[PATCH] ext4: Fix buffer head ref leaks after calls to ext4_get_inode_loc()

[Curt Wohlgemuth <curtw@google.com>]

Fix buffer head reference leaks in ext4_write_inode() and
ext4_xattr_fiemap().

Signed-off-by: Curt Wohlgemuth <curtw@google.com>
---

ext4_get_inode_loc() returns with a reference to the iloc->bh; the two call
sites below do not release this reference.


diff -uprN orig/fs/ext4/extents.c new/fs/ext4/extents.c
--- orig/fs/ext4/extents.c	2010-03-22 08:16:57.000000000 -0700
+++ new/fs/ext4/extents.c	2010-03-22 08:35:40.000000000 -0700
@@ -3879,6 +3879,7 @@ static int ext4_xattr_fiemap(struct inod
 		physical += offset;
 		length = EXT4_SB(inode->i_sb)->s_inode_size - offset;
 		flags |= FIEMAP_EXTENT_DATA_INLINE;
+		brelse(iloc.bh);
 	} else { /* external block */
 		physical = EXT4_I(inode)->i_file_acl << blockbits;
 		length = inode->i_sb->s_blocksize;
diff -uprN orig/fs/ext4/inode.c new/fs/ext4/inode.c
--- orig/fs/ext4/inode.c	2010-03-22 08:16:57.000000000 -0700
+++ new/fs/ext4/inode.c	2010-03-22 08:36:18.000000000 -0700
@@ -5385,6 +5385,7 @@ int ext4_write_inode(struct inode *inode
 				   (unsigned long long)iloc.bh->b_blocknr);
 			err = -EIO;
 		}
+		brelse(iloc.bh);
 	}
 	return err;
 }