From 22634bc5620d29765e5199c7b230a372c7ddcda2 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 23 Jun 2021 09:07:45 -0600 Subject: [PATCH] io_uring: add IOPOLL and reserved field checks to IORING_OP_UNLINKAT We can't support IOPOLL with non-pollable request types, and we should check for unused/reserved fields like we do for other request types. Fixes: 14a1143b68ee ("io_uring: add support for IORING_OP_UNLINKAT") Cc: stable@vger.kernel.org Reported-by: Dmitry Kadashev Signed-off-by: Jens Axboe --- fs/io_uring.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/io_uring.c b/fs/io_uring.c index 02eda05..a0bb3cc 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3514,6 +3514,10 @@ static int io_unlinkat_prep(struct io_kiocb *req, struct io_unlink *un = &req->unlink; const char __user *fname; + if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL)) + return -EINVAL; + if (sqe->ioprio || sqe->off || sqe->len || sqe->buf_index) + return -EINVAL; if (unlikely(req->flags & REQ_F_FIXED_FILE)) return -EBADF; -- 2.7.4