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Re: [Xen-devel] Regression in netfilter code under Xen
No, this happens before guests are started.
On November 26, 2014 4:45:22 AM EST, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
On Tue, 2014-11-25 at 15:23 -0500, Boris Ostrovsky wrote:
We have a regression due to (5195c14c8: netfilter: conntrack: fix race
in __nf_conntrack_confirm against get_next_corpse). I have not been able
to reproduce this on baremetal but dom0 crashes reliably after a few
seconds of idle time.
Are guests running when this happens? (IOW is netback possibly
involved).
This doesn't appear to be dependent on Xen version
--- I saw it on at least a 4.2 and unstable).
I don't know much about networking (and will be out for most of the rest
of the week) so I wonder whether anyone has any ideas. The stack is below.
Thanks.
-boris
#
[
54.901368] general protection fault: 0000 [#1] SMP
[ 54.919324] Modules linked in: dm_multipath dm_mod xen_evtchn
iscsi_boot_sysfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport
libcrc32c crc32c_generic crc32c_intel sg sr_mod cdrom sd_mod i915 fbcon
tileblit font bitblit softcursor tpm_tis ahci libahci libata
drm_kms_helper video scsi_mod e1000e wmi xen_blkfront xen_netfront
fb_sys_fops sysimgblt sysfillrect syscopyarea xenfs xen_privcmd
[ 54.996767] CPU: 1 PID: 0 Comm: swapper/1 Not tainted
3.18.0-rc5upstream-00179-g8a84e01 #1
[ 55.016730] Hardware name: LENOVO ThinkServer TS130/ , BIOS
9HKT47AUS 01/10/2012
[ 55.036873] task: ffff880037e48a10 ti: ffff880037e54000 task.ti:
ffff880037e54000
[ 55.057338] RIP: e030:[<ffffffff815ea29e>] [<ffffffff815ea29e>]
nf_ct_del_from_dying_or_unconfirmed_list+0x3e/0x70
[ 55.[ 55.099069] RAX: dead000000200200 RBX: ffffe8ffffc89108 RCX:
ffffffff81cc5820
[ 55.119918] RDX: 0000000080000001 RSI: 0000000000000011 RDI:
ffffe8ffffc89108
[ 55.140768] RBP: ffff88003e283908 R08: 00000000c5f889ff R09:
00000000a1a10f28
[ 55.161785] R10: ffff880037e5f1b8 R11: 0000000000000001 R12:
ffff880037e5f148
[ 55.183005] R13: ffffffff815e6a6b R14: ffff88002bed8400 R15:
ffff88002bb30000
[ 55.204214] FS: 00007f668f694700(0000) GS[ 55.225733] CS: e033
DS: 002b ES: 002b CR0: 0000000080050033
[ 55.247220] CR2: 00007f66c0a598eb CR3: 000000002bc39000 CR4:
0000000000042660
[ 55.268863] Stack:
[ 55.290200] ffff880037e5f148 ffffffff81c98080 ffff88003e283928
ffffffff815eb59d
[ 55.312068] ffff88002bed8400 ffff88002bed8400 ffff88003e283938
ffffffff815e689a
[ 55.333849] ffff88003e283958 ffffffff815a37a5 ffff88003e283968
ffff88002bed8400
[ 55.355449] Call Trace:
[ 55.376552] <IRQ>
[ 55.376728] [<ffffffff815eb59d>] destroy_conntrack+0x5d/0xc0
[ 55.418187] [<ffffffff815e689a>] nf_conntrack_destroy+0x1a/0x40
[ 55.439349] [<ffffffff815a37a5>] skb_release_head_state+0x85/0xd0
[ 55.460468] [<ffffffff815a5d61>] skb_release_all+0x11/0x30
[ 55.481440] [<ffffffff815a5dd1>] __kfree_skb+0x11/0xc0
[ 55.502239] [<ffffffff815a5f78>] kfree_skb+0x38/0xa0
[ 55.522661] [<ffffffff816044b0>] ? ip_rcv+0x3a0/0x3a0
[ 55.542811] [<ffffffff816044b0>] ? ip_rcv+0x3a0/0x3a0
[ 55.562543] [<ffffffff815e6a6b>] nf_hook_slow+0x10b/0x120
[ 55.582100] [<ffffffff816044b0>] ? ip_rcv+0x3a0/0x3a0
[ 55.601470] [<ffffffff8170a02b>] ? _raw_spin_unlock_irqrestore+0[
55.620900] [<ffffffff81604713>] ip_local_deliver+0x73/0x80
[ 55.640154] [<ffffffff81603dc9>] ip_rcv_finish+0x109/0x310
[ 55.659244] [<ffffffff8160439c>] ip_rcv+0x28c/0x3a0
[ 55.678287] [<ffffffff815b69ae>]
__netif_receive_skb_core+0x58e/0x[ 55.697287] [<ffffffff815b6b4d>]
__netif_receive_skb+0x1d/0x70
[ 55.715820] [<ffffffff815b6d9e>] netif_receive_skb_internal+0x1e/0xb0
[ 55.734442] [<ffffffff815b6e47>] netif_receive_skb+0x17/0x70
[ 55.752898] [<ffffffff816c17e2>] br_handle_frame_finish+0x192/0x360
[ 55.771709] [<ffffffff816c156d>] br_handle_frame+0
[ 55.790274] [<ffffffff816c13f0>] ? br_handle_local_finish+0x40/0x40
[ 55.808760] [<ffffffff815b65f7>] __netif_receive_skb_core+0x1d7/0x710
[ 55.827302] [<ffffffff815b6b4d>] __netif_receive_skb+0x1d/0x70
[ 55.845594] [<ffffffff815b6d9e>] netif_receive_skb_internal+0x1e/0xb0
[ 55.863836] [<ffffffff815b7a38>] napi_gro_receive+0x118/0x1a0
[ 55.881549] [<ffffffff814c430f>] tg3_poll_work+0xe1f/0x1[
55.898629] [<ffffffff814d75c9>] tg3_poll+0x69/0x3c0
[ 55.915010] [<ffffffff815b7523>] net_rx_action+0x103/0x290
[ 55.930840] [<ffffffff810a7713>] __do_softirq+0xf3/0x2e0
[ 55.946310] [<ffffffff810a7a2d>] irq_exit+0xcd/0xe0
[ 55.961399] [<ffffffff8140d4c7>] xen_evtchn_do_upcall+0x37/0x50
766] [<ffffffff8170c1fe>] xen_do_hypervisor_callback+0x1e/0x30
[ 55.990802] <EOI>
[ 55.990977] [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
[ 56.018897] [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
[ 56.032815] [<ffffffff810454b0>] ? xen_safe_halt+0x10/0x20
[ 56.046583] [<ffffffff81059e3a>] ? default_idle+0x1a/0xd0
[ 56.060307] [<ffffffff8105950a>] ? arch_cpu_idle+0xa/0x10
[ 56.073920] [<ffffffff810de483>] ? cpu_startup_entry+0x2d3/0[
56.100421] [<ffffffff8104c355>] ? cpu_bringup_and_idle+0x25/0x40
[ 56.113427] Code: 98 08 08 00 00 0f b7 47 08 48 03 1c c5 a0 42 cc 81
48 89 df e8 94 fc 11 00 49 8b 44 24 18 48 85 c0 74 2d 49[
56.141507] RIP [<ffffffff815ea29e>]
nf_ct_del_from_dying_or_unconfirmed_list+0x3e/0x70
[ 56.155425] RSP <ffff88003e2838f8>
[ 56.169234] ---[ end trace 4c64578e4c629cc4 ]---
[ 56.182913] Kernel panic - not syncing: Fatal exception in interrupt
[ 56.197026] Kernel Offset: 0x0 from 0xffffffff81000k text console
(XEN) [2014-11-23 06:05:48] Domain 0 crashed: rebooting machine in 5
seconds.
(XEN) [2014-11-23 06:05:53] Resetting with ACPI MEMORY or I/O RESET_REG.
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