Commit de6ed1b3 authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring/zcrx: check ctrl op payload struct sizes 



Add a build check that ctrl payloads are of the same size and don't grow
struct zcrx_ctrl.

Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/af66caf9776d18e9ff880ab828eb159a6a03caf5.1774261953.git.asml.silence@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 5c727ce0

io_uring/zcrx.c

+2 −0
Original line number Diff line number Diff line
@@ -1253,6 +1253,8 @@ int io_zcrx_ctrl(struct io_ring_ctx *ctx, void __user *arg, unsigned nr_args) 
	struct zcrx_ctrl ctrl;

	struct io_zcrx_ifq *zcrx;



	BUILD_BUG_ON(sizeof(ctrl.zc_export) != sizeof(ctrl.zc_flush));



	if (nr_args)

		return -EINVAL;

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