On Mon, Jul 21, 2014 at 11:01:56PM +0300, Julian Anastasov wrote:
> @@ -2333,13 +2339,12 @@ do_ip_vs_set_ctl(struct sock *sk, int cmd, void
> __user *user, unsigned int len)
> struct ip_vs_dest_user_kern udest;
> struct netns_ipvs *ipvs = net_ipvs(net);
>
> + BUILD_BUG_ON(sizeof(arg) > 256);
256 is off-by-one because u8 ranges from 0-255 so we are never able to
copy 256 bytes into the "arg" buffer.
> - if (copylen > 128)
> + if (*len < (int) copylen || *len < 0) {
> + pr_err("get_ctl: len %d < %u\n", *len, copylen);
Don't let users flood dmesg. Just return an error. (This can be
triggered by non-root as well).
> return -EINVAL;
> + }
regards,
dan carpenter
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
