From: gmail <yngsion@gmail.com>
Date: Fri, 30 Sep 2016 05:33:37 +0000 (-0400)
Subject: ext4: release bh in make_indexed_dir
X-Git-Tag: v3.2.85~92
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=90d3d0dd7cd9826cd5245fe6d611c1ceaab2bc2c

ext4: release bh in make_indexed_dir

commit e81d44778d1d57bbaef9e24c4eac7c8a7a401d40 upstream.

The commit 6050d47adcad: "ext4: bail out from make_indexed_dir() on
first error" could end up leaking bh2 in the error path.

[ Also avoid renaming bh2 to bh, which just confuses things --tytso ]

Signed-off-by: yangsheng <yngsion@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index cd1dd498297e..ede3a33a2f1a 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1413,32 +1413,30 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
 	frame->entries = entries;
 	frame->at = entries;
 	frame->bh = bh;
-	bh = bh2;
 
 	retval = ext4_handle_dirty_metadata(handle, dir, frame->bh);
 	if (retval)
 		goto out_frames;	
-	retval = ext4_handle_dirty_metadata(handle, dir, bh);
+	retval = ext4_handle_dirty_metadata(handle, dir, bh2);
 	if (retval)
 		goto out_frames;	
 
-	de = do_split(handle,dir, &bh, frame, &hinfo, &retval);
+	de = do_split(handle,dir, &bh2, frame, &hinfo, &retval);
 	if (!de) {
 		goto out_frames;
 	}
-	dx_release(frames);
 
-	retval = add_dirent_to_buf(handle, dentry, inode, de, bh);
-	brelse(bh);
-	return retval;
+	retval = add_dirent_to_buf(handle, dentry, inode, de, bh2);
 out_frames:
 	/*
 	 * Even if the block split failed, we have to properly write
 	 * out all the changes we did so far. Otherwise we can end up
 	 * with corrupted filesystem.
 	 */
-	ext4_mark_inode_dirty(handle, dir);
+	if (retval)
+		ext4_mark_inode_dirty(handle, dir);
 	dx_release(frames);
+	brelse(bh2);
 	return retval;
 }