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| author | Peter Zijlstra <peterz@infradead.org> | 2023-10-24 11:42:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-02 09:36:59 +0100 |
| commit | 51617780599746f507f46398d583c3ec3b83e07f (patch) | |
| tree | 6fe50bd838bae5a3c14a289afd78360cd9f9ff81 | |
| parent | 25de47d0d6e740b230813c3e1381c6d0f4306b81 (diff) | |
| download | linux-51617780599746f507f46398d583c3ec3b83e07f.tar.gz linux-51617780599746f507f46398d583c3ec3b83e07f.tar.bz2 linux-51617780599746f507f46398d583c3ec3b83e07f.zip | |
perf/core: Fix potential NULL deref
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>
| -rw-r--r-- | kernel/events/core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index b3d800738fc5..f2f4d2b3beee 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -13383,7 +13383,8 @@ 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; } |