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libreport version: 2.0.5.982 abrt_version: 2.0.4.981 cmdline: BOOT_IMAGE=/vmlinuz-3.1.0-0.rc8.git0.0.fc16.x86_64 root=/dev/mapper/vg_bozo-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=vg_bozo/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.luks=0 rd.lvm.lv=vg_bozo/lv_root LANG=en_US.UTF-8 comment: doing nothing exiting kernel: undefined kernel_tainted: 128 kernel_tainted_long: Kernel has oopsed before. reason: BUG: unable to handle kernel NULL pointer dereference at (null) time: Sun Oct 2 14:13:09 2011 backtrace: :BUG: unable to handle kernel NULL pointer dereference at (null) :IP: [<ffffffff8114de10>] __block_write_full_page+0xc7/0x2d4 :PGD 0 :Oops: 0000 [#1] SMP :CPU 3 :Modules linked in: ums_realtek usb_storage uas ppdev parport_pc lp parport fuse 8021q garp stp llc fcoe libfcoe libfc scsi_transport_fc scsi_tgt rfcomm bnep nf_conntrack_ipv4 nf_defrag_ipv4 ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables binfmt_misc snd_hda_codec_hdmi snd_hda_codec_realtek arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_seq btusb iwlagn snd_seq_device mac80211 uvcvideo videodev bluetooth cfg80211 media snd_pcm snd_timer snd iTCO_wdt microcode iTCO_vendor_support r8169 i2c_i801 dell_laptop dcdbas dell_wmi sparse_keymap uinput joydev v4l2_compat_ioctl32 soundcore rfkill mii snd_page_alloc wmi i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] :Pid: 2835, comm: flush-8:0 Not tainted 3.1.0-0.rc8.git0.0.fc16.x86_64 #1 Dell Inc. Dell System Inspiron N4110/05TM8C :RIP: 0010:[<ffffffff8114de10>] [<ffffffff8114de10>] __block_write_full_page+0xc7/0x2d4 :RSP: 0018:ffff88012ddf99a0 EFLAGS: 00010293 :RAX: 0000000000000020 RBX: ffffea0004797d80 RCX: 0000000000000002 :RDX: 000000000007cfff RSI: ffffea0004797d80 RDI: ffff88012fd51458 :RBP: ffff88012ddf9a00 R08: ffffffff8114f81d R09: fffffffffffffff5 :R10: 00000000000162b4 R11: 0000000000016268 R12: ffff88012fd51458 :R13: 0000000000000000 R14: ffff8801377c4c30 R15: 0000000000000001 :FS: 0000000000000000(0000) GS:ffff88013fac0000(0000) knlGS:0000000000000000 :CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b :CR2: 0000000000000000 CR3: 0000000001a05000 CR4: 00000000000406e0 :DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 :DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 :Process flush-8:0 (pid: 2835, threadinfo ffff88012ddf8000, task ffff88012d990000) :Stack: : ffffffff81152397 ffffffff8114f81d ffff88012ddf9ca0 0000000000000400 : 000000000007cfff 000000000004100c 0000000000040000 ffffea0004797d80 : ffff88012fd51458 ffff88012ddf9ca0 ffffffff8114f81d ffffffff81152397 :Call Trace: : [<ffffffff81152397>] ? thaw_bdev+0x79/0x79 : [<ffffffff8114f81d>] ? bit_spin_lock.constprop.20+0x2c/0x2c : [<ffffffff8114f81d>] ? bit_spin_lock.constprop.20+0x2c/0x2c : [<ffffffff81152397>] ? thaw_bdev+0x79/0x79 : [<ffffffff8114f707>] block_write_full_page_endio+0x87/0x94 : [<ffffffff8114f729>] block_write_full_page+0x15/0x17 : [<ffffffff81152108>] blkdev_writepage+0x18/0x1a : [<ffffffff810e61f8>] __writepage+0x15/0x2e : [<ffffffff810e602a>] write_cache_pages+0x218/0x348 : [<ffffffff810e61e3>] ? set_page_dirty_lock+0x33/0x33 : [<ffffffff810e619a>] generic_writepages+0x40/0x56 : [<ffffffff810e6f01>] do_writepages+0x21/0x2a : [<ffffffff81147b80>] writeback_single_inode+0x113/0x2c7 : [<ffffffff81148031>] writeback_sb_inodes+0x16e/0x208 : [<ffffffff81148143>] __writeback_inodes_wb+0x78/0xb9 : [<ffffffff811482a9>] wb_writeback+0x125/0x231 : [<ffffffff8113c5e0>] ? get_nr_inodes_unused+0x45/0x5c : [<ffffffff811487ad>] wb_do_writeback+0x146/0x1b5 : [<ffffffff81148897>] bdi_writeback_thread+0x7b/0x1f8 : [<ffffffff8114881c>] ? wb_do_writeback+0x1b5/0x1b5 : [<ffffffff81072def>] kthread+0x84/0x8c : [<ffffffff814be1f4>] kernel_thread_helper+0x4/0x10 : [<ffffffff81072d6b>] ? kthread_worker_fn+0x148/0x148 : [<ffffffff814be1f0>] ? gs_change+0x13/0x13 :Code: e0 48 89 45 c8 8b 45 b8 4d 89 f5 48 89 45 b8 48 8b 55 c0 48 39 55 c8 76 12 4c 89 ef e8 3f e8 ff ff 4c 89 ef e8 0a e8 ff ff eb 71 :RIP [<ffffffff8114de10>] __block_write_full_page+0xc7/0x2d4 : RSP <ffff88012ddf99a0>
Have you seen this again on a 3.2.x kernel? There have been a number of fixes in the block layer.