compiz team mailing list archive

Thread
Date
[Bug 904086] [NEW] compiz kernel null pointer mutex_lock

To: compiz@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <904086@xxxxxxxxxxxxxxxxxx>
Date: Wed, 14 Dec 2011 13:27:37 -0000
Reply-to: Bug 904086 <904086@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
You have been subscribed to a public bug:

First, this bug is similar a bunch of other bugs, but I wasn't sure it was identical to any of the existing ones so I hope someone else can merge it for me if it is in fact a duplicate.
Second, this appears to be a bug in either compiz or the kernel. 

I'm using ubuntu 11.10 everything was up to date at the time the crash
occurred.

Compiz info:
compiz:
  Installed: (none)
  Candidate: 1:0.9.6+bzr20110929-0ubuntu6
  Version table:
     1:0.9.6+bzr20110929-0ubuntu6 0
        500 http://mirror.cc.columbia.edu/pub/linux/ubuntu/archive/ oneiric-updates/main amd64 Packages
     1:0.9.6+bzr20110929-0ubuntu3 0
        500 http://mirror.cc.columbia.edu/pub/linux/ubuntu/archive/ oneiric/main amd64 Packages

Addressing what I expected to happen and what happened.  I'm not
actually sure, as I wasn't using the computer at the time.  But best I
can tell it just quit working on its own.  It was displaying the
screensaver at the time, glslideshow in xscreensaver, and it was making
the image to display (I make a clock display in imagemagick and use
glslideshow to display it), but I don't think it was doing anything
else.  Obviously this might be hard to reproduce.  Here's what I got out
of /var/log/syslog, from where it starts to look suspicious to where the
log ended on that date (I hard restarted the machine a few days later).

Dec 10 06:07:43 poseidon kernel: [1032171.425641] compiz[28802]: segfault at 13460 ip 0000000000013460 sp 00007fff39726f28 error 14 in compiz[400000+7c000]
Dec 10 06:07:43 poseidon kernel: [1032171.427127] BUG: unable to handle kernel NULL pointer dereference at 0000000000000040
Dec 10 06:07:43 poseidon kernel: [1032171.427130] IP: [<ffffffff815e8f10>] mutex_lock+0x20/0x50
Dec 10 06:07:43 poseidon kernel: [1032171.427138] PGD 0 
Dec 10 06:07:43 poseidon kernel: [1032171.427139] Oops: 0002 [#1] SMP 
Dec 10 06:07:43 poseidon kernel: [1032171.427142] CPU 3 
Dec 10 06:07:43 poseidon kernel: [1032171.427143] Modules linked in: parport_pc ppdev nls_iso8859_1 nls_cp437 btrfs libcrc32c ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs joydev hidp bnep rfcomm pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv vesafb zfs(P) zcommon(P) znvpair(P) zavl(P) zunicode(P) spl zlib_deflate binfmt_misc snd_hda_codec_hdmi btusb bluetooth snd_seq_midi snd_rawmidi snd_seq_midi_event snd_hda_codec_realtek snd_seq snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer arc4 snd_seq_device snd rt61pci crc_itu_t rt2x00pci rt2x00lib mac80211 cfg80211 soundcore snd_page_alloc serio_raw eeprom_93cx6 i7core_edac nvidia(P) edac_core mxm_wmi wmi lp parport usb_storage uas usbhid hid ahci libahci pata_jmicron
Dec 10 06:07:43 poseidon kernel: [1032171.427179] 
Dec 10 06:07:43 poseidon kernel: [1032171.427182] Pid: 28802, comm: compiz Tainted: P            3.0.0-13-generic #22-Ubuntu Gigabyte Technology Co., Ltd. EX58-UD3R/EX58-UD3R
Dec 10 06:07:43 poseidon kernel: [1032171.427185] RIP: 0010:[<ffffffff815e8f10>]  [<ffffffff815e8f10>] mutex_lock+0x20/0x50
Dec 10 06:07:43 poseidon kernel: [1032171.427188] RSP: 0000:ffff8801c3a03b68  EFLAGS: 00010246
Dec 10 06:07:43 poseidon kernel: [1032171.427190] RAX: 0000000000000000 RBX: 0000000000000040 RCX: ffff8801c2a69ec0
Dec 10 06:07:43 poseidon kernel: [1032171.427191] RDX: ffff8801c3a03fd8 RSI: ffff8801b5e21ee0 RDI: 0000000000000040
Dec 10 06:07:43 poseidon kernel: [1032171.427193] RBP: ffff8801c3a03b78 R08: 00007f9c9af1f000 R09: dead000000100100
Dec 10 06:07:43 poseidon kernel: [1032171.427194] R10: dead000000200200 R11: dead000000100100 R12: 0000000000000040
Dec 10 06:07:43 poseidon kernel: [1032171.427196] R13: ffff8801c2adf600 R14: 0000000000000000 R15: 0000000000000000
Dec 10 06:07:43 poseidon kernel: [1032171.427198] FS:  0000000000000000(0000) GS:ffff8801cfcc0000(0000) knlGS:0000000000000000
Dec 10 06:07:43 poseidon kernel: [1032171.427200] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Dec 10 06:07:43 poseidon kernel: [1032171.427201] CR2: 0000000000000040 CR3: 00000001b632d000 CR4: 00000000000006e0
Dec 10 06:07:43 poseidon kernel: [1032171.427203] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Dec 10 06:07:43 poseidon kernel: [1032171.427204] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Dec 10 06:07:43 poseidon kernel: [1032171.427206] Process compiz (pid: 28802, threadinfo ffff8801c3a02000, task ffff8801a19c5c80)
Dec 10 06:07:43 poseidon kernel: [1032171.427207] Stack:
Dec 10 06:07:43 poseidon kernel: [1032171.427209]  ffff88019eb8c210 0000000000000040 ffff8801c3a03ba8 ffffffff81133cbf
Dec 10 06:07:43 poseidon kernel: [1032171.427211]  ffff88019eb8c210 ffff88019eb8c160 0000000000000000 ffff8801c3a03c08
Dec 10 06:07:43 poseidon kernel: [1032171.427214]  ffff8801c3a03bf8 ffffffff8112cdb4 ffff8801c3a03c70 00007f9c91b18000
Dec 10 06:07:43 poseidon kernel: [1032171.427216] Call Trace:
Dec 10 06:07:43 poseidon kernel: [1032171.427221]  [<ffffffff81133cbf>] unlink_file_vma+0x3f/0x70
Dec 10 06:07:43 poseidon kernel: [1032171.427224]  [<ffffffff8112cdb4>] free_pgtables+0xb4/0x120
Dec 10 06:07:43 poseidon kernel: [1032171.427227]  [<ffffffff811363f6>] exit_mmap+0xc6/0x140
Dec 10 06:07:43 poseidon kernel: [1032171.427230]  [<ffffffff8105c572>] mmput.part.21+0x42/0x130
Dec 10 06:07:43 poseidon kernel: [1032171.427232]  [<ffffffff8105c689>] mmput+0x29/0x30
Dec 10 06:07:43 poseidon kernel: [1032171.427235]  [<ffffffff81062eda>] exit_mm+0x12a/0x160
Dec 10 06:07:43 poseidon kernel: [1032171.427238]  [<ffffffff810d86b5>] ? taskstats_exit+0x45/0x240
Dec 10 06:07:43 poseidon kernel: [1032171.427241]  [<ffffffff815ea6c5>] ? _raw_spin_lock_irq+0x15/0x20
Dec 10 06:07:43 poseidon kernel: [1032171.427243]  [<ffffffff8106308e>] do_exit+0x17e/0x440
Dec 10 06:07:43 poseidon kernel: [1032171.427246]  [<ffffffff810634f4>] do_group_exit+0x44/0xa0
Dec 10 06:07:43 poseidon kernel: [1032171.427249]  [<ffffffff8107417d>] get_signal_to_deliver+0x27d/0x3f0
Dec 10 06:07:43 poseidon kernel: [1032171.427254]  [<ffffffff8100a7e6>] do_signal+0x56/0x180
Dec 10 06:07:43 poseidon kernel: [1032171.427256]  [<ffffffff815d4039>] ? printk+0x51/0x53
Dec 10 06:07:43 poseidon kernel: [1032171.427260]  [<ffffffff812830b3>] ? security_file_permission+0x93/0xb0
Dec 10 06:07:43 poseidon kernel: [1032171.427263]  [<ffffffff81167601>] ? rw_verify_area+0x61/0xf0
Dec 10 06:07:43 poseidon kernel: [1032171.427266]  [<ffffffff81167b95>] ? vfs_read+0x165/0x180
Dec 10 06:07:43 poseidon kernel: [1032171.427268]  [<ffffffff8100aad5>] do_notify_resume+0x65/0x80
Dec 10 06:07:43 poseidon kernel: [1032171.427270]  [<ffffffff815eaa1c>] retint_signal+0x48/0x8c
Dec 10 06:07:43 poseidon kernel: [1032171.427272] Code: 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 48 83 ec 10 48 89 5d f0 4c 89 65 f8 66 66 66 66 90 48 89 fb e8 73 f3 ff ff 48 89 df <f0> ff 0f 79 05 e8 16 03 00 00 65 48 8b 04 25 80 cd 00 00 4c 8b 
Dec 10 06:07:43 poseidon kernel: [1032171.427292] RIP  [<ffffffff815e8f10>] mutex_lock+0x20/0x50
Dec 10 06:07:43 poseidon kernel: [1032171.427294]  RSP <ffff8801c3a03b68>
Dec 10 06:07:43 poseidon kernel: [1032171.427295] CR2: 0000000000000040
Dec 10 06:07:43 poseidon kernel: [1032171.427297] ---[ end trace e2b1d6f073ceb684 ]---
Dec 10 06:07:43 poseidon kernel: [1032171.427299] Fixing recursive fault but reboot is needed!
Dec 10 06:08:48 poseidon kernel: [1032236.205150] INFO: rcu_sched_state detected stall on CPU 4 (t=15000 jiffies)
Dec 10 06:11:48 poseidon kernel: [1032416.193266] INFO: rcu_sched_state detected stall on CPU 4 (t=60030 jiffies)
Dec 10 06:14:48 poseidon kernel: [1032596.181430] INFO: rcu_sched_state detected stall on CPU 4 (t=105060 jiffies)
Dec 10 06:17:48 poseidon kernel: [1032776.169640] INFO: rcu_sched_state detected stall on CPU 4 (t=150090 jiffies)
Dec 10 06:19:42 poseidon kernel: [1032889.685652] ------------[ cut here ]------------
Dec 10 06:19:42 poseidon kernel: [1032889.685657] kernel BUG at /build/buildd/linux-3.0.0/fs/dcache.c:736!
Dec 10 06:19:42 poseidon kernel: [1032889.685659] invalid opcode: 0000 [#2] SMP 
Dec 10 06:19:42 poseidon kernel: [1032889.685662] CPU 2 
Dec 10 06:19:42 poseidon kernel: [1032889.685663] Modules linked in: parport_pc ppdev nls_iso8859_1 nls_cp437 btrfs libcrc32c ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs joydev hidp bnep rfcomm pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv vesafb zfs(P) zcommon(P) znvpair(P) zavl(P) zunicode(P) spl zlib_deflate binfmt_misc snd_hda_codec_hdmi btusb bluetooth snd_seq_midi snd_rawmidi snd_seq_midi_event snd_hda_codec_realtek snd_seq snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer arc4 snd_seq_device snd rt61pci crc_itu_t rt2x00pci rt2x00lib mac80211 cfg80211 soundcore snd_page_alloc serio_raw eeprom_93cx6 i7core_edac nvidia(P) edac_core mxm_wmi wmi lp parport usb_storage uas usbhid hid ahci libahci pata_jmicron
Dec 10 06:19:42 poseidon kernel: [1032889.685712] 
Dec 10 06:19:42 poseidon kernel: [1032889.685715] Pid: 49, comm: kswapd0 Tainted: P      D     3.0.0-13-generic #22-Ubuntu Gigabyte Technology Co., Ltd. EX58-UD3R/EX58-UD3R
Dec 10 06:19:42 poseidon kernel: [1032889.685720] RIP: 0010:[<ffffffff8117e7c5>]  [<ffffffff8117e7c5>] __shrink_dcache_sb+0x195/0x1a0
Dec 10 06:19:42 poseidon kernel: [1032889.685728] RSP: 0018:ffff8801c2d31c40  EFLAGS: 00010286
Dec 10 06:19:42 poseidon kernel: [1032889.685730] RAX: 0000000000000000 RBX: ffff8801cf011400 RCX: ffff8801cf0114e0
Dec 10 06:19:42 poseidon kernel: [1032889.685732] RDX: ffff880196b62440 RSI: ffff8801c2d31cdc RDI: ffffffff81a022c0
Dec 10 06:19:42 poseidon kernel: [1032889.685734] RBP: ffff8801c2d31cb0 R08: ffff8801c2d31c68 R09: 0000000000002767
Dec 10 06:19:42 poseidon kernel: [1032889.685737] R10: 0000000000000090 R11: 0000000000000000 R12: ffff880191fc5adc
Dec 10 06:19:42 poseidon kernel: [1032889.685739] R13: ffff8801cf0114e0 R14: 0000000000000008 R15: 000000000000000b
Dec 10 06:19:42 poseidon kernel: [1032889.685741] FS:  000000000Dec 13 23:09:40 poseidon kernel: imklog 5.8.1, log source = /proc/kmsg started.

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


** Tags: bot-comment
-- 
compiz kernel null pointer mutex_lock
https://bugs.launchpad.net/bugs/904086
You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu.