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UPSTREAM: perf/core: Fix potential NULL deref

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commit a71ef31485bb51b846e8db8b3a35e432cc15afb5 upstream.

Smatch is awesome.

Fixes: 32671e3799ca ("perf: Disallow mis-matched inherited group reads")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 511f3e9bbb)
Change-Id: I6d2005d6c186cfc7ff41ed2615e37ee9f01da6a5
Bug: 442358987
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Peter Zijlstra 2023-10-24 11:42:21 +02:00 • committed by Greg Kroah-Hartman
commit dd8b17eff1
1 changed files with 2 additions and 1 deletions
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3
kernel/events/core.c
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@ -12115,7 +12115,8 @@ static int inherit_group(struct perf_event *parent_event,
!perf_get_aux_event(child_ctr, leader))
return -EINVAL;
}
leader->group_generation = parent_event->group_generation;
if (leader)
leader->group_generation = parent_event->group_generation;
return 0;
}