Comment 9 for bug 231746

I am facing this one too - not using nfs, but a simple dovecot imap server (but using xen):

[2831529.979439] Unable to handle kernel paging request at ffff88005e800008 RIP:
[2831529.979447] [<ffffffff80271fc6>] iov_iter_advance+0x66/0x80
[2831529.979458] PGD 1f6b067 PUD 216d067 PMD 2262067 PTE 0
[2831529.979462] Oops: 0000 [1] SMP
[2831529.979465] CPU 0
[2831529.979467] Modules linked in: af_packet ipv6 evdev ext3 jbd mbcache raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear md_mod dm_mirror dm_snapshot dm_mod fuse
[2831529.979482] Pid: 9629, comm: imap Not tainted 2.6.24-18-xen #1
[2831529.979484] RIP: e030:[<ffffffff80271fc6>] [<ffffffff80271fc6>] iov_iter_advance+0x66/0x80
[2831529.979488] RSP: e02b:ffff8800308e3b10 EFLAGS: 00010246
[2831529.979490] RAX: 0000000000000000 RBX: 00000000000003f2 RCX: 0000000000000000
[2831529.979492] RDX: 0000000000000000 RSI: 00000000000003f2 RDI: ffff8800308e3ba8
[2831529.979494] RBP: 00000000000003f2 R08: 0000000000000000 R09: 0000000000000000
[2831529.979496] R10: ffff88005e800000 R11: 0000000000000000 R12: 00000000001cab54
[2831529.979498] R13: 00000000000004ac R14: ffff88005ce7e598 R15: 0000000000000b54
[2831529.979501] FS: 00007ff0dd2e36e0(0000) GS:ffffffff805c6000(0000) knlGS:0000000000000000
[2831529.979503] CS: e033 DS: 0000 ES: 0000
[2831529.979505] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[2831529.979507] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000000
[2831529.979510] Process imap (pid: 9629, threadinfo ffff8800308e2000, task ffff88005d9e8040)
[2831529.979512] Stack: ffffffff80273f9e ffff8800096bfe80 0000000000000026 0000000000000026
[2831529.979517] ffff8800308e3db8 00000000001cab54 ffff8800308e3d38 ffff88005007c840
[2831529.979520] ffff88005ce7e598 ffffffff880bcac0 ffff88005ce7e488 0000000000000000
[2831529.979524] Call Trace:
[2831529.979528] [<ffffffff80273f9e>] generic_file_buffered_write+0x1de/0x6e0
[2831529.979532] [<ffffffff8023ab0e>] current_fs_time+0x1e/0x30
[2831529.979536] [<ffffffff802746ef>] __generic_file_aio_write_nolock+0x24f/0x400
[2831529.979539] [<ffffffff80461fd9>] unix_stream_recvmsg+0x269/0x5d0
[2831529.979543] [<ffffffff80274904>] generic_file_aio_write+0x64/0xd0
[2831529.979552] [<ffffffff880a9663>] :ext3:ext3_file_write+0x23/0xc0
[2831529.979558] [<ffffffff880a9640>] :ext3:ext3_file_write+0x0/0xc0
[2831529.979561] [<ffffffff8029d6bb>] do_sync_readv_writev+0xcb/0x110
[2831529.979565] [<ffffffff8024cc20>] autoremove_wake_function+0x0/0x30
[2831529.979568] [<ffffffff8029d8f9>] do_sync_read+0xd9/0x120
[2831529.979571] [<ffffffff8029a30c>] __kmalloc+0x13c/0x160
[2831529.979574] [<ffffffff8029de5d>] do_readv_writev+0xfd/0x230
[2831529.979577] [<ffffffff8046ffea>] schedule_timeout+0x5a/0xd0
[2831529.979579] [<ffffffff80470349>] mutex_lock+0x9/0x20
[2831529.979582] [<ffffffff802ce5e5>] sys_epoll_wait+0x245/0x4e0
[2831529.979586] [<ffffffff8029e4d3>] sys_writev+0x53/0xc0
[2831529.979589] [<ffffffff8020c698>] system_call+0x68/0x6d
[2831529.979591] [<ffffffff8020c630>] system_call+0x0/0x6d
[2831529.979593]
[2831529.979594]
[2831529.979595] Code: 49 8b 52 08 49 89 d3 eb c4 4c 89 17 4c 89 4f 10 eb 99 0f 1f
[2831529.979605] RIP [<ffffffff80271fc6>] iov_iter_advance+0x66/0x80
[2831529.979608] RSP <ffff8800308e3b10>
[2831529.979610] CR2: ffff88005e800008
[2831529.979614] ---[ end trace efc314f13325de04 ]---