This is a note to let you know that I've just added the patch titled
drm/msm: Disallow submit with fence id 0
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-msm-disallow-submit-with-fence-id-0.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2b2360b2defa768b785544bc1a12c56e5d84b9a6
Author: Rob Clark <robdclark@xxxxxxxxxxxx>
Date: Mon Jul 24 13:30:21 2023 -0700
drm/msm: Disallow submit with fence id 0
[ Upstream commit 1b5d0ddcb34a605835051ae2950d5cfed0373dd8 ]
A fence id of zero is expected to be invalid, and is not removed from
the fence_idr table. If userspace is requesting to specify the fence
id with the FENCE_SN_IN flag, we need to reject a zero fence id value.
Fixes: 17154addc5c1 ("drm/msm: Add MSM_SUBMIT_FENCE_SN_IN")
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/549180/
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 5668860f01827..c12a6ac2d3840 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -875,7 +875,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
* after the job is armed
*/
if ((args->flags & MSM_SUBMIT_FENCE_SN_IN) &&
- idr_find(&queue->fence_idr, args->fence)) {
+ (!args->fence || idr_find(&queue->fence_idr, args->fence))) {
spin_unlock(&queue->idr_lock);
ret = -EINVAL;
goto out;
