Commit 94869bb0 authored Mar 24, 2022 by QintaoShen Committed by Greg Kroah-Hartman Apr 20, 2022

drm/amdkfd: Check for potential null return of kmalloc_array()



[ Upstream commit ebbb7bb9e80305820dc2328a371c1b35679f2667 ]

As the kmalloc_array() may return null, the 'event_waiters[i].wait' would lead to null-pointer dereference.
Therefore, it is better to check the return value of kmalloc_array() to avoid this confusion.

Signed-off-by: QintaoShen <unSimple1993@163.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent ce07ef07

drivers/gpu/drm/amd/amdkfd/kfd_events.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -532,6 +532,8 @@ static struct kfd_event_waiter *alloc_event_waiters(uint32_t num_events)
		event_waiters = kmalloc_array(num_events,
		sizeof(struct kfd_event_waiter),
		GFP_KERNEL);
		if (!event_waiters)
		return NULL;

		for (i = 0; (event_waiters) && (i < num_events) ; i++) {
		init_wait(&event_waiters[i].wait);