FAQ Search Today's Posts Mark Forums Read
» Video Reviews

» Linux Archive

Linux-archive is a website aiming to archive linux email lists and to make them easily accessible for linux users/developers.


» Sponsor

» Partners

» Sponsor

Go Back   Linux Archive > Redhat > Cluster Development

 
 
LinkBack Thread Tools
 
Old 07-18-2012, 03:56 PM
Abhijith Das
 
Default - kernel panic with small gfs2 filesystems - 1 RG

In the unlikely setup where there's only one resource group in the gfs2 filesystem, gfs2_rgrpd_get_next() returns a NULL rgd that is not dealt with properly, causing a kernel NULL ptr dereference. This patch fixes this issue.

This bug was reported in rhel6: https://bugzilla.redhat.com/show_bug.cgi?id=838638

Signed-off-by: Abhi Das <adas@redhat.com>


diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index e53d0a1..fb70792 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1276,6 +1276,7 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested)
/* fall through */
case GLR_TRYFAILED:
rgd = gfs2_rgrpd_get_next(rgd);
+ rgd = rgd ? : begin; /* if NULL, wrap */
if (rgd != begin) /* If we didn't wrap */
break;
 

Thread Tools




All times are GMT. The time now is 04:17 PM.

VBulletin, Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2007, Crawlability, Inc.
Copyright 2007 - 2008, www.linux-archive.org