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: b432163ebd15 ("fs/ntfs3: Update inode->i_mapping->a_ops on compression state")
Reported-by: syzbot+e36cc3297bd3afd25e19@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=e36cc3297bd3afd25e19
Signed-off-by: Lizhi Xu <lizhi.xu@windriver.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index 3e2957a1e3605c9e66623d3032940b6e24c48687..0f0d27d4644a9b5802abfa122d376d3f01bbb3f2 100644 (file)
--- a/fs/ntfs3/inode.c
+++ b/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