[Bug 422457] [NEW] plasma-desktop crashes sometimes using ecryptfs home directory

[Martin Nowack]

Public bug reported:

Binary package hint: kdebase

Plasma-desktop sometimes is suddenly stuck (ps -A defunct). It happens
in arbitrary situations.

After killing and restarting it works again. The reason seam to be the
encrypted home directory.

With following dmesg output:

[85213.837631] Modules linked in: cbc cryptd aes_x86_64 aes_generic binfmt_misc bridge stp bnep lp snd_hda_codec_conexant snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss arc4 ecb snd_seq_midi snd_rawmidi snd_seq_midi_event iwlagn mmc_block snd_seq iwlcore uvcvideo joydev pcmcia snd_timer sdhci_pci snd_seq_device videodev thinkpad_acpi yenta_socket mac80211 sdhci psmouse rsrc_nonstatic v4l1_compat snd v4l2_compat_ioctl32 btusb ricoh_mmc serio_raw led_class pcmcia_core soundcore heci(C) ppdev cfg80211 snd_page_alloc parport_pc nvram parport ohci1394 ieee1394 e1000e usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor i915 drm i2c_algo_bit video output intel_agp
[85213.837759] Pid: 3709, comm: plasma-desktop Tainted: G         C 2.6.31-8-server #28-Ubuntu 2055W2G
[85213.837765] RIP: 0010:[<ffffffff8112e320>]  [<ffffffff8112e320>] touch_atime+0x20/0x150
[85213.837777] RSP: 0018:ffff880116537d58  EFLAGS: 00010246
[85213.837783] RAX: 0000000000000000 RBX: ffff880133d04300 RCX: 000000004a9ce454
[85213.837789] RDX: ffff880133506c00 RSI: ffff88011f4b0000 RDI: ffff880133d04300
[85213.837795] RBP: ffff880116537d88 R08: 0000000000000003 R09: ffffea0003f26728
[85213.837801] R10: 0000000000000022 R11: 0000000000000001 R12: 0000000000000000
[85213.837807] R13: 0000000000000016 R14: ffff880116537f48 R15: 0000000000004000
[85213.837814] FS:  00007fdd0ee03750(0000) GS:ffff880028023000(0000) knlGS:0000000000000000
[85213.837821] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[85213.837827] CR2: 0000000000000220 CR3: 0000000116509000 CR4: 00000000000006b0
[85213.837833] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[85213.837839] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[85213.837846] Process plasma-desktop (pid: 3709, threadinfo ffff880116536000, task ffff8801208d8000)
[85213.837851] Stack:
[85213.837854]  ffff880135520340 ffff880116537dc8 ffff88006951c300 ffff880116537eb8
[85213.837864] <0> ffff880116537dc8 ffff88006951c300 ffff880116537db8 ffffffff811f07b7
[85213.837874] <0> ffff880116537df8 ffff880116537dc8 ffff88006951c300 ffff880116537eb8
[85213.837886] Call Trace:
[85213.837898]  [<ffffffff811f07b7>] ecryptfs_read_update_atime+0x47/0x70
[85213.837909]  [<ffffffff81119062>] do_sync_read+0xf2/0x130
[85213.837919]  [<ffffffff810735e0>] ? autoremove_wake_function+0x0/0x40
[85213.837931]  [<ffffffff81219901>] ? security_file_permission+0x11/0x20
[85213.837939]  [<ffffffff81119645>] vfs_read+0xb5/0x1a0
[85213.837946]  [<ffffffff81119c1c>] sys_read+0x4c/0x80
[85213.837957]  [<ffffffff81011fc2>] system_call_fastpath+0x16/0x1b
[85213.837962] Code: 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 48 83 ec 30 48 89 5d f0 4c 89 65 f8 48 89 fb 4c 8b 66 10 e8 54 36 00 00 85 c0 75 13 <41> f6 84 24 20 02 00 00 02 74 15 48 89 df e8 9d 37 00 00 48 8b
[85213.838046] RIP  [<ffffffff8112e320>] touch_atime+0x20/0x150
[85213.838055]  RSP <ffff880116537d58>
[85213.838059] CR2: 0000000000000220
[85213.838066] ---[ end trace 84dac234e53ed87b ]---

I updated my system from 9.04 to current 9.10 alpha.

kdebase:
  Installed: (none)
  Candidate: 4:4.3.0-0ubuntu3
  Version table:
     4:4.3.0-0ubuntu3 0
        500 http://archive.ubuntu.com karmic/main Packages


Please ask if other information are needed.

** Affects: kdebase (Ubuntu)
     Importance: Undecided
         Status: New

-- 
plasma-desktop crashes sometimes using ecryptfs home directory
https://bugs.launchpad.net/bugs/422457
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