https://bugzilla.kernel.org/show_bug.cgi?id=67751 Kashyap Chamarthy <kashyap.cv@xxxxxxxxx> 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@xxxxxxxxx> --- 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) --------------------- -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
