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Bug 104958

Summary:	NULL pointer dereference in Severn
Product:	[Retired] Red Hat Linux Beta	Reporter:	Mike McLean <mikem>
Component:	kernel	Assignee:	Arjan van de Ven <arjanv>
Status:	CLOSED DUPLICATE	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	beta2	CC:	davej, dwmw2, riel
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-02-21 18:58:42 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	100643

Description Mike McLean 2003-09-23 21:30:57 UTC

* Severn-0.93.2
* seems to be only smp machines
* kernel-smp-2.4.22-1.2061.nptl

I'm seeing several smp machines die at various places with only the message
"Unable to handle kernel NULL pointer dereference"

Comment 1 Mike McLean 2003-09-23 21:44:34 UTC

I got the following peculiar serial log from one machine as it died.  It appears
to contain several overlapping kernel error messages including a NULL
dereference and a kernel BUG.

Unngab rlee qutoes hta--nd--<1->--ke--ab--l-e [ tocu tha hg erneeq ]e
--ue-r--na--gi---<-4->
 at kverinretula lB UGa dadtr escso mm0i0ta7.dce:f7462
!
 pUrinnatbileng  teo ihpa:
ndle00 ak7erdneef6l
 NU*LpLd peo i=n 1t3e0r bd9e06r7e
fere*pntcee =< 4>0 0a0t00 0v0ir0t
ual address 00000282
 printing eip:
c029223c
*pde = 00000000

Comment 2 Mike McLean 2003-09-24 03:59:14 UTC

whee, it's like a word find.

I've managed to disentangle the following strings from the mess above.

----------[ cut here ]------------
kernel BUG at commit.c:742!      

Unable to handle kernel NULL pointer dereference at virtual address 00000282
 printing eip:
c029223c
*pde = 00000000



Some of it appears to be corrupted.  Looks like there might have been a page
fault too.

Unable to handle (garbage)
 printing eip:
00a7def6
*pde = 130b9067
*pte = 00000000

Comment 3 Dave Jones 2003-09-29 01:06:20 UTC


*** This bug has been marked as a duplicate of 104922 ***

Comment 4 Red Hat Bugzilla 2006-02-21 18:58:42 UTC

Changed to 'CLOSED' state since 'RESOLVED' has been deprecated.