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perf/core: Fix potential NULL deref

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commit a71ef31485 upstream.

Smatch is awesome.

Fixes: 32671e3799 ("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>
This commit is contained in:
Peter Zijlstra
2023-11-08 17:30:45 +01:00
committed by Greg Kroah-Hartman
parent 4e3c606afa
commit 0258ca32b0
1 changed files with 2 additions and 1 deletions
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kernel/events/core.c
+2 -1
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@@ -12846,7 +12846,8 @@ 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;
}