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: 058fe1c0440e ("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

..

callchain.c

uaccess: add force_uaccess_{begin,end} helpers

2020-08-12 10:57:59 -07:00

core.c

perf: Fix list corruption in perf_cgroup_switch()

2022-02-06 22:37:27 +01:00

hw_breakpoint.c

perf/hw_breakpoint: Replace deprecated CPU-hotplug functions

2021-08-26 09:14:36 +02:00

internal.h

tracing/perf: Add interrupt_context_level() helper

2021-10-19 20:33:20 -04:00

Makefile

perf/core: allow ftrace for functions in kernel/event/core.c

2021-10-25 22:50:42 -04:00

ring_buffer.c

perf: Cap allocation order at aux_watermark

2021-04-16 16:32:39 +02:00

uprobes.c

mm/memcg: Convert mem_cgroup_charge() to take a folio

2021-09-27 09:27:31 -04:00