diff options
| author | Ding Tianhong <dingtianhong@huawei.com> | 2013-12-07 22:12:05 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 07:29:14 -0800 |
| commit | 4af9d8887f6540abd355e2068af171f5400fccbf (patch) | |
| tree | 170987770443bf3aff3b602c392a559284fd8af5 /net/bridge | |
| parent | a6ec437be3d70e9ba85fb34941a96577dcbb8414 (diff) | |
bridge: flush br's address entry in fdb when remove the bridge dev
[ Upstream commit f873042093c0b418d2351fe142222b625c740149 ]
When the following commands are executed:
brctl addbr br0
ifconfig br0 hw ether <addr>
rmmod bridge
The calltrace will occur:
[ 563.312114] device eth1 left promiscuous mode
[ 563.312188] br0: port 1(eth1) entered disabled state
[ 563.468190] kmem_cache_destroy bridge_fdb_cache: Slab cache still has objects
[ 563.468197] CPU: 6 PID: 6982 Comm: rmmod Tainted: G O 3.12.0-0.7-default+ #9
[ 563.468199] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[ 563.468200] 0000000000000880 ffff88010f111e98 ffffffff814d1c92 ffff88010f111eb8
[ 563.468204] ffffffff81148efd ffff88010f111eb8 0000000000000000 ffff88010f111ec8
[ 563.468206] ffffffffa062a270 ffff88010f111ed8 ffffffffa063ac76 ffff88010f111f78
[ 563.468209] Call Trace:
[ 563.468218] [<ffffffff814d1c92>] dump_stack+0x6a/0x78
[ 563.468234] [<ffffffff81148efd>] kmem_cache_destroy+0xfd/0x100
[ 563.468242] [<ffffffffa062a270>] br_fdb_fini+0x10/0x20 [bridge]
[ 563.468247] [<ffffffffa063ac76>] br_deinit+0x4e/0x50 [bridge]
[ 563.468254] [<ffffffff810c7dc9>] SyS_delete_module+0x199/0x2b0
[ 563.468259] [<ffffffff814e0922>] system_call_fastpath+0x16/0x1b
[ 570.377958] Bridge firewalling registered
--------------------------- cut here -------------------------------
The reason is that when the bridge dev's address is changed, the
br_fdb_change_mac_address() will add new address in fdb, but when
the bridge was removed, the address entry in the fdb did not free,
the bridge_fdb_cache still has objects when destroy the cache, Fix
this by flushing the bridge address entry when removing the bridge.
v2: according to the Toshiaki Makita and Vlad's suggestion, I only
delete the vlan0 entry, it still have a leak here if the vlan id
is other number, so I need to call fdb_delete_by_port(br, NULL, 1)
to flush all entries whose dst is NULL for the bridge.
Suggested-by: Toshiaki Makita <toshiaki.makita1@gmail.com>
Suggested-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/bridge')
| -rw-r--r-- | net/bridge/br_if.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index c41d5fbb91d..547504ccba6 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -172,6 +172,8 @@ void br_dev_delete(struct net_device *dev, struct list_head *head) del_nbp(p); } + br_fdb_delete_by_port(br, NULL, 1); + del_timer_sync(&br->gc_timer); br_sysfs_delbr(br->dev); |