// https://syzkaller.appspot.com/bug?id=7d3ae3514bf9a76edadf2da36fb388a70e37a3d0 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include unsigned long long procid; static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* ctx) { uintptr_t addr = (uintptr_t)info->si_addr; const uintptr_t prog_start = 1 << 20; const uintptr_t prog_end = 100 << 20; if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) && (addr < prog_start || addr > prog_end)) { _longjmp(segv_env, 1); } exit(sig); } static void install_segv_handler(void) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); sa.sa_handler = SIG_IGN; syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); memset(&sa, 0, sizeof(sa)); sa.sa_sigaction = segv_handler; sa.sa_flags = SA_NODEFER | SA_SIGINFO; sigaction(SIGSEGV, &sa, NULL); sigaction(SIGBUS, &sa, NULL); } #define NONFAILING(...) \ { \ __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ if (_setjmp(segv_env) == 0) { \ __VA_ARGS__; \ } \ __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ } static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); if (pthread_create(&th, &attr, fn, arg)) exit(1); pthread_attr_destroy(&attr); } typedef struct { int state; } event_t; static void event_init(event_t* ev) { ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { if (ev->state) exit(1); __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG); } static void event_wait(event_t* ev) { while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); } static int event_isset(event_t* ev) { return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; for (;;) { uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED)) return 1; now = current_time_ms(); if (now - start > timeout) return 0; } } static void vsnprintf_check(char* str, size_t size, const char* format, va_list args) { int rv; rv = vsnprintf(str, size, format, args); if (rv < 0) exit(1); if ((size_t)rv >= size) exit(1); } #define COMMAND_MAX_LEN 128 #define PATH_PREFIX \ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin " #define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1) static void execute_command(bool panic, const char* format, ...) { va_list args; char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN]; int rv; va_start(args, format); memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN); vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args); va_end(args); rv = system(command); if (rv) { if (panic) exit(1); } } static int tunfd = -1; static int tun_frags_enabled; #define SYZ_TUN_MAX_PACKET_SIZE 1000 #define TUN_IFACE "syz_tun" #define LOCAL_MAC "aa:aa:aa:aa:aa:aa" #define REMOTE_MAC "aa:aa:aa:aa:aa:bb" #define LOCAL_IPV4 "172.20.20.170" #define REMOTE_IPV4 "172.20.20.187" #define LOCAL_IPV6 "fe80::aa" #define REMOTE_IPV6 "fe80::bb" #define IFF_NAPI 0x0010 #define IFF_NAPI_FRAGS 0x0020 static void initialize_tun(void) { tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK); if (tunfd == -1) { printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n"); printf("otherwise fuzzing or reproducing might not work as intended\n"); return; } const int kTunFd = 240; if (dup2(tunfd, kTunFd) < 0) exit(1); close(tunfd); tunfd = kTunFd; struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ); ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_NAPI | IFF_NAPI_FRAGS; if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) { ifr.ifr_flags = IFF_TAP | IFF_NO_PI; if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) exit(1); } if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0) exit(1); tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0; execute_command(0, "sysctl -w net.ipv6.conf.%s.accept_dad=0", TUN_IFACE); execute_command(0, "sysctl -w net.ipv6.conf.%s.router_solicitations=0", TUN_IFACE); execute_command(1, "ip link set dev %s address %s", TUN_IFACE, LOCAL_MAC); execute_command(1, "ip addr add %s/24 dev %s", LOCAL_IPV4, TUN_IFACE); execute_command(1, "ip neigh add %s lladdr %s dev %s nud permanent", REMOTE_IPV4, REMOTE_MAC, TUN_IFACE); execute_command(0, "ip -6 addr add %s/120 dev %s", LOCAL_IPV6, TUN_IFACE); execute_command(0, "ip -6 neigh add %s lladdr %s dev %s nud permanent", REMOTE_IPV6, REMOTE_MAC, TUN_IFACE); execute_command(1, "ip link set dev %s up", TUN_IFACE); } static int read_tun(char* data, int size) { if (tunfd < 0) return -1; int rv = read(tunfd, data, size); if (rv < 0) { if (errno == EAGAIN) return -1; if (errno == EBADFD) return -1; exit(1); } return rv; } static void flush_tun() { char data[SYZ_TUN_MAX_PACKET_SIZE]; while (read_tun(&data[0], sizeof(data)) != -1) { } } static long syz_genetlink_get_family_id(long name) { char buf[512] = {0}; struct nlmsghdr* hdr = (struct nlmsghdr*)buf; struct genlmsghdr* genlhdr = (struct genlmsghdr*)NLMSG_DATA(hdr); struct nlattr* attr = (struct nlattr*)(genlhdr + 1); hdr->nlmsg_len = sizeof(*hdr) + sizeof(*genlhdr) + sizeof(*attr) + GENL_NAMSIZ; hdr->nlmsg_type = GENL_ID_CTRL; hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; genlhdr->cmd = CTRL_CMD_GETFAMILY; attr->nla_type = CTRL_ATTR_FAMILY_NAME; attr->nla_len = sizeof(*attr) + GENL_NAMSIZ; NONFAILING(strncpy((char*)(attr + 1), (char*)name, GENL_NAMSIZ)); struct iovec iov = {hdr, hdr->nlmsg_len}; struct sockaddr_nl addr = {0}; addr.nl_family = AF_NETLINK; int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (fd == -1) { return -1; } struct msghdr msg = {&addr, sizeof(addr), &iov, 1, NULL, 0, 0}; if (sendmsg(fd, &msg, 0) == -1) { close(fd); return -1; } ssize_t n = recv(fd, buf, sizeof(buf), 0); close(fd); if (n <= 0) { return -1; } if (hdr->nlmsg_type != GENL_ID_CTRL) { return -1; } for (; (char*)attr < buf + n; attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) { if (attr->nla_type == CTRL_ATTR_FAMILY_ID) return *(uint16_t*)(attr + 1); } return -1; } static void setup_common() { if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) { } } static void loop(); static void sandbox_common() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); setsid(); struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 200 << 20; setrlimit(RLIMIT_AS, &rlim); rlim.rlim_cur = rlim.rlim_max = 32 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 136 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); if (unshare(CLONE_NEWNS)) { } if (unshare(CLONE_NEWIPC)) { } if (unshare(0x02000000)) { } if (unshare(CLONE_NEWUTS)) { } if (unshare(CLONE_SYSVSEM)) { } } int wait_for_loop(int pid) { if (pid < 0) exit(1); int status = 0; while (waitpid(-1, &status, __WALL) != pid) { } return WEXITSTATUS(status); } static int do_sandbox_none(void) { if (unshare(CLONE_NEWPID)) { } int pid = fork(); if (pid != 0) return wait_for_loop(pid); setup_common(); sandbox_common(); if (unshare(CLONE_NEWNET)) { } initialize_tun(); loop(); exit(1); } #define FS_IOC_SETFLAGS _IOW('f', 2, long) static void remove_dir(const char* dir) { DIR* dp; struct dirent* ep; int iter = 0; retry: while (umount2(dir, MNT_DETACH) == 0) { } dp = opendir(dir); if (dp == NULL) { if (errno == EMFILE) { exit(1); } exit(1); } while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); while (umount2(filename, MNT_DETACH) == 0) { } struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } int i; for (i = 0;; i++) { if (unlink(filename) == 0) break; if (errno == EPERM) { int fd = open(filename, O_RDONLY); if (fd != -1) { long flags = 0; if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) close(fd); continue; } } if (errno == EROFS) { break; } if (errno != EBUSY || i > 100) exit(1); if (umount2(filename, MNT_DETACH)) exit(1); } } closedir(dp); int i; for (i = 0;; i++) { if (rmdir(dir) == 0) break; if (i < 100) { if (errno == EPERM) { int fd = open(dir, O_RDONLY); if (fd != -1) { long flags = 0; if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) close(fd); continue; } } if (errno == EROFS) { break; } if (errno == EBUSY) { if (umount2(dir, MNT_DETACH)) exit(1); continue; } if (errno == ENOTEMPTY) { if (iter < 100) { iter++; goto retry; } } } exit(1); } } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); int i; for (i = 0; i < 100; i++) { if (waitpid(-1, status, WNOHANG | __WALL) == pid) return; usleep(1000); } DIR* dir = opendir("/sys/fs/fuse/connections"); if (dir) { for (;;) { struct dirent* ent = readdir(dir); if (!ent) break; if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) continue; char abort[300]; snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name); int fd = open(abort, O_WRONLY); if (fd == -1) { continue; } if (write(fd, abort, 1) < 0) { } close(fd); } closedir(dir); } else { } while (waitpid(-1, status, __WALL) != pid) { } } #define SYZ_HAVE_SETUP_TEST 1 static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); flush_tun(); } #define SYZ_HAVE_RESET_TEST 1 static void reset_test() { int fd; for (fd = 3; fd < 30; fd++) close(fd); } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { int i, call, thread; int collide = 0; again: for (call = 0; call < 8; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (collide && (call % 2) == 0) break; event_timedwait(&th->done, 45); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); if (!collide) { collide = 1; goto again; } } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter; for (iter = 0;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); setup_test(); execute_one(); reset_test(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5 * 1000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[1] = {0xffffffffffffffff}; void execute_call(int call) { long res; switch (call) { case 0: syscall(__NR_socket, 0x10, 3, 0x10); break; case 1: syz_genetlink_get_family_id(0); break; case 2: syscall(__NR_recvfrom, -1, 0, 0, 0, 0, 0); break; case 3: res = syscall(__NR_socket, 2, 3, 0xa); if (res != -1) r[0] = res; break; case 4: NONFAILING(memcpy((void*)0x200004c0, "nat\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00", 32)); NONFAILING(*(uint32_t*)0x200004e0 = 0x19); NONFAILING(*(uint32_t*)0x200004e4 = 1); NONFAILING(*(uint32_t*)0x200004e8 = 0x1c0); NONFAILING(*(uint64_t*)0x200004f0 = 0x200002c0); NONFAILING(*(uint64_t*)0x200004f8 = 0); NONFAILING(*(uint64_t*)0x20000500 = 0); NONFAILING(*(uint64_t*)0x20000508 = 0x200002f0); NONFAILING(*(uint64_t*)0x20000510 = 0x20000320); NONFAILING(*(uint64_t*)0x20000518 = 0); NONFAILING(*(uint32_t*)0x20000520 = 0x6000000); NONFAILING(*(uint64_t*)0x20000528 = 0); NONFAILING(*(uint64_t*)0x20000530 = 0x200002c0); NONFAILING(*(uint32_t*)0x200002c0 = 0); NONFAILING(memcpy((void*)0x200002c4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00", 32)); NONFAILING(*(uint32_t*)0x200002e4 = 0); NONFAILING(*(uint32_t*)0x200002e8 = -1); NONFAILING(*(uint32_t*)0x200002ec = 0); NONFAILING(*(uint32_t*)0x200002f0 = 0); NONFAILING(memcpy((void*)0x200002f4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00", 32)); NONFAILING(*(uint32_t*)0x20000314 = 0); NONFAILING(*(uint32_t*)0x20000318 = -1); NONFAILING(*(uint32_t*)0x2000031c = 0); NONFAILING(*(uint32_t*)0x20000320 = 0); NONFAILING(memcpy((void*)0x20000324, "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00", 32)); NONFAILING(*(uint32_t*)0x20000344 = 0); NONFAILING(*(uint32_t*)0x20000348 = -1); NONFAILING(*(uint32_t*)0x2000034c = 0); NONFAILING(*(uint32_t*)0x20000350 = 0); NONFAILING(memcpy((void*)0x20000354, "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00", 32)); NONFAILING(*(uint32_t*)0x20000374 = 0); NONFAILING(*(uint32_t*)0x20000378 = -1); NONFAILING(*(uint32_t*)0x2000037c = 1); NONFAILING(*(uint32_t*)0x20000380 = 0x11); NONFAILING(*(uint32_t*)0x20000384 = 0); NONFAILING(*(uint16_t*)0x20000388 = htobe16(0x806)); NONFAILING(memcpy((void*)0x2000038a, "\x03\x00sf0\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00", 16)); NONFAILING(memcpy((void*)0x2000039a, "dummy0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16)); NONFAILING(memcpy((void*)0x200003aa, "ifb0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16)); NONFAILING(memcpy( (void*)0x200003ba, "lo\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16)); NONFAILING(*(uint8_t*)0x200003ca = -1); NONFAILING(*(uint8_t*)0x200003cb = -1); NONFAILING(*(uint8_t*)0x200003cc = -1); NONFAILING(*(uint8_t*)0x200003cd = -1); NONFAILING(*(uint8_t*)0x200003ce = -1); NONFAILING(*(uint8_t*)0x200003cf = -1); NONFAILING(*(uint8_t*)0x200003d0 = 0); NONFAILING(*(uint8_t*)0x200003d1 = 0); NONFAILING(*(uint8_t*)0x200003d2 = 0); NONFAILING(*(uint8_t*)0x200003d3 = 0); NONFAILING(*(uint8_t*)0x200003d4 = 0); NONFAILING(*(uint8_t*)0x200003d5 = 0); NONFAILING(*(uint8_t*)0x200003d6 = -1); NONFAILING(*(uint8_t*)0x200003d7 = -1); NONFAILING(*(uint8_t*)0x200003d8 = -1); NONFAILING(*(uint8_t*)0x200003d9 = -1); NONFAILING(*(uint8_t*)0x200003da = -1); NONFAILING(*(uint8_t*)0x200003db = -1); NONFAILING(*(uint8_t*)0x200003dc = 0); NONFAILING(*(uint8_t*)0x200003dd = 0); NONFAILING(*(uint8_t*)0x200003de = 0); NONFAILING(*(uint8_t*)0x200003df = 0); NONFAILING(*(uint8_t*)0x200003e0 = 0); NONFAILING(*(uint8_t*)0x200003e1 = 0); NONFAILING(*(uint32_t*)0x200003e4 = 0xd0); NONFAILING(*(uint32_t*)0x200003e8 = 0xd0); NONFAILING(*(uint32_t*)0x200003ec = 0x100); NONFAILING(memcpy((void*)0x200003f0, "arp\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00", 32)); NONFAILING(*(uint32_t*)0x20000410 = 0x38); NONFAILING(*(uint16_t*)0x20000418 = htobe16(0)); NONFAILING(*(uint16_t*)0x2000041a = htobe16(0)); NONFAILING(*(uint16_t*)0x2000041c = htobe16(0)); NONFAILING(*(uint32_t*)0x20000420 = htobe32(0xe0000001)); NONFAILING(*(uint32_t*)0x20000424 = htobe32(0)); NONFAILING(*(uint32_t*)0x20000428 = htobe32(0x7f000001)); NONFAILING(*(uint32_t*)0x2000042c = htobe32(0)); NONFAILING(*(uint8_t*)0x20000430 = 0); NONFAILING(*(uint8_t*)0x20000431 = 0); NONFAILING(*(uint8_t*)0x20000432 = 0); NONFAILING(*(uint8_t*)0x20000433 = 0); NONFAILING(*(uint8_t*)0x20000434 = 0); NONFAILING(*(uint8_t*)0x20000435 = 0); NONFAILING(*(uint8_t*)0x20000436 = 0); NONFAILING(*(uint8_t*)0x20000437 = 0); NONFAILING(*(uint8_t*)0x20000438 = 0); NONFAILING(*(uint8_t*)0x20000439 = 0); NONFAILING(*(uint8_t*)0x2000043a = 0); NONFAILING(*(uint8_t*)0x2000043b = 0); NONFAILING(*(uint8_t*)0x2000043c = 0xaa); NONFAILING(*(uint8_t*)0x2000043d = 0xaa); NONFAILING(*(uint8_t*)0x2000043e = 0xaa); NONFAILING(*(uint8_t*)0x2000043f = 0xaa); NONFAILING(*(uint8_t*)0x20000440 = 0xaa); NONFAILING(*(uint8_t*)0x20000441 = 0); NONFAILING(*(uint8_t*)0x20000442 = 0); NONFAILING(*(uint8_t*)0x20000443 = 0); NONFAILING(*(uint8_t*)0x20000444 = 0); NONFAILING(*(uint8_t*)0x20000445 = 0); NONFAILING(*(uint8_t*)0x20000446 = 0); NONFAILING(*(uint8_t*)0x20000447 = 0); NONFAILING(*(uint8_t*)0x20000448 = 0); NONFAILING(*(uint8_t*)0x20000449 = 0); NONFAILING(memcpy((void*)0x20000450, "redirect\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00", 32)); NONFAILING(*(uint32_t*)0x20000470 = 8); NONFAILING(*(uint32_t*)0x20000478 = -1); syscall(__NR_setsockopt, r[0], 0, 0x80, 0x200004c0, 0x238); break; case 5: syscall(__NR_socket, 0x10, 3, 0x10); break; case 6: syscall(__NR_getsockopt, 0xffffff9c, 0x84, 0x7b, 0, 0); break; case 7: syscall(__NR_socket, 2, 3, 0xa); break; } } int main(void) { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); install_segv_handler(); for (procid = 0; procid < 6; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_none(); } } sleep(1000000); return 0; }