From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 67751] Stack trace with suspicious RCU usage, when starting ovs-switchd
Date: Fri, 27 Dec 2013 13:56:35 +0000 [thread overview]
Message-ID: <bug-67751-28872-etqPpyYQvA@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-67751-28872@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=67751
Kashyap Chamarthy <kashyap.cv@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Kernel Version|3.13-rc4 |3.13.0-0.rc4.git5.1.fc21.x8
| |6_64
--- Comment #1 from Kashyap Chamarthy <kashyap.cv@gmail.com> ---
Just to note this is reproducible, I ran into it again when I booted the VM
through its serial console:
---------------------
.
.
.
[ OK ] Started RPC bind service.
[ 23.707895] nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
[ 24.460881] gre: GRE over IPv4 demultiplexor driver
[ 24.534446] openvswitch: Open vSwitch switching datapath
[ 24.764568] device ovs-system entered promiscuous mode
[ 25.109235] device br-int entered promiscuous mode
[ 25.121450]
[ 25.122468] ===============================
[ 25.124704] [ INFO: suspicious RCU usage. ]
[ 25.126644] 3.13.0-0.rc4.git5.1.fc21.x86_64 #1 Not tainted
[ 25.129110] -------------------------------
[ 25.132497] net/openvswitch/flow_table.c:436 suspicious
rcu_dereference_check() usage!
[ 25.135792]
[ 25.135792] other info that might help us debug this:
[ 25.135792]
[ 25.139221]
[ 25.139221] rcu_scheduler_active = 1, debug_locks = 0
[ 25.142044] 2 locks held by ovs-vswitchd/719:
[ 25.143934] #0: (cb_lock){++++++}, at: [<ffffffff816535c9>]
genl_rcv+0x19/0x40
[ 25.148294] #1: (ovs_mutex){+.+.+.}, at: [<ffffffffa01aedc9>]
ovs_flow_cmd_new_or_set+0xf9/0x600 [openvswitch]
[ 25.153885]
[ 25.153885] stack backtrace:
[ 25.156553] CPU: 10 PID: 719 Comm: ovs-vswitchd Not tainted
3.13.0-0.rc4.git5.1.fc21.x86_64 #1
[ 25.162587] Hardware name: Red Hat KVM, BIOS Bochs 01/01/2011
[ 25.165237] 0000000000000001 ffff8800370877e0 ffffffff8175b6d2
ffff880499f60000
[ 25.169376] ffff880037087810 ffffffff810cd2f7 ffff88049bfb1260
ffff88003708787c
[ 25.175682] ffff8800daaa7d68 ffff8800daaa7d48 ffff880037087860
ffffffffa01b6608
[ 25.180373] Call Trace:
[ 25.181540] [<ffffffff8175b6d2>] dump_stack+0x4d/0x66
[ 25.183970] [<ffffffff810cd2f7>] lockdep_rcu_suspicious+0xe7/0x120
[ 25.186854] [<ffffffffa01b6608>] ovs_flow_tbl_lookup+0x188/0x1b0
[openvswitch]
[ 25.189780] [<ffffffffa01aee06>] ovs_flow_cmd_new_or_set+0x136/0x600
[openvswitch]
[ 25.193182] [<ffffffff816552c1>] ? genl_family_rcv_msg+0x2c1/0x370
[ 25.195832] [<ffffffff8165518d>] genl_family_rcv_msg+0x18d/0x370
[ 25.198584] [<ffffffff81655370>] ? genl_family_rcv_msg+0x370/0x370
[ 25.201229] [<ffffffff816553fe>] genl_rcv_msg+0x8e/0xd0
[ 25.203439] [<ffffffff81653079>] netlink_rcv_skb+0xa9/0xc0
[ 25.205736] [<ffffffff816535d8>] genl_rcv+0x28/0x40
[ 25.207802] [<ffffffff816526a5>] netlink_unicast+0xd5/0x1a0
[ 25.210136] [<ffffffff81652aa7>] netlink_sendmsg+0x337/0x750
[ 25.212643] [<ffffffff81600cab>] sock_sendmsg+0x8b/0xc0
[ 25.214964] [<ffffffff811a7dbf>] ? might_fault+0x5f/0xb0
[ 25.217209] [<ffffffff811a7e08>] ? might_fault+0xa8/0xb0
[ 25.219443] [<ffffffff811a7dbf>] ? might_fault+0x5f/0xb0
[ 25.221785] [<ffffffff81610a5e>] ? verify_iovec+0x5e/0xe0
[ 25.224309] [<ffffffff81601109>] ___sys_sendmsg+0x3d9/0x3f0
[ 25.227001] [<ffffffff810575e7>] ? kvm_clock_read+0x27/0x40
[ 25.229696] [<ffffffff81021a59>] ? sched_clock+0x9/0x10
[ 25.232047] [<ffffffff810b64cd>] ? sched_clock_local+0x1d/0x80
[ 25.235062] [<ffffffff810b6658>] ? sched_clock_cpu+0xa8/0x100
[ 25.238061] [<ffffffff810cb4cd>] ? trace_hardirqs_off+0xd/0x10
[ 25.240594] [<ffffffff810b679f>] ? local_clock+0x5f/0x70
[ 25.243667] [<ffffffff810cc07f>] ? lock_release_holdtime.part.29+0xf/0x190
[ 25.246875] [<ffffffff8121c85d>] ? fget_light+0xed/0x4f0
[ 25.249346] [<ffffffff8121c7ac>] ? fget_light+0x3c/0x4f0
[ 25.252287] [<ffffffff81602662>] __sys_sendmsg+0x42/0x80
[ 25.254691] [<ffffffff816026b2>] SyS_sendmsg+0x12/0x20
[ 25.257184] [<ffffffff8176e329>] system_call_fastpath+0x16/0x1b
[ 25.359076] device br-tun entered promiscuous mode
Fedora release 20 (Heisenbug)
Kernel 3.13.0-0.rc4.git5.1.fc21.x86_64 on an x86_64 (ttyS0)
---------------------
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next prev parent reply other threads:[~2013-12-27 13:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-26 9:49 [Bug 67751] New: Stack trace with suspicious RCU usage, when starting ovs-switchd bugzilla-daemon
2013-12-27 12:21 ` [Bug 67751] " bugzilla-daemon
2013-12-27 13:56 ` bugzilla-daemon [this message]
2013-12-27 14:32 ` bugzilla-daemon
2014-01-28 8:28 ` bugzilla-daemon
2014-01-31 16:25 ` bugzilla-daemon
2014-06-24 9:53 ` bugzilla-daemon
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