Commit bd44d7e9 authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring: don't allow netpolling with SETUP_IOPOLL 



IORING_SETUP_IOPOLL rings don't have any netpoll handling, let's fail
attempts to register netpolling in this case, there might be people who
will mix up IOPOLL and netpoll.

Cc: stable@vger.kernel.org
Fixes: ef1186c1 ("io_uring: add register/unregister napi function")
Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/1e7553aee0a8ae4edec6742cd6dd0c1e6914fba8.1721819383.git.asml.silence@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent f8b632e8

io_uring/napi.c

+2 −0
Original line number Diff line number Diff line
@@ -222,6 +222,8 @@ int io_register_napi(struct io_ring_ctx *ctx, void __user *arg) 
	};

	struct io_uring_napi napi;



	if (ctx->flags & IORING_SETUP_IOPOLL)

		return -EINVAL;

	if (copy_from_user(&napi, arg, sizeof(napi)))

		return -EFAULT;

	if (napi.pad[0] || napi.pad[1] || napi.pad[2] || napi.resv)