Public bug reported:
$ lsb_release -rd
Description: Ubuntu 12.10
Release: 12.10
$ uname -a
Linux t520sds 3.5.0-26-generic #42-Ubuntu SMP Fri Mar 8 23:18:20 UTC 2013
x86_64 x86_64 x86_64 GNU/Linux
an attempt to umount a cifs FS resulted in a crash.
here is the relevant part of syslog:
Mar 24 15:44:13 t520sds kernel: [250013.988054] ------------[ cut here
]------------
Mar 24 15:44:13 t520sds kernel: [250013.988160] kernel BUG at
/build/buildd/linux-3.5.0/fs/dcache.c:965!
Mar 24 15:44:13 t520sds kernel: [250013.988293] invalid opcode: 0000 [#1] SMP
Mar 24 15:44:13 t520sds kernel: [250013.988395] CPU 3
Mar 24 15:44:13 t520sds kernel: [250013.988442] Modules linked in: md4 nls_utf8
cifs fscache psmouse deflate zlib_deflate ctr twofish_generic twofish_
x86_64_3way twofish_x86_64 camellia_generic twofish_common camellia_x86_64
serpent_sse2_x86_64 lrw serpent_generic xts gf128mul blowfish_generic blowf
ish_x86_64 blowfish_common cast5 des_generic xcbc rmd160 sha512_generic
crypto_null af_key xfrm_algo bnep rfcomm parport_pc ppdev arc4 joydev snd_hda_
codec_hdmi snd_hda_codec_conexant iwlwifi uvcvideo kvm btusb videobuf2_core
i915 mac80211 bluetooth videodev drm_kms_helper drm snd_hda_intel thinkpad
_acpi snd_hda_codec mei cfg80211 serio_raw snd_hwdep ghash_clmulni_intel
snd_pcm aesni_intel snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq video
buf2_vmalloc wmi cryptd mac_hid videobuf2_memops lpc_ich aes_x86_64
i2c_algo_bit snd_timer snd_seq_device nvram tpm_tis snd video soundcore
snd_page_a
lloc binfmt_misc microcode coretemp lp parport ahci libahci firewire_ohci
sdhci_pci sdhci firewire_core crc_itu_t e1000e [last u
Mar 24 15:44:13 t520sds kernel: nloaded: psmouse]
Mar 24 15:44:13 t520sds kernel: [250013.990809]
Mar 24 15:44:13 t520sds kernel: [250013.990825] Pid: 18617, comm: umount
Tainted: G W 3.5.0-26-generic #42-Ubuntu LENOVO 42404EU/42404EU
Mar 24 15:44:13 t520sds kernel: [250013.991040] RIP: 0010:[<ffffffff81197997>]
[<ffffffff81197997>] shrink_dcache_for_umount_subtree+0x1c7/0x1d0
Mar 24 15:44:13 t520sds kernel: [250013.991250] RSP: 0018:ffff8801a8345dc8
EFLAGS: 00010296
Mar 24 15:44:13 t520sds kernel: [250013.991323] RAX: 0000000000000067 RBX:
ffff8801f123b0c0 RCX: 000000000000fd7f
Mar 24 15:44:13 t520sds kernel: [250013.991415] RDX: 000000000000fd7f RSI:
0000000000000086 RDI: 0000000000000246
Mar 24 15:44:13 t520sds kernel: [250013.991507] RBP: ffff8801a8345de8 R08:
0000000000000baa R09: 2931282065737520
Mar 24 15:44:13 t520sds kernel: [250013.991597] R10: 6e756f6d6e755b20 R11:
66696320666f2074 R12: ffff880100b85d80
Mar 24 15:44:13 t520sds kernel: [250013.991689] R13: ffffffffa05ee900 R14:
ffff8801cd7c2720 R15: ffff8801cd7c2748
Mar 24 15:44:13 t520sds kernel: [250013.991781] FS: 00007f6bed98b800(0000)
GS:ffff88021dcc0000(0000) knlGS:0000000000000000
Mar 24 15:44:13 t520sds kernel: [250013.991884] CS: 0010 DS: 0000 ES: 0000
CR0: 000000008005003b
Mar 24 15:44:13 t520sds kernel: [250013.991963] CR2: 00000000007b2e10 CR3:
00000001b294c000 CR4: 00000000000407e0
Mar 24 15:44:13 t520sds kernel: [250013.992055] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Mar 24 15:44:13 t520sds kernel: [250013.992146] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Mar 24 15:44:13 t520sds kernel: [250013.992239] Process umount (pid: 18617,
threadinfo ffff8801a8344000, task ffff8800030e0000)
Mar 24 15:44:13 t520sds kernel: [250013.992352] Stack:
Mar 24 15:44:13 t520sds kernel: [250013.992383] ffff88015d1cfec0
ffffffff816768ab ffff88015d1cfc00 ffffffffa0603000
Mar 24 15:44:13 t520sds kernel: [250013.992496] ffff8801a8345e08
ffffffff81199b53 ffff8800030e0000 ffff88015d1cfc00
Mar 24 15:44:13 t520sds kernel: [250013.992607] ffff8801a8345e38
ffffffff81184a3c ffff88020f525c00 0000000000000017
Mar 24 15:44:13 t520sds kernel: [250013.992724] Call Trace:
Mar 24 15:44:13 t520sds kernel: [250013.992771] [<ffffffff816768ab>] ?
__slab_free+0xee/0x25e
Mar 24 15:44:13 t520sds kernel: [250013.992849] [<ffffffff81199b53>]
shrink_dcache_for_umount+0x33/0x60
Mar 24 15:44:13 t520sds kernel: [250013.992936] [<ffffffff81184a3c>]
generic_shutdown_super+0x2c/0xf0
Mar 24 15:44:13 t520sds kernel: [250013.993019] [<ffffffff81184b96>]
kill_anon_super+0x16/0x30
Mar 24 15:44:13 t520sds kernel: [250013.993101] [<ffffffffa05be24a>]
cifs_kill_sb+0x1a/0x30 [cifs]
Mar 24 15:44:13 t520sds kernel: [250013.993182] [<ffffffff811844b7>]
deactivate_locked_super+0x57/0x90
Mar 24 15:44:13 t520sds kernel: [250013.993266] [<ffffffff8118472e>]
deactivate_super+0x4e/0x70
Mar 24 15:44:13 t520sds kernel: [250013.993344] [<ffffffff811a0a5e>]
mntput_no_expire+0xfe/0x160
Mar 24 15:44:13 t520sds kernel: [250013.993423] [<ffffffff811a18b6>]
sys_umount+0x76/0x3a0
Mar 24 15:44:13 t520sds kernel: [250013.993498] [<ffffffff816890e9>]
system_call_fastpath+0x16/0x1b
Mar 24 15:44:13 t520sds kernel: [250013.993576] Code: 00 00 48 8b 40 28 4c 8b
08 48 8b 43 30 48 85 c0 74 1b 48 8b 50 40 48 89 34 24 48 c7 c7 e0 cc a1 81 48
89 de 31 c0 e8 f8 bf 4d 00 <0f> 0b 31 d2 eb e5 0f 0b 90 55 48 89 e5 41 54 53 66
66 66 66 90
Mar 24 15:44:13 t520sds kernel: [250013.994090] RIP [<ffffffff81197997>]
shrink_dcache_for_umount_subtree+0x1c7/0x1d0
Mar 24 15:44:13 t520sds kernel: [250013.994196] RSP <ffff8801a8345dc8>
Mar 24 15:44:13 t520sds kernel: [250014.011537] ---[ end trace 7bae219adab8e7a5
]---
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-26-generic 3.5.0-26.42
ProcVersionSignature: Ubuntu 3.5.0-26.42-generic 3.5.7.6
Uname: Linux 3.5.0-26-generic x86_64
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: sds 2439 F.... pulseaudio
Date: Sun Mar 24 15:56:18 2013
HibernationDevice: RESUME=UUID=901a531f-78b8-4566-aeb7-2215737ec4dd
InstallationDate: Installed on 2011-11-01 (509 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: LENOVO 42404EU
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-26-generic
root=UUID=38878cd7-8edb-411f-b50d-f004d003365b ro quiet splash
enable_mtrr_cleanup mtrr_spare_reg_nr=1 mtrr_gran_size=32M mtrr_chunk_size=128M
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.5.0-26-generic N/A
linux-backports-modules-3.5.0-26-generic N/A
linux-firmware 1.95
SourcePackage: linux
UpgradeStatus: Upgraded to quantal on 2013-03-21 (2 days ago)
dmi.bios.date: 07/11/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8AET49WW (1.29 )
dmi.board.asset.tag: Not Available
dmi.board.name: 42404EU
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr8AET49WW(1.29):bd07/11/2011:svnLENOVO:pn42404EU:pvrThinkPadT520:rvnLENOVO:rn42404EU:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 42404EU
dmi.product.version: ThinkPad T520
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug quantal running-unity
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https://bugs.launchpad.net/bugs/1159508
Title:
kernel crash on umount cifs
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