Commit dd8b17ef authored Oct 24, 2023 by Peter Zijlstra Committed by Greg Kroah-Hartman Sep 02, 2025

UPSTREAM: 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>
(cherry picked from commit 511f3e9b)
Change-Id: I6d2005d6c186cfc7ff41ed2615e37ee9f01da6a5
Bug: 442358987
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

parent b7a9bb08

kernel/events/core.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -12115,6 +12115,7 @@ static int inherit_group(struct perf_event *parent_event,
		!perf_get_aux_event(child_ctr, leader))
		return -EINVAL;
		}
		if (leader)
		leader->group_generation = parent_event->group_generation;
		return 0;
		}