This is a note to let you know that I've just added the patch titled
perf/core: Fix potential NULL deref
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-core-fix-potential-null-deref.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a71ef31485bb51b846e8db8b3a35e432cc15afb5 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Tue, 24 Oct 2023 11:42:21 +0200
Subject: perf/core: Fix potential NULL deref
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
commit a71ef31485bb51b846e8db8b3a35e432cc15afb5 upstream.
Smatch is awesome.
Fixes: 32671e3799ca ("perf: Disallow mis-matched inherited group reads")
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/events/core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -11629,7 +11629,8 @@ static int inherit_group(struct perf_eve
if (IS_ERR(child_ctr))
return PTR_ERR(child_ctr);
}
- leader->group_generation = parent_event->group_generation;
+ if (leader)
+ leader->group_generation = parent_event->group_generation;
return 0;
}
Patches currently in stable-queue which might be from peterz@xxxxxxxxxxxxx are
queue-4.19/perf-core-fix-potential-null-deref.patch
