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linux/net/bridge
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Cong Wang c7e8e8a8f7 bridge: fix some kernel warning in multicast timer 
Several people reported the warning: "kernel BUG at kernel/timer.c:729!"
and the stack trace is:

	#7 [ffff880214d25c10] mod_timer+501 at ffffffff8106d905
	#8 [ffff880214d25c50] br_multicast_del_pg.isra.20+261 at ffffffffa0731d25 [bridge]
	#9 [ffff880214d25c80] br_multicast_disable_port+88 at ffffffffa0732948 [bridge]
	#10 [ffff880214d25cb0] br_stp_disable_port+154 at ffffffffa072bcca [bridge]
	#11 [ffff880214d25ce8] br_device_event+520 at ffffffffa072a4e8 [bridge]
	#12 [ffff880214d25d18] notifier_call_chain+76 at ffffffff8164aafc
	#13 [ffff880214d25d50] raw_notifier_call_chain+22 at ffffffff810858f6
	#14 [ffff880214d25d60] call_netdevice_notifiers+45 at ffffffff81536aad
	#15 [ffff880214d25d80] dev_close_many+183 at ffffffff81536d17
	#16 [ffff880214d25dc0] rollback_registered_many+168 at ffffffff81537f68
	#17 [ffff880214d25de8] rollback_registered+49 at ffffffff81538101
	#18 [ffff880214d25e10] unregister_netdevice_queue+72 at ffffffff815390d8
	#19 [ffff880214d25e30] __tun_detach+272 at ffffffffa074c2f0 [tun]
	#20 [ffff880214d25e88] tun_chr_close+45 at ffffffffa074c4bd [tun]
	#21 [ffff880214d25ea8] __fput+225 at ffffffff8119b1f1
	#22 [ffff880214d25ef0] ____fput+14 at ffffffff8119b3fe
	#23 [ffff880214d25f00] task_work_run+159 at ffffffff8107cf7f
	#24 [ffff880214d25f30] do_notify_resume+97 at ffffffff810139e1
	#25 [ffff880214d25f50] int_signal+18 at ffffffff8164f292

this is due to I forgot to check if mp->timer is armed in
br_multicast_del_pg(). This bug is introduced by
commit 9f00b2e7cf (bridge: only expire the mdb entry
when query is received).

Same for __br_mdb_del().

Tested-by: poma <pomidorabelisima@gmail.com>
Reported-by: LiYonghua <809674045@qq.com>
Reported-by: Robert Hancock <hancockrwd@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-06 18:12:47 -07:00
..
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2013-06-06 01:03:06 -07:00
br_device.c bridge: Add a flag to control unicast packet flood. 2013-06-11 02:04:32 -07:00
br_fdb.c bridge: check for zero ether address in fdb add 2013-06-25 16:59:27 -07:00
br_forward.c bridge: Add a flag to control unicast packet flood. 2013-06-11 02:04:32 -07:00
br_if.c bridge: Add a flag to control unicast packet flood. 2013-06-11 02:04:32 -07:00
br_input.c bridge: Add a flag to control unicast packet flood. 2013-06-11 02:04:32 -07:00
br_ioctl.c
br_mdb.c bridge: fix some kernel warning in multicast timer 2013-07-06 18:12:47 -07:00
br_multicast.c bridge: fix some kernel warning in multicast timer 2013-07-06 18:12:47 -07:00
br_netfilter.c net: Convert uses of typedef ctl_table to struct ctl_table 2013-06-13 02:36:09 -07:00
br_netlink.c bridge: Add a flag to control unicast packet flood. 2013-06-11 02:04:32 -07:00
br_notify.c net: pass info struct via netdevice notifier 2013-05-28 13:11:01 -07:00
br_private_stp.h
br_private.h bridge: Add a flag to control unicast packet flood. 2013-06-11 02:04:32 -07:00
br_stp_bpdu.c
br_stp_if.c
br_stp_timer.c
br_stp.c
br_sysfs_br.c
br_sysfs_if.c bridge: Add a flag to control unicast packet flood. 2013-06-11 02:04:32 -07:00
br_vlan.c
br.c
Kconfig
Makefile