Commit 8f2a83b4 authored by Kees Cook's avatar Kees Cook Committed by David S. Miller
Browse files

ipv6: Use memset_after() to zero rt6_info 



In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memset(), avoid intentionally writing across
neighboring fields.

Use memset_after() to clear everything after the dst_entry member of
struct rt6_info.

Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e3617433

net/ipv6/route.c

+1 −3
Original line number Diff line number Diff line
@@ -328,9 +328,7 @@ static const struct rt6_info ip6_blk_hole_entry_template = { 


static void rt6_info_init(struct rt6_info *rt)

{

	struct dst_entry *dst = &rt->dst;



	memset(dst + 1, 0, sizeof(*rt) - sizeof(*dst));

	memset_after(rt, 0, dst);

	INIT_LIST_HEAD(&rt->rt6i_uncached);

}