ext4: unlock xattr_sem properly in ext4_inline_data_truncate()

It takes xattr_sem to check inline data again but without unlock it
in case not have. So unlock it before return.

Fixes: aef1c8513c1f ("ext4: let ext4_truncate handle inline data correctly")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/1604370542-124630-1-git-send-email-joseph.qi@linux.alibaba.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index caa51473207d7e13a586c646faf3006e6d1b7eeb..b41512d1badc368d17f4a105909348d660469b4e 100644 (file)
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1880,6 +1880,7 @@ int ext4_inline_data_truncate(struct inode *inode, int *has_inline)
 
        ext4_write_lock_xattr(inode, &no_expand);
        if (!ext4_has_inline_data(inode)) {
+               ext4_write_unlock_xattr(inode, &no_expand);
                *has_inline = 0;
                ext4_journal_stop(handle);
                return 0;