[PATCH 4.9 44/78] ext4: unlock xattr_sem properly in ext4_inline_data_truncate()

[Greg Kroah-Hartman]

From: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>

commit 7067b2619017d51e71686ca9756b454de0e5826a upstream.

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@xxxxxxxxxx>
Cc: Tao Ma <boyu.mt@xxxxxxxxxx>
Signed-off-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Reviewed-by: Andreas Dilger <adilger@xxxxxxxxx>
Link: https://lore.kernel.org/r/1604370542-124630-1-git-send-email-joseph.qi@xxxxxxxxxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Cc: stable@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/ext4/inline.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1890,6 +1890,7 @@ void ext4_inline_data_truncate(struct in
 
 	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;