Bug 27332 - Disabling lock debugging due to kernel taint - with no tained modules loaded
Summary: Disabling lock debugging due to kernel taint - with no tained modules loaded
Status: CLOSED INVALID
Alias: None
Product: Other
Classification: Unclassified
Component: Other (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: other_other
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-01-22 13:24 UTC by david b
Modified: 2012-05-12 15:33 UTC (History)
2 users (show)

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Regression: No
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Description david b 2011-01-22 13:24:33 UTC 
So the following appeared in dmesg on my box:

Jan 22 22:57:32 X kernel: [720299.816058] [Hardware Error]: MC4_STATUS: Corrected error, other errors lost: no, CPU context corrupt: no, CECC Error
Jan 22 22:57:32 X kernel: [720299.816075] [Hardware Error]: Northbridge Error, node 0: , core: 0L3 ECC data cache error.
Jan 22 22:57:32 X kernel: [720299.816087] [Hardware Error]: Transaction: RD, Type: GEN, Cache Level: L3/GEN
Jan 22 22:57:32 X kernel: [720299.816093] Disabling lock debugging due to kernel taint
Jan 22 22:57:32 X kernel: [720299.816099] [Hardware Error]: Machine check events logged
                                                                                 

However I cannot find any message in /var/log/kern.log or dmesg to indicate which module (if any) taints my kernel.
Is this message just an output mistake? 

The box is running a 2.6.37 amd64 kernel.
Comment 1 Paweł Drewniak 2011-05-19 19:28:44 UTC 
I think this must be related to the Machine Check Exception - I have a similar thing in my log (no tainted modules loaded). Note this relates to cache as well.

dmesg:
Disabling lock debugging due to kernel taint
Machine check events logged

mcelog:
May 17 03:11:42 zillinger HARDWARE ERROR. This is *NOT* a software problem!
May 17 03:11:42 zillinger Please contact your hardware vendor
May 17 03:11:42 zillinger MCE 0
May 17 03:11:42 zillinger CPU 0 BANK 0 
May 17 03:11:42 zillinger MISC 140002b0002a0 ADDR 75345f00 
May 17 03:11:42 zillinger TIME 1305594702 Tue May 17 03:11:42 2011
May 17 03:11:42 zillinger MCG status:
May 17 03:11:42 zillinger MCi status:
May 17 03:11:42 zillinger Error overflow
May 17 03:11:42 zillinger MCi_MISC register valid
May 17 03:11:42 zillinger MCi_ADDR register valid
May 17 03:11:42 zillinger MCA: Generic CACHE Level-1 Snoop Error
May 17 03:11:42 zillinger STATUS cc00000120040189 MCGSTATUS 0
May 17 03:11:42 zillinger MCGCAP 180204 APICID 0 SOCKETID 0 
May 17 03:11:42 zillinger CPUID Vendor Intel Family 15 Model 4
May 17 03:11:42 zillinger HARDWARE ERROR. This is *NOT* a software problem!
May 17 03:11:42 zillinger Please contact your hardware vendor
May 17 03:11:42 zillinger MCE 1
May 17 03:11:42 zillinger CPU 0 BANK 1 
May 17 03:11:42 zillinger TIME 1305594702 Tue May 17 03:11:42 2011
May 17 03:11:42 zillinger MCG status:
May 17 03:11:42 zillinger MCi status:
May 17 03:11:42 zillinger MCA: Data CACHE Level-1 Data-Read Error
May 17 03:11:42 zillinger STATUS 800202a800000135 MCGSTATUS 0
May 17 03:11:42 zillinger MCGCAP 180204 APICID 0 SOCKETID 0 
May 17 03:11:42 zillinger CPUID Vendor Intel Family 15 Model 4



kernel:
Linux zillinger 2.6.34-hardened-r6-woody #3 SMP Tue Dec 14 14:03:23 CET 2010 x86_64 Intel(R) Pentium(R) 4 CPU 3.00GHz GenuineIntel GNU/Linux

Shouldn't the version reported in the bug be 2.6 instead of 2.5?
Comment 2 Alan 2012-05-12 15:33:35 UTC 
The taint is the hardware error
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