linux-ext4 - Re: Oops at shutdown: kernel BUG at fs/ext4/super.c:804!

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Date:	Mon, 9 Sep 2013 18:23:19 +0200
From:	Jan Kara <jack@...e.cz>
To:	Marc Meledandri <m.meledandri@...il.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: Oops at shutdown: kernel BUG at fs/ext4/super.c:804!

On Sun 08-09-13 18:28:40, Marc Meledandri wrote:
> Been seeing this problem at shutdown on 3.10.x kernels.
> 
> I saw a previous similar thread, but it seemed related to NFS whereas this is
> affecting my raid device (dm-0).
  Well, this is likely caused by inodes in filesystem on dm-0 being still
held by someone. Are you exporting dm-0 via NFS? Because there have been
recently bugs in NFS in this area (this patch should have fixed them:
http://www.spinics.net/lists/kernel/msg1592640.html).

								Honza

> 
> [183727.974779] EXT4-fs (dm-0): sb orphan head is 47193630
> [183727.974864] sb_info orphan list:
> [183727.974932]   inode dm-0:47193630 at ffff8802b98950f0: mode
> 100644, nlink 0, next 0
> [183727.975039] ------------[ cut here ]------------
> [183727.975108] kernel BUG at fs/ext4/super.c:804!
> [183727.975177] invalid opcode: 0000 [#1] SMP
> [183727.975341] Modules linked in: btrfs zlib_deflate ufs qnx4 hfsplus
> hfs minix ntfs vfat msdos fat jfs xfs libcrc32c reiserfs ext3 jbd ext2
> efivars cpuid fuse ecb pci_stub parport_pc ppdev lp parport
> cpufreq_userspace cpufreq_stats cpufreq_conservative cpufreq_powersave
> binfmt_misc nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache
> sunrpc usblp hid_microsoft dm_crypt dm_mod loop ecryptfs joydev
> nvidia(PO) snd_hda_codec_realtek snd_hda_intel iTCO_wdt
> iTCO_vendor_support snd_hda_codec mxm_wmi evdev snd_hwdep snd_pcm
> snd_page_alloc coretemp snd_seq snd_timer snd_seq_device psmouse wmi
> serio_raw snd i2c_i801 lpc_ich soundcore mfd_core i2c_core ehci_pci
> ehci_hcd acpi_cpufreq mperf processor button thermal_sys ext4 crc16
> jbd2 mbcache raid456 async_raid6_recov async_memcpy async_pq async_xor
> async_tx xor raid6_pq md_mod sg sr_mod cdrom sd_mod crc_t10dif
> hid_generic usbhid hid crc32c_intel ghash_clmulni_intel ahci libahci
> libata scsi_mod aesni_intel xhci_hcd aes_x86_64 ablk_helper cryptd lrw
> gf128mul glue_helper microcode usbcore usb_common e1000e ptp pps_core
> [last unloaded: vboxdrv]
> [183727.981527] CPU: 2 PID: 24609 Comm: umount Tainted: P           O
> 3.10.10+mfm #1
> [183727.981614] Hardware name:                  /DZ68BC, BIOS
> BCZ6810H.86A.0027.2011.1013.1636 10/13/2011
> [183727.981703] task: ffff8803e7b06810 ti: ffff8803fffe0000 task.ti:
> ffff8803fffe0000
> [183727.981790] RIP: 0010:[<ffffffffa0209b62>]  [<ffffffffa0209b62>]
> ext4_put_super+0x256/0x310 [ext4]
> [183727.981933] RSP: 0018:ffff8803fffe1e78  EFLAGS: 00010287
> [183727.982003] RAX: 0000000000000047 RBX: ffff88040de47000 RCX:
> 00000000d2a7d2a7
> [183727.982088] RDX: 000000000000508c RSI: 0000000000000046 RDI:
> ffffffff817a94a4
> [183727.982174] RBP: ffff88040beb0800 R08: 0000000000000000 R09:
> 0000000000000100
> [183727.982260] R10: 0000000000000100 R11: 0000000000000100 R12:
> ffff88040de47200
> [183727.982345] R13: ffff88040de47200 R14: ffff88040de47190 R15:
> ffff8803fffe1f38
> [183727.982432] FS:  00007fb64bfc17e0(0000) GS:ffff88041f500000(0000)
> knlGS:0000000000000000
> [183727.982519] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [183727.982590] CR2: 00007f3fd0af4f80 CR3: 00000002e46b5000 CR4:
> 00000000000407e0
> [183727.982676] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [183727.982762] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [183727.982847] Stack:
> [183727.982911]  ffff880300000000 ffff8803fffe1e78 ffff88040beb0800
> ffff88040beb08a0
> [183727.983190]  ffffffffa0228fb0 ffff88040ea052a0 ffff88040ea05280
> ffffffff810f9415
> [183727.983468]  ffff88041e59dbc0 0000000000000083 ffff88040ea05280
> ffffffff810f94ab
> [183727.983745] Call Trace:
> [183727.983813]  [<ffffffff810f9415>] ? generic_shutdown_super+0x4d/0xc5
> [183727.983885]  [<ffffffff810f94ab>] ? kill_block_super+0x1e/0x5f
> [183727.983958]  [<ffffffff810f97b2>] ? deactivate_locked_super+0x1b/0x46
> [183727.984030]  [<ffffffff8110e8b0>] ? SyS_umount+0x2d0/0x2f1
> [183727.984102]  [<ffffffff8136b912>] ? system_call_fastpath+0x16/0x1b
> [183727.984173] Code: c7 c7 04 1b 23 a0 49 8b 54 24 78 48 81 c6 20 03
> 00 00 89 04 24 31 c0 e8 de 72 15 e1 4d 8b 24 24 4d 39 ec 0f 84 6e ff
> ff ff eb b7 <0f> 0b 48 8b bd 20 01 00 00 e8 b5 65 f1 e0 48 8b bb 50 02
> 00 00
> [183727.987403] RIP  [<ffffffffa0209b62>] ext4_put_super+0x256/0x310 [ext4]
> [183727.987525]  RSP <ffff8803fffe1e78>
> [183727.987597] ---[ end trace eb19380900af1108 ]---
> [183728.094179] EXT4-fs (sda2): re-mounted. Opts: (null)
> [184000.112039] SysRq : Keyboard mode set to system default
> [184001.631989] SysRq : Terminate All Tasks
> --
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-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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