Commit 0f5e4b83 authored by Eugene Syromiatnikov's avatar Eugene Syromiatnikov Committed by Jens Axboe
Browse files

io_uring: implement compat handling for IORING_REGISTER_IOWQ_AFF 



Similarly to the way it is done im mbind syscall.

Cc: stable@vger.kernel.org # 5.14
Fixes: fe76421d ("io_uring: allow user configurable IO thread CPU affinity")
Signed-off-by: default avatarEugene Syromiatnikov <esyr@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent cb318216

fs/io_uring.c

+9 −1
Original line number Diff line number Diff line
@@ -11472,7 +11472,15 @@ static __cold int io_register_iowq_aff(struct io_ring_ctx *ctx, 
	if (len > cpumask_size())

		len = cpumask_size();



	if (copy_from_user(new_mask, arg, len)) {

	if (in_compat_syscall()) {

		ret = compat_get_bitmap(cpumask_bits(new_mask),

					(const compat_ulong_t __user *)arg,

					len * 8 /* CHAR_BIT */);

	} else {

		ret = copy_from_user(new_mask, arg, len);

	}



	if (ret) {

		free_cpumask_var(new_mask);

		return -EFAULT;

	}