On Mon, Mar 20, 2017 at 10:20:17PM +0000, Toomas Soome wrote:

> Author: tsoome
> Date: Mon Mar 20 22:20:17 2017
> New Revision: 315653
> URL: https://svnweb.freebsd.org/changeset/base/315653
> 
> Log:
>   loader: verify the value from dhcp.interface-mtu and use snprintf to set mtu
>   
>   Since the uset can set dhcp.interface-mtu, we need to try to validate the
>   value. So we verify if the conversion to int is successful and we will not
>   allow to set value greater than max IPv4 packet size.
>   
> +                                 tmp > USHRT_MAX) {
> +                                     printf("%s: bad value: \"%s\", "
> +                                         "ignoring\n",
> +                                         "dhcp.interface-mtu", val);

===
USHRT_MAX       Maximum value for an object of type unsigned short int
65535 (216-1) or greater*

* the actual value depends on the particular system and library
implementation, but shall reflect the limits of these types in the
target platform.
===

I mean IF_MAXMTU more correct.
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