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

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[ Upstream commit ebbb7bb9e8 ]

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>
This commit is contained in:
QintaoShen 2022-03-24 16:26:23 +08:00 • committed by Greg Kroah-Hartman
commit 1d7a5aae88
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/amd/amdkfd/kfd_events.c
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@ -531,6 +531,8 @@ 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);