Comment 3 for bug 387073

Same here on 2.6.31-7-generic
with tmpdir pointing to a folder in encrypted home

[ 2601.283398] BUG: unable to handle kernel NULL pointer dereference at 00000148
[ 2601.283411] IP: [<c01f716d>] touch_atime+0x1d/0x130
[ 2601.283428] *pde = bed72067
[ 2601.283435] Oops: 0000 [#5] SMP
[ 2601.283443] last sysfs file: /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/ieee80211/phy0/rfkill2/uevent
[ 2601.283451] Modules linked in: tun cbc aes_i586 aes_generic dm_crypt snd_hda_codec_analog arc4 snd_hda_intel snd_hda_codec ecb snd_pcm_oss snd_mixer_oss snd_pcm pcmcia snd_seq_dummy iwlagn snd_seq_oss iwlcore yenta_socket snd_seq_midi snd_rawmidi thinkpad_acpi rsrc_nonstatic sdhci_pci snd_seq_midi_event mac80211 sdhci snd_seq pcmcia_core led_class psmouse snd_timer snd_seq_device nvram cfg80211 serio_raw snd soundcore snd_page_alloc btusb ohci1394 ieee1394 e1000e fbcon tileblit font bitblit softcursor i915 drm i2c_algo_bit video output intel_agp agpgart
[ 2601.283558]
[ 2601.283566] Pid: 3395, comm: mutt Tainted: G D (2.6.31-7-generic #27-Ubuntu) 7675H7U
[ 2601.283572] EIP: 0060:[<c01f716d>] EFLAGS: 00010246 CPU: 0
[ 2601.283580] EIP is at touch_atime+0x1d/0x130
[ 2601.283586] EAX: 00000000 EBX: f6bfe380 ECX: f69d2800 EDX: 00000000
[ 2601.283592] ESI: 00000000 EDI: f5985280 EBP: f5953e9c ESP: f5953e8c
[ 2601.283597] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 2601.283604] Process mutt (pid: 3395, ti=f5952000 task=f65fcb60 task.ti=f5952000)
[ 2601.283609] Stack:
[ 2601.283613] 00001000 f5953ecc 0000040b f5985280 f5953ebc c02a08eb 00000000 00000000
[ 2601.283629] <0> f5985280 c05842a0 f5985280 f5953ecc f5953f64 c01e459c 00000000 00000000
[ 2601.283645] <0> f5953f08 c01ca881 00000000 00000001 ffffffff f5985280 00000000 00000000
[ 2601.283664] Call Trace:
[ 2601.283677] [<c02a08eb>] ? ecryptfs_read_update_atime+0x4b/0x70
[ 2601.283686] [<c01e459c>] ? do_sync_read+0xbc/0x100
[ 2601.283696] [<c01ca881>] ? vma_merge+0x1b1/0x2a0
[ 2601.283708] [<c0157920>] ? autoremove_wake_function+0x0/0x40
[ 2601.283718] [<c02c4c4f>] ? security_file_permission+0xf/0x20
[ 2601.283726] [<c01e463f>] ? rw_verify_area+0x5f/0xe0
[ 2601.283734] [<c01e4b97>] ? vfs_read+0x97/0x190
[ 2601.283742] [<c01e44e0>] ? do_sync_read+0x0/0x100
[ 2601.283750] [<c01e51ad>] ? sys_read+0x3d/0x70
[ 2601.283758] [<c010334c>] ? syscall_call+0x7/0xb
[ 2601.283763] Code: 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 83 ec 10 89 5d f4 89 c3 89 75 f8 89 7d fc 8b 72 10 e8 97 2f 00 00 85 c0 75 10 <f6> 86 48 01 00 00 02 74 1a 89 d8 e8 c3 30 00 00 8b 5d f4 8b 75
[ 2601.283860] EIP: [<c01f716d>] touch_atime+0x1d/0x130 SS:ESP 0068:f5953e8c
[ 2601.283872] CR2: 0000000000000148
[ 2601.283879] ---[ end trace 5e5c2e659e401ce7 ]---