Comment 2 for bug 931128

And here is a transscript of the tacktrace:

 2749.601653] general protection fault: 0000 [#1] SMP
[ 2749.601735] CPU 1
[ 2719.601758] Modules linked in: msr dm_crypt bnep rfcomm bluetooth joydev vmnet ppdev parport_pc vsock vmci vmmon bbswitch snd_hda_codec_realtek sparse_keymap snd_hda_intel snd_hda_codec snd_seq_midi snd_hwdep uvcvideo videodev v4l2_compat_ioctl32 snd_pcm snd_rawmidi arc4 snd_seq_midi_event psmouse snd_seq serio_raw rts_pstor(C) snd_timer snd_seq_device ath9k mac80211 ath9k_common ath9k_hw snd ath cfg80211 mei(C) soundcore snd_page_alloc tpm_tis lp parport sdhci_pci sdhci i915 drm_kms_helper drm ahci libahci tq3 xhci_hcd i2c_algo_bit mxm_wmi wmi video [last unloaded: nvidia]
[ 2749.602494]
[ 2749.602516] Pid: 1873, comm: virtuoso-t Tainted: P C 3.0.0-15-generic #26—Ubuntu Acer TravelMate 8481TG/BA41_HS
[ 2749.602636] RIP: 0010:[<ffffffff8119a429>] [<ffffffff8119a429>] bio_get_nr_vecs+0x9/0x40
[ 2749.602636] RSP: 0018:ffff880202cdf998 EFLAGS: 00010292
[ 2749.605741] RAX: ffffea0006d0ba88 RBX: ffff880202cdfba0 RCX: ffff88022fb596e8
[ 2749.608654] RDX: ffff880202cdfea8 RSI: ffff88022ce7d6f0 RDI: 0001010100010101
[ 2749.611538] RBP: ffff880202cdf998 R08: ffff88022ddc3800 R09: 0000000000000001
[ 2749.614388] R10: 0000000000000002 R11: 0000000000008000 R12: ffff88022ce7d6f0
[ 2749.617233] R13: ffff880202cdfea8 R14: 0000000000001000 R15: ffff88022fb596e8
[ 2749.620092] FS: 00007fabc12e5740(0000) GS:ffff88023fa40000(0000) knlGS:0000000000000000
[ 2749.622926] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2749.625756] CR2: 00007f187e94f000 CR3: 0000000204b70000 CR4: 00000000000406e0
[ 2749.628624] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2749.631476] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 2749.634348] Process virtuoso—t (pid: 1873, threadinfo ffff880202cde000, task ffff8802018b0000)
[ 2749.637243] Stack:
[ 2749.640047] ffff880202cdf9e8 ffffffff8120d3d3 ffff8801408cf6c0 ffffea0006d0ba88
[ 2749.642936] ffff8801ba2bac90 ffff880202cdfba0 ffff8801ba2bac90 ffff88022fb596e8
[ 2749.645837] 0000000000001000 ffff88022ce7d6f0 ffff880202cdfa38 ffffffff8120d6aa
[ 2749.648931] Call Trace:
[ 2749.651992] [<ffffffff8120d3d3>] io_submit_init.isra.4+0x33/0xf0
[ 2749.654912] [<ffffffff8120d6aa>] io_submit_add_bh+0x1ba/0x1d0
[ 2749.657835] [<ffffffff8120d7b6>] ext4_bio_write_page+0xf6/0x180
[ 2749.660750] [<ffffffff81207871>] mpage_da_submit_io+0x511/0x580
[ 2749.663722] [<ffffffff8120b926>] mpage_da_map_and_submit+0x1d6/0x360
[ 2749.666617] [<ffffffff8120bf87>] write_cache_pages_da+0x3e7/0x450
[ 2749.669602] [<ffffffff81245823>] ? jbd2_journal_start+0x13/0x20
[ 2749.672503] [<ffffffff81222359>] ? ext4_journal_start_sb+0x69/0x170
[ 2749.675399] [<ffffffff8120c311>] ext4_da_writepages+0x321/0x5e0
[ 2749.678331] [<ffffffff81115211>] do_writepages+0x21/0x40
[ 2749.681309] [<ffffffff8110db5b>] __filemap_fdatawrite_rage+0x5b/0x60
[ 2749.604327] [<ffffffff8110bdb2>] filemap_write_and_wait_range+0x52/0x8?
[ 2749.687300] [<ffffffff811940e2>] vfs_fsync_range+0x42/0xa0
[ 2749.690231] [<ffffffff811941ac>] vfs_fsync+0x1c/0x20
[ 2749.693136] [<ffffffff811944c3>] sys_fsync+0x33/0x50
[ 2749.696254] [<ffffffff815fa1c2>] system_call_fastpath+0x16/0x1b
[ 2749.699598] Code: 60 04 00 00 e8 f2 16 44 00 48 c7 c7 ae 38 a0 81 31 c0 e8 e4 16 44 00 eb a2 90 90 90 90 90 90 90 90 90 55 48 89 e5 66 66 66 66 90
[ 2749.699825] 8b 87 90 00 00 00 5d 48 8b 88 20 03 00 00 8b 81 74 04 00 00
[ 2749.705974] RIP [<ffffffff8119a429>] bio_get_nr_vecs+0x9/0x40
[ 2749.709135] RSP <ffff88202cdf998>

please let me know whether further info is needed.