[PATCH 6.18 043/212] drm/xe/sync: Fix user fence leak on alloc failure

Greg Kroah-Hartman
2026-03-23T14:03:00Z

From: Shuicheng Lin <shuicheng.lin@intel.com>

[ Upstream commit 0879c3f04f67e2a1677c25dcc24669ce21eb6a6c ]

When dma_fence_chain_alloc() fails, properly release the user fence
reference to prevent a memory leak.

Fixes: 0995c2fc39b0 ("drm/xe: Enforce correct user fence signaling order using")
Cc: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Shuicheng Lin <shuicheng.lin@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260219233516.2938172-6-shuicheng.lin@intel.com
(cherry picked from commit a5d5634cde48a9fcd68c8504aa07f89f175074a0)
Cc: stable@vger.kernel.org
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/xe/xe_sync.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/xe/xe_sync.c
+++ b/drivers/gpu/drm/xe/xe_sync.c
@@ -206,8 +206,10 @@ int xe_sync_entry_parse(struct xe_device
if (XE_IOCTL_DBG(xe, IS_ERR(sync->ufence)))
return PTR_ERR(sync->ufence);
sync->ufence_chain_fence = dma_fence_chain_alloc();
- if (!sync->ufence_chain_fence)
- return -ENOMEM;
+ if (!sync->ufence_chain_fence) {
+ err = -ENOMEM;
+ goto free_sync;
+ }
sync->ufence_syncobj = ufence_syncobj;
}