[PATCH] drm/amdkfd: Fix file reference leak in criu_restore_devices()

[Wentao Liang]

In criu_restore_devices(), drm_file is obtained using fget(drm_fd). If
pdd->drm_file is already set, the function returns -EINVAL without
releasing the acquired reference via fput(drm_file), leading to a file
reference count leak.

Fix this by adding fput(drm_file) before returning -EINVAL.

Fixes: bef153b70c6e ("drm/amdkfd: CRIU implement gpu_id remapping")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 03b266b26738..5453fa4ce4fd 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -2311,6 +2311,7 @@ static int criu_restore_devices(struct kfd_process *p,
 		}
 
 		if (pdd->drm_file) {
+			fput(drm_file);
 			ret = -EINVAL;
 			goto exit;
 		}
-- 
2.34.1