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alistair23-linux/fs/ocfs2
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Xue jiufei 4a184b4ff4 ocfs2: fix NULL pointer dereference when traversing o2hb_all_regions 
There may exist NULL pointer dereference in config_item_name() when one
volume (say Volume A) unmounts while another (say Volume B) mounting.

     Volume A                          Volume B

  already Mounted.
  Unmounting, call
  o2hb_heartbeat_group_drop_item()
    -> config_item_put(item)
    set reg(A)->item.ci_name to NULL
    in function config_item_cleanup().

                                    begin mounting, call
                                    o2hb_region_pin() and tranverse all
                                    regions. When reading
                                    reg(A)->item.ci_name, it causes
                                    NULL pointer dereference.

  call o2hb_region_release() and
  del reg(A) from list.

So we should skip accessing regions that is going to release when
tranverse o2hb_all_regions.

Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com>
Signed-off-by: joyce <xuejiufei@huawei.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Sunil Mushran <sunil.mushran@gmail.com>
Cc: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2013-07-03 16:07:25 -07:00
..
cluster ocfs2: fix NULL pointer dereference when traversing o2hb_all_regions 2013-07-03 16:07:25 -07:00
dlm ocfs2: dlmlock_master() should return DLM_NORMAL after adding lock to blocked list 2013-07-03 16:07:24 -07:00
dlmfs fs: Limit sys_mount to only request filesystem modules. 2013-03-03 19:36:31 -08:00
Kconfig ocfs2: Make OCFS2_FS depend on CONFIGFS_FS 2011-01-16 21:22:40 +00:00
Makefile Ocfs2/move_extents: Add basic framework and source files for extent moving. 2011-05-25 15:17:08 +08:00
acl.c ocfs2: Handle kuids and kgids in acl/xattr conversions. 2013-02-13 06:00:56 -08:00
acl.h fs: take the ACL checks to common code 2011-07-25 14:30:23 -04:00
alloc.c ocfs2: fix mutex_unlock and possible memory leak in ocfs2_remove_btree_range 2013-07-03 16:07:23 -07:00
alloc.h ocfs2: Add ocfs2_trim_fs for SSD trim support. 2011-05-23 23:37:18 -07:00
aops.c ocfs2: use ->invalidatepage() length argument 2013-05-21 23:58:46 -04:00
aops.h aio: don't include aio.h in sched.h 2013-05-07 20:16:25 -07:00
blockcheck.c ocfs2: kill endianness abuses in blockcheck.c 2012-05-29 23:28:35 -04:00
blockcheck.h
…
buffer_head_io.c ocfs2: Remove masklog ML_UPTODATE. 2011-02-24 16:22:20 +08:00
buffer_head_io.h
…
dcache.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
dcache.h Track negative entries v3 2010-09-10 09:18:15 -07:00
dir.c [readdir] convert ocfs2 2013-06-29 12:57:02 +04:00
dir.h [readdir] convert ocfs2 2013-06-29 12:57:02 +04:00
dlmglue.c aio: remove retry-based AIO 2013-05-07 18:38:27 -07:00
dlmglue.h ocfs2: Fix lockdep warning in reflink. 2010-09-10 09:19:06 -07:00
export.c fs: encode_fh: return FILEID_INVALID if invalid fid_type 2013-02-26 02:46:10 -05:00
export.h
…
extent_map.c ocfs2: goto out_unlock if ocfs2_get_clusters_nocache() failed in ocfs2_fiemap() 2013-05-24 16:22:52 -07:00
extent_map.h ocfs2: Implement llseek() 2011-07-25 14:58:15 -07:00
file.c vfs: export lseek_execute() to modules 2013-07-03 16:23:27 +04:00
file.h ->permission() sanitizing: don't pass flags to ->permission() 2011-07-20 01:43:24 -04:00
heartbeat.c ocfs2: Remove mlog(0) from fs/ocfs2/heartbeat.c 2011-02-23 21:17:39 +08:00
heartbeat.h
…
inode.c ocfs2: Convert uid and gids between in core and on disk inodes 2013-02-13 06:00:58 -08:00
inode.h aio: don't include aio.h in sched.h 2013-05-07 20:16:25 -07:00
ioctl.c ocfs2: fix error return code in ocfs2_info_handle_freefrag() 2013-04-29 15:54:27 -07:00
ioctl.h Ocfs2: Move ocfs2 ioctl definitions from ocfs2_fs.h to newly added ocfs2_ioctl.h 2010-03-02 14:10:20 -08:00
journal.c [readdir] convert ocfs2 2013-06-29 12:57:02 +04:00
journal.h fs/ocfs2/journal.h: add bits_wanted while calculating credits in ocfs2_calc_extend_credits 2013-07-03 16:07:23 -07:00
localalloc.c ocfs2: remove kfree() redundant null checks 2013-02-21 17:22:19 -08:00
localalloc.h ocfs2: increase the default size of local alloc windows 2010-05-05 18:18:07 -07:00
locks.c ocfs2: remove INODE from unused files. 2011-02-21 11:18:23 +08:00
locks.h
…
mmap.c kill f_vfsmnt 2013-02-26 02:46:10 -05:00
mmap.h
…
move_extents.c ocfs2: fix NULL dereference for moving extents 2013-04-29 15:54:27 -07:00
move_extents.h Ocfs2/move_extents: move/defrag extents within a certain range. 2011-05-25 15:17:12 +08:00
namei.c ocfs2: fix readonly issue in ocfs2_unlink() 2013-07-03 16:07:24 -07:00
namei.h
…
ocfs1_fs_compat.h
…
ocfs2.h ocfs2: remove unecessary variable needs_checkpoint 2013-07-03 16:07:23 -07:00
ocfs2_fs.h Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
ocfs2_ioctl.h Ocfs2/move_extents: Adding new ioctl code 'OCFS2_IOC_MOVE_EXT' to ocfs2. 2011-05-25 15:17:08 +08:00
ocfs2_lockid.h
…
ocfs2_lockingver.h ocfs2_dlmfs: Enable the use of user cluster stacks. 2010-02-26 15:41:18 -08:00
ocfs2_trace.h ocfs2: Add trace event for trim. 2011-05-23 23:37:20 -07:00
quota.h ocfs2: use system_wq instead of ocfs2_quota_wq 2011-02-01 11:42:42 +01:00
quota_global.c userns: Convert struct dquot dq_id to be a struct kqid 2012-09-18 01:01:41 -07:00
quota_local.c userns: Convert struct dquot dq_id to be a struct kqid 2012-09-18 01:01:41 -07:00
refcounttree.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-02-26 20:16:07 -08:00
refcounttree.h Ocfs2/refcounttree: Publicize couple of funcs from refcounttree.c 2011-05-25 15:17:08 +08:00
reservations.c ocfs2: Remove masklog ML_RESERVATIONS. 2011-02-23 22:10:56 +08:00
reservations.h Fix common misspellings 2011-03-31 11:26:23 -03:00
resize.c ocfs2: Remove mlog(0) from fs/ocfs2/suballoc.c 2011-02-22 08:24:01 +08:00
resize.h
…
slot_map.c ocfs2: Clean up messages in the fs 2011-07-24 10:34:54 -07:00
slot_map.h
…
stack_o2cb.c ocfs2: remove kfree() redundant null checks 2013-02-21 17:22:19 -08:00
stack_user.c dlm: add recovery callbacks 2012-01-04 08:56:31 -06:00
stackglue.c ocfs2_dlmfs: Enable the use of user cluster stacks. 2010-02-26 15:41:18 -08:00
stackglue.h Fix common misspellings 2011-03-31 11:26:23 -03:00
suballoc.c ocfs2: remove duplicated mlog_errno() in ocfs2_relink_block_group 2013-07-03 16:07:24 -07:00
suballoc.h ocfs2: ac->ac_allow_chain_relink=0 won't disable group relink 2013-02-27 19:10:09 -08:00
super.c ocfs2: remove unecessary variable needs_checkpoint 2013-07-03 16:07:23 -07:00
super.h treewide: use __printf not __attribute__((format(printf,...))) 2011-10-31 17:30:54 -07:00
symlink.c ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path 2013-02-26 02:46:12 -05:00
symlink.h ocfs: simplify symlink handling 2012-05-29 23:28:40 -04:00
sysfile.c ocfs2: remove kfree() redundant null checks 2013-02-21 17:22:19 -08:00
sysfile.h
…
uptodate.c ocfs2: Remove masklog ML_UPTODATE. 2011-02-24 16:22:20 +08:00
uptodate.h
…
ver.c
…
ver.h
…
xattr.c ocfs2: xattr: fix inlined xattr reflink 2013-07-03 16:07:24 -07:00
xattr.h ocfs2: propagate umode_t 2012-01-03 22:55:02 -05:00