ext4: check ext4_journal_get_write_access() errors

Check ext4_journal_get_write_access() errors.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: adilger@clusterfs.com
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mingming Cao <cmm@us.ibm.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 68611945687d..63c33e053478 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -57,10 +57,15 @@ static struct buffer_head *ext4_append(handle_t *handle,
 
         *block = inode->i_size >> inode->i_sb->s_blocksize_bits;
 
-        if ((bh = ext4_bread(handle, inode, *block, 1, err))) {
+        bh = ext4_bread(handle, inode, *block, 1, err);
+        if (bh) {
                 inode->i_size += inode->i_sb->s_blocksize;
                 EXT4_I(inode)->i_disksize = inode->i_size;
-                ext4_journal_get_write_access(handle,bh);
+                *err = ext4_journal_get_write_access(handle, bh);
+                if (*err) {
+                        brelse(bh);
+                        bh = NULL;
+                }
         }
         return bh;
 }