]> git.proxmox.com Git - mirror_ubuntu-disco-kernel.git/commit
bridge: fix crash when set mac address of br interface
authorHong zhi guo <honkiko@gmail.com>
Sat, 23 Mar 2013 02:27:50 +0000 (02:27 +0000)
committerDavid S. Miller <davem@davemloft.net>
Sun, 24 Mar 2013 21:27:28 +0000 (17:27 -0400)
commit9b46922e15f4d9d2aedcd320c3b7f7f54d956da7
tree3fd73d6097682ac338c6f78981dbc19f7a8a4825
parent4a7df340ed1bac190c124c1601bfc10cde9fb4fb
bridge: fix crash when set mac address of br interface

When I tried to set mac address of a bridge interface to a mac
address which already learned on this bridge, I got system hang.

The cause is straight forward: function br_fdb_change_mac_address
calls fdb_insert with NULL source nbp. Then an fdb lookup is
performed. If an fdb entry is found and it's local, it's OK. But
if it's not local, source is dereferenced for printk without NULL
check.

Signed-off-by: Hong Zhiguo <honkiko@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/bridge/br_fdb.c