Comment 1 for bug 781792

I suspected automount service on my machine.

Here is my kernel crash/report message:

14185.881413] ------------[ cut here ]------------
[14185.881480] kernel BUG at /build/buildd/linux-2.6.38/fs/dcache.c:947!
[14185.881544] invalid opcode: 0000 [#1] SMP
[14185.881600] last sysfs file: /sys/devices/virtual/hwmon/hwmon0/temp1_input
[14185.881673] CPU 0
[14185.881700] Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc ip6table_filter ip6_tables parport_pc autofs
4 dm_crypt ppdev cryptd aes_x86_64 aes_generic snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_
midi snd_rawmidi snd_seq_midi_event snd_seq rfcomm snd_timer sco bnep snd_seq_device l2cap kvm_intel kvm ipt_MASQUERADE ipt
able_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp ipta
ble_filter ip_tables x_tables bridge stp coretemp uvcvideo r852 sm_common nand arc4 snd ir_lirc_codec lirc_dev iwl3945 iwlc
ore ir_sony_decoder nand_ids rc_rc6_mce ir_jvc_decoder mac80211 ir_rc6_decoder psmouse nand_ecc ir_rc5_decoder acer_wmi spa
rse_keymap videodev ene_ir lp soundcore microcode joydev btusb bluetooth v4l2_compat_ioctl32 mtd serio_raw cfg80211 snd_pag
e_alloc ir_nec_decoder rc_core parport usb_storage uas usbhid hid radeon sdhci_pci ttm firewire_ohci drm_kms_helper drm ahc
i video sdhci firewire_core crc_itu_t i2c_algo_bit libahci tg3
[14185.883329]
[14185.883353] Pid: 8313, comm: automount Not tainted 2.6.38-9-server #43-Ubuntu /eMachine
[14185.883473] RIP: 0010:[<ffffffff81179ba5>] [<ffffffff81179ba5>] shrink_dcache_for_umount_subtree+0x285/0x290
[14185.883585] RSP: 0018:ffff880060c75de8 EFLAGS: 00010296
[14185.883641] RAX: 000000000000006c RBX: ffff88005fb04a1c RCX: 00000000000000d4
[14185.883708] RDX: 0000000000000000 RSI: 0000000000000086 RDI: 0000000000000246
[14185.883777] RBP: ffff880060c75e28 R08: 0000000000000033 R09: 00000000000131f0
[14185.883844] R10: 0000000000000000 R11: 0000000000000001 R12: ffff88005fb04a1c
[14185.883910] R13: ffff88005fb049c0 R14: ffff88005fb04a60 R15: 00007f6aafd2e160
[14185.883978] FS: 00007f6aae00b700(0000) GS:ffff8800bf400000(0000) knlGS:0000000000000000
[14185.884056] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[14185.884112] CR2: 00007f863902b000 CR3: 000000011b7bd000 CR4: 00000000000026e0
[14185.884181] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[14185.884249] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[14185.884318] Process automount (pid: 8313, threadinfo ffff880060c74000, task ffff88008793c4a0)
[14185.884396] Stack:
[14185.884422] ffff8800613f8258 ffffffff81177566 0000000000000000 ffff8800613f8000
[14185.884516] ffff88005fb04a1c ffff88005fb049c0 00007f6aafd2f0b0 00007f6aafd2e160
[14185.884608] ffff880060c75e58 ffffffff8117c4e1 ffff880060c75e48 ffff8800613f8000
[14185.890038] Call Trace:
[14185.891126] [<ffffffff81177566>] ? pollwake+0x56/0x60
[14185.891126] [<ffffffff8117c4e1>] shrink_dcache_for_umount+0x51/0x90
[14185.891126] [<ffffffff8116704c>] generic_shutdown_super+0x2c/0x100
[14185.891126] [<ffffffff811671b6>] kill_anon_super+0x16/0x60
[14185.891126] [<ffffffff81167227>] kill_litter_super+0x27/0x30