1*e3723e1fSApple OSS Distributions #include <errno.h> 2*e3723e1fSApple OSS Distributions #include <stdio.h> 3*e3723e1fSApple OSS Distributions #include <stdlib.h> 4*e3723e1fSApple OSS Distributions #include <string.h> 5*e3723e1fSApple OSS Distributions #include <strings.h> 6*e3723e1fSApple OSS Distributions 7*e3723e1fSApple OSS Distributions #include <net/route.h> 8*e3723e1fSApple OSS Distributions #include <sys/socket.h> 9*e3723e1fSApple OSS Distributions #include <unistd.h> 10*e3723e1fSApple OSS Distributions 11*e3723e1fSApple OSS Distributions #include <darwintest.h> 12*e3723e1fSApple OSS Distributions 13*e3723e1fSApple OSS Distributions #define ROUNDUP32(n) (((n) + sizeof(uint32_t) - 1) & ~(sizeof(uint32_t) - 1)) 14*e3723e1fSApple OSS Distributions 15*e3723e1fSApple OSS Distributions T_DECL(route_output_stack_oflow_56033075, "Stack overflow via ma_copy through route_output") 16*e3723e1fSApple OSS Distributions { 17*e3723e1fSApple OSS Distributions int s; 18*e3723e1fSApple OSS Distributions uint8_t buf[ 19*e3723e1fSApple OSS Distributions sizeof(struct rt_msghdr) + 20*e3723e1fSApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) + /* RTAX_DST */ 21*e3723e1fSApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) + /* RTAX_GATEWAY */ 22*e3723e1fSApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) /* RTAX_NETMASK */ 23*e3723e1fSApple OSS Distributions ]; 24*e3723e1fSApple OSS Distributions struct rt_msghdr *rtm = (struct rt_msghdr *)buf; 25*e3723e1fSApple OSS Distributions struct sockaddr *sa; 26*e3723e1fSApple OSS Distributions size_t len; 27*e3723e1fSApple OSS Distributions 28*e3723e1fSApple OSS Distributions bzero(buf, sizeof(buf)); 29*e3723e1fSApple OSS Distributions rtm->rtm_type = RTM_GET; 30*e3723e1fSApple OSS Distributions rtm->rtm_version = RTM_VERSION; 31*e3723e1fSApple OSS Distributions rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 32*e3723e1fSApple OSS Distributions len = sizeof(struct rt_msghdr); 33*e3723e1fSApple OSS Distributions 34*e3723e1fSApple OSS Distributions /* RTAX_DST: */ 35*e3723e1fSApple OSS Distributions sa = (struct sockaddr *)(rtm + 1); 36*e3723e1fSApple OSS Distributions sa->sa_family = AF_INET6; 37*e3723e1fSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 38*e3723e1fSApple OSS Distributions memset(&sa->sa_data[0], 0xff, sa->sa_len); 39*e3723e1fSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 40*e3723e1fSApple OSS Distributions 41*e3723e1fSApple OSS Distributions /* RTAX_GATEWAY: */ 42*e3723e1fSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 43*e3723e1fSApple OSS Distributions sa->sa_family = AF_INET6; 44*e3723e1fSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 45*e3723e1fSApple OSS Distributions memset(&sa->sa_data[0], 0xff, sa->sa_len); 46*e3723e1fSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 47*e3723e1fSApple OSS Distributions 48*e3723e1fSApple OSS Distributions /* RTAX_NETMASK: */ 49*e3723e1fSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 50*e3723e1fSApple OSS Distributions sa->sa_family = AF_INET6; 51*e3723e1fSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 52*e3723e1fSApple OSS Distributions memset(&sa->sa_data[0], 0x41, sa->sa_len); 53*e3723e1fSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 54*e3723e1fSApple OSS Distributions 55*e3723e1fSApple OSS Distributions T_SETUPBEGIN; 56*e3723e1fSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(s = socket(PF_ROUTE, SOCK_RAW, PF_ROUTE), NULL); 57*e3723e1fSApple OSS Distributions T_SETUPEND; 58*e3723e1fSApple OSS Distributions 59*e3723e1fSApple OSS Distributions /* check we get EINVAL for > sizeof(struct sockaddr_storage): */ 60*e3723e1fSApple OSS Distributions rtm->rtm_msglen = len; 61*e3723e1fSApple OSS Distributions T_ASSERT_EQ(-1, send(s, buf, len, 0), NULL); 62*e3723e1fSApple OSS Distributions T_ASSERT_EQ(EINVAL, errno, NULL); 63*e3723e1fSApple OSS Distributions 64*e3723e1fSApple OSS Distributions /* now check the ok case: */ 65*e3723e1fSApple OSS Distributions len = sizeof(struct rt_msghdr); 66*e3723e1fSApple OSS Distributions 67*e3723e1fSApple OSS Distributions /* RTAX_DST: */ 68*e3723e1fSApple OSS Distributions sa = (struct sockaddr *)(rtm + 1); 69*e3723e1fSApple OSS Distributions sa->sa_family = AF_INET6; 70*e3723e1fSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 71*e3723e1fSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 72*e3723e1fSApple OSS Distributions 73*e3723e1fSApple OSS Distributions /* RTAX_GATEWAY: */ 74*e3723e1fSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 75*e3723e1fSApple OSS Distributions sa->sa_family = AF_INET6; 76*e3723e1fSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 77*e3723e1fSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 78*e3723e1fSApple OSS Distributions 79*e3723e1fSApple OSS Distributions /* RTAX_NETMASK: */ 80*e3723e1fSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 81*e3723e1fSApple OSS Distributions sa->sa_family = AF_INET6; 82*e3723e1fSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 83*e3723e1fSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 84*e3723e1fSApple OSS Distributions 85*e3723e1fSApple OSS Distributions rtm->rtm_msglen = len; 86*e3723e1fSApple OSS Distributions T_ASSERT_EQ(-1, send(s, buf, len, 0), NULL); 87*e3723e1fSApple OSS Distributions T_ASSERT_EQ(ESRCH, errno, NULL); 88*e3723e1fSApple OSS Distributions } 89