Btrfs: add missing free_extent_buffer

Liu Bo · masoncl · commit 8635eda91ee1 · 2015-06-03T04:03:07.000-07:00
read_tree_block may take a reference on the 'eb', a following
free_extent_buffer is necessary.

Signed-off-by: Liu Bo &lt;bo.li.liu@oracle.com&gt;
Reviewed-by: David Sterba &lt;dsterba@suse.cz&gt;
Signed-off-by: Chris Mason &lt;clm@fb.com&gt;
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
@@ -7981,6 +7981,7 @@ static int account_shared_subtree(struct btrfs_trans_handle *trans,
 			eb = read_tree_block(root, child_bytenr, child_gen);
 			if (!eb || !extent_buffer_uptodate(eb)) {
 				ret = -EIO;
+				free_extent_buffer(eb);
 				goto out;
 			}
 

Original file line number	Diff line number	Diff line change
`@@ -7981,6 +7981,7 @@ static int account_shared_subtree(struct btrfs_trans_handle *trans,`
`7981`	`7981`	`eb = read_tree_block(root, child_bytenr, child_gen);`
`7982`	`7982`	`if (!eb \|\| !extent_buffer_uptodate(eb)) {`
`7983`	`7983`	`ret = -EIO;`
	`7984`	`+ free_extent_buffer(eb);`
`7984`	`7985`	`goto out;`
`7985`	`7986`	`}`
`7986`	`7987`