linux_dsm_epyc7002/fs/ocfs2
Yiwen Jiang 75f82eaa50 ocfs2: fix NULL pointer dereference when dismount and ocfs2rec simultaneously
2 nodes cluster, say Node A and Node B, mount the same ocfs2 volume, and
create a file 1.

Node A			Node B
open 1, get open lock
                        rm 1, and then add 1 to orphan_dir
storage link down,
o2hb_write_timeout
->o2quo_disk_timeout
->emergency_restart
                        at the moment, Node B dismount and do
			ocfs2rec simultaneously
                        1) ocfs2_dismount_volume
			->ocfs2_recovery_exit
			->wait_event(osb->recovery_event)
			->flush_workqueue(ocfs2_wq)
			2) ocfs2rec
			->queue_work(&journal->j_recovery_work)
                        ->ocfs2_recover_orphans
			->ocfs2_commit_truncate
                        ->queue_delayed_work(&osb->osb_truncate_log_wq)

In ocfs2_recovery_exit, it flushes workqueue and then releases system
inodes.  When doing ocfs2rec, it will call ocfs2_flush_truncate_log
which will try to get sys_root_inode, and NULL pointer dereference
occurs.

Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com>
Signed-off-by: joyce <xuejiufei@huawei.com>
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21 16:19:42 -08:00
..
cluster ocfs2: remove versioning information 2014-01-21 16:19:41 -08:00
dlm ocfs2: remove versioning information 2014-01-21 16:19:41 -08:00
dlmfs ocfs2: remove versioning information 2014-01-21 16:19:41 -08:00
acl.c ocfs2: clean up dead code in ocfs2_acl_from_xattr() 2013-09-11 15:56:39 -07:00
acl.h fs: take the ACL checks to common code 2011-07-25 14:30:23 -04:00
alloc.c ocfs2: return EINVAL if the given range to discard is less than block size 2014-01-21 16:19:42 -08:00
alloc.h ocfs2: Add ocfs2_trim_fs for SSD trim support. 2011-05-23 23:37:18 -07:00
aops.c ocfs2: simplify ocfs2_invalidatepage() and ocfs2_releasepage() 2013-11-13 12:09:02 +09:00
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: return ENOMEM when sb_getblk() fails 2013-11-13 12:09:00 +09:00
buffer_head_io.h
dcache.c ocfs2: needs ->d_lock to poke in ->d_parent->d_inode from ->d_revalidate() 2013-09-29 22:02:20 -04:00
dcache.h Track negative entries v3 2010-09-10 09:18:15 -07:00
dir.c ocfs2: return ENOMEM when sb_getblk() fails 2013-11-13 12:09:00 +09:00
dir.h [readdir] convert ocfs2 2013-06-29 12:57:02 +04:00
dlmglue.c ocfs2: pass ocfs2_cluster_connection to ocfs2_this_node 2014-01-21 16:19:41 -08:00
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: fix the end cluster offset of FIEMAP 2013-09-11 15:56:53 -07:00
extent_map.h ocfs2: Implement llseek() 2011-07-25 14:58:15 -07:00
file.c ocfs2: punch hole should return EINVAL if the length argument in ioctl is negative 2014-01-21 16:19:42 -08:00
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: get rid of impossible checks 2013-11-09 00:16:32 -05:00
inode.h aio: don't include aio.h in sched.h 2013-05-07 20:16:25 -07:00
ioctl.c ocfs2: adjust minlen with discard_granularity in the FITRIM ioctl 2014-01-21 16:19:42 -08:00
ioctl.h
journal.c ocfs2: use i_size_read() to access i_size 2013-09-11 15:56:30 -07:00
journal.h fs/ocfs2: remove unnecessary variable bits_wanted from ocfs2_calc_extend_credits 2013-11-13 12:09:00 +09:00
Kconfig ocfs2: Make OCFS2_FS depend on CONFIGFS_FS 2011-01-16 21:22:40 +00:00
localalloc.c ocfs2: ac_bits_wanted should be local_alloc_bits when returns -ENOSPC 2013-09-11 15:56:31 -07:00
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
Makefile ocfs2: remove versioning information 2014-01-21 16:19:41 -08:00
mmap.c kill f_vfsmnt 2013-02-26 02:46:10 -05:00
mmap.h
move_extents.c ocfs2: remove redundant ocfs2_alloc_dinode_update_counts() and ocfs2_block_group_set_bits() 2014-01-21 16:19:42 -08:00
move_extents.h Ocfs2/move_extents: move/defrag extents within a certain range. 2011-05-25 15:17:12 +08:00
namei.c ocfs2: return ENOMEM when sb_getblk() fails 2013-11-13 12:09:00 +09:00
namei.h
ocfs1_fs_compat.h
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_trace.h ocfs2: lighten up allocate transaction 2013-09-11 15:56:28 -07:00
ocfs2.h ocfs2: add clustername to cluster connection 2014-01-21 16:19:41 -08:00
quota_global.c ocfs2: use i_size_read() to access i_size 2013-09-11 15:56:30 -07:00
quota_local.c ocfs2: use i_size_read() to access i_size 2013-09-11 15:56:30 -07:00
quota.h ocfs2: use system_wq instead of ocfs2_quota_wq 2011-02-01 11:42:42 +01:00
refcounttree.c ocfs2: add necessary check in case sb_getblk() fails 2013-11-13 12:09:00 +09:00
refcounttree.h ocfs2: fix NULL pointer dereference in ocfs2_duplicate_clusters_by_page 2013-08-13 17:57:49 -07:00
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: do not call brelse() if group_bh is not initialized in ocfs2_group_add() 2013-11-13 12:09:01 +09:00
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: pass ocfs2_cluster_connection to ocfs2_this_node 2014-01-21 16:19:41 -08:00
stack_user.c ocfs2: fix sparse non static symbol warning 2014-01-21 16:19:42 -08:00
stackglue.c ocfs2: pass ocfs2_cluster_connection to ocfs2_this_node 2014-01-21 16:19:41 -08:00
stackglue.h ocfs2: pass ocfs2_cluster_connection to ocfs2_this_node 2014-01-21 16:19:41 -08:00
suballoc.c ocfs2: remove redundant ocfs2_alloc_dinode_update_counts() and ocfs2_block_group_set_bits() 2014-01-21 16:19:42 -08:00
suballoc.h ocfs2: remove redundant ocfs2_alloc_dinode_update_counts() and ocfs2_block_group_set_bits() 2014-01-21 16:19:42 -08:00
super.c ocfs2: fix NULL pointer dereference when dismount and ocfs2rec simultaneously 2014-01-21 16:19:42 -08:00
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
xattr.c ocfs2: add necessary check in case sb_getblk() fails 2013-11-13 12:09:00 +09:00
xattr.h xattr: Constify ->name member of "struct xattr". 2013-07-25 19:30:03 +10:00