diff options
| author | QintaoShen <unSimple1993@163.com> | 2022-03-24 16:26:23 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 09:08:31 +0200 |
| commit | 40bf32dbfef866c83a3e74800b81d79e52b6d20b (patch) | |
| tree | eba3c722e09b45bc62cc5d6071a9ff10bfc40366 | |
| parent | 47416843bb571ea37ee7eb5d5f6a2e4af956343a (diff) | |
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>
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_events.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c index 944abfad39c1..1d8dd81dfc70 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c @@ -607,6 +607,8 @@ 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_LIST_HEAD(&event_waiters[i].waiters); |