Same problem here. Alas, it was sufficient to prevent vhba.ko kernel module
from loading.
I got a kernel oops as follows:
Apr 29 22:24:09 vera kernel: [ 306.460129] BUG: unable to handle kernel paging
request at 0000000000040004
Apr 29 22:24:09 vera kernel: [ 306.460135] IP: [<ffffffffa00e6bfe>]
vhba_ctl_read+0x1fe/0x2e0 [vhba]
Apr 29 22:24:09 vera kernel: [ 306.460143] PGD 10ec04067 PUD 10ed97067 PMD 0
Apr 29 22:24:09 vera kernel: [ 306.460146] Oops: 0000 [#1] SMP
Apr 29 22:24:09 vera kernel: [ 306.460149] last sysfs file:
/sys/devices/pci0000:00/0000:00:1b.0/sound/card0/uevent
Apr 29 22:24:09 vera kernel: [ 306.460151] CPU 1
Apr 29 22:24:09 vera kernel: [ 306.460152] Modules linked in: vboxnetadp
vboxnetflt vboxdrv snd_hrtimer binfmt_misc kvm_intel kvm parport_pc ppdev lp
parport dm_crypt vesafb usblp snd_hda_codec_hdmi snd_hda_codec_realtek
ir_lirc_codec snd_hda_intel snd_hda_codec ir_sony_decoder ir_jvc_decoder
snd_hwdep rc_rc6_mce ir_rc6_decoder ir_rc5_decoder snd_pcm ir_nec_decoder
mceusb rc_core snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq fglrx(P)
saa7164 dvb_core snd_timer snd_seq_device v4l2_common asus_atk0110 videodev
v4l2_compat_ioctl32 tveeprom snd vhba lirc_dev soundcore snd_page_alloc
radeonfb fb_ddc i2c_algo_bit dm_raid45 xor usbhid usb_storage pata_marvell hid
uas atl1e ahci floppy libahci ramzswap xvmalloc
Apr 29 22:24:09 vera kernel: [ 306.460188]
Apr 29 22:24:09 vera kernel: [ 306.460191] Pid: 2596, comm: cdemud Tainted: P
2.6.38-8-generic #42-Ubuntu System manufacturer P5Q/P5Q
Apr 29 22:24:09 vera kernel: [ 306.460195] RIP: 0010:[<ffffffffa00e6bfe>]
[<ffffffffa00e6bfe>] vhba_ctl_read+0x1fe/0x2e0 [vhba]
Apr 29 22:24:09 vera kernel: [ 306.460199] RSP: 0018:ffff880110a53e38 EFLAGS:
00010202
Apr 29 22:24:09 vera kernel: [ 306.460201] RAX: 0000000000040004 RBX:
ffff8801227f8650 RCX: ffff8801276ddb80
Apr 29 22:24:09 vera kernel: [ 306.460202] RDX: ffff8801203aa408 RSI:
0000000000000286 RDI: 00Apr 29 22:24:09 vera kernel: [ 306.460129] BUG: unable
to handle kernel paging request at 0000000000040004
Apr 29 22:24:09 vera kernel: [ 306.460135] IP: [<ffffffffa00e6bfe>]
vhba_ctl_read+0x1fe/0x2e0 [vhba]
Apr 29 22:24:09 vera kernel: [ 306.460143] PGD 10ec04067 PUD 10ed97067 PMD 0
Apr 29 22:24:09 vera kernel: [ 306.460146] Oops: 0000 [#1] SMP
Apr 29 22:24:09 vera kernel: [ 306.460149] last sysfs file:
/sys/devices/pci0000:00/0000:00:1b.0/sound/card0/uevent
Apr 29 22:24:09 vera kernel: [ 306.460151] CPU 1
Apr 29 22:24:09 vera kernel: [ 306.460152] Modules linked in: vboxnetadp
vboxnetflt vboxdrv snd_hrtimer binfmt_misc kvm_intel kvm parport_pc ppdev lp
parport dm_crypt vesafb usblp snd_hda_codec_hdmi snd_hda_codec_realtek
ir_lirc_codec snd_hda_intel snd_hda_codec ir_sony_decoder ir_jvc_decoder
snd_hwdep rc_rc6_mce ir_rc6_decoder ir_rc5_decoder snd_pcm ir_nec_decoder
mceusb rc_core snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq fglrx(P)
saa7164 dvb_core snd_timer snd_seq_device v4l2_common asus_atk0110 videodev
v4l2_compat_ioctl32 tveeprom snd vhba lirc_dev soundcore snd_page_alloc
radeonfb fb_ddc i2c_algo_bit dm_raid45 xor usbhid usb_storage pata_marvell hid
uas atl1e ahci floppy libahci ramzswap xvmalloc
Apr 29 22:24:09 vera kernel: [ 306.460188]
Apr 29 22:24:09 vera kernel: [ 306.460191] Pid: 2596, comm: cdemud Tainted: P
2.6.38-8-generic #42-Ubuntu System manufacturer P5Q/P5Q
Apr 29 22:24:09 vera kernel: [ 306.460195] RIP: 0010:[<ffffffffa00e6bfe>]
[<ffffffffa00e6bfe>] vhba_ctl_read+0x1fe/0x2e0 [vhba]
Apr 29 22:24:09 vera kernel: [ 306.460199] RSP: 0018:ffff880110a53e38 EFLAGS:
00010202
Apr 29 22:24:09 vera kernel: [ 306.460201] RAX: 0000000000040004 RBX:
ffff8801227f8650 RCX: ffff8801276ddb80
Apr 29 22:24:09 vera kernel: [ 306.460202] RDX: ffff8801203aa408 RSI:
0000000000000286 RDI: 0000000000000286
Apr 29 22:24:09 vera kernel: [ 306.460204] RBP: ffff880110a53ef8 R08:
0000000000000000 R09: 0000000000000000
Apr 29 22:24:09 vera kernel: [ 306.460206] R10: 00007fc667c2c790 R11:
0000000000000293 R12: ffff8801203aa404
Apr 29 22:24:09 vera kernel: [ 306.460208] R13: 0000000000000020 R14:
ffff8801227f8000 R15: ffff8801203aa418
Apr 29 22:24:09 vera kernel: [ 306.460210] FS: 00007fc667c4d700(0000)
GS:ffff8800cfc80000(0000) knlGS:0000000000000000
Apr 29 22:24:09 vera kernel: [ 306.460212] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Apr 29 22:24:09 vera kernel: [ 306.460214] CR2: 0000000000040004 CR3:
000000010cbf4000 CR4: 00000000000006e0
Apr 29 22:24:09 vera kernel: [ 306.460216] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Apr 29 22:24:09 vera kernel: [ 306.460218] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Apr 29 22:24:09 vera kernel: [ 306.460220] Process cdemud (pid: 2596,
threadinfo ffff880110a52000, task ffff8801276ddb80)
Apr 29 22:24:09 vera kernel: [ 306.460221] Stack:
Apr 29 22:24:09 vera kernel: [ 306.460222] ffff8801226f2d70 00020000815c6af8
ffff880110a53f48 00007fc667c2cad0
Apr 29 22:24:09 vera kernel: [ 306.460226] 0000000000020200 0000000000000286
0000000000000000 ffff8801276ddb80
Apr 29 22:24:09 vera kernel: [ 306.460229] ffffffff81087f30 ffff880110a53e80
ffff880110a53e80 0000000000eec870
Apr 29 22:24:09 vera kernel: [ 306.460232] Call Trace:
Apr 29 22:24:09 vera kernel: [ 306.460239] [<ffffffff81087f30>] ?
autoremove_wake_function+0x0/0x40
Apr 29 22:24:09 vera kernel: [ 306.460244] [<ffffffff81279c13>] ?
security_file_permission+0x93/0xb0
Apr 29 22:24:09 vera kernel: [ 306.460248] [<ffffffff81164f73>]
vfs_read+0xc3/0x180
Apr 29 22:24:09 vera kernel: [ 306.460250] [<ffffffff81165081>]
sys_read+0x51/0x90
Apr 29 22:24:09 vera kernel: [ 306.460254] [<ffffffff8100c002>]
system_call_fastpath+0x16/0x1b
Apr 29 22:24:09 vera kernel: [ 306.460255] Code: 00 00 48 81 c4 98 00 00 00 5b
41 5c 41 5d 41 5e 41 5f c9 c3 49 8b 46 30 89 45 a0 49 8b 06 8b 80 84 00 00 00
89 45 a4 49 8b 46 50 <48> 8b 10 48 89 55 a8 48 8b 40 08 48 89 45 b0 41 0f b7 46
4a 88
Apr 29 22:24:09 vera kernel: [ 306.460281] RIP [<ffffffffa00e6bfe>]
vhba_ctl_read+0x1fe/0x2e0 [vhba]
Apr 29 22:24:09 vera kernel: [ 306.460285] RSP <ffff880110a53e38>
Apr 29 22:24:09 vera kernel: [ 306.460286] CR2: 0000000000040004
Apr 29 22:24:09 vera kernel: [ 306.460288] ---[ end trace 9d40a9bbb47d3639 ]---
00000000000286
Apr 29 22:24:09 vera kernel: [ 306.460204] RBP: ffff880110a53ef8 R08:
0000000000000000 R09: 0000000000000000
Apr 29 22:24:09 vera kernel: [ 306.460206] R10: 00007fc667c2c790 R11:
0000000000000293 R12: ffff8801203aa404
Apr 29 22:24:09 vera kernel: [ 306.460208] R13: 0000000000000020 R14:
ffff8801227f8000 R15: ffff8801203aa418
Apr 29 22:24:09 vera kernel: [ 306.460210] FS: 00007fc667c4d700(0000)
GS:ffff8800cfc80000(0000) knlGS:0000000000000000
Apr 29 22:24:09 vera kernel: [ 306.460212] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Apr 29 22:24:09 vera kernel: [ 306.460214] CR2: 0000000000040004 CR3:
000000010cbf4000 CR4: 00000000000006e0
Apr 29 22:24:09 vera kernel: [ 306.460216] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Apr 29 22:24:09 vera kernel: [ 306.460218] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Apr 29 22:24:09 vera kernel: [ 306.460220] Process cdemud (pid: 2596,
threadinfo ffff880110a52000, task ffff8801276ddb80)
Apr 29 22:24:09 vera kernel: [ 306.460221] Stack:
Apr 29 22:24:09 vera kernel: [ 306.460222] ffff8801226f2d70 00020000815c6af8
ffff880110a53f48 00007fc667c2cad0
Apr 29 22:24:09 vera kernel: [ 306.460226] 0000000000020200 0000000000000286
0000000000000000 ffff8801276ddb80
Apr 29 22:24:09 vera kernel: [ 306.460229] ffffffff81087f30 ffff880110a53e80
ffff880110a53e80 0000000000eec870
Apr 29 22:24:09 vera kernel: [ 306.460232] Call Trace:
Apr 29 22:24:09 vera kernel: [ 306.460239] [<ffffffff81087f30>] ?
autoremove_wake_function+0x0/0x40
Apr 29 22:24:09 vera kernel: [ 306.460244] [<ffffffff81279c13>] ?
security_file_permission+0x93/0xb0
Apr 29 22:24:09 vera kernel: [ 306.460248] [<ffffffff81164f73>]
vfs_read+0xc3/0x180
Apr 29 22:24:09 vera kernel: [ 306.460250] [<ffffffff81165081>]
sys_read+0x51/0x90
Apr 29 22:24:09 vera kernel: [ 306.460254] [<ffffffff8100c002>]
system_call_fastpath+0x16/0x1b
Apr 29 22:24:09 vera kernel: [ 306.460255] Code: 00 00 48 81 c4 98 00 00 00 5b
41 5c 41 5d 41 5e 41 5f c9 c3 49 8b 46 30 89 45 a0 49 8b 06 8b 80 84 00 00 00
89 45 a4 49 8b 46 50 <48> 8b 10 48 89 55 a8 48 8b 40 08 48 89 45 b0 41 0f b7 46
4a 88
Apr 29 22:24:09 vera kernel: [ 306.460281] RIP [<ffffffffa00e6bfe>]
vhba_ctl_read+0x1fe/0x2e0 [vhba]
Apr 29 22:24:09 vera kernel: [ 306.460285] RSP <ffff880110a53e38>
Apr 29 22:24:09 vera kernel: [ 306.460286] CR2: 0000000000040004
Apr 29 22:24:09 vera kernel: [ 306.460288] ---[ end trace 9d40a9bbb47d3639 ]---
--
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which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/768893
Title:
System crashes when cdemu is present
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