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Commit	Line	Data
	1	#include <errno.h>
	2	#include <stdio.h>
	3	#include <string.h>
	4	#include <stdlib.h>
	5	#include <unistd.h>
	6	#include <arpa/inet.h>
	7	#include <net/if_var.h>
	8	#include <netinet/ip6.h>
	9	#include <darwintest.h>
	10
	11	struct packet1 {
	12	struct ip6_hbh hbh;
	13	struct ip6_opt hbh_opt;
	14	uint8_t hbh_pad[4];
	15	struct ip6_frag frag;
	16	struct ip6_dest dest;
	17	struct ip6_opt dest_opt;
	18	uint8_t dest_pad[4];
	19	};
	20
	21	struct packet2 {
	22	struct ip6_hbh hbh;
	23	struct ip6_opt hbh_opt;
	24	uint8_t hbh_pad[4];
	25	struct ip6_frag frag;
	26	struct ip6_opt dest_opt;
	27	uint8_t dest_pad[6];
	28	uint8_t payload[16];
	29	};
	30
	31	T_DECL(IP6_EXTHDR_CHECK_ICMPV6_61873584, "ICMPv6 test for IP6_EXTHDR_CHECK stale mbuf pointer vulnerability", T_META("as_root", "true"))
	32	{
	33	struct sockaddr_in6 daddr;
	34	struct packet1 packet1;
	35	struct packet2 packet2;
	36	int s, id, res;
	37
	38	srand(time(NULL));
	39	id = rand();
	40
	41	T_SETUPBEGIN;
	42	T_ASSERT_POSIX_SUCCESS(s = socket(AF_INET6, SOCK_RAW, IPPROTO_HOPOPTS), NULL);
	43	T_SETUPEND;
	44
	45	memset(&daddr, 0, sizeof(daddr));
	46	daddr.sin6_family = AF_INET6;
	47	daddr.sin6_port = 0;
	48	inet_pton(AF_INET6, "::1", &daddr.sin6_addr);
	49
	50	memset(&packet1, 'A', sizeof(struct packet1));
	51	packet1.hbh.ip6h_nxt = IPPROTO_FRAGMENT;
	52	packet1.hbh.ip6h_len = 0;
	53	packet1.hbh_opt.ip6o_type = IP6OPT_PADN;
	54	packet1.hbh_opt.ip6o_len = 4;
	55	packet1.frag.ip6f_nxt = IPPROTO_DSTOPTS;
	56	packet1.frag.ip6f_reserved = 0;
	57	packet1.frag.ip6f_offlg = htons(0) \| IP6F_MORE_FRAG;
	58	packet1.frag.ip6f_ident = id;
	59	// Use IPPROTO_RAW for "assertion failed: m->m_flags & M_PKTHDR" panic
	60	// Use IPPROTO_ICMPV6 for "m_free: freeing an already freed mbuf" panic
	61	packet1.dest.ip6d_nxt = IPPROTO_RAW;
	62	packet1.dest.ip6d_len = 1;
	63	packet1.dest_opt.ip6o_type = IP6OPT_PADN;
	64	packet1.dest_opt.ip6o_len = 4;
	65
	66	memset(&packet2, 'B', sizeof(struct packet2));
	67	packet2.hbh.ip6h_nxt = IPPROTO_FRAGMENT;
	68	packet2.hbh.ip6h_len = 0;
	69	packet2.hbh_opt.ip6o_type = IP6OPT_PADN;
	70	packet2.hbh_opt.ip6o_len = 4;
	71	packet2.frag.ip6f_nxt = IPPROTO_DSTOPTS;
	72	packet2.frag.ip6f_reserved = 0;
	73	packet2.frag.ip6f_offlg = htons(8);
	74	packet2.frag.ip6f_ident = id;
	75	packet2.dest_opt.ip6o_type = IP6OPT_PADN;
	76	packet2.dest_opt.ip6o_len = 6;
	77
	78	T_ASSERT_POSIX_SUCCESS(res = sendto(s, (char *)&packet1, sizeof(packet1), 0,
	79	(struct sockaddr *)&daddr, (socklen_t)sizeof(daddr)), NULL);
	80	T_ASSERT_POSIX_SUCCESS(res = sendto(s, (char *)&packet2, sizeof(packet2), 0,
	81	(struct sockaddr *)&daddr, (socklen_t)sizeof(daddr)), NULL);
	82	T_ASSERT_POSIX_SUCCESS(res = close(s), NULL);
	83	}