Commit d2347b96 authored by Dylan Yudaken's avatar Dylan Yudaken Committed by Jens Axboe
Browse files

io_uring: verify pad field is 0 in io_get_ext_arg 



Ensure that only 0 is passed for pad here.

Fixes: c73ebb68 ("io_uring: add timeout support for io_uring_enter()")
Signed-off-by: default avatarDylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220412163042.2788062-5-dylany@fb.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 6fb53cf8

fs/io_uring.c

+2 −0
Original line number Diff line number Diff line
@@ -10711,6 +10711,8 @@ static int io_get_ext_arg(unsigned flags, const void __user *argp, size_t *argsz 
		return -EINVAL;

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

		return -EFAULT;

	if (arg.pad)

		return -EINVAL;

	*sig = u64_to_user_ptr(arg.sigmask);

	*argsz = arg.sigmask_sz;

	*ts = u64_to_user_ptr(arg.ts);