io_uring/fs: remove sqe->rw_flags checking from LINKAT

This is unionized with the actual link flags, so they can of course be set and they will be evaluated further down. If not we fail any LINKAT that has to set option flags. Fixes: cf30da9 ("io_uring: add support for IORING_OP_LINKAT") Cc: [email protected] Reported-by: Thomas Leonard <[email protected]> Link: axboe/liburing#955 Signed-off-by: Jens Axboe <[email protected]>
sedwards · Sep 29, 2023 · a52d4f6 · a52d4f6
1 parent c21a802
commit a52d4f6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/io_uring/fs.c b/io_uring/fs.c
@@ -243,7 +243,7 @@ int io_linkat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 	struct io_link *lnk = io_kiocb_to_cmd(req, struct io_link);
 	const char __user *oldf, *newf;
 
-	if (sqe->rw_flags || sqe->buf_index || sqe->splice_fd_in)
+	if (sqe->buf_index || sqe->splice_fd_in)
 		return -EINVAL;
 	if (unlikely(req->flags & REQ_F_FIXED_FILE))
 		return -EBADF;