1*d4514f0bSApple OSS Distributions #include <errno.h> 2*d4514f0bSApple OSS Distributions #include <stdio.h> 3*d4514f0bSApple OSS Distributions #include <stdlib.h> 4*d4514f0bSApple OSS Distributions #include <string.h> 5*d4514f0bSApple OSS Distributions #include <strings.h> 6*d4514f0bSApple OSS Distributions 7*d4514f0bSApple OSS Distributions #include <net/route.h> 8*d4514f0bSApple OSS Distributions #include <sys/socket.h> 9*d4514f0bSApple OSS Distributions #include <unistd.h> 10*d4514f0bSApple OSS Distributions 11*d4514f0bSApple OSS Distributions #include <darwintest.h> 12*d4514f0bSApple OSS Distributions 13*d4514f0bSApple OSS Distributions #define ROUNDUP32(n) (((n) + sizeof(uint32_t) - 1) & ~(sizeof(uint32_t) - 1)) 14*d4514f0bSApple OSS Distributions 15*d4514f0bSApple OSS Distributions T_DECL(route_output_stack_oflow_56033075, "Stack overflow via ma_copy through route_output") 16*d4514f0bSApple OSS Distributions { 17*d4514f0bSApple OSS Distributions int s; 18*d4514f0bSApple OSS Distributions uint8_t buf[ 19*d4514f0bSApple OSS Distributions sizeof(struct rt_msghdr) + 20*d4514f0bSApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) + /* RTAX_DST */ 21*d4514f0bSApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) + /* RTAX_GATEWAY */ 22*d4514f0bSApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) /* RTAX_NETMASK */ 23*d4514f0bSApple OSS Distributions ]; 24*d4514f0bSApple OSS Distributions struct rt_msghdr *rtm = (struct rt_msghdr *)buf; 25*d4514f0bSApple OSS Distributions struct sockaddr *sa; 26*d4514f0bSApple OSS Distributions size_t len; 27*d4514f0bSApple OSS Distributions 28*d4514f0bSApple OSS Distributions bzero(buf, sizeof(buf)); 29*d4514f0bSApple OSS Distributions rtm->rtm_type = RTM_GET; 30*d4514f0bSApple OSS Distributions rtm->rtm_version = RTM_VERSION; 31*d4514f0bSApple OSS Distributions rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 32*d4514f0bSApple OSS Distributions len = sizeof(struct rt_msghdr); 33*d4514f0bSApple OSS Distributions 34*d4514f0bSApple OSS Distributions /* RTAX_DST: */ 35*d4514f0bSApple OSS Distributions sa = (struct sockaddr *)(rtm + 1); 36*d4514f0bSApple OSS Distributions sa->sa_family = AF_INET6; 37*d4514f0bSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 38*d4514f0bSApple OSS Distributions memset(&sa->sa_data[0], 0xff, sa->sa_len); 39*d4514f0bSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 40*d4514f0bSApple OSS Distributions 41*d4514f0bSApple OSS Distributions /* RTAX_GATEWAY: */ 42*d4514f0bSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 43*d4514f0bSApple OSS Distributions sa->sa_family = AF_INET6; 44*d4514f0bSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 45*d4514f0bSApple OSS Distributions memset(&sa->sa_data[0], 0xff, sa->sa_len); 46*d4514f0bSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 47*d4514f0bSApple OSS Distributions 48*d4514f0bSApple OSS Distributions /* RTAX_NETMASK: */ 49*d4514f0bSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 50*d4514f0bSApple OSS Distributions sa->sa_family = AF_INET6; 51*d4514f0bSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 52*d4514f0bSApple OSS Distributions memset(&sa->sa_data[0], 0x41, sa->sa_len); 53*d4514f0bSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 54*d4514f0bSApple OSS Distributions 55*d4514f0bSApple OSS Distributions T_SETUPBEGIN; 56*d4514f0bSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(s = socket(PF_ROUTE, SOCK_RAW, PF_ROUTE), NULL); 57*d4514f0bSApple OSS Distributions T_SETUPEND; 58*d4514f0bSApple OSS Distributions 59*d4514f0bSApple OSS Distributions /* check we get EINVAL for > sizeof(struct sockaddr_storage): */ 60*d4514f0bSApple OSS Distributions rtm->rtm_msglen = len; 61*d4514f0bSApple OSS Distributions T_ASSERT_EQ(-1, send(s, buf, len, 0), NULL); 62*d4514f0bSApple OSS Distributions T_ASSERT_EQ(EINVAL, errno, NULL); 63*d4514f0bSApple OSS Distributions 64*d4514f0bSApple OSS Distributions /* now check the ok case: */ 65*d4514f0bSApple OSS Distributions len = sizeof(struct rt_msghdr); 66*d4514f0bSApple OSS Distributions 67*d4514f0bSApple OSS Distributions /* RTAX_DST: */ 68*d4514f0bSApple OSS Distributions sa = (struct sockaddr *)(rtm + 1); 69*d4514f0bSApple OSS Distributions sa->sa_family = AF_INET6; 70*d4514f0bSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 71*d4514f0bSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 72*d4514f0bSApple OSS Distributions 73*d4514f0bSApple OSS Distributions /* RTAX_GATEWAY: */ 74*d4514f0bSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 75*d4514f0bSApple OSS Distributions sa->sa_family = AF_INET6; 76*d4514f0bSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 77*d4514f0bSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 78*d4514f0bSApple OSS Distributions 79*d4514f0bSApple OSS Distributions /* RTAX_NETMASK: */ 80*d4514f0bSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 81*d4514f0bSApple OSS Distributions sa->sa_family = AF_INET6; 82*d4514f0bSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 83*d4514f0bSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 84*d4514f0bSApple OSS Distributions 85*d4514f0bSApple OSS Distributions rtm->rtm_msglen = len; 86*d4514f0bSApple OSS Distributions T_ASSERT_EQ(-1, send(s, buf, len, 0), NULL); 87*d4514f0bSApple OSS Distributions T_ASSERT_EQ(ESRCH, errno, NULL); 88*d4514f0bSApple OSS Distributions } 89