ntfs3: pretend $Extend records as regular files

Since commit af153bb63a33 ("vfs: catch invalid modes in may_open()")
requires any inode be one of S_IFDIR/S_IFLNK/S_IFREG/S_IFCHR/S_IFBLK/
S_IFIFO/S_IFSOCK type, use S_IFREG for $Extend records.

Reported-by: syzbot <syzbot+895c23f6917da440ed0d@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=895c23f6917da440ed0d
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index 37cbbee7fa580df0f979de7762858a9f71d82cda..b08b0091216534d9faa09b92dc770a135fb73ed8 100644 (file)
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -471,6 +471,7 @@ end_enum:
                   fname->home.seq == cpu_to_le16(MFT_REC_EXTEND)) {
                /* Records in $Extend are not a files or general directories. */
                inode->i_op = &ntfs_file_inode_operations;
+               mode = S_IFREG;
        } else {
                err = -EINVAL;
                goto out;