mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-09 02:00:43 -04:00
Code Issues Packages Projects Releases Wiki Activity

ocfs2: fix a deadlock issue in ocfs2_dio_end_io_write()

Browse Source 
The code should call ocfs2_free_alloc_context() to free meta_ac &
data_ac before calling ocfs2_run_deallocs().  Because
ocfs2_run_deallocs() will acquire the system inode's i_mutex hold by
meta_ac.  So try to release the lock before ocfs2_run_deallocs().

Fixes: af1310367f41 ("ocfs2: fix sparse file & data ordering issue in direct io.")
Signed-off-by: Ryan Ding <ryan.ding@oracle.com>
Acked-by: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ryan Ding
2016-03-25 14:21:23 -07:00
committed by Linus Torvalds
parent ce170828e2
commit 28888681b4
1 changed files with 8 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
fs/ocfs2/aops.c
View File

@@ -2341,6 +2341,10 @@ static void ocfs2_dio_end_io_write(struct inode *inode,
ret = ocfs2_lock_allocators(inode, &et, 0, dwc->dw_zero_count*2,
&data_ac, &meta_ac);
if (ret) {
mlog_errno(ret);
goto unlock;
}
credits = ocfs2_calc_extend_credits(inode->i_sb, &di->id2.i_list);
@@ -2380,14 +2384,14 @@ static void ocfs2_dio_end_io_write(struct inode *inode,
ocfs2_inode_unlock(inode, 1);
brelse(di_bh);
out:
ocfs2_run_deallocs(osb, &dealloc);
if (locked)
mutex_unlock(&inode->i_mutex);
ocfs2_dio_free_write_ctx(inode, dwc);
if (data_ac)
ocfs2_free_alloc_context(data_ac);
if (meta_ac)
ocfs2_free_alloc_context(meta_ac);
ocfs2_run_deallocs(osb, &dealloc);
if (locked)
mutex_unlock(&inode->i_mutex);
ocfs2_dio_free_write_ctx(inode, dwc);
}
/*