Commit 3730aebb authored Nov 15, 2024 by Pavel Begunkov Committed by Jens Axboe Nov 15, 2024

io_uring: disable ENTER_EXT_ARG_REG for IOPOLL

IOPOLL doesn't use the extended arguments, no need for it to support
IORING_ENTER_EXT_ARG_REG. Let's disable it for IOPOLL, if anything it
leaves more space for future extensions.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/a35ecd919dbdc17bd5b7932273e317832c531b45.1731689588.git.asml.silence@gmail.com

Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 68685fa2

io_uring/io_uring.c

+2 −6

Original line number	Diff line number	Diff line
		@@ -3214,12 +3214,8 @@ static int io_validate_ext_arg(struct io_ring_ctx *ctx, unsigned flags,

		if (!(flags & IORING_ENTER_EXT_ARG))
		return 0;

		if (flags & IORING_ENTER_EXT_ARG_REG) {
		if (argsz != sizeof(struct io_uring_reg_wait))
		if (flags & IORING_ENTER_EXT_ARG_REG)
		return -EINVAL;
		return PTR_ERR(io_get_ext_arg_reg(ctx, argp));
		}
		if (argsz != sizeof(arg))
		return -EINVAL;
		if (copy_from_user(&arg, argp, sizeof(arg)))