Public bug reported: Got following oops and system freezed completely, not even sysrq:s went thru.
(copied by hand from picture of console, pic at http://hautio.net/foo/cgroup_del_lru_list_2.6.32.25.JPG) BUG: unable to handle kernel NULL pointer dereference at 0000000000000328 IP: [<ffffffff8113b997>] mem_cgroup_del_lru_list+0x67/0xa0 PGD 0 Oops: 0002 [#1] SMP last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:04:03.0/class CPU 1 Modules linked in: btrfs zlib_deflate crc32c libcrc32c ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs exportfs reiserfs nfs lockd nfs_acl auth_rpcgss sunrpc binfmt_misc ppdev snd_hda_codec_intelhdmi snd_hda_codec_realtek fbcon tileblit font bitblit softcursor vga16fb vgastate joydev snd_hda_intel coretemp snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm i915 drm_k ns_helper snd_seq_dummy snd_seq_oss dvb_usb_dib0700 dib7000p drm i2c_algo_bit dib7000m video snd_seq_midi output dib0070 dvb_usb hwmon_vid intel_agp lp snd_rawmidi dib3000mc dib8000 pl2303 usblp dibx000_common usbhid snd_seq_midi_event usbserial dvb_core serio_raw hid snd_seq snd_timer snd_seq_device snd asus_atk0110 soundcore snd_page_alloc parport ohci1394 usb_storage ieee194 atl1 mii pata_jmicron Pid: 23123, comm: mythbacked Not tainted 2.6.32-25-generic #44-Ubuntu P5E-VM HDMI RIP: 0010:[<ffffffff8113b997>] {<ffffffff8113b997>] mem_cgroup_del_lru_list+0x67/0xa0 RAX: ffff88012c2dc550 RBX: 0000000000000001 RCX: ffff88012ba29c00 RDX: 00000000000002d0 RSI: 0000000000000030 RDI: 000000000000003f RBP: ffff88011907b978 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000000000000 R11: dead000000200200 R12: ffffea0004034770 R13: 000000000000000c R14: ffff88002828ec98 R15: ffff880000016080 FS: 0000000000000000(0000) GS:ffff880028280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000328 CR3: 0000000001001000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR4: 00000000ffff0ff0 DR7: 0000000000000400 Process mythbackend (pid: 23123, threadinfo ffff88011907a00, task ffff8800cd518000) Stack: 000000000000000e 000000000000000e ffff88011907ba48 ffffffff810fe56f <0> ffff880100000001 0000000000000282 000000000000000c 0000000000000000 <0> ffffea0003970a28 ffffea0003ac2f20 ffffea0003cbcb20 ffffea00021dba40 Call Trace: [<ffffffff810fe56f>] release_pages+0x16f/0x2a0 [<ffffffff81122964>] free_pages_and_swap_cache+0xb4/0xe0 [<ffffffff812b2eab>] ? cpumask_any_but+0x2b/0x40 [<ffffffff811113c1>] zap_pte_range+0x311/0x400 [<ffffffff810fe64c>] ? release_page_range+0x24c/0x2a0 [<ffffffff811123a5>] unmap_page_range+1x1c5/0x2a0 [<ffffffff81112bb8>] unmap_vmas+0x178/0x310 [<ffffffff8111767b>] exit_mmap+0xbb/0x190 [<ffffffff81063d2d>] mmput+0x4c/0x120 [<ffffffff8106a2f2>] exit_mm+0x112/0x150 [<ffffffff815436e5>] ? _spin_lock_irq+0x15/0x20 [<ffffffff8106a565>] do_exit+0x125/0x380 [<ffffffff8106a815>] do_group_exit+0x55/0xd0 [<ffffffff8107b197>] get_signal_to_deliver+0x1d7/0x3d0 [<ffffffff81011a45>] do_signal+0x75/0x1c0 [<ffffffff81098139>] ? do_futex+0xc9/0x1b0 [<ffffffff81011bed>] do_notify_resume+0x5d/0x80 [<ffffffff8101247e>] int_signal+0x12/0x17 Code: 74 27 48 89 f2 48 89 f7 48 c1 ea 38 48 c1 ef 3a 83 e2 03 48 89 d6 48 c1 e2 08 48 c1 e6 04 48 29 f2 48 03 94 f9 00 00 00 89 db <48> 83 6c da 50 01 48 8b 15 c4 40 6f 00 48 39 50 08 74 1b 48 8b RIP [<ffffffff8113b997>] mem_cgroup_del_lru_list+0x67/0xa0 ESP <ffff88011907b968> CR2: 0000000000000328 ---[ end trace e21feee53a295771 ]--- Fixing recursive fault but reboot is needed! ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- kernel oops on "service mythbackend restart" https://bugs.launchpad.net/bugs/681753 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
