Unverified Commit 539cf90d authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!4014 drm/dp_mst: Fix NULL deref in get_mst_branch_device_by_guid_helper() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Baogen Shang <baogen.shang@outlook.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/B4J6O6LWC5A2ZIXQMSQ4NFTLTU2WNGQS/ 
 
https://gitee.com/openeuler/kernel/issues/I8AS5P 
 
Link:https://gitee.com/openeuler/kernel/pulls/4014

 

Reviewed-by: default avatarsanglipeng <sanglipeng1@jd.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents 1b7d9c6c ffd29abb

drivers/gpu/drm/drm_dp_mst_topology.c

+3 −3
Original line number Diff line number Diff line
@@ -2612,14 +2612,14 @@ static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper( 
	struct drm_dp_mst_branch *found_mstb;

	struct drm_dp_mst_port *port;



	if (!mstb)

		return NULL;



	if (memcmp(mstb->guid, guid, 16) == 0)

		return mstb;





	list_for_each_entry(port, &mstb->ports, next) {

		if (!port->mstb)

			continue;



		found_mstb = get_mst_branch_device_by_guid_helper(port->mstb, guid);



		if (found_mstb)