1*43a90889SApple OSS Distributions #include <errno.h> 2*43a90889SApple OSS Distributions #include <stdio.h> 3*43a90889SApple OSS Distributions #include <stdlib.h> 4*43a90889SApple OSS Distributions #include <string.h> 5*43a90889SApple OSS Distributions #include <strings.h> 6*43a90889SApple OSS Distributions 7*43a90889SApple OSS Distributions #include <net/route.h> 8*43a90889SApple OSS Distributions #include <sys/socket.h> 9*43a90889SApple OSS Distributions #include <unistd.h> 10*43a90889SApple OSS Distributions 11*43a90889SApple OSS Distributions #include <darwintest.h> 12*43a90889SApple OSS Distributions 13*43a90889SApple OSS Distributions #define ROUNDUP32(n) (((n) + sizeof(uint32_t) - 1) & ~(sizeof(uint32_t) - 1)) 14*43a90889SApple OSS Distributions 15*43a90889SApple OSS Distributions T_DECL(route_output_stack_oflow_56033075, "Stack overflow via ma_copy through route_output") 16*43a90889SApple OSS Distributions { 17*43a90889SApple OSS Distributions int s; 18*43a90889SApple OSS Distributions uint8_t buf[ 19*43a90889SApple OSS Distributions sizeof(struct rt_msghdr) + 20*43a90889SApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) + /* RTAX_DST */ 21*43a90889SApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) + /* RTAX_GATEWAY */ 22*43a90889SApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) /* RTAX_NETMASK */ 23*43a90889SApple OSS Distributions ]; 24*43a90889SApple OSS Distributions struct rt_msghdr *rtm = (struct rt_msghdr *)buf; 25*43a90889SApple OSS Distributions struct sockaddr *sa; 26*43a90889SApple OSS Distributions size_t len; 27*43a90889SApple OSS Distributions 28*43a90889SApple OSS Distributions bzero(buf, sizeof(buf)); 29*43a90889SApple OSS Distributions rtm->rtm_type = RTM_GET; 30*43a90889SApple OSS Distributions rtm->rtm_version = RTM_VERSION; 31*43a90889SApple OSS Distributions rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 32*43a90889SApple OSS Distributions len = sizeof(struct rt_msghdr); 33*43a90889SApple OSS Distributions 34*43a90889SApple OSS Distributions /* RTAX_DST: */ 35*43a90889SApple OSS Distributions sa = (struct sockaddr *)(rtm + 1); 36*43a90889SApple OSS Distributions sa->sa_family = AF_INET6; 37*43a90889SApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 38*43a90889SApple OSS Distributions memset(&sa->sa_data[0], 0xff, sa->sa_len); 39*43a90889SApple OSS Distributions len += ROUNDUP32(sa->sa_len); 40*43a90889SApple OSS Distributions 41*43a90889SApple OSS Distributions /* RTAX_GATEWAY: */ 42*43a90889SApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 43*43a90889SApple OSS Distributions sa->sa_family = AF_INET6; 44*43a90889SApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 45*43a90889SApple OSS Distributions memset(&sa->sa_data[0], 0xff, sa->sa_len); 46*43a90889SApple OSS Distributions len += ROUNDUP32(sa->sa_len); 47*43a90889SApple OSS Distributions 48*43a90889SApple OSS Distributions /* RTAX_NETMASK: */ 49*43a90889SApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 50*43a90889SApple OSS Distributions sa->sa_family = AF_INET6; 51*43a90889SApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 52*43a90889SApple OSS Distributions memset(&sa->sa_data[0], 0x41, sa->sa_len); 53*43a90889SApple OSS Distributions len += ROUNDUP32(sa->sa_len); 54*43a90889SApple OSS Distributions 55*43a90889SApple OSS Distributions T_SETUPBEGIN; 56*43a90889SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(s = socket(PF_ROUTE, SOCK_RAW, PF_ROUTE), NULL); 57*43a90889SApple OSS Distributions T_SETUPEND; 58*43a90889SApple OSS Distributions 59*43a90889SApple OSS Distributions /* check we get EINVAL for > sizeof(struct sockaddr_storage): */ 60*43a90889SApple OSS Distributions rtm->rtm_msglen = len; 61*43a90889SApple OSS Distributions T_ASSERT_EQ(-1, send(s, buf, len, 0), NULL); 62*43a90889SApple OSS Distributions T_ASSERT_EQ(EINVAL, errno, NULL); 63*43a90889SApple OSS Distributions 64*43a90889SApple OSS Distributions /* now check the ok case: */ 65*43a90889SApple OSS Distributions len = sizeof(struct rt_msghdr); 66*43a90889SApple OSS Distributions 67*43a90889SApple OSS Distributions /* RTAX_DST: */ 68*43a90889SApple OSS Distributions sa = (struct sockaddr *)(rtm + 1); 69*43a90889SApple OSS Distributions sa->sa_family = AF_INET6; 70*43a90889SApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 71*43a90889SApple OSS Distributions len += ROUNDUP32(sa->sa_len); 72*43a90889SApple OSS Distributions 73*43a90889SApple OSS Distributions /* RTAX_GATEWAY: */ 74*43a90889SApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 75*43a90889SApple OSS Distributions sa->sa_family = AF_INET6; 76*43a90889SApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 77*43a90889SApple OSS Distributions len += ROUNDUP32(sa->sa_len); 78*43a90889SApple OSS Distributions 79*43a90889SApple OSS Distributions /* RTAX_NETMASK: */ 80*43a90889SApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 81*43a90889SApple OSS Distributions sa->sa_family = AF_INET6; 82*43a90889SApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 83*43a90889SApple OSS Distributions len += ROUNDUP32(sa->sa_len); 84*43a90889SApple OSS Distributions 85*43a90889SApple OSS Distributions rtm->rtm_msglen = len; 86*43a90889SApple OSS Distributions T_ASSERT_EQ(-1, send(s, buf, len, 0), NULL); 87*43a90889SApple OSS Distributions T_ASSERT_EQ(ESRCH, errno, NULL); 88*43a90889SApple OSS Distributions } 89