On Mon, 2016-04-18 at 23:41 -0400, David Miller wrote: > > + /* Add a zero length NOP attribute so that the nla_data() > + * of the IFLA_STATS64 will be 64-bit aligned. > + */ > +#ifndef HAVE_EFFICIENT_UNALIGNED_ACCESS > + attr = nla_reserve(skb, IFLA_PAD, 0); > + if (!attr) > + return -EMSGSIZE; > +#endif
You must do this only if current skb->data alignment is not correct. (IFLA_ALIAS for example could shift your expectations) Also you probably want to change if_nlmsg_size() to add + nla_total_size(0) /* IFLA_PAD */
