From a52d4f657568d6458e873f74a9602e022afe666f Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 28 Sep 2023 09:23:27 -0600 Subject: [PATCH] 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: cf30da90bc3a ("io_uring: add support for IORING_OP_LINKAT") Cc: stable@vger.kernel.org Reported-by: Thomas Leonard Link: https://github.com/axboe/liburing/issues/955 Signed-off-by: Jens Axboe --- io_uring/fs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/io_uring/fs.c b/io_uring/fs.c index f6a69a5..08e3b17 100644 --- 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; -- 2.7.4