fs/ntfs3: Add missing direct_IO in ntfs_aops_cmpr

The ntfs3 can use the page cache directly, so its address_space_operations
need direct_IO. Exit ntfs_direct_IO() if it is a compressed file.

Fixes: b432163 ("fs/ntfs3: Update inode->i_mapping->a_ops on compression state")
Reported-by: [email protected]
Closes: https://syzkaller.appspot.com/bug?extid=e36cc3297bd3afd25e19
Signed-off-by: Lizhi Xu <[email protected]>
Signed-off-by: Konstantin Komarov <[email protected]>

Author: Lizhi Xu

fs/ntfs3/inode.c

@@ -805,6 +805,10 @@ static ssize_t ntfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 		ret = 0;
 		goto out;
 	}
+	if (is_compressed(ni)) {
+		ret = 0;
+		goto out;
+	}
 
 	ret = blockdev_direct_IO(iocb, inode, iter,
 				 wr ? ntfs_get_block_direct_IO_W :
@@ -2068,5 +2072,6 @@ const struct address_space_operations ntfs_aops_cmpr = {
 	.read_folio	= ntfs_read_folio,
 	.readahead	= ntfs_readahead,
 	.dirty_folio	= block_dirty_folio,
+	.direct_IO	= ntfs_direct_IO,
 };
 // clang-format on