New: BUG: unable to handle kernel paging request at bffffc20

https://bugzilla.kernel.org/show_bug.cgi?id=40752

Summary: BUG: unable to handle kernel paging request at
bffffc20
Product: Virtualization
Version: unspecified
Kernel Version: 3.0
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: kvm
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No

The system became unresponsive while running a virtual machine. It is running Debian sid/unstable.

The userspace kvm was version qemu-kvm 0.14.1+dfsg-4.

~$ uname -a
Linux gridbug 3.0.0-1-686-pae #1 SMP Sun Jul 24 14:27:32 UTC 2011 i686 GNU/Linux

------------sysklogd output----------------

Aug  9 01:58:35 gridbug kernel: [294131.197652] *pdpt = 000000002a0ce001 *pde =
0000000000000000 
Aug  9 01:58:35 gridbug kernel: [294131.197658] Modules linked in: kvm_intel

kvm btrfs zlib_deflate crc32c libcrc32c ufs qnx4 hfsplus hfs minix ntfs
vfat msdos fat jfs xfs reiserfs ext3 jbd ext2 dm_mod i2c_core acpi_cpufreq
mperf cpufreq_powersave cpufreq_conservative cpufreq_stats cpufreq_users pace ppdev lp bnep rfcomm bluetooth binfmt_misc fuse nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc loop snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_intel snd_hda_codec hp_wmi snd_hwdep evdev rng_core fglrx(P)
sparse_keymap snd_pcm rfkill i82975x_edac edac_core snd_seq snd_timer snd_seq_ device parport_pc processor parport psmouse serio_raw pcspkr snd button thermal_sys wmi soundcore snd_page_alloc ext4 mbcache jbd2 crc16 usbhid hid sg sr_mod cdrom sd_mod crc_t10dif ata_generic ata_piix ahci floppy libahci uhci_hcd libata tg3 libphy ehci_hcd scsi_mod usbcore [last unloaded: scsi _wait_scan]

Aug  9 01:58:35 gridbug kernel: [294131.197712] 
Aug  9 01:58:35 gridbug kernel: [294131.197715] Pid: 24025, comm: kvm Tainted:
P        W  O 3.0.0-1-686-pae #1 Hewlett-Packard HP xw4400 Workstatio
n/0A68h
Aug  9 01:58:35 gridbug kernel: [294131.197719] EIP: 0060:[<f9d82788>] EFLAGS:
00010246 CPU: 1
Aug  9 01:58:35 gridbug kernel: [294131.197727] EIP is at
shadow_walk_okay+0x13/0x4c [kvm]
Aug  9 01:58:35 gridbug kernel: [294131.197729] EAX: f2265de4 EBX: bffffc20
ECX: 00000001 EDX: 00000000
Aug  9 01:58:35 gridbug kernel: [294131.197731] ESI: 00000000 EDI: 00000000
EBP: 00000006 ESP: f2265d10
Aug  9 01:58:35 gridbug kernel: [294131.197733]  DS: 007b ES: 007b FS: 00d8 GS:
00e0 SS: 0068
Aug  9 01:58:35 gridbug kernel: [294131.197738]  0010a867 00000000 f9d894c0
00000006 eadc00a8 ead940e0 02b84798 00000007
Aug  9 01:58:35 gridbug kernel: [294131.197744]  0000000f 00000002 00000000
00000001 ead95601 00000001 00000004 00000000
Aug  9 01:58:35 gridbug kernel: [294131.197749]  00000001 0000bdbe 00000000
0000a1b8 00000000 1aa96867 80000000 0bdbe867
Aug  9 01:58:35 gridbug kernel: [294131.197763]  [<f9d894c0>] ?
paging64_page_fault+0x435/0x68b [kvm]
Aug  9 01:58:35 gridbug kernel: [294131.197768]  [<f9da9303>] ?
vmx_get_rflags+0x20/0x4a [kvm_intel]
Aug  9 01:58:35 gridbug kernel: [294131.197777]  [<f9d84c46>] ?
kvm_mmu_page_fault+0xf/0x5e [kvm]
Aug  9 01:58:35 gridbug kernel: [294131.197781]  [<f9daadfe>] ?
handle_exception+0x146/0x2bb [kvm_intel]
Aug  9 01:58:35 gridbug kernel: [294131.197785]  [<f9dab196>] ?
vmx_handle_exit+0x1cb/0x1eb [kvm_intel]
Aug  9 01:58:35 gridbug kernel: [294131.197793]  [<f9d81e59>] ?
kvm_arch_vcpu_ioctl_run+0x9fe/0xc37 [kvm]
Aug  9 01:58:35 gridbug kernel: [294131.197797]  [<f9da90f7>] ?
vmcs_read64+0x17/0x20 [kvm_intel]
Aug  9 01:58:35 gridbug kernel: [294131.197802]  [<c1029d0c>] ?

should_resched+0x5/0x1f

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https://bugzilla.kernel.org/show_bug.cgi?id=40752

Avi Kivity <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]

--- Comment #1 from Avi Kivity <[email protected]> 2011-08-09 17:11:23 --- Hardware information (/proc/cpuinfo)? Is this reproducible?

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--- Comment #2 from Philippe Gauthier <[email protected]> 2011-08-09 18:16:25 --- This system was reinstalled from Ubuntu running kernel 2.6.38 to Debian running 3.0 just the day before the crash happened. I will keep an eye for more occurrences of the problem.

~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 CPU 6700 @ 2.66GHz
stepping : 6
cpu MHz : 1596.000
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dts tpr_shadow
bogomips : 5333.78
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 CPU 6700 @ 2.66GHz
stepping : 6
cpu MHz : 2667.000
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dts tpr_shadow
bogomips : 5333.51
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

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--- Comment #3 from Avi Kivity <[email protected]> 2011-08-10 13:39:24 ---

Xiao, any idea?

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--- Comment #4 from Anonymous Emailer <[email protected]> 2011-08-15 03:00:06 ---
Reply-To: [email protected]

Sorry, i was on vacation, i'll look at it.

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Hi Philippe,

The log looks little strange, could you test it using upstream code and show us your .config file, the steps to trigger please?

https://bugzilla.kernel.org/show_bug.cgi?id=40752

--- Comment #5 from Anonymous Emailer <[email protected]> 2011-08-15 08:08:52 ---
Reply-To: [email protected]

Hi Philippe,

The log looks little strange, could you test it using upstream code and show us your .config file, the steps to trigger please?

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Alan <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED
                 CC|                            |[email protected]
         Resolution|                            |OBSOLETE

--- Comment #6 from Alan <[email protected]> 2012-05-12 13:55:22 --- No response
Closing as obsolete

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Alan <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED

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