Bug#692104: linux-image-3.2.0-3-amd64: NULL pointer dereference in ext4fs
Hello,
On 02-11-12 15:33, Ben Hutchings wrote:
I don't know what exactly triggered this, but the result was that my /home
was no longer accessible after this event. My root filesystem was still
okay.
I assume this means it was no longer accessible until the next boot.
Oh yes, definitely. Sorry for not being clear.
Also, this has just happened again. This time, after me not having
touched the laptop for over ten hours. I'm starting to wonder whether my
filesystem is corrupted. I'll make an LVM snapshot and then do a full fsck.
I'll attach the backtrace. Seems to be the same like this morning.
Wilmer v/d Gaast.
--
+-------- .''`. - -- ---+ + - -- --- ---- ----- ------+
| wilmer : :' : gaast.net | | OSS Programmer www.bitlbee.org |
| lintux `. `~' debian.org | | Full-time geek wilmer.gaast.net |
+--- -- - ` ---------------+ +------ ----- ---- --- -- - +
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffffa016be4b>] ext4_mb_good_group+0x39/0xcd [ext4]
PGD 12ac22067 PUD 12de5f067 PMD 0
Oops: 0000 [#1] SMP
CPU 0
Modules linked in: parport_pc ppdev lp parport bnep rfcomm bluetooth cpufreq_conservative cpufreq_userspace cpufreq_powersave cpufreq_stats uinput fuse nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 jbd ext2 loop kvm_intel kvm snd_hda_codec_conexant snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm arc4 snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi iwlwifi snd_seq psmouse snd_seq_device iTCO_wdt pcspkr serio_raw snd_timer evdev coretemp iTCO_vendor_support i2c_i801 mac80211 battery thinkpad_acpi i915 acpi_cpufreq tpm_tis nvram cfg80211 tpm tpm_bios rfkill ac power_supply snd drm_kms_helper drm mperf i2c_algo_bit wmi i2c_core video soundcore processor button ext4 crc16 jbd2 mbcache sha256_generic cryptd aes_x86_64 aes_generic cbc dm_crypt dm_mod sg sd_mod crc_t10dif thermal thermal_sys ahci libahci uhci_hcd libata ehci_hcd scsi_mod usbcore usb_common e1000e [last unloaded: scsi_wait_scan]
Pid: 3848, comm: firefox-bin Not tainted 3.2.0-3-amd64 #1 LENOVO 7465CTO/7465CTO
RIP: 0010:[<ffffffffa016be4b>] [<ffffffffa016be4b>] ext4_mb_good_group+0x39/0xcd [ext4]
RSP: 0018:ffff88012deed8c8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8800b89248d8 RCX: 0000000000000002
RDX: ffff88012ac5e000 RSI: 0000000000000058 RDI: ffff8801363c0400
RBP: 0000000000000158 R08: ffff880116a0a458 R09: ffff880116a0a458
R10: ffff880116a0a458 R11: ffff880116a0a458 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8801363c0400 R15: 0000000000000000
FS: 00007fa73bafe700(0000) GS:ffff88013bc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000012d2c0000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process firefox-bin (pid: 3848, threadinfo ffff88012deec000, task ffff880132e271e0)
Stack:
ffff880116a0a458 ffff8800b89248d8 ffff880132e97800 ffff8801363c0400
0000000000000000 0000000000000150 0000000000000158 ffffffffa016d397
0000000300000000 ffff880132e97af8 00000000ffffffff ffff880132e271e0
Call Trace:
[<ffffffffa016d397>] ? ext4_mb_regular_allocator+0x110/0x264 [ext4]
[<ffffffff81036457>] ? should_resched+0x5/0x23
[<ffffffffa016e50a>] ? ext4_mb_new_blocks+0x1c2/0x403 [ext4]
[<ffffffffa016900f>] ? __ext4_handle_dirty_metadata+0xd7/0xe8 [ext4]
[<ffffffffa0171eab>] ? ext4_alloc_branch+0x1ab/0x468 [ext4]
[<ffffffffa012fbf1>] ? jbd2_journal_stop+0x209/0x21b [jbd2]
[<ffffffffa0172922>] ? ext4_ind_map_blocks+0x289/0x4a6 [ext4]
[<ffffffffa01484be>] ? ext4_da_write_end+0x1f1/0x232 [ext4]
[<ffffffff810bd5d9>] ? release_pages+0x68/0x14d
[<ffffffff810bd5d9>] ? release_pages+0x68/0x14d
[<ffffffff811ad099>] ? __lookup_tag+0xb6/0x120
[<ffffffffa0145637>] ? ext4_map_blocks+0x114/0x1f0 [ext4]
[<ffffffff811ad80a>] ? radix_tree_gang_lookup_tag_slot+0x77/0x98
[<ffffffff810f3696>] ? mem_cgroup_add_lru_list+0xd/0xaa
[<ffffffffa014858d>] ? mpage_da_map_and_submit+0x8e/0x2f9 [ext4]
[<ffffffffa0148adf>] ? write_cache_pages_da+0x214/0x2c5 [ext4]
[<ffffffffa0148e32>] ? ext4_da_writepages+0x2a2/0x45b [ext4]
[<ffffffff810b4cd0>] ? __filemap_fdatawrite_range+0x4b/0x50
[<ffffffffa01415aa>] ? ext4_release_file+0x1b/0x93 [ext4]
[<ffffffff810fa30d>] ? fput+0xf9/0x1a1
[<ffffffff810f8036>] ? filp_close+0x62/0x6a
[<ffffffff810f80cc>] ? sys_close+0x8e/0xcb
[<ffffffff8134fc92>] ? system_call_fastpath+0x16/0x1b
Code: 53 48 89 fb 41 52 4c 8b 77 08 49 8b 86 b0 02 00 00 4c 89 f7 44 8b b8 20 03 00 00 e8 fd dc ff ff 41 83 fd 03 49 89 c4 76 02 0f 0b <48> 8b 00 a8 01 74 0e 89 ee 4c 89 f7 e8 18 fe ff ff 85 c0 75 69
RIP [<ffffffffa016be4b>] ext4_mb_good_group+0x39/0xcd [ext4]
RSP <ffff88012deed8c8>
CR2: 0000000000000000
---[ end trace 4be76e42fc66006a ]---
Reply to: