Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.12 696/700] io_uring: add IOPOLL and reserved field checks to IORING_OP_UNLINKAT | Date | Mon, 12 Jul 2021 08:12:59 +0200 |
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From: Jens Axboe <axboe@kernel.dk>
commit 22634bc5620d29765e5199c7b230a372c7ddcda2 upstream.
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 <dkadashev@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/io_uring.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3548,6 +3548,10 @@ static int io_unlinkat_prep(struct io_ki 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;
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