diff options
| author | Nikolay Aleksandrov <nikolay@cumulusnetworks.com> | 2019-07-29 12:28:41 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-07-29 09:50:05 -0700 |
| commit | d7bae09fa008c6c9a489580db0a5a12063b97f97 (patch) | |
| tree | de2cdab15d1c67e21c0e1ec79f5c0cd1349c0be7 /net | |
| parent | 051c7b39be4a91f6b7d8c4548444e4b850f1f56c (diff) | |
| download | linux-0-day-d7bae09fa008c6c9a489580db0a5a12063b97f97.tar.gz linux-0-day-d7bae09fa008c6c9a489580db0a5a12063b97f97.tar.xz | |
net: bridge: delete local fdb on device init failure
On initialization failure we have to delete the local fdb which was
inserted due to the default pvid creation. This problem has been present
since the inception of default_pvid. Note that currently there are 2 cases:
1) in br_dev_init() when br_multicast_init() fails
2) if register_netdevice() fails after calling ndo_init()
This patch takes care of both since br_vlan_flush() is called on both
occasions. Also the new fdb delete would be a no-op on normal bridge
device destruction since the local fdb would've been already flushed by
br_dev_delete(). This is not an issue for ports since nbp_vlan_init() is
called last when adding a port thus nothing can fail after it.
Reported-by: syzbot+88533dc8b582309bf3ee@syzkaller.appspotmail.com
Fixes: 5be5a2df40f0 ("bridge: Add filtering support for default_pvid")
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bridge/br_vlan.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 021cc9f66804d..a544e161c7fa3 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -715,6 +715,11 @@ void br_vlan_flush(struct net_bridge *br) ASSERT_RTNL(); + /* delete auto-added default pvid local fdb before flushing vlans + * otherwise it will be leaked on bridge device init failure + */ + br_fdb_delete_by_port(br, NULL, 0, 1); + vg = br_vlan_group(br); __vlan_flush(vg); RCU_INIT_POINTER(br->vlgrp, NULL); |