Jan Kara 7f5aa21508 jbd2: Avoid possible NULL dereference in jbd2_journal_begin_ordered_truncate() ... If we race with commit code setting i_transaction to NULL, we could possibly dereference it. Proper locking requires the journal pointer (to access journal->j_list_lock), which we don't have. So we have to change the prototype of the function so that filesystem passes us the journal pointer. Also add a more detailed comment about why the function jbd2_journal_begin_ordered_truncate() does what it does and how it should be used. Thanks to Dan Carpenter <error27@gmail.com> for pointing to the suspitious code. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Joel Becker <joel.becker@oracle.com> CC: linux-ext4@vger.kernel.org CC: ocfs2-devel@oss.oracle.com CC: mfasheh@suse.de CC: Dan Carpenter <error27@gmail.com>		2009-02-10 11:15:34 -05:00
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cluster
dlm
acl.c
acl.h
alloc.c
alloc.h
aops.c
aops.h
blockcheck.c
blockcheck.h
buffer_head_io.c
buffer_head_io.h
dcache.c
dcache.h
dir.c
dir.h
dlmglue.c
dlmglue.h
export.c
export.h
extent_map.c
extent_map.h
file.c
file.h
heartbeat.c
heartbeat.h
inode.c
inode.h
ioctl.c
ioctl.h
journal.c
journal.h
Kconfig
localalloc.c
localalloc.h
locks.c
locks.h
Makefile
mmap.c
mmap.h
namei.c
namei.h
ocfs1_fs_compat.h
ocfs2_fs.h
ocfs2_lockid.h
ocfs2_lockingver.h
ocfs2.h
quota_global.c
quota_local.c
quota.h
resize.c
resize.h
slot_map.c
slot_map.h
stack_o2cb.c
stack_user.c
stackglue.c
stackglue.h
suballoc.c
suballoc.h
super.c
super.h
symlink.c
symlink.h
sysfile.c
sysfile.h
uptodate.c
uptodate.h
ver.c
ver.h
xattr.c
xattr.h