I am also experiencing this problem on a domU with kernel 2.6.22-14-xen
with xen 3.10
Does a newer kernel resolve the issue ?
Kernel Backtrace:
[1640817.442940] BUG: unable to handle kernel NULL pointer dereference at
virtual address 00000108
[1640817.442953] printing eip:
[1640817.442958] 0f9fd000 -> *pde = 00000000:2d376001
[1640817.442962] 0aaa2000 -> *pme = 00000000:00000000
[1640817.442966] Oops: 0000 [#1]
[1640817.442968] SMP
[1640817.442972] Modules linked in: evdev 8250 serial_core ext3 jbd mbcache
fuse
[1640817.442985] CPU: 0
[1640817.442985] EIP: 0061:[<d11268c9>] Not tainted VLI
[1640817.442986] EFLAGS: 00010286 (2.6.22-14-xen #1)
[1640817.442999] EIP is at walk_page_buffers+0x19/0x70 [ext3]
[1640817.443002] eax: 00000000 ebx: 00000000 ecx: 00000000 edx: 00000104
[1640817.443006] esi: 00000104 edi: c0437178 ebp: 00000000 esp: cf253e04
[1640817.443009] ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0069
[1640817.443013] Process pdflush (pid: 60, ti=cf252000 task=cf3a6a60
task.ti=cf252000)
[1640817.443017] Stack: 00000000 cacc5210 c1728b60 c0437178 cacc5210 cacc5210
d1129ad1 00001000
[1640817.443028] 00000000 d1126920 00000000 c1728b60 cf253f70 c9e2913c
00000002 cf253f70
[1640817.443039] 00000000 c0157a58 c1728b60 c0157f14 00000000 0000000e
c0157a50 c9e2913c
[1640817.443050] Call Trace:
[1640817.443053] [<d1129ad1>] ext3_ordered_writepage+0xe1/0x1a0 [ext3]
[1640817.443063] [<d1126920>] bget_one+0x0/0x10 [ext3]
[1640817.443070] [<c0157a58>] __writepage+0x8/0x30
[1640817.443076] [<c0157f14>] write_cache_pages+0x214/0x310
[1640817.443081] [<c0157a50>] __writepage+0x0/0x30
[1640817.443086] [<c02ff2f6>] schedule+0x356/0x900
[1640817.443092] [<c0158030>] generic_writepages+0x20/0x30
[1640817.443096] [<c0158089>] do_writepages+0x49/0x50
[1640817.443101] [<c0198153>] __writeback_single_inode+0x93/0x3c0
[1640817.443106] [<c0300193>] schedule_timeout+0x53/0xd0
[1640817.443111] [<c02ff2f6>] schedule+0x356/0x900
[1640817.443115] [<c019880e>] sync_sb_inodes+0x17e/0x240
[1640817.443120] [<c0198cd9>] writeback_inodes+0x99/0xd0
[1640817.443125] [<c0158735>] wb_kupdate+0x85/0xf0
[1640817.443130] [<c0158ad0>] pdflush+0x0/0x260
[1640817.443134] [<c0158c18>] pdflush+0x148/0x260
[1640817.443138] [<c01586b0>] wb_kupdate+0x0/0xf0
[1640817.443142] [<c0136312>] kthread+0x42/0x70
[1640817.443147] [<c01362d0>] kthread+0x0/0x70
[1640817.443151] [<c0105927>] kernel_thread_helper+0x7/0x10
[1640817.443156] =======================
[1640817.443159] Code: 74 f0 31 c0 39 cb 5b 0f 92 c0 c3 8d b4 26 00 00 00 00 55
57 89 d7 56 53 83 ec 08 89 0c 24 31 c9 89 44 24 04 8b 6a 14 8d 5c 0d 00 <8b> 72
04 3b 1c 24 76 2f 89 d8 29 e8 3b 44 24 1c 73 25 8b 44 24
[1640817.443211] EIP: [<d11268c9>] walk_page_buffers+0x19/0x70 [ext3] SS:ESP
0069:cf253e04
--
Kernel BUG: unable to handle kernel NULL pointer dereference at virtual address
00000108
https://bugs.launchpad.net/bugs/236059
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