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b1becbdee7
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Bob Peterson b1becbdee7 GFS2: Fix kernel NULL pointer dereference by dlm_astd 
This patch fixes a problem in an error path when looking
up dinodes.  There are two sister-functions, gfs2_inode_lookup
and gfs2_process_unlinked_inode.  Both functions acquire and
hold the i_iopen glock for the dinode being looked up. The last
thing they try to do is hold the i_gl glock for the dinode.
If that glock fails for some reason, the error path was
incorrectly calling gfs2_glock_put for the i_iopen glock twice.
This resulted in the glock being prematurely freed.  The
"minimum hold time" usually kept the glock in memory, but the
lock interface to dlm (aka lock_dlm) freed its memory for the
glock.  In some circumstances, it would cause dlm's dlm_astd daemon
to try to call the bast function for the freed lock_dlm memory,
which resulted in a NULL pointer dereference.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2010-07-15 09:06:25 +01:00
..
acl.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes 2010-05-25 08:17:51 -07:00
acl.h gfs: constify xattr_handler 2010-05-21 18:31:20 -04:00
aops.c kill spurious reference to vmtruncate 2010-05-27 22:15:42 -04:00
bmap.c GFS2: O_TRUNC not working on stuffed files across cluster 2010-07-15 09:05:17 +01:00
bmap.h GFS2: Streamline alloc calculations for writes 2009-01-05 07:39:17 +00:00
dentry.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dir.c GFS2: glock livelock 2010-04-14 16:48:05 +01:00
dir.h GFS2: Fix bug in gfs2_lock_fs_check_clean() 2009-01-05 07:39:11 +00:00
export.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw 2010-05-21 07:29:15 -07:00
file.c drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
gfs2.h [GFS2] Remove remote lock dropping code 2008-06-27 09:39:44 +01:00
glock.c GFS2: recovery stuck on transaction lock 2010-07-15 09:05:57 +01:00
glock.h GFS2: Metadata address space clean up 2010-03-01 14:07:37 +00:00
glops.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
glops.h GFS2: Add a "demote a glock" interface to sysfs 2009-03-24 11:21:22 +00:00
incore.h GFS2: Add some useful messages 2010-05-06 11:03:29 +01:00
inode.c GFS2: Fix kernel NULL pointer dereference by dlm_astd 2010-07-15 09:06:25 +01:00
inode.h GFS2: Rework reclaiming unlinked dinodes 2010-05-21 16:11:36 +01:00
Kconfig GFS2: do not select QUOTA 2010-03-09 10:08:36 +00:00
lock_dlm.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
log.c GFS2: Rework reclaiming unlinked dinodes 2010-05-21 16:11:36 +01:00
log.h GFS2: Rework reclaiming unlinked dinodes 2010-05-21 16:11:36 +01:00
lops.c GFS2: Various gfs2_logd improvements 2010-05-05 09:39:18 +01:00
lops.h
main.c GFS2: Remove space from slab cache name 2010-03-29 14:26:49 +01:00
Makefile GFS2: Rename eattr.[ch] as xattr.[ch] 2009-08-26 18:51:04 +01:00
meta_io.c GFS2: Eliminate useless err variable 2010-05-12 09:52:50 +01:00
meta_io.h GFS2: Metadata address space clean up 2010-03-01 14:07:37 +00:00
ops_fstype.c GFS2: Various gfs2_logd improvements 2010-05-05 09:39:18 +01:00
ops_inode.c kill spurious reference to vmtruncate 2010-05-27 22:15:42 -04:00
quota.c quota: unify ->set_dqblk 2010-05-21 19:30:44 +02:00
quota.h quota: move code from sync_quota_sb into vfs_quota_sync 2010-03-05 00:20:24 +01:00
recovery.c GFS2: Tag all metadata with jid 2009-12-03 11:58:47 +00:00
recovery.h GFS2: Umount recovery race fix 2009-05-19 10:01:18 +01:00
rgrp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes 2010-05-25 08:17:51 -07:00
rgrp.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
super.c GFS2: Add some useful messages 2010-05-06 11:03:29 +01:00
super.h gfs: constify xattr_handler 2010-05-21 18:31:20 -04:00
sys.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw 2010-05-21 07:29:15 -07:00
sys.h GFS2: Remove ancient, unused code 2009-01-05 07:39:13 +00:00
trace_gfs2.h tracing/events: Move TRACE_SYSTEM outside of include guard 2009-07-13 10:59:55 +02:00
trans.c GFS2: Various gfs2_logd improvements 2010-05-05 09:39:18 +01:00
trans.h
util.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
util.h GFS2: Metadata address space clean up 2010-03-01 14:07:37 +00:00
xattr.c gfs: constify xattr_handler 2010-05-21 18:31:20 -04:00
xattr.h sanitize xattr handler prototypes 2009-12-16 12:16:49 -05:00