Subject: Re: [PATCH net-next] net: ndisc.c: reduce size of __ndisc_fill_addr_option()

From: Joe Perches <[email-masked]>
Date: Mon, 29 May 2017 20:41:06 -0700

On Mon, 2017-05-29 at 23:30 -0400, David Miller wrote:
> From: yuan linyu <[email-masked]>
> Date: Sat, 27 May 2017 06:00:52 +0800
> 
> > From: yuan linyu <[email-masked]>
> > 
> > Signed-off-by: yuan linyu <[email-masked]>
> 
> Applied, thanks.

OK, but is it really safe though?

Could "space" (an int) ever be negative after
subtracting "pad" and "data_len"?