linux-kernel - [BUG] Btrfs: Corrupted root filesystem

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Date:	Tue, 05 Jul 2011 10:25:36 +0300
From:	Tarkan Erimer <tarkan@...knetserver.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [BUG] Btrfs: Corrupted root filesystem

At the weekend; I updated my Linux Box. After the update, I rebooted my 
box as usually. When I tried to log in, X or KDM was frozen. I had no 
choice but hard reset. After the hard reset; when powered on again, I 
hit the below btrfs bug :

[   22.588566] udev[1411]: starting version 166
[   23.343133] device-mapper: uevent: version 1.0.3
[   23.343327] device-mapper: ioctl: 4.18.0-ioctl (2010-06-29) 
initialised: dm-devel@...hat.com
[  183.992833] Btrfs loaded
[  184.000282] device fsid 6e4eba2e662daff1-956db2b6443294be devid 1 
transid 156509 /dev/sda1
[  184.026900] parent transid verify failed on 712880873472 wanted 
156509 found 156065
[  184.027365] parent transid verify failed on 712880873472 wanted 
156509 found 156065
[  184.033328] parent transid verify failed on 712880873472 wanted 
156509 found 156065
[  184.054422] parent transid verify failed on 485440565248 wanted 
156055 found 156498
[  184.054895] parent transid verify failed on 485440565248 wanted 
156055 found 156498
[  184.055045] parent transid verify failed on 485440565248 wanted 
156055 found 156498
[  184.058274] parent transid verify failed on 485440565248 wanted 
156055 found 156498
[  184.058281] parent transid verify failed on 485440565248 wanted 
156055 found 156498
[  184.058306] ------------[ cut here ]------------
[  184.058312] kernel BUG at 
/usr/src/packages/BUILD/kernel-default-2.6.37.1/linux-2.6.37/fs/btrfs/disk-io.c:1004!
[  184.058320] invalid opcode: 0000 [#1] SMP
[  184.058326] last sysfs file: /sys/devices/virtual/bdi/btrfs-1/uevent
[  184.058332] CPU 0
[  184.058335] Modules linked in: btrfs zlib_deflate dm_mod nls_utf8 
usb_storage ata_generic parport_pc parport arc4 ecb acpi_cpufreq mperf 
fan thermal nfs nfs_acl lockd fscache auth_rpcgss sunrpc nls_iso8859_1 
nls_cp437 af_packet st usbhid uhci_hcd processor sky2 sg sr_mod button 
cdrom ehci_hcd thermal_sys usbcore edd squashfs loop
[  184.058384]
[  184.058388] Pid: 1975, comm: mount Not tainted 2.6.37.1-1.2-default 
#1 LENOVO INVALID/To be filled by O.E.M.
[  184.058400] RIP: 0010:[<ffffffffa02ac767>]  [<ffffffffa02ac767>] 
find_and_setup_root+0xf7/0x100 [btrfs]
[  184.058427] RSP: 0018:ffff88006b851c48  EFLAGS: 00010282
[  184.058429] RAX: 00000000fffffffe RBX: ffff88006e318800 RCX: 
0000000000000001
[  184.058432] RDX: 00000000fffffffb RSI: ffff880072e0bf40 RDI: 
ffff8800669f6140
[  184.058435] RBP: ffff88006e318000 R08: 0000000000000000 R09: 
0000000000000000
[  184.058437] R10: 0000000000000001 R11: 0000000000000000 R12: 
0000000000000002
[  184.058440] R13: 00000000ffffffea R14: ffff880066850000 R15: 
ffff88006e318000
[  184.058443] FS:  00007f15180bd7e0(0000) GS:ffff880075600000(0000) 
knlGS:0000000000000000
[  184.058446] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  184.058448] CR2: 00007f236f078ca0 CR3: 000000006e4fb000 CR4: 
00000000000406f0
[  184.058451] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
0000000000000000
[  184.058453] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 
0000000000000400
[  184.058456] Process mount (pid: 1975, threadinfo ffff88006b850000, 
task ffff88006b474700)
[  184.058459] Stack:
[  184.058460]  0000000000000002 ffffffffa02abbf5 ffff88006e76e000 
ffff880066851d18
[  184.058465]  ffff88006e554800 ffffffffa02adbd7 0000000000000003 
ffff88006b851d18
[  184.058469]  ffff88006b851dd8 ffffffff817a6279 ffff88006e318800 
ffff88006e76e800
[  184.058473] Call Trace:
[  184.058509]  [<ffffffffa02adbd7>] open_ctree+0xfc7/0x16e0 [btrfs]
[  184.058536]  [<ffffffffa028de71>] btrfs_mount+0x411/0x520 [btrfs]
[  184.058544]  [<ffffffff8114a529>] vfs_kern_mount+0x89/0x250
[  184.058550]  [<ffffffff8114a763>] do_kern_mount+0x53/0x130
[  184.058555]  [<ffffffff81164cc2>] do_mount+0x1e2/0x210
[  184.058560]  [<ffffffff81164dda>] sys_mount+0x9a/0xf0
[  184.058566]  [<ffffffff81002e4b>] system_call_fastpath+0x16/0x1b
[  184.058571]  [<00007f15175abe4a>] 0x7f15175abe4a
[  184.058573] Code: 45 10 31 c0 eb 93 66 0f 1f 44 00 00 8b 95 a8 02 00 
00 eb b8 48 8b 7d 00 e8 47 71 02 00 b8 fb ff ff ff e9 72 ff ff ff 31 ff 
eb ed <0f> 0b 0f 1f 80 00 00 00 00 48 83 ec 58 48 89 6c 24 30 48 8b 2d
[  184.058597] RIP  [<ffffffffa02ac767>] find_and_setup_root+0xf7/0x100 
[btrfs]
[  184.058607]  RSP <ffff88006b851c48>
[  184.058609] ---[ end trace 4e464313e039d2d9 ]---
[  208.206581] JFS: nTxBlock = 8192, nTxLock = 65536




So, this bug ate all of my root file system :-\ When mounting or running 
btrfsck, the same error occurs. I tried with 2.6.37-38 and 3.0-rc5 
kernels and the result is all the same. It looks like a long time bug 
that sits in btrfs code. I hope the above error message can help. 
Because, I had to re-format my disk :-\


Tarkan











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