Bug 12503

Summary: [slab corruption] BUG key_jar: Poison overwritten
Product: Memory Management Reporter: Rafael J. Wysocki (rjw)
Component: Slab AllocatorAssignee: Andrew Morton (akpm)
Status: CLOSED UNREPRODUCIBLE    
Severity: normal CC: mingo
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.29-rc Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 12398    

Description Rafael J. Wysocki 2009-01-19 14:45:33 UTC 
Subject    : [slab corruption] BUG key_jar: Poison overwritten
Submitter  : Ingo Molnar <mingo@elte.hu>
Date       : 2009-01-15 18:16
References : http://marc.info/?l=linux-kernel&m=123204353425825&w=4
Handled-By : David Howells <dhowells@redhat.com>
Notify-Also : "Vegard Nossum" <vegard.nossum@gmail.com>

This entry is being used for tracking a regression from 2.6.28.  Please don't
close it until the problem is fixed in the mainline.
Comment 1 Rafael J. Wysocki 2009-02-08 16:36:19 UTC 
On Sunday 08 February 2009, Ingo Molnar wrote:
> 
> * Rafael J. Wysocki <rjw@sisk.pl> wrote:
> 
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> > 
> > The following bug entry is on the current list of known regressions
> > from 2.6.28.  Please verify if it still should be listed and let me know
> > (either way).
> > 
> > 
> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=12503
> > Subject             : [slab corruption] BUG key_jar: Poison overwritten
> > Submitter   : Ingo Molnar <mingo@elte.hu>
> > Date                : 2009-01-15 18:16 (25 days old)
> > References  : http://marc.info/?l=linux-kernel&m=123204353425825&w=4
> > Handled-By  : David Howells <dhowells@redhat.com>
> 
> This slab corruption has not triggered again. It's either a very rare thing
> (in 
> which case there's no realistic way to debug it via this angle), or it got
> fixed 
> meanwhile.
> 
> Please close it. Thanks,
Comment 2 Rafael J. Wysocki 2009-02-13 15:13:19 UTC 
Patch : http://marc.info/?l=linux-kernel&m=123453394630727&w=4
Comment 3 Ingo Molnar 2009-02-14 02:14:02 UTC 
> Patch : http://marc.info/?l=linux-kernel&m=123453394630727&w=4

Upstream fix:

  fb5ae64: User namespaces: Only put the userns when we unhash the uid

also in -rc5.

	Ingo