[Xen-devel] oops starting domain on 4.0.0 + 2.6.32.13-gf6fe658

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

When I try and create a domain I get an oops which looks like it comes
from netback (see below) Xen is 4.0.0, domU is 2.6.32.13-gf6fe658. The
domain I'm creating is HVM.

I compile a lot of the xen stuff as modules... could that cause
anything?

# CONFIG_SYSFS_DEPRECATED_V2 is not set (if that matters)

The system is Debian testing (squeeze). udev is 154 (Debian version
154-1)

Any suggestions?

Thanks

James

[   72.603294] BUG: unable to handle kernel NULL pointer dereference at
0000000000000008
[   72.603515] IP: [<ffffffffa01e6354>] netback_uevent+0x28/0xaf
[xen_netback]
[   72.603662] PGD 1ead4067 PUD 2236067 PMD 0
[   72.603887] Oops: 0000 [#1] SMP
[   72.604063] last sysfs file: /sys/devices/vif-1-0/uevent
[   72.604154] CPU 0
[   72.604280] Modules linked in: ipv6 bridge softdog 8021q garp stp llc
blktap xen_netback xen_blkback blkback_pagemap xen_gntdev xen_evtchn
loop snd_pcm snd_timer snd soundcore snd_page_alloc evdev pcspkr tpm_tis
i2c_i801 tpm tpm_bios i2c_core button xfs exportfs dm_mod raid1 md_mod
sg sr_mod cdrom sd_mod usbhid hid usb_storage ata_generic ata_piix
thermal ide_pci_generic tg3 ahci libphy ide_core ehci_hcd libata
scsi_mod [last unloaded: scsi_wait_scan]
[   72.607018] Pid: 876, comm: udevd Not tainted 2.6.32.13-gf6fe658 #1
ProLiant ML110 G6
[   72.607144] RIP: e030:[<ffffffffa01e6354>]  [<ffffffffa01e6354>]
netback_uevent+0x28/0xaf [xen_netback]
[   72.607324] RSP: e02b:ffff88000239fdf8  EFLAGS: 00010246
[   72.607416] RAX: 0000000000000000 RBX: ffff88001cd20200 RCX:
0000000000000000
[   72.607513] RDX: ffffffffa01e770b RSI: ffff88001cd203b0 RDI:
0000000000000000
[   72.607611] RBP: ffff88001ed71000 R08: 0000000000000002 R09:
0000000000000073
[   72.607709] R10: 0000000000000367 R11: ffff88001fda5960 R12:
ffff88001cd20250
[   72.607806] R13: ffff88000221b000 R14: ffff88001ed71000 R15:
ffffffff8144ea70
[   72.607907] FS:  00007f2cb49c4790(0000) GS:ffff880002c93000(0000)
knlGS:0000000000000000
[   72.608035] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
[   72.608128] CR2: 0000000000000008 CR3: 000000001e9e7000 CR4:
0000000000002660
[   72.608226] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[   72.608323] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[   72.608421] Process udevd (pid: 876, threadinfo ffff88000239e000,
task ffff88001f48c200)
[   72.608549] Stack:
[   72.608629]  0000000000000001 ffff88001cd20240 ffff88001ed71000
ffff88001cd20250
[   72.608865] <0> ffff88000221b000 ffffffff811f1cee ffffffff8144ea40
ffff88001fda56c0
[   72.609220] <0> ffff88001cd20250 ffff88001ed71000 0000000000000000
ffffffff811f1e79
[   72.609648] Call Trace:
[   72.609733]  [<ffffffff811f1cee>] ? dev_uevent+0xff/0x141
[   72.609826]  [<ffffffff811f1e79>] ? show_uevent+0xcd/0x122
[   72.609919]  [<ffffffff811f19d4>] ? dev_attr_show+0x1e/0x44
[   72.610014]  [<ffffffff810af837>] ? __get_free_pages+0x9/0x47
[   72.610109]  [<ffffffff8112e6aa>] ? sysfs_read_file+0xab/0x131
[   72.610204]  [<ffffffff810dfbc5>] ? vfs_read+0xa5/0x168
[   72.610297]  [<ffffffff810bcc9f>] ? sys_mmap_pgoff+0x106/0x1a6
[   72.610392]  [<ffffffff810dfd3e>] ? sys_read+0x45/0x6e
[   72.610485]  [<ffffffff81011a42>] ? system_call_fastpath+0x16/0x1b
[   72.610579] Code: ff ff 90 41 55 41 54 55 48 89 f5 53 48 89 fb 48 8d
7f 40 48 83 ec 08 e8 e8 df 00 e1 48 8b 73 08 31 c9 31 ff 48 c7 c2 0b 77
1e a0 <4c> 8b 60 08 e8 4d 21 fe e0 48 3d 00 f0 ff ff 49 89 c5 76 17 89
[   72.613755] RIP  [<ffffffffa01e6354>] netback_uevent+0x28/0xaf
[xen_netback]
[   72.613900]  RSP <ffff88000239fdf8>
[   72.613984] CR2: 0000000000000008
[   72.614070] ---[ end trace d90165fd2f4b570b ]---
[   72.922777] tun: Universal TUN/TAP device driver, 1.6
[   72.922887] tun: (C) 1999-2004 Max Krasnyansky <maxk@xxxxxxxxxxxx>
[   83.432230] tap1.0: no IPv6 routers present

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