[PATCH] drm/panthor: avoid garbage value in panthor_ioctl_dev_query()

[Su Hui]

'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 at nfschina.com>
---
 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 0b3fbee3d37a..44f5c72d46c3 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);
-- 
2.30.2