This is a note to let you know that I've just added the patch titled
net: check vlan filter feature in vlan_vids_add_by_dev() and vlan_vids_del_by_dev()
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-check-vlan-filter-feature-in-vlan_vids_add_by_de.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f87a74362d97119bc5f47e0717b2d5bac3b31de8
Author: Liu Jian <liujian56@xxxxxxxxxx>
Date: Sat Dec 16 15:52:18 2023 +0800
net: check vlan filter feature in vlan_vids_add_by_dev() and vlan_vids_del_by_dev()
[ Upstream commit 01a564bab4876007ce35f312e16797dfe40e4823 ]
I got the below warning trace:
WARNING: CPU: 4 PID: 4056 at net/core/dev.c:11066 unregister_netdevice_many_notify
CPU: 4 PID: 4056 Comm: ip Not tainted 6.7.0-rc4+ #15
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014
RIP: 0010:unregister_netdevice_many_notify+0x9a4/0x9b0
Call Trace:
rtnl_dellink
rtnetlink_rcv_msg
netlink_rcv_skb
netlink_unicast
netlink_sendmsg
__sock_sendmsg
____sys_sendmsg
___sys_sendmsg
__sys_sendmsg
do_syscall_64
entry_SYSCALL_64_after_hwframe
It can be repoduced via:
ip netns add ns1
ip netns exec ns1 ip link add bond0 type bond mode 0
ip netns exec ns1 ip link add bond_slave_1 type veth peer veth2
ip netns exec ns1 ip link set bond_slave_1 master bond0
[1] ip netns exec ns1 ethtool -K bond0 rx-vlan-filter off
[2] ip netns exec ns1 ip link add link bond_slave_1 name bond_slave_1.0 type vlan id 0
[3] ip netns exec ns1 ip link add link bond0 name bond0.0 type vlan id 0
[4] ip netns exec ns1 ip link set bond_slave_1 nomaster
[5] ip netns exec ns1 ip link del veth2
ip netns del ns1
This is all caused by command [1] turning off the rx-vlan-filter function
of bond0. The reason is the same as commit 01f4fd270870 ("bonding: Fix
incorrect deletion of ETH_P_8021AD protocol vid from slaves"). Commands
[2] [3] add the same vid to slave and master respectively, causing
command [4] to empty slave->vlan_info. The following command [5] triggers
this problem.
To fix this problem, we should add VLAN_FILTER feature checks in
vlan_vids_add_by_dev() and vlan_vids_del_by_dev() to prevent incorrect
addition or deletion of vlan_vid information.
Fixes: 348a1443cc43 ("vlan: introduce functions to do mass addition/deletion of vids by another device")
Signed-off-by: Liu Jian <liujian56@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 0beb44f2fe1f0..f001582345052 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -407,6 +407,8 @@ int vlan_vids_add_by_dev(struct net_device *dev,
return 0;
list_for_each_entry(vid_info, &vlan_info->vid_list, list) {
+ if (!vlan_hw_filter_capable(by_dev, vid_info->proto))
+ continue;
err = vlan_vid_add(dev, vid_info->proto, vid_info->vid);
if (err)
goto unwind;
@@ -417,6 +419,8 @@ int vlan_vids_add_by_dev(struct net_device *dev,
list_for_each_entry_continue_reverse(vid_info,
&vlan_info->vid_list,
list) {
+ if (!vlan_hw_filter_capable(by_dev, vid_info->proto))
+ continue;
vlan_vid_del(dev, vid_info->proto, vid_info->vid);
}
@@ -436,8 +440,11 @@ void vlan_vids_del_by_dev(struct net_device *dev,
if (!vlan_info)
return;
- list_for_each_entry(vid_info, &vlan_info->vid_list, list)
+ list_for_each_entry(vid_info, &vlan_info->vid_list, list) {
+ if (!vlan_hw_filter_capable(by_dev, vid_info->proto))
+ continue;
vlan_vid_del(dev, vid_info->proto, vid_info->vid);
+ }
}
EXPORT_SYMBOL(vlan_vids_del_by_dev);
