dhcpcd-discuss

Hi Roy,

I found that by sending the same exact DHCP response to two different
DHCP requests on different interfaces, I was able to segfault dhcpcd.
The attached patch fixes the problem, though you might want to
investigate a bit further precisely why this is necessary.

Regards,
Jason

diff -ru dhcpcd-7.0.0-rc1/src/ipv4.c dhcpcd-7.0.0-rc1-fixed/src/ipv4.c
--- dhcpcd-7.0.0-rc1/src/ipv4.c	2017-05-10 12:24:28.000000000 +0200
+++ dhcpcd-7.0.0-rc1-fixed/src/ipv4.c	2017-06-23 22:37:55.929857908 +0200
@@ -255,7 +255,7 @@
 	int n;
 
 	state = D_CSTATE(ifp);
-	if (state == NULL || state->state != DHS_BOUND)
+	if (state == NULL || state->state != DHS_BOUND || state->addr == NULL)
 		return 0;
 
 	TAILQ_INIT(&nroutes);