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authorToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>2013-11-13 17:26:14 +0900
committerDavid S. Miller <davem@davemloft.net>2013-11-14 16:16:34 -0500
commitb4e09b29c73e3bf09be1652bbf19585a2363a10a (patch)
tree5bf00622c9996c07da7649f208ad925938d73075
parentdbbaf949bcd0ffb8b17cf0438060d55d6cfb8a4b (diff)
bridge: Fix memory leak when deleting bridge with vlan filtering enabled
We currently don't call br_vlan_flush() when deleting a bridge, which leads to memory leak if br->vlan_info is allocated. Steps to reproduce: while : do brctl addbr br0 bridge vlan add dev br0 vid 10 self brctl delbr br0 done We can observe the cache size of corresponding slab entry (as kmalloc-2048 in SLUB) is increased. kmemleak output: unreferenced object 0xffff8800b68a7000 (size 2048): comm "bridge", pid 2086, jiffies 4295774704 (age 47.656s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 48 9b 36 00 88 ff ff .........H.6.... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff815eb6ae>] kmemleak_alloc+0x4e/0xb0 [<ffffffff8116a1ca>] kmem_cache_alloc_trace+0xca/0x220 [<ffffffffa03eddd6>] br_vlan_add+0x66/0xe0 [bridge] [<ffffffffa03e543c>] br_setlink+0x2dc/0x340 [bridge] [<ffffffff8150e481>] rtnl_bridge_setlink+0x101/0x200 [<ffffffff8150d9d9>] rtnetlink_rcv_msg+0x99/0x260 [<ffffffff81528679>] netlink_rcv_skb+0xa9/0xc0 [<ffffffff8150d938>] rtnetlink_rcv+0x28/0x30 [<ffffffff81527ccd>] netlink_unicast+0xdd/0x190 [<ffffffff8152807f>] netlink_sendmsg+0x2ff/0x740 [<ffffffff814e8368>] sock_sendmsg+0x88/0xc0 [<ffffffff814e8ac8>] ___sys_sendmsg.part.14+0x298/0x2b0 [<ffffffff814e91de>] __sys_sendmsg+0x4e/0x90 [<ffffffff814e922e>] SyS_sendmsg+0xe/0x10 [<ffffffff81601669>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/bridge/br_if.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index c41d5fbb91d0..6e6194fcd88e 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -172,6 +172,7 @@ void br_dev_delete(struct net_device *dev, struct list_head *head)
del_nbp(p);
}
+ br_vlan_flush(br);
del_timer_sync(&br->gc_timer);
br_sysfs_delbr(br->dev);