first move the clearing of pm_wakeup_irq to
the point at which it is known that the interrupt causing
acpi_s2idle_wake() to tun will be discarded, before rearming the SCI
for wakeup.  Moreover, because that only reduces the size of the
time window in which the issue may manifest itself, allow
pm_system_irq_wakeup() to register two second wakeup interrupts in
a row and, when discarding the first one, replace it with the second
one.  [Of course, this assumes that only one wakeup interrupt can be
discarded in one go, but currently that is the case and I am not
aware of any plans to change that.]

Fixes: e3728b50cd ("ACPI: PM: s2idle: Avoid possible race related to the EC GPE")
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-02-07 21:02:31 +01:00
Song Liu
5f4e5ce638 perf: Fix list corruption in perf_cgroup_switch()
There's list corruption on cgrp_cpuctx_list. This happens on the
following path:

  perf_cgroup_switch: list_for_each_entry(cgrp_cpuctx_list)
      cpu_ctx_sched_in
         ctx_sched_in
            ctx_pinned_sched_in
              merge_sched_in
                  perf_cgroup_event_disable: remove the event from the list

Use list_for_each_entry_safe() to allow removing an entry during
iteration.

Fixes: 058fe1c044 ("perf/core: Make cgroup switch visit only cpuctxs with cgroup events")
Signed-off-by: Song Liu <song@kernel.org>
Reviewed-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220204004057.2961252-1-song@kernel.org
2022-02-06 22:37:27 +01:00
Tadeusz Struk
13765de814 sched/fair: Fix fault in reweight_entity
Syzbot found a GPF in reweight_entity. This has been bisected to
commit 4ef0c5c6b5 ("kernel/sched: Fix sched_fork() access an invalid
sched_task_group")

There is a race between sched_post_fork() and setpriority(PRIO_PGRP)
within a thread group that causes a null-ptr-deref in
reweight_entity() in CFS. The scenario is that the main process spawns
number of new threads, which then call setpriority(PRIO_PGRP, 0, -20),
wait, and exit.  For each of the new threads the copy_process() gets
invoked, which adds the new task_struct and calls sched_post_fork()
for it.

In the above scenario there is a possibility that
setpriority(PRIO_PGRP) and set_one_prio() will be called for a thread
in the group that is just being created by copy_process(), and for
which the sched_post_fork() has not been executed yet. This will
trigger a null pointer dereference in reweight_entity(), as it will
try to access the run queue pointer, which hasn't been set.

Before the mentioned change the cfs_rq pointer for the task  has been
set in sched_fork(), which is called much earlier in copy_process(),
before the new task is added to the thread_group.  Now it is done in
the sched_post_fork(), which is called after that.  To fix the issue
the remove the update_load param from the update_load param() function
and call reweight_task() only if the task flag doesn't have the
TASK_NEW flag set.

Fixes: 4ef0c5c6b5 ("kernel/sched: Fix sched_fork() access an invalid sched_task_group")
Reported-by: syzbot+af7a719bc92395ee41b3@syzkaller.appspotmail.com
Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20220203161846.1160750-1-tadeusz.struk@linaro.org
2022-02-06 22:37:26 +01:00
Linus Torvalds
c3bf8a1440 perf/urgent contains 3 fixups:
- Intel/PT: filters could crash the kernel
 
  - Intel: default disable the PMU for SMM, some new-ish EFI firmware has
    started using CPL3 and the PMU CPL filters don't discriminate against
    SMM, meaning that CPL3 (userspace only) events now also count EFI/SMM
    cycles.
 
  - Fixup for perf_event_attr::sig_data
 
 (Peter Zijlstra)
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Merge tag 'perf_urgent_for_v5.17_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Borislav Petkov:

 - Intel/PT: filters could crash the kernel

 - Intel: default disable the PMU for SMM, some new-ish EFI firmware has
   started using CPL3 and the PMU CPL filters don't discriminate against
   SMM, meaning that CPL3 (userspace only) events now also count EFI/SMM
   cycles.

 - Fixup for perf_event_attr::sig_data

* tag 'perf_urgent_for_v5.17_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/pt: Fix crash with stop filters in single-range mode
  perf: uapi: Document perf_event_attr::sig_data truncation on 32 bit architectures
  selftests/perf_events: Test modification of perf_event_attr::sig_data
  perf: Copy perf_event_attr::sig_data on modification
  x86/perf: Default set FREEZE_ON_SMI for all
2022-02-06 10:11:14 -08:00
Matteo Croce
e70e13e7d4 bpf: Implement bpf_core_types_are_compat().
Adopt libbpf's bpf_core_types_are_compat() for kernel duty by adding
explicit recursion limit of 2 which is enough to handle 2 levels of
function prototypes.

Signed-off-by: Matteo Croce <mcroce@microsoft.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220204005519.60361-2-mcroce@linux.microsoft.com
2022-02-04 11:26:26 -08:00
Jakub Kicinski
c59400a68c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
No conflicts.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-03 17:36:16 -08:00
Kees Cook
dcb85f85fa gcc-plugins/stackleak: Use noinstr in favor of notrace
While the stackleak plugin was already using notrace, objtool is now a
bit more picky.  Update the notrace uses to noinstr.  Silences the
following objtool warnings when building with:

CONFIG_DEBUG_ENTRY=y
CONFIG_STACK_VALIDATION=y
CONFIG_VMLINUX_VALIDATION=y
CONFIG_GCC_PLUGIN_STACKLEAK=y

  vmlinux.o: warning: objtool: do_syscall_64()+0x9: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: do_int80_syscall_32()+0x9: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: exc_general_protection()+0x22: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: fixup_bad_iret()+0x20: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: do_machine_check()+0x27: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .text+0x5346e: call to stackleak_erase() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .entry.text+0x143: call to stackleak_erase() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .entry.text+0x10eb: call to stackleak_erase() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .entry.text+0x17f9: call to stackleak_erase() leaves .noinstr.text section

Note that the plugin's addition of calls to stackleak_track_stack() from
noinstr functions is expected to be safe, as it isn't runtime
instrumentation and is self-contained.

Cc: Alexander Popov <alex.popov@linux.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-02-03 17:02:21 -08:00
Linus Torvalds
eb2eb5161c Networking fixes for 5.17-rc3, including fixes from bpf, netfilter,
and ieee802154.
 
 Current release - regressions:
 
  - Partially revert "net/smc: Add netlink net namespace support",
    fix uABI breakage
 
  - netfilter:
      - nft_ct: fix use after free when attaching zone template
      - nft_byteorder: track register operations
 
 Previous releases - regressions:
 
  - ipheth: fix EOVERFLOW in ipheth_rcvbulk_callback
 
  - phy: qca8081: fix speeds lower than 2.5Gb/s
 
  - sched: fix use-after-free in tc_new_tfilter()
 
 Previous releases - always broken:
 
  - tcp: fix mem under-charging with zerocopy sendmsg()
 
  - tcp: add missing tcp_skb_can_collapse() test in tcp_shift_skb_data()
 
  - neigh: do not trigger immediate probes on NUD_FAILED from
    neigh_managed_work, avoid a deadlock
 
  - bpf: use VM_MAP instead of VM_ALLOC for ringbuf, avoid KASAN
    false-positives
 
  - netfilter: nft_reject_bridge: fix for missing reply from prerouting
 
  - smc: forward wakeup to smc socket waitqueue after fallback
 
  - ieee802154:
      - return meaningful error codes from the netlink helpers
      - mcr20a: fix lifs/sifs periods
      - at86rf230, ca8210: stop leaking skbs on error paths
 
  - macsec: add missing un-offload call for NETDEV_UNREGISTER of parent
 
  - ax25: add refcount in ax25_dev to avoid UAF bugs
 
  - eth: mlx5e:
      - fix SFP module EEPROM query
      - fix broken SKB allocation in HW-GRO
      - IPsec offload: fix tunnel mode crypto for non-TCP/UDP flows
 
  - eth: amd-xgbe:
      - fix skb data length underflow
      - ensure reset of the tx_timer_active flag, avoid Tx timeouts
 
  - eth: stmmac: fix runtime pm use in stmmac_dvr_remove()
 
  - eth: e1000e: handshake with CSME starts from Alder Lake platforms
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-5.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from bpf, netfilter, and ieee802154.

  Current release - regressions:

   - Partially revert "net/smc: Add netlink net namespace support", fix
     uABI breakage

   - netfilter:
      - nft_ct: fix use after free when attaching zone template
      - nft_byteorder: track register operations

  Previous releases - regressions:

   - ipheth: fix EOVERFLOW in ipheth_rcvbulk_callback

   - phy: qca8081: fix speeds lower than 2.5Gb/s

   - sched: fix use-after-free in tc_new_tfilter()

  Previous releases - always broken:

   - tcp: fix mem under-charging with zerocopy sendmsg()

   - tcp: add missing tcp_skb_can_collapse() test in
     tcp_shift_skb_data()

   - neigh: do not trigger immediate probes on NUD_FAILED from
     neigh_managed_work, avoid a deadlock

   - bpf: use VM_MAP instead of VM_ALLOC for ringbuf, avoid KASAN
     false-positives

   - netfilter: nft_reject_bridge: fix for missing reply from prerouting

   - smc: forward wakeup to smc socket waitqueue after fallback

   - ieee802154:
      - return meaningful error codes from the netlink helpers
      - mcr20a: fix lifs/sifs periods
      - at86rf230, ca8210: stop leaking skbs on error paths

   - macsec: add missing un-offload call for NETDEV_UNREGISTER of parent

   - ax25: add refcount in ax25_dev to avoid UAF bugs

   - eth: mlx5e:
      - fix SFP module EEPROM query
      - fix broken SKB allocation in HW-GRO
      - IPsec offload: fix tunnel mode crypto for non-TCP/UDP flows

   - eth: amd-xgbe:
      - fix skb data length underflow
      - ensure reset of the tx_timer_active flag, avoid Tx timeouts

   - eth: stmmac: fix runtime pm use in stmmac_dvr_remove()

   - eth: e1000e: handshake with CSME starts from Alder Lake platforms"

* tag 'net-5.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (69 commits)
  ax25: fix reference count leaks of ax25_dev
  net: stmmac: ensure PTP time register reads are consistent
  net: ipa: request IPA register values be retained
  dt-bindings: net: qcom,ipa: add optional qcom,qmp property
  tools/resolve_btfids: Do not print any commands when building silently
  bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
  net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work
  tcp: add missing tcp_skb_can_collapse() test in tcp_shift_skb_data()
  net: sparx5: do not refer to skb after passing it on
  Partially revert "net/smc: Add netlink net namespace support"
  net/mlx5e: Avoid field-overflowing memcpy()
  net/mlx5e: Use struct_group() for memcpy() region
  net/mlx5e: Avoid implicit modify hdr for decap drop rule
  net/mlx5e: IPsec: Fix tunnel mode crypto offload for non TCP/UDP traffic
  net/mlx5e: IPsec: Fix crypto offload for non TCP/UDP encapsulated traffic
  net/mlx5e: Don't treat small ceil values as unlimited in HTB offload
  net/mlx5: E-Switch, Fix uninitialized variable modact
  net/mlx5e: Fix handling of wrong devices during bond netevent
  net/mlx5e: Fix broken SKB allocation in HW-GRO
  net/mlx5e: Fix wrong calculation of header index in HW_GRO
  ...
2022-02-03 16:54:18 -08:00
Jakub Kicinski
77b1b8b43e Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:

====================
pull-request: bpf 2022-02-03

We've added 6 non-merge commits during the last 10 day(s) which contain
a total of 7 files changed, 11 insertions(+), 236 deletions(-).

The main changes are:

1) Fix BPF ringbuf to allocate its area with VM_MAP instead of VM_ALLOC
   flag which otherwise trips over KASAN, from Hou Tao.

2) Fix unresolved symbol warning in resolve_btfids due to LSM callback
   rename, from Alexei Starovoitov.

3) Fix a possible race in inc_misses_counter() when IRQ would trigger
   during counter update, from He Fengqing.

4) Fix tooling infra for cross-building with clang upon probing whether
   gcc provides the standard libraries, from Jean-Philippe Brucker.

5) Fix silent mode build for resolve_btfids, from Nathan Chancellor.

6) Drop unneeded and outdated lirc.h header copy from tooling infra as
   BPF does not require it anymore, from Sean Young.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  tools/resolve_btfids: Do not print any commands when building silently
  bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
  tools: Ignore errors from `which' when searching a GCC toolchain
  tools headers UAPI: remove stale lirc.h
  bpf: Fix possible race in inc_misses_counter
  bpf: Fix renaming task_getsecid_subj->current_getsecid_subj.
====================

Link: https://lore.kernel.org/r/20220203155815.25689-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-03 13:42:38 -08:00
Yonghong Song
d7e7b42f4f bpf: Fix a btf decl_tag bug when tagging a function
syzbot reported a btf decl_tag bug with stack trace below:

  general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [] PREEMPT SMP KASAN
  KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
  CPU: 0 PID: 3592 Comm: syz-executor914 Not tainted 5.16.0-syzkaller-11424-gb7892f7d5cb2 
  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
  RIP: 0010:btf_type_vlen include/linux/btf.h:231 [inline]
  RIP: 0010:btf_decl_tag_resolve+0x83e/0xaa0 kernel/bpf/btf.c:3910
  ...
  Call Trace:
   <TASK>
   btf_resolve+0x251/0x1020 kernel/bpf/btf.c:4198
   btf_check_all_types kernel/bpf/btf.c:4239 [inline]
   btf_parse_type_sec kernel/bpf/btf.c:4280 [inline]
   btf_parse kernel/bpf/btf.c:4513 [inline]
   btf_new_fd+0x19fe/0x2370 kernel/bpf/btf.c:6047
   bpf_btf_load kernel/bpf/syscall.c:4039 [inline]
   __sys_bpf+0x1cbb/0x5970 kernel/bpf/syscall.c:4679
   __do_sys_bpf kernel/bpf/syscall.c:4738 [inline]
   __se_sys_bpf kernel/bpf/syscall.c:4736 [inline]
   __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4736
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x44/0xae

The kasan error is triggered with an illegal BTF like below:
   type 0: void
   type 1: int
   type 2: decl_tag to func type 3
   type 3: func to func_proto type 8
The total number of types is 4 and the type 3 is illegal
since its func_proto type is out of range.

Currently, the target type of decl_tag can be struct/union, var or func.
Both struct/union and var implemented their own 'resolve' callback functions
and hence handled properly in kernel.
But func type doesn't have 'resolve' callback function. When
btf_decl_tag_resolve() tries to check func type, it tries to get
vlen of its func_proto type, which triggered the above kasan error.

To fix the issue, btf_decl_tag_resolve() needs to do btf_func_check()
before trying to accessing func_proto type.
In the current implementation, func type is checked with
btf_func_check() in the main checking function btf_check_all_types().
To fix the above kasan issue, let us implement 'resolve' callback
func type properly. The 'resolve' callback will be also called
in btf_check_all_types() for func types.

Fixes: b5ea834dde ("bpf: Support for new btf kind BTF_KIND_TAG")
Reported-by: syzbot+53619be9444215e785ed@syzkaller.appspotmail.com
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20220203191727.741862-1-yhs@fb.com
2022-02-03 13:06:04 -08:00
Mickaël Salaün
1f2cfdd349 printk: Fix incorrect __user type in proc_dointvec_minmax_sysadmin()
The move of proc_dointvec_minmax_sysadmin() from kernel/sysctl.c to
kernel/printk/sysctl.c introduced an incorrect __user attribute to the
buffer argument.  I spotted this change in [1] as well as the kernel
test robot.  Revert this change to please sparse:

  kernel/printk/sysctl.c:20:51: warning: incorrect type in argument 3 (different address spaces)
  kernel/printk/sysctl.c:20:51:    expected void *
  kernel/printk/sysctl.c:20:51:    got void [noderef] __user *buffer

Fixes: faaa357a55 ("printk: move printk sysctl to printk/sysctl.c")
Link: https://lore.kernel.org/r/20220104155024.48023-2-mic@digikod.net [1]
Reported-by: kernel test robot <lkp@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com>
Link: https://lore.kernel.org/r/20220203145029.272640-1-mic@digikod.net
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-02-03 11:27:38 -08:00
Igor Pylypiv
67d6212afd Revert "module, async: async_synchronize_full() on module init iff async is used"
This reverts commit 774a1221e8.

We need to finish all async code before the module init sequence is
done.  In the reverted commit the PF_USED_ASYNC flag was added to mark a
thread that called async_schedule().  Then the PF_USED_ASYNC flag was
used to determine whether or not async_synchronize_full() needs to be
invoked.  This works when modprobe thread is calling async_schedule(),
but it does not work if module dispatches init code to a worker thread
which then calls async_schedule().

For example, PCI driver probing is invoked from a worker thread based on
a node where device is attached:

	if (cpu < nr_cpu_ids)
		error = work_on_cpu(cpu, local_pci_probe, &ddi);
	else
		error = local_pci_probe(&ddi);

We end up in a situation where a worker thread gets the PF_USED_ASYNC
flag set instead of the modprobe thread.  As a result,
async_synchronize_full() is not invoked and modprobe completes without
waiting for the async code to finish.

The issue was discovered while loading the pm80xx driver:
(scsi_mod.scan=async)

modprobe pm80xx                      worker
...
  do_init_module()
  ...
    pci_call_probe()
      work_on_cpu(local_pci_probe)
                                     local_pci_probe()
                                       pm8001_pci_probe()
                                         scsi_scan_host()
                                           async_schedule()
                                           worker->flags |= PF_USED_ASYNC;
                                     ...
      < return from worker >
  ...
  if (current->flags & PF_USED_ASYNC) <--- false
  	async_synchronize_full();

Commit 21c3c5d280 ("block: don't request module during elevator init")
fixed the deadlock issue which the reverted commit 774a1221e8
("module, async: async_synchronize_full() on module init iff async is
used") tried to fix.

Since commit 0fdff3ec6d ("async, kmod: warn on synchronous
request_module() from async workers") synchronous module loading from
async is not allowed.

Given that the original deadlock issue is fixed and it is no longer
allowed to call synchronous request_module() from async we can remove
PF_USED_ASYNC flag to make module init consistently invoke
async_synchronize_full() unless async module probe is requested.

Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Reviewed-by: Changyuan Lyu <changyuanl@google.com>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-02-03 11:20:34 -08:00
Linus Torvalds
305e6c42e8 Merge branch 'for-5.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:

 - Eric's fix for a long standing cgroup1 permission issue where it only
   checks for uid 0 instead of CAP which inadvertently allows
   unprivileged userns roots to modify release_agent userhelper

 - Fixes for the fallout from Waiman's recent cpuset work

* 'for-5.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup/cpuset: Fix "suspicious RCU usage" lockdep warning
  cgroup-v1: Require capabilities to set release_agent
  cpuset: Fix the bug that subpart_cpus updated wrongly in update_cpumask()
  cgroup/cpuset: Make child cpusets restrict parents on v1 hierarchy
2022-02-03 08:15:13 -08:00
Waiman Long
2bdfd2825c cgroup/cpuset: Fix "suspicious RCU usage" lockdep warning
It was found that a "suspicious RCU usage" lockdep warning was issued
with the rcu_read_lock() call in update_sibling_cpumasks().  It is
because the update_cpumasks_hier() function may sleep. So we have
to release the RCU lock, call update_cpumasks_hier() and reacquire
it afterward.

Also add a percpu_rwsem_assert_held() in update_sibling_cpumasks()
instead of stating that in the comment.

Fixes: 4716909cc5 ("cpuset: Track cpusets that use parent's effective_cpus")
Signed-off-by: Waiman Long <longman@redhat.com>
Tested-by: Phil Auld <pauld@redhat.com>
Reviewed-by: Phil Auld <pauld@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2022-02-03 05:59:01 -10:00
Hou Tao
b293dcc473 bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
After commit 2fd3fb0be1d1 ("kasan, vmalloc: unpoison VM_ALLOC pages
after mapping"), non-VM_ALLOC mappings will be marked as accessible
in __get_vm_area_node() when KASAN is enabled. But now the flag for
ringbuf area is VM_ALLOC, so KASAN will complain out-of-bound access
after vmap() returns. Because the ringbuf area is created by mapping
allocated pages, so use VM_MAP instead.

After the change, info in /proc/vmallocinfo also changes from
  [start]-[end]   24576 ringbuf_map_alloc+0x171/0x290 vmalloc user
to
  [start]-[end]   24576 ringbuf_map_alloc+0x171/0x290 vmap user

Fixes: 457f44363a ("bpf: Implement BPF ring buffer and verifier support for it")
Reported-by: syzbot+5ad567a418794b9b5983@syzkaller.appspotmail.com
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220202060158.6260-1-houtao1@huawei.com
2022-02-02 23:15:24 -08:00
Marco Elver
3c25fc97f5 perf: Copy perf_event_attr::sig_data on modification
The intent has always been that perf_event_attr::sig_data should also be
modifiable along with PERF_EVENT_IOC_MODIFY_ATTRIBUTES, because it is
observable by user space if SIGTRAP on events is requested.

Currently only PERF_TYPE_BREAKPOINT is modifiable, and explicitly copies
relevant breakpoint-related attributes in hw_breakpoint_copy_attr().
This misses copying perf_event_attr::sig_data.

Since sig_data is not specific to PERF_TYPE_BREAKPOINT, introduce a
helper to copy generic event-type-independent attributes on
modification.

Fixes: 97ba62b278 ("perf: Add support for SIGTRAP on perf events")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Link: https://lore.kernel.org/r/20220131103407.1971678-1-elver@google.com
2022-02-02 13:11:40 +01:00
Alexei Starovoitov
e96f2d64c8 bpf: Drop libbpf, libelf, libz dependency from bpf preload.
Drop libbpf, libelf, libz dependency from bpf preload.
This reduces bpf_preload_umd binary size
from 1.7M to 30k unstripped with debug info
and from 300k to 19k stripped.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20220131220528.98088-8-alexei.starovoitov@gmail.com
2022-02-01 23:56:18 +01:00
Alexei Starovoitov
18ef5dac93 bpf: Open code obj_get_info_by_fd in bpf preload.
Open code obj_get_info_by_fd in bpf preload.
It's the last part of libbpf that preload/iterators were using.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20220131220528.98088-7-alexei.starovoitov@gmail.com
2022-02-01 23:56:18 +01:00
Alexei Starovoitov
79b203926d bpf: Convert bpf preload to light skeleton.
Convert bpffs preload iterators to light skeleton.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20220131220528.98088-6-alexei.starovoitov@gmail.com
2022-02-01 23:56:18 +01:00
Alexei Starovoitov
1ddbddd706 bpf: Remove unnecessary setrlimit from bpf preload.
BPF programs and maps are memcg accounted. setrlimit is obsolete.
Remove its use from bpf preload.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20220131220528.98088-5-alexei.starovoitov@gmail.com
2022-02-01 23:56:18 +01:00
Linus Torvalds
61fda95541 audit/stable-5.17 PR 20220131
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Merge tag 'audit-pr-20220131' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

Pull audit fix from Paul Moore:
 "A single audit patch to fix problems relating to audit queuing and
  system responsiveness when "audit=1" is specified on the kernel
  command line and the audit daemon is SIGSTOP'd for an extended period
  of time"

* tag 'audit-pr-20220131' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
  audit: improve audit queue handling when "audit=1" on cmdline
2022-02-01 11:07:09 -08:00
Eric W. Biederman
24f6008564 cgroup-v1: Require capabilities to set release_agent
The cgroup release_agent is called with call_usermodehelper.  The function
call_usermodehelper starts the release_agent with a full set fo capabilities.
Therefore require capabilities when setting the release_agaent.

Reported-by: Tabitha Sable <tabitha.c.sable@gmail.com>
Tested-by: Tabitha Sable <tabitha.c.sable@gmail.com>
Fixes: 81a6a5cdd2 ("Task Control Groups: automatic userspace notification of idle cgroups")
Cc: stable@vger.kernel.org # v2.6.24+
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2022-02-01 07:28:00 -10:00
Kenta Tada
0407a65f35 bpf: make bpf_copy_from_user_task() gpl only
access_process_vm() is exported by EXPORT_SYMBOL_GPL().

Signed-off-by: Kenta Tada <Kenta.Tada@sony.com>
Link: https://lore.kernel.org/r/20220128170906.21154-1-Kenta.Tada@sony.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-01-31 12:44:37 -08:00
Linus Torvalds
27a96c4feb - Prevent accesses to the per-CPU cgroup context list from another CPU
except the one it belongs to, to avoid list corruption
 
 - Make sure parent events are always woken up to avoid indefinite hangs
 in the traced workload
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Merge tag 'perf_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Borislav Petkov:

 - Prevent accesses to the per-CPU cgroup context list from another CPU
   except the one it belongs to, to avoid list corruption

 - Make sure parent events are always woken up to avoid indefinite hangs
   in the traced workload

* tag 'perf_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Fix cgroup event list management
  perf: Always wake the parent event
2022-01-30 15:02:32 +02:00
Linus Torvalds
24f4db1f3a - Make sure the membarrier-rseq fence commands are part of the reported
set when querying membarrier(2) commands through MEMBARRIER_CMD_QUERY
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Merge tag 'sched_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fix from Borislav Petkov:
 "Make sure the membarrier-rseq fence commands are part of the reported
  set when querying membarrier(2) commands through MEMBARRIER_CMD_QUERY"

* tag 'sched_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/membarrier: Fix membarrier-rseq fence command missing from query bitmask
2022-01-30 13:09:00 +02:00
Suren Baghdasaryan
44585f7bc0 psi: fix "defined but not used" warnings when CONFIG_PROC_FS=n
When CONFIG_PROC_FS is disabled psi code generates the following
warnings:

  kernel/sched/psi.c:1364:30: warning: 'psi_cpu_proc_ops' defined but not used [-Wunused-const-variable=]
      1364 | static const struct proc_ops psi_cpu_proc_ops = {
           |                              ^~~~~~~~~~~~~~~~
  kernel/sched/psi.c:1355:30: warning: 'psi_memory_proc_ops' defined but not used [-Wunused-const-variable=]
      1355 | static const struct proc_ops psi_memory_proc_ops = {
           |                              ^~~~~~~~~~~~~~~~~~~
  kernel/sched/psi.c:1346:30: warning: 'psi_io_proc_ops' defined but not used [-Wunused-const-variable=]
      1346 | static const struct proc_ops psi_io_proc_ops = {
           |                              ^~~~~~~~~~~~~~~

Make definitions of these structures and related functions conditional
on CONFIG_PROC_FS config.

Link: https://lkml.kernel.org/r/20220119223940.787748-3-surenb@google.com
Fixes: 0e94682b73 ("psi: introduce psi monitor")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-30 09:56:58 +02:00
Linus Torvalds
a7b4b0076b Power management updates for 5.17-rc2
- Make the buffer handling in pm_show_wakelocks() more robust by
    using sysfs_emit_at() in it to generate output (Greg Kroah-Hartman).
 
  - Drop register_nosave_region_late() which is not used (Amadeusz
    Sławiński).
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Merge tag 'pm-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These make the buffer handling in pm_show_wakelocks() more robust and
  drop an unused hibernation-related function.

  Specifics:

   - Make the buffer handling in pm_show_wakelocks() more robust by
     using sysfs_emit_at() in it to generate output (Greg
     Kroah-Hartman).

   - Drop register_nosave_region_late() which is not used (Amadeusz
     Sławiński)"

* tag 'pm-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM: hibernate: Remove register_nosave_region_late()
  PM: wakeup: simplify the output logic of pm_show_wakelocks()
2022-01-28 20:44:07 +02:00
Linus Torvalds
df0001545b Tracing fixes for 5.17-rc1:
- Limit mcount build time sorting to only those archs that
    we know it works for.
 
  - Fix memory leak in error path of histogram setup
 
  - Fix and clean up rel_loc array out of bounds issue
 
  - tools/rtla documentation fixes
 
  - Fix issues with histogram logic
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Merge tag 'trace-v5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pulltracing fixes from Steven Rostedt:

 - Limit mcount build time sorting to only those archs that we know it
   works for.

 - Fix memory leak in error path of histogram setup

 - Fix and clean up rel_loc array out of bounds issue

 - tools/rtla documentation fixes

 - Fix issues with histogram logic

* tag 'trace-v5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Don't inc err_log entry count if entry allocation fails
  tracing: Propagate is_signed to expression
  tracing: Fix smatch warning for do while check in event_hist_trigger_parse()
  tracing: Fix smatch warning for null glob in event_hist_trigger_parse()
  tools/tracing: Update Makefile to build rtla
  rtla: Make doc build optional
  tracing/perf: Avoid -Warray-bounds warning for __rel_loc macro
  tracing: Avoid -Warray-bounds warning for __rel_loc macro
  tracing/histogram: Fix a potential memory leak for kstrdup()
  ftrace: Have architectures opt-in for mcount build time sorting
2022-01-28 19:30:35 +02:00
Linus Torvalds
76fcbc9c7c Merge branch 'ucount-rlimit-fixes-for-v5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull ucount rlimit fix from Eric Biederman.

Make sure the ucounts have a reference to the user namespace it refers
to, so that users that themselves don't carry such a reference around
can safely use the ucount functions.

* 'ucount-rlimit-fixes-for-v5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  ucount:  Make get_ucount a safe get_user replacement
2022-01-28 19:25:24 +02:00