This is a note to let you know that I've just added the patch titled

8021q: fix a memory leak for VLAN 0 device

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: 8021q-fix-a-memory-leak-for-vlan-0-device.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Sat Jan 13 10:51:05 CET 2018

From: Cong Wang xiyou.wangcong@gmail.com Date: Tue, 9 Jan 2018 13:40:41 -0800 Subject: 8021q: fix a memory leak for VLAN 0 device

From: Cong Wang xiyou.wangcong@gmail.com

[ Upstream commit 78bbb15f2239bc8e663aa20bbe1987c91a0b75f6 ]

A vlan device with vid 0 is allow to creat by not able to be fully cleaned up by unregister_vlan_dev() which checks for vlan_id!=0.

Also, VLAN 0 is probably not a valid number and it is kinda "reserved" for HW accelerating devices, but it is probably too late to reject it from creation even if makes sense. Instead, just remove the check in unregister_vlan_dev().

Reported-by: Dmitry Vyukov dvyukov@google.com Fixes: ad1afb003939 ("vlan_dev: VLAN 0 should be treated as "no vlan tag" (802.1p packet)") Cc: Vlad Yasevich vyasevich@gmail.com Cc: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Cong Wang xiyou.wangcong@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/8021q/vlan.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)

--- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -111,12 +111,7 @@ void unregister_vlan_dev(struct net_devi vlan_gvrp_uninit_applicant(real_dev); }

- /* Take it out of our own structures, but be sure to interlock with - * HW accelerating devices or SW vlan input packet processing if - * VLAN is not 0 (leave it there for 802.1p). - */ - if (vlan_id) - vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); + vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);

/* Get rid of the vlan's reference to real_dev */ dev_put(real_dev);

Patches currently in stable-queue which might be from xiyou.wangcong@gmail.com are

queue-4.14/8021q-fix-a-memory-leak-for-vlan-0-device.patch