diff options
| author | qianyi liu <liuqianyi125@gmail.com> | 2025-03-11 09:02:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-29 00:04:57 +0300 |
| commit | 35399c84dcedd6d31448fb9e1336ef52673f2882 (patch) | |
| tree | d1687bdb9a94bcea5f39bf1d690fafac00955694 | |
| parent | f5e049028124f755283f2c07e7a3708361ed1dc8 (diff) | |
| download | linux-35399c84dcedd6d31448fb9e1336ef52673f2882.tar.xz | |
drm/sched: Fix fence reference count leak
commit a952f1ab696873be124e31ce5ef964d36bce817f upstream.
The last_scheduled fence leaks when an entity is being killed and adding
the cleanup callback fails.
Decrement the reference count of prev when dma_fence_add_callback()
fails, ensuring proper balance.
Cc: stable@vger.kernel.org # v6.2+
[phasta: add git tag info for stable kernel]
Fixes: 2fdb8a8f07c2 ("drm/scheduler: rework entity flush, kill and fini")
Signed-off-by: qianyi liu <liuqianyi125@gmail.com>
Signed-off-by: Philipp Stanner <phasta@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250311060251.4041101-1-liuqianyi125@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/scheduler/sched_entity.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c index 69bcf0e99d57..da00572d7d42 100644 --- a/drivers/gpu/drm/scheduler/sched_entity.c +++ b/drivers/gpu/drm/scheduler/sched_entity.c @@ -259,9 +259,16 @@ static void drm_sched_entity_kill(struct drm_sched_entity *entity) struct drm_sched_fence *s_fence = job->s_fence; dma_fence_get(&s_fence->finished); - if (!prev || dma_fence_add_callback(prev, &job->finish_cb, - drm_sched_entity_kill_jobs_cb)) + if (!prev || + dma_fence_add_callback(prev, &job->finish_cb, + drm_sched_entity_kill_jobs_cb)) { + /* + * Adding callback above failed. + * dma_fence_put() checks for NULL. + */ + dma_fence_put(prev); drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb); + } prev = &s_fence->finished; } |