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| author | Song Liu <song@kernel.org> | 2022-02-03 16:40:57 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-16 12:44:52 +0100 |
| commit | 5d76ed4223403f90421782adb2f20a9ecbc93186 (patch) | |
| tree | 79cbc532e56529b79a041138f19a9d1afaf0aa67 /lib/list_debug.c | |
| parent | 83e80414c8b8289e4d2099a1be20363b63a3e63d (diff) | |
perf: Fix list corruption in perf_cgroup_switch()
commit 5f4e5ce638e6a490b976ade4a40017b40abb2da0 upstream.
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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/list_debug.c')
0 files changed, 0 insertions, 0 deletions