[Xen-devel] kernel bug in netback.c

[William Dauchy <wdauchy@xxxxxxxxx>]

Hello,

Using xen-4.1 and dom0 3.4.97, I'm getting the following trace. I was
wondering if the 3.4.x stable tree was not missing any patch.

------------[ cut here ]------------
kernel BUG at drivers/net/xen-netback/netback.c:1737!
invalid opcode: 0000 [#1] SMP
Modules linked in: ebt_arp sd_mod crc_t10dif ebt_ip6 ebt_dnat ebt_ip
ebtable_broute ebt_snat ebtable_nat ebtable_filter ebtables bridge stp
llc ipmi_devintf iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
scsi_mod ipmi_si ipmi_msghandler aoe(O) rtc_cmos button

Pid: 1407, comm: netback/9 Tainted: G           O
3.4.97-dom0-a801fd8-i386 #68          /0D61XP
EIP: 0061:[<c124ea69>] EFLAGS: 00010287 CPU: 9
EIP is at xen_netbk_idx_release+0x109/0x120
EAX: 0000006f EBX: f5093584 ECX: 00000000 EDX: 0000006f
ESI: 0000006f EDI: 0000006f EBP: ed473ee8 ESP: ed473ecc
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069
CR0: 8005003b CR2: 08acb2f8 CR3: 27013000 CR4: 00002660
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: ffff0ff0 DR7: 00000400
Process netback/9 (pid: 1407, ti=ed472000 task=eeb0b500 task.ti=ed472000)
Stack:
 0000007f ffffffff e70eac00 00000071 f5093584 f5094e00 ffffffff ed473fb8
 c1250564 f3ec1da0 00000086 00000840 ed473fa8 c1059d04 e8ab4d40 0000007d
 ed473fa0 ed473f8c ed473f6c f3128300 e8ab4c40 eeb0b500 eeb0b500 f5094de8
Call Trace:
 [<c1250564>] xen_netbk_kthread+0x954/0xe20
 [<c1059d04>] ? idle_balance+0xd4/0x120
 [<c1049cc0>] ? wake_up_bit+0x30/0x30
 [<c124fc10>] ? xen_netbk_tx_build_gops+0xe90/0xe90
 [<c1049964>] kthread+0x74/0x80
 [<c10498f0>] ? kthread_freezable_should_stop+0x50/0x50
 [<c13c11f6>] kernel_thread_helper+0x6/0x10
Code: 8b 44 93 0c c7 40 04 00 00 00 00 8b 44 93 0c e8 de f7 e3 ff 8b
7d e4 c7 44 bb 0c 00 00 00 00 83 c4 10 5b 5e 5f c9 c3 0f 0b eb fe <0f>
0b eb fe 0f 0b eb fe eb 0d 90 90 90 90 90 90 90 90 90 90 90
EIP: [<c124ea69>] xen_netbk_idx_release+0x109/0x120 SS:ESP 0069:ed473ecc
---[ end trace b51200cc1b02fe07 ]---
vif vif-50-0: 2 reading script
p47: port 5(vif50.0) entered disabled state


-- 
William

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