The filesystem details are as follows. This may be related to an historic bug in the filesystem that is now causing ongoing corruption as the file system was created in 2010.
mr-russ@mirror:~$ sudo tune2fs -l /dev/vda1 tune2fs 1.42.9 (4-Feb-2014) Filesystem volume name: <none> Last mounted on: / Filesystem UUID: 8c150a35-6a37-41c4-9155-a99e5acce610 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 1962240 Block count: 7863809 Reserved block count: 392018 Free blocks: 2843701 Free inodes: 1509317 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 1022 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8176 Inode blocks per group: 511 Flex block group size: 16 Filesystem created: Sat May 22 20:51:25 2010 Last mount time: Fri Apr 3 09:34:17 2015 Last write time: Fri Apr 3 09:34:16 2015 Mount count: 1 Maximum mount count: 23 Last checked: Fri Apr 3 09:33:20 2015 Check interval: 15552000 (6 months) Next check after: Wed Sep 30 08:33:20 2015 Lifetime writes: 310 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: af2303c6-1959-47cd-9fbf-3478192a400a Journal backup: inode blocks -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1298972 Title: stacktrace in ext4: /build/buildd/linux-3.13.0/fs/ext4/ext4_jbd2.c:259 __ext4_handle_dirty_metadata+0x1a2/0x1c0() Status in linux package in Ubuntu: Confirmed Bug description: I was running an "apt-get dist-upgrade" when the FS suddenly remounted to RO. The 2 audit lines are from apt-dater running successively "apt- get update" and "apt-get dist-upgrade": [153439.007924] type=1006 audit(1396010484.706:46): pid=16029 uid=0 old auid=4294967295 new auid=104 old ses=4294967295 new ses=9 res=1 [153502.372488] type=1006 audit(1396010548.070:47): pid=16086 uid=0 old auid=4294967295 new auid=104 old ses=4294967295 new ses=10 res=1 [153523.874714] EXT4-fs error (device vda1): ext4_mb_generate_buddy:756: group 1, 6475 clusters in bitmap, 6473 in gd; block bitmap corrupt. [153523.876361] Aborting journal on device vda1-8. [153523.889719] EXT4-fs error (device vda1): ext4_journal_check_start:56: Detected aborted journal [153523.890881] EXT4-fs (vda1): Remounting filesystem read-only [153523.891574] EXT4-fs (vda1): Remounting filesystem read-only [153523.892301] ------------[ cut here ]------------ [153523.892341] WARNING: CPU: 0 PID: 16129 at /build/buildd/linux-3.13.0/fs/ext4/ext4_jbd2.c:259 __ext4_handle_dirty_metadata+0x1a2/0x1c0() [153523.892342] Modules linked in: nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_owner xt_conntrack nf_conntrack iptable_filter ip_tables x_tables psmouse serio_raw floppy [153523.892400] CPU: 0 PID: 16129 Comm: dpkg Not tainted 3.13.0-19-generic #40-Ubuntu [153523.892401] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 [153523.892406] 0000000000000009 ffff880000a97ad0 ffffffff81711075 0000000000000000 [153523.892408] ffff880000a97b08 ffffffff810662cd ffff88000aca3d00 0000000000000000 [153523.892410] ffff88000a653000 ffffffff81835280 00000000000012ea ffff880000a97b18 [153523.892412] Call Trace: [153523.892444] [<ffffffff81711075>] dump_stack+0x45/0x56 [153523.892461] [<ffffffff810662cd>] warn_slowpath_common+0x7d/0xa0 [153523.892463] [<ffffffff810663aa>] warn_slowpath_null+0x1a/0x20 [153523.892466] [<ffffffff81268112>] __ext4_handle_dirty_metadata+0x1a2/0x1c0 [153523.892483] [<ffffffff81240eca>] ? ext4_dirty_inode+0x2a/0x60 [153523.892486] [<ffffffff812707d6>] ext4_free_blocks+0x646/0xbf0 [153523.892488] [<ffffffff81261ec5>] ext4_ext_rm_leaf+0x4a5/0x860 [153523.892490] [<ffffffff81260f87>] ? __ext4_ext_check+0x197/0x330 [153523.892492] [<ffffffff812645e0>] ? ext4_ext_remove_space+0xc0/0x7e0 [153523.892494] [<ffffffff8126483c>] ext4_ext_remove_space+0x31c/0x7e0 [153523.892496] [<ffffffff81266bb0>] ext4_ext_truncate+0xb0/0xe0 [153523.892498] [<ffffffff8123f339>] ext4_truncate+0x379/0x3c0 [153523.892500] [<ffffffff8123fef1>] ext4_evict_inode+0x491/0x4f0 [153523.892514] [<ffffffff811d3ac0>] evict+0xb0/0x1b0 [153523.892516] [<ffffffff811d42d5>] iput+0xf5/0x180 [153523.892525] [<ffffffff811c8cfe>] do_unlinkat+0x18e/0x2b0 [153523.892537] [<ffffffff81020d25>] ? syscall_trace_enter+0x145/0x250 [153523.892539] [<ffffffff811c9c56>] SyS_unlink+0x16/0x20 [153523.892545] [<ffffffff81721c7f>] tracesys+0xe1/0xe6 [153523.892547] ---[ end trace 9b25f1487620e754 ]--- [153523.892582] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 [153523.893579] IP: [<ffffffff81256fa1>] __ext4_error_inode+0x31/0x160 [153523.894350] PGD a06c067 PUD 819d067 PMD 0 [153523.894933] Oops: 0000 [#1] SMP [153523.895397] Modules linked in: nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_owner xt_conntrack nf_conntrack iptable_filter ip_tables x_tables psmouse serio_raw floppy [153523.896276] CPU: 0 PID: 16129 Comm: dpkg Tainted: G W 3.13.0-19-generic #40-Ubuntu [153523.896276] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 [153523.896276] task: ffff880009455fc0 ti: ffff880000a96000 task.ti: ffff880000a96000 [153523.896276] RIP: 0010:[<ffffffff81256fa1>] [<ffffffff81256fa1>] __ext4_error_inode+0x31/0x160 [153523.896276] RSP: 0018:ffff880000a97a88 EFLAGS: 00010296 [153523.896276] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000082 [153523.896276] RDX: 00000000000012ea RSI: ffffffff81a6a3e9 RDI: 0000000000000000 [153523.896276] RBP: ffff880000a97b18 R08: ffffffff81a74110 R09: 0000000000000005 [153523.896276] R10: 00000000ffffffe2 R11: ffff880000a977fe R12: 0000000000000082 [153523.896276] R13: ffffffff81835280 R14: 00000000000012ea R15: ffffffff81a74110 [153523.896276] FS: 00007ff43c02b840(0000) GS:ffff88000b800000(0000) knlGS:0000000000000000 [153523.896276] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [153523.896276] CR2: 0000000000000028 CR3: 0000000008df7000 CR4: 00000000000006f0 [153523.896276] Stack: [153523.896276] ffff880000a97a90 0000000000000103 9b25f1487620e754 0000000000002e42 [153523.896276] 000000000000103e 0000000000000092 00000000000001fd ffff88000a653000 [153523.896276] ffff880000a97b18 ffffffff81267c22 ffffffff810662df ffff88000aca3d00 [153523.896276] Call Trace: [153523.896276] [<ffffffff81267c22>] ? ext4_journal_abort_handle+0x42/0xc0 [153523.896276] [<ffffffff810662df>] ? warn_slowpath_common+0x8f/0xa0 [153523.896276] [<ffffffff8126807f>] __ext4_handle_dirty_metadata+0x10f/0x1c0 [153523.896276] [<ffffffff812707d6>] ext4_free_blocks+0x646/0xbf0 [153523.896276] [<ffffffff81261ec5>] ext4_ext_rm_leaf+0x4a5/0x860 [153523.896276] [<ffffffff81260f87>] ? __ext4_ext_check+0x197/0x330 [153523.896276] [<ffffffff812645e0>] ? ext4_ext_remove_space+0xc0/0x7e0 [153523.896276] [<ffffffff8126483c>] ext4_ext_remove_space+0x31c/0x7e0 [153523.896276] [<ffffffff81266bb0>] ext4_ext_truncate+0xb0/0xe0 [153523.896276] [<ffffffff8123f339>] ext4_truncate+0x379/0x3c0 [153523.896276] [<ffffffff8123fef1>] ext4_evict_inode+0x491/0x4f0 [153523.896276] [<ffffffff811d3ac0>] evict+0xb0/0x1b0 [153523.896276] [<ffffffff811d42d5>] iput+0xf5/0x180 [153523.896276] [<ffffffff811c8cfe>] do_unlinkat+0x18e/0x2b0 [153523.896276] [<ffffffff81020d25>] ? syscall_trace_enter+0x145/0x250 [153523.896276] [<ffffffff811c9c56>] SyS_unlink+0x16/0x20 [153523.896276] [<ffffffff81721c7f>] tracesys+0xe1/0xe6 [153523.896276] Code: 48 89 e5 41 57 4d 89 c7 41 56 41 89 d6 41 55 49 89 f5 48 c7 c6 e9 a3 a6 81 41 54 49 89 cc 53 48 89 fb 48 83 ec 68 4c 89 4c 24 60 <48> 8b 47 28 48 8b 57 40 48 8b 80 f8 02 00 00 48 8b 40 68 89 90 [153523.896276] RIP [<ffffffff81256fa1>] __ext4_error_inode+0x31/0x160 [153523.896276] RSP <ffff880000a97a88> [153523.896276] CR2: 0000000000000028 [153523.933140] ---[ end trace 9b25f1487620e755 ]--- $ apt-cache policy linux-image-virtual linux-image-3.13.0-19-generic linux-image-virtual: Installed: 3.13.0.19.23 Candidate: 3.13.0.19.23 Version table: *** 3.13.0.19.23 0 500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 100 /var/lib/dpkg/status linux-image-3.13.0-19-generic: Installed: 3.13.0-19.40 Candidate: 3.13.0-19.40 Version table: *** 3.13.0-19.40 0 500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 100 /var/lib/dpkg/status --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Mar 28 04:55 seq crw-rw---- 1 root audio 116, 33 Mar 28 04:55 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.13.3-0ubuntu1 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: [Errno 2] No such file or directory CRDA: Error: [Errno 2] No such file or directory DistroRelease: Ubuntu 14.04 IwConfig: Error: [Errno 2] No such file or directory Lspci: Error: [Errno 2] No such file or directory Lsusb: Error: [Errno 2] No such file or directory MachineType: Bochs Bochs Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: root=UUID=65dff546-44c1-4418-9703-57fc37ea3296 ro console=tty0 console=ttyS0,38400 quiet ProcVersionSignature: Ubuntu 3.13.0-19.40-generic 3.13.6 RelatedPackageVersions: linux-restricted-modules-3.13.0-19-generic N/A linux-backports-modules-3.13.0-19-generic N/A linux-firmware N/A RfKill: Error: [Errno 2] No such file or directory Tags: trusty Uname: Linux 3.13.0-19-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 01/01/2007 dmi.bios.vendor: Bochs dmi.bios.version: Bochs dmi.chassis.type: 1 dmi.chassis.vendor: Bochs dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr: dmi.product.name: Bochs dmi.sys.vendor: Bochs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1298972/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
