1*8d741a5dSApple OSS Distributions #include <errno.h> 2*8d741a5dSApple OSS Distributions #include <stdio.h> 3*8d741a5dSApple OSS Distributions #include <stdlib.h> 4*8d741a5dSApple OSS Distributions #include <string.h> 5*8d741a5dSApple OSS Distributions #include <strings.h> 6*8d741a5dSApple OSS Distributions 7*8d741a5dSApple OSS Distributions #include <net/route.h> 8*8d741a5dSApple OSS Distributions #include <sys/socket.h> 9*8d741a5dSApple OSS Distributions #include <unistd.h> 10*8d741a5dSApple OSS Distributions 11*8d741a5dSApple OSS Distributions #include <darwintest.h> 12*8d741a5dSApple OSS Distributions 13*8d741a5dSApple OSS Distributions #define ROUNDUP32(n) (((n) + sizeof(uint32_t) - 1) & ~(sizeof(uint32_t) - 1)) 14*8d741a5dSApple OSS Distributions 15*8d741a5dSApple OSS Distributions T_DECL(route_output_stack_oflow_56033075, "Stack overflow via ma_copy through route_output") 16*8d741a5dSApple OSS Distributions { 17*8d741a5dSApple OSS Distributions int s; 18*8d741a5dSApple OSS Distributions uint8_t buf[ 19*8d741a5dSApple OSS Distributions sizeof(struct rt_msghdr) + 20*8d741a5dSApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) + /* RTAX_DST */ 21*8d741a5dSApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) + /* RTAX_GATEWAY */ 22*8d741a5dSApple OSS Distributions ROUNDUP32(sizeof(struct sockaddr_storage) + 1) /* RTAX_NETMASK */ 23*8d741a5dSApple OSS Distributions ]; 24*8d741a5dSApple OSS Distributions struct rt_msghdr *rtm = (struct rt_msghdr *)buf; 25*8d741a5dSApple OSS Distributions struct sockaddr *sa; 26*8d741a5dSApple OSS Distributions size_t len; 27*8d741a5dSApple OSS Distributions 28*8d741a5dSApple OSS Distributions bzero(buf, sizeof(buf)); 29*8d741a5dSApple OSS Distributions rtm->rtm_type = RTM_GET; 30*8d741a5dSApple OSS Distributions rtm->rtm_version = RTM_VERSION; 31*8d741a5dSApple OSS Distributions rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 32*8d741a5dSApple OSS Distributions len = sizeof(struct rt_msghdr); 33*8d741a5dSApple OSS Distributions 34*8d741a5dSApple OSS Distributions /* RTAX_DST: */ 35*8d741a5dSApple OSS Distributions sa = (struct sockaddr *)(rtm + 1); 36*8d741a5dSApple OSS Distributions sa->sa_family = AF_INET6; 37*8d741a5dSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 38*8d741a5dSApple OSS Distributions memset(&sa->sa_data[0], 0xff, sa->sa_len); 39*8d741a5dSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 40*8d741a5dSApple OSS Distributions 41*8d741a5dSApple OSS Distributions /* RTAX_GATEWAY: */ 42*8d741a5dSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 43*8d741a5dSApple OSS Distributions sa->sa_family = AF_INET6; 44*8d741a5dSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 45*8d741a5dSApple OSS Distributions memset(&sa->sa_data[0], 0xff, sa->sa_len); 46*8d741a5dSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 47*8d741a5dSApple OSS Distributions 48*8d741a5dSApple OSS Distributions /* RTAX_NETMASK: */ 49*8d741a5dSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 50*8d741a5dSApple OSS Distributions sa->sa_family = AF_INET6; 51*8d741a5dSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage) + 1; 52*8d741a5dSApple OSS Distributions memset(&sa->sa_data[0], 0x41, sa->sa_len); 53*8d741a5dSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 54*8d741a5dSApple OSS Distributions 55*8d741a5dSApple OSS Distributions T_SETUPBEGIN; 56*8d741a5dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(s = socket(PF_ROUTE, SOCK_RAW, PF_ROUTE), NULL); 57*8d741a5dSApple OSS Distributions T_SETUPEND; 58*8d741a5dSApple OSS Distributions 59*8d741a5dSApple OSS Distributions /* check we get EINVAL for > sizeof(struct sockaddr_storage): */ 60*8d741a5dSApple OSS Distributions rtm->rtm_msglen = len; 61*8d741a5dSApple OSS Distributions T_ASSERT_EQ(-1, send(s, buf, len, 0), NULL); 62*8d741a5dSApple OSS Distributions T_ASSERT_EQ(EINVAL, errno, NULL); 63*8d741a5dSApple OSS Distributions 64*8d741a5dSApple OSS Distributions /* now check the ok case: */ 65*8d741a5dSApple OSS Distributions len = sizeof(struct rt_msghdr); 66*8d741a5dSApple OSS Distributions 67*8d741a5dSApple OSS Distributions /* RTAX_DST: */ 68*8d741a5dSApple OSS Distributions sa = (struct sockaddr *)(rtm + 1); 69*8d741a5dSApple OSS Distributions sa->sa_family = AF_INET6; 70*8d741a5dSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 71*8d741a5dSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 72*8d741a5dSApple OSS Distributions 73*8d741a5dSApple OSS Distributions /* RTAX_GATEWAY: */ 74*8d741a5dSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 75*8d741a5dSApple OSS Distributions sa->sa_family = AF_INET6; 76*8d741a5dSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 77*8d741a5dSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 78*8d741a5dSApple OSS Distributions 79*8d741a5dSApple OSS Distributions /* RTAX_NETMASK: */ 80*8d741a5dSApple OSS Distributions sa = (struct sockaddr *)((void *)buf + len); 81*8d741a5dSApple OSS Distributions sa->sa_family = AF_INET6; 82*8d741a5dSApple OSS Distributions sa->sa_len = sizeof(struct sockaddr_storage); 83*8d741a5dSApple OSS Distributions len += ROUNDUP32(sa->sa_len); 84*8d741a5dSApple OSS Distributions 85*8d741a5dSApple OSS Distributions rtm->rtm_msglen = len; 86*8d741a5dSApple OSS Distributions T_ASSERT_EQ(-1, send(s, buf, len, 0), NULL); 87*8d741a5dSApple OSS Distributions T_ASSERT_EQ(ESRCH, errno, NULL); 88*8d741a5dSApple OSS Distributions } 89