6.13-stable review patch. If anyone has any objections, please let me know.
------------------
From: Su Hui <suhui@xxxxxxxxxxxx>
[ Upstream commit 3b32b7f638fe61e9d29290960172f4e360e38233 ]
'priorities_info' is uninitialized, and the uninitialized value is copied
to user object when calling PANTHOR_UOBJ_SET(). Using memset to initialize
'priorities_info' to avoid this garbage value problem.
Fixes: f70000ef2352 ("drm/panthor: Add DEV_QUERY_GROUP_PRIORITIES_INFO dev query")
Signed-off-by: Su Hui <suhui@xxxxxxxxxxxx>
Reviewed-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Reviewed-by: Steven Price <steven.price@xxxxxxx>
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20250119025828.1168419-1-suhui@xxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/panthor/panthor_drv.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/panthor/panthor_drv.c b/drivers/gpu/drm/panthor/panthor_drv.c
index 0b3fbee3d37a8..44f5c72d46c3f 100644
--- a/drivers/gpu/drm/panthor/panthor_drv.c
+++ b/drivers/gpu/drm/panthor/panthor_drv.c
@@ -802,6 +802,7 @@ static void panthor_query_group_priorities_info(struct drm_file *file,
{
int prio;
+ memset(arg, 0, sizeof(*arg));
for (prio = PANTHOR_GROUP_PRIORITY_REALTIME; prio >= 0; prio--) {
if (!group_priority_permit(file, prio))
arg->allowed_mask |= BIT(prio);
--
2.39.5
