From: Cong Wang <amwang@redhat.com>
To: Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>
Subject: A regression introduced by 802.1ad support patches
Date: Sun, 21 Apr 2013 15:43:04 +0800 [thread overview]
Message-ID: <1366530184.23100.6.camel@cr0> (raw)
Hi, Patrick,
Your recent 802.1ad patches causes the following bug. After resetting
HEAD to commit c296289 (Merge branch 'intel'), this bug is not
reproducible any more.
It is pretty easy to reproduce in my KVM guest, just boot the guest and
then shut it down, the following traces will be shown. Although it is
not 100% reproducible, it appears more than 80% times at least.
I am glad to provide any other information if you need, and of course
can test any fix if you want.
[ 86.812073] kmemleak: Found object by alias at 0xffff88006ecc76f0
[ 86.816019] Pid: 739, comm: kworker/u:1 Not tainted 3.9.0-rc5+ #842
[ 86.816019] Call Trace:
[ 86.816019] <IRQ> [<ffffffff81151c58>] find_and_get_object
+0x8c/0xdf
[ 86.816019] [<ffffffff8190e90d>] ? vlan_info_rcu_free+0x33/0x49
[ 86.816019] [<ffffffff81151cbe>] delete_object_full+0x13/0x2f
[ 86.816019] [<ffffffff8194bbb6>] kmemleak_free+0x26/0x45
[ 86.816019] [<ffffffff8113e8c7>] slab_free_hook+0x1e/0x7b
[ 86.816019] [<ffffffff81141c05>] kfree+0xce/0x14b
[ 86.816019] [<ffffffff8190e90d>] vlan_info_rcu_free+0x33/0x49
[ 86.816019] [<ffffffff810d0b0b>] rcu_do_batch+0x261/0x4e7
[ 86.816019] [<ffffffff810a308f>] ? mark_held_locks+0x6d/0x95
[ 86.816019] [<ffffffff8190e8da>] ? __vlan_vid_del+0xa6/0xa6
[ 86.816019] [<ffffffff810d0e99>] __rcu_process_callbacks+0x108/0x133
[ 86.816019] [<ffffffff810d0f09>] rcu_process_callbacks+0x45/0x72
[ 86.816019] [<ffffffff81058163>] __do_softirq+0x133/0x2a3
[ 86.816019] [<ffffffff8105840c>] irq_exit+0x5d/0xa4
[ 86.816019] [<ffffffff81983751>] smp_apic_timer_interrupt+0x7c/0x8a
[ 86.816019] [<ffffffff81982832>] apic_timer_interrupt+0x72/0x80
[ 86.816019] <EOI> [<ffffffff8102f3e0>] ? __flush_tlb_all+0x15/0x22
[ 86.816019] [<ffffffff8145b427>] ? clear_page_c+0x7/0x10
[ 86.816019] [<ffffffff81105203>] ? prep_new_page+0x133/0x17f
[ 86.816019] [<ffffffff8110567e>] ? get_page_from_freelist
+0x42f/0x523
[ 86.816019] [<ffffffff811056a6>] get_page_from_freelist+0x457/0x523
[ 86.816019] [<ffffffff810a37b9>] ? lock_is_held+0x56/0x60
[ 86.816019] [<ffffffff811058d6>] __alloc_pages_nodemask+0x164/0x700
[ 86.816019] [<ffffffff81029e91>] ? kvm_clock_read+0x34/0x3b
[ 86.816019] [<ffffffff810852e9>] ? local_clock+0x14/0x4f
[ 86.816019] [<ffffffff81029e91>] ? kvm_clock_read+0x34/0x3b
[ 86.816019] [<ffffffff810852e9>] ? local_clock+0x14/0x4f
[ 86.816019] [<ffffffff810e595b>] ? time_hardirqs_off+0x15/0x2a
[ 86.816019] [<ffffffff8108530b>] ? local_clock+0x36/0x4f
[ 86.816019] [<ffffffff8108530b>] ? local_clock+0x36/0x4f
[ 86.816019] [<ffffffff81139f94>] alloc_pages_current+0xfa/0x11b
[ 86.816019] [<ffffffff811029b6>] __get_free_pages+0x16/0x44
[ 86.816019] [<ffffffff811029fa>] get_zeroed_page+0x16/0x18
[ 86.816019] [<ffffffff81121bd8>] __pud_alloc+0x20/0xa4
[ 86.816019] [<ffffffff81121c74>] pud_alloc+0x18/0x30
[ 86.816019] [<ffffffff81121df2>] handle_mm_fault+0x92/0x264
[ 86.816019] [<ffffffff81122375>] __get_user_pages+0x31d/0x4bb
[ 86.816019] [<ffffffff81154759>] ? do_sync_read+0x6d/0xaa
[ 86.816019] [<ffffffff811225ba>] get_user_pages+0x52/0x54
[ 86.816019] [<ffffffff81159614>] get_arg_page+0x5a/0xc4
[ 86.816019] [<ffffffff81084631>] ? __might_sleep+0xbe/0x19b
[ 86.816019] [<ffffffff811597b1>] copy_strings+0x133/0x210
[ 86.816019] [<ffffffff8115a443>] copy_strings_kernel+0x53/0x61
[ 86.816019] [<ffffffff8115b145>] do_execve_common+0x1c1/0x338
[ 86.816019] [<ffffffff8115b2fc>] do_execve+0x40/0x42
[ 86.816019] [<ffffffff8106844d>] ____call_usermodehelper+0x100/0x11a
[ 86.816019] [<ffffffff81068467>] ? ____call_usermodehelper
+0x11a/0x11a
[ 86.816019] [<ffffffff81068485>] call_helper+0x1e/0x20
[ 86.816019] [<ffffffff81981aec>] ret_from_fork+0x7c/0xb0
[ 86.816019] [<ffffffff81068467>] ? ____call_usermodehelper
+0x11a/0x11a
[ 86.816019] kmemleak: Object 0xffff88006ecc76d0 (size 256):
[ 86.816019] kmemleak: comm "NetworkManager", pid 342, jiffies
4294896763
[ 86.816019] kmemleak: min_count = 1
[ 86.816019] kmemleak: count = 1
[ 86.816019] kmemleak: flags = 0x1
[ 86.816019] kmemleak: checksum = 0
[ 86.816019] kmemleak: backtrace:
[ 86.816019] [<ffffffff8194bae0>] kmemleak_alloc+0x26/0x43
[ 86.816019] [<ffffffff8113e771>] slab_post_alloc_hook+0x28/0x2a
[ 86.816019] [<ffffffff8114183d>] __kmalloc+0x114/0x145
[ 86.816019] [<ffffffff8190e9ea>] kzalloc.constprop.4+0xe/0x10
[ 86.816019] [<ffffffff8190f008>] vlan_vid_add+0x98/0x146
[ 86.816019] [<ffffffff8190f8d1>] vlan_device_event+0xbb/0x3c4
[ 86.816019] [<ffffffff8107896f>] notifier_call_chain+0x96/0xcd
[ 86.816019] [<ffffffff81078d35>] raw_notifier_call_chain
+0x14/0x16
[ 86.816019] [<ffffffff8176e68e>] call_netdevice_notifiers
+0x4a/0x4f
[ 86.816019] [<ffffffff81771aed>] __dev_notify_flags+0x37/0x5b
[ 86.816019] [<ffffffff81771b59>] dev_change_flags+0x48/0x53
[ 86.816019] [<ffffffff8177e743>] do_setlink+0x29e/0x5d6
[ 86.816019] [<ffffffff8177f0d1>] rtnl_newlink+0x257/0x436
[ 86.816019] [<ffffffff8177d80f>] rtnetlink_rcv_msg+0x19c/0x1ab
[ 86.816019] [<ffffffff817c5a1f>] netlink_rcv_skb+0x42/0x8d
[ 86.816019] [<ffffffff8177d655>] rtnetlink_rcv+0x26/0x2d
<..........More traces are snipped here...........>
Thanks!
next reply other threads:[~2013-04-21 7:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-21 7:43 Cong Wang [this message]
2013-04-21 9:34 ` A regression introduced by 802.1ad support patches Patrick McHardy
2013-04-21 9:49 ` Cong Wang
2013-04-21 19:56 ` David Miller
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