// https://syzkaller.appspot.com/bug?id=5bb8ec59bf8674668ae3df272ec2ec79346096d7 // autogenerated by syzkaller (http://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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include __attribute__((noreturn)) static void doexit(int status) { volatile unsigned i; syscall(__NR_exit_group, status); for (i = 0;; i++) { } } #include #include #include #include #include #include #include #include #include #include const int kFailStatus = 67; const int kRetryStatus = 69; static void fail(const char* msg, ...) { int e = errno; va_list args; va_start(args, msg); vfprintf(stderr, msg, args); va_end(args); fprintf(stderr, " (errno %d)\n", e); doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); } static void exitf(const char* msg, ...) { int e = errno; va_list args; va_start(args, msg); vfprintf(stderr, msg, args); va_end(args); fprintf(stderr, " (errno %d)\n", e); doexit(kRetryStatus); } static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* uctx) { 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); } doexit(sig); } static void install_segv_handler() { 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 uint64_t current_time_ms() { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) fail("clock_gettime failed"); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir() { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) fail("failed to mkdtemp"); if (chmod(tmpdir, 0777)) fail("failed to chmod"); if (chdir(tmpdir)) fail("failed to chdir"); } 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) fail("tun: snprintf failed"); if ((size_t)rv >= size) fail("tun: string '%s...' doesn't fit into buffer", str); } static void snprintf_check(char* str, size_t size, const char* format, ...) { va_list args; va_start(args, format); vsnprintf_check(str, size, format, args); va_end(args); } #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(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); rv = system(command); if (rv != 0) fail("tun: command \"%s\" failed with code %d", &command[0], rv); va_end(args); } static int tunfd = -1; static int tun_frags_enabled; #define SYZ_TUN_MAX_PACKET_SIZE 1000 #define MAX_PIDS 32 #define ADDR_MAX_LEN 32 #define LOCAL_MAC "aa:aa:aa:aa:aa:%02hx" #define REMOTE_MAC "bb:bb:bb:bb:bb:%02hx" #define LOCAL_IPV4 "172.20.%d.170" #define REMOTE_IPV4 "172.20.%d.187" #define LOCAL_IPV6 "fe80::%02hxaa" #define REMOTE_IPV6 "fe80::%02hxbb" #define IFF_NAPI 0x0010 #define IFF_NAPI_FRAGS 0x0020 static void initialize_tun(uint64_t pid) { if (pid >= MAX_PIDS) fail("tun: no more than %d executors", MAX_PIDS); int id = pid; 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; } char iface[IFNAMSIZ]; snprintf_check(iface, sizeof(iface), "syz%d", id); struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, 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) fail("tun: ioctl(TUNSETIFF) failed"); } if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0) fail("tun: ioctl(TUNGETIFF) failed"); tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0; char local_mac[ADDR_MAX_LEN]; snprintf_check(local_mac, sizeof(local_mac), LOCAL_MAC, id); char remote_mac[ADDR_MAX_LEN]; snprintf_check(remote_mac, sizeof(remote_mac), REMOTE_MAC, id); char local_ipv4[ADDR_MAX_LEN]; snprintf_check(local_ipv4, sizeof(local_ipv4), LOCAL_IPV4, id); char remote_ipv4[ADDR_MAX_LEN]; snprintf_check(remote_ipv4, sizeof(remote_ipv4), REMOTE_IPV4, id); char local_ipv6[ADDR_MAX_LEN]; snprintf_check(local_ipv6, sizeof(local_ipv6), LOCAL_IPV6, id); char remote_ipv6[ADDR_MAX_LEN]; snprintf_check(remote_ipv6, sizeof(remote_ipv6), REMOTE_IPV6, id); execute_command("sysctl -w net.ipv6.conf.%s.accept_dad=0", iface); execute_command("sysctl -w net.ipv6.conf.%s.router_solicitations=0", iface); execute_command("ip link set dev %s address %s", iface, local_mac); execute_command("ip addr add %s/24 dev %s", local_ipv4, iface); execute_command("ip -6 addr add %s/120 dev %s", local_ipv6, iface); execute_command("ip neigh add %s lladdr %s dev %s nud permanent", remote_ipv4, remote_mac, iface); execute_command("ip -6 neigh add %s lladdr %s dev %s nud permanent", remote_ipv6, remote_mac, iface); execute_command("ip link set dev %s up", iface); } static void setup_tun(uint64_t pid, bool enable_tun) { if (enable_tun) initialize_tun(pid); } 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; fail("tun: read failed with %d", rv); } return rv; } static void flush_tun() { char data[SYZ_TUN_MAX_PACKET_SIZE]; while (read_tun(&data[0], sizeof(data)) != -1) ; } static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2) { if (a0 == 0xc || a0 == 0xb) { char buf[128]; sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, (uint8_t)a2); return open(buf, O_RDWR, 0); } else { char buf[1024]; char* hash; NONFAILING(strncpy(buf, (char*)a0, sizeof(buf))); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(a1 % 10); a1 /= 10; } return open(buf, a2, 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 = 128 << 20; setrlimit(RLIMIT_AS, &rlim); rlim.rlim_cur = rlim.rlim_max = 8 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 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); #define CLONE_NEWCGROUP 0x02000000 unshare(CLONE_NEWNS); unshare(CLONE_NEWIPC); unshare(CLONE_NEWCGROUP); unshare(CLONE_NEWNET); unshare(CLONE_NEWUTS); unshare(CLONE_SYSVSEM); } static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { close(fd); return false; } close(fd); return true; } static int real_uid; static int real_gid; __attribute__((aligned(64 << 10))) static char sandbox_stack[1 << 20]; static int namespace_sandbox_proc(void* arg) { sandbox_common(); write_file("/proc/self/setgroups", "deny"); if (!write_file("/proc/self/uid_map", "0 %d 1\n", real_uid)) fail("write of /proc/self/uid_map failed"); if (!write_file("/proc/self/gid_map", "0 %d 1\n", real_gid)) fail("write of /proc/self/gid_map failed"); if (mkdir("./syz-tmp", 0777)) fail("mkdir(syz-tmp) failed"); if (mount("", "./syz-tmp", "tmpfs", 0, NULL)) fail("mount(tmpfs) failed"); if (mkdir("./syz-tmp/newroot", 0777)) fail("mkdir failed"); if (mkdir("./syz-tmp/newroot/dev", 0700)) fail("mkdir failed"); if (mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND | MS_REC | MS_PRIVATE, NULL)) fail("mount(dev) failed"); if (mkdir("./syz-tmp/newroot/proc", 0700)) fail("mkdir failed"); if (mount(NULL, "./syz-tmp/newroot/proc", "proc", 0, NULL)) fail("mount(proc) failed"); if (mkdir("./syz-tmp/pivot", 0777)) fail("mkdir failed"); if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) { if (chdir("./syz-tmp")) fail("chdir failed"); } else { if (chdir("/")) fail("chdir failed"); if (umount2("./pivot", MNT_DETACH)) fail("umount failed"); } if (chroot("./newroot")) fail("chroot failed"); if (chdir("/")) fail("chdir failed"); struct __user_cap_header_struct cap_hdr = {}; struct __user_cap_data_struct cap_data[2] = {}; cap_hdr.version = _LINUX_CAPABILITY_VERSION_3; cap_hdr.pid = getpid(); if (syscall(SYS_capget, &cap_hdr, &cap_data)) fail("capget failed"); cap_data[0].effective &= ~(1 << CAP_SYS_PTRACE); cap_data[0].permitted &= ~(1 << CAP_SYS_PTRACE); cap_data[0].inheritable &= ~(1 << CAP_SYS_PTRACE); if (syscall(SYS_capset, &cap_hdr, &cap_data)) fail("capset failed"); loop(); doexit(1); } static int do_sandbox_namespace(int executor_pid, bool enable_tun) { int pid; setup_tun(executor_pid, enable_tun); real_uid = getuid(); real_gid = getgid(); mprotect(sandbox_stack, 4096, PROT_NONE); pid = clone(namespace_sandbox_proc, &sandbox_stack[sizeof(sandbox_stack) - 64], CLONE_NEWUSER | CLONE_NEWPID, NULL); if (pid < 0) fail("sandbox clone failed"); return pid; } static void remove_dir(const char* dir) { DIR* dp; struct dirent* ep; int iter = 0; retry: dp = opendir(dir); if (dp == NULL) { if (errno == EMFILE) { exitf("opendir(%s) failed due to NOFILE, exiting", dir); } exitf("opendir(%s) failed", dir); } 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); struct stat st; if (lstat(filename, &st)) exitf("lstat(%s) failed", filename); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } int i; for (i = 0;; i++) { if (unlink(filename) == 0) break; if (errno == EROFS) { break; } if (errno != EBUSY || i > 100) exitf("unlink(%s) failed", filename); if (umount2(filename, MNT_DETACH)) exitf("umount(%s) failed", filename); } } closedir(dp); int i; for (i = 0;; i++) { if (rmdir(dir) == 0) break; if (i < 100) { if (errno == EROFS) { break; } if (errno == EBUSY) { if (umount2(dir, MNT_DETACH)) exitf("umount(%s) failed", dir); continue; } if (errno == ENOTEMPTY) { if (iter < 100) { iter++; goto retry; } } } exitf("rmdir(%s) failed", dir); } } static void test(); void loop() { int iter; for (iter = 0;; iter++) { char cwdbuf[256]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) fail("failed to mkdir"); int pid = fork(); if (pid < 0) fail("loop fork failed"); if (pid == 0) { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); if (chdir(cwdbuf)) fail("failed to chdir"); flush_tun(); test(); doexit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { int res = waitpid(-1, &status, __WALL | WNOHANG); if (res == pid) break; usleep(1000); if (current_time_ms() - start > 5 * 1000) { kill(-pid, SIGKILL); kill(pid, SIGKILL); while (waitpid(-1, &status, __WALL) != pid) { } break; } } remove_dir(cwdbuf); } } struct thread_t { int created, running, call; pthread_t th; }; 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 (;;) { while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE); syscall(SYS_futex, &th->running, FUTEX_WAKE); } return 0; } static void execute(int num_calls) { int call, thread; running = 0; for (call = 0; call < num_calls; call++) { for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); pthread_create(&th->th, &attr, thr, th); } if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) { th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE); syscall(SYS_futex, &th->running, FUTEX_WAKE); struct timespec ts; ts.tv_sec = 0; ts.tv_nsec = 20 * 1000 * 1000; syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts); if (running) usleep((call == num_calls - 1) ? 10000 : 1000); break; } } } } long r[3]; void execute_call(int call) { switch (call) { case 0: syscall(__NR_mmap, 0x20000000, 0x588000, 3, 0x32, -1, 0); break; case 1: r[0] = syscall(__NR_socket, 0xa, 1, 0); break; case 2: syscall(__NR_mmap, 0x20588000, 0x1000, 3, 0x32, -1, 0); break; case 3: NONFAILING(*(uint32_t*)0x203c2000 = 0xb8); syscall(__NR_getsockopt, r[0], 1, 0x1f, 0x20588000, 0x203c2000); break; case 4: r[1] = syscall(__NR_socket, 0x10, 3, 6); break; case 5: NONFAILING(*(uint64_t*)0x20577fc8 = 0x2026cff4); NONFAILING(*(uint32_t*)0x20577fd0 = 0xc); NONFAILING(*(uint64_t*)0x20577fd8 = 0x20577000); NONFAILING(*(uint64_t*)0x20577fe0 = 1); NONFAILING(*(uint64_t*)0x20577fe8 = 0); NONFAILING(*(uint64_t*)0x20577ff0 = 0); NONFAILING(*(uint32_t*)0x20577ff8 = 0); NONFAILING(*(uint16_t*)0x2026cff4 = 0x10); NONFAILING(*(uint16_t*)0x2026cff6 = 0); NONFAILING(*(uint32_t*)0x2026cff8 = 0); NONFAILING(*(uint32_t*)0x2026cffc = 0); NONFAILING(*(uint64_t*)0x20577000 = 0x2057e000); NONFAILING(*(uint64_t*)0x20577008 = 0x1d8); NONFAILING(*(uint32_t*)0x2057e000 = 0x1d8); NONFAILING(*(uint16_t*)0x2057e004 = 0x1a); NONFAILING(*(uint16_t*)0x2057e006 = 1); NONFAILING(*(uint32_t*)0x2057e008 = 0x70bd25); NONFAILING(*(uint32_t*)0x2057e00c = 0x25dfdbfb); NONFAILING(*(uint8_t*)0x2057e010 = 0); NONFAILING(*(uint8_t*)0x2057e011 = 0); NONFAILING(*(uint8_t*)0x2057e012 = 0); NONFAILING(*(uint8_t*)0x2057e013 = 0); NONFAILING(*(uint8_t*)0x2057e014 = 0); NONFAILING(*(uint8_t*)0x2057e015 = 0); NONFAILING(*(uint8_t*)0x2057e016 = 0); NONFAILING(*(uint8_t*)0x2057e017 = 0); NONFAILING(*(uint8_t*)0x2057e018 = 0); NONFAILING(*(uint8_t*)0x2057e019 = 0); NONFAILING(*(uint8_t*)0x2057e01a = -1); NONFAILING(*(uint8_t*)0x2057e01b = -1); NONFAILING(*(uint8_t*)0x2057e01c = 0xac); NONFAILING(*(uint8_t*)0x2057e01d = 0x14); NONFAILING(*(uint8_t*)0x2057e01e = 0); NONFAILING(*(uint8_t*)0x2057e01f = 0xaa); NONFAILING(*(uint8_t*)0x2057e020 = 0xfe); NONFAILING(*(uint8_t*)0x2057e021 = 0x80); NONFAILING(*(uint8_t*)0x2057e022 = 0); NONFAILING(*(uint8_t*)0x2057e023 = 0); NONFAILING(*(uint8_t*)0x2057e024 = 0); NONFAILING(*(uint8_t*)0x2057e025 = 0); NONFAILING(*(uint8_t*)0x2057e026 = 0); NONFAILING(*(uint8_t*)0x2057e027 = 0); NONFAILING(*(uint8_t*)0x2057e028 = 0); NONFAILING(*(uint8_t*)0x2057e029 = 0); NONFAILING(*(uint8_t*)0x2057e02a = 0); NONFAILING(*(uint8_t*)0x2057e02b = 0); NONFAILING(*(uint8_t*)0x2057e02c = 0); NONFAILING(*(uint8_t*)0x2057e02d = 0); NONFAILING(*(uint8_t*)0x2057e02e = 0); NONFAILING(*(uint8_t*)0x2057e02f = 0xbb); NONFAILING(*(uint16_t*)0x2057e030 = htobe16(0x4e20)); NONFAILING(*(uint16_t*)0x2057e032 = 0); NONFAILING(*(uint16_t*)0x2057e034 = htobe16(0x4e20)); NONFAILING(*(uint16_t*)0x2057e036 = 0); NONFAILING(*(uint16_t*)0x2057e038 = 0); NONFAILING(*(uint8_t*)0x2057e03a = 0); NONFAILING(*(uint8_t*)0x2057e03b = 0); NONFAILING(*(uint8_t*)0x2057e03c = 0); NONFAILING(*(uint32_t*)0x2057e040 = 0); NONFAILING(*(uint32_t*)0x2057e044 = 0); NONFAILING(*(uint32_t*)0x2057e048 = htobe32(0)); NONFAILING(*(uint32_t*)0x2057e058 = htobe32(0x4d2)); NONFAILING(*(uint8_t*)0x2057e05c = 0x32); NONFAILING(*(uint32_t*)0x2057e060 = htobe32(0)); NONFAILING(*(uint64_t*)0x2057e070 = 0); NONFAILING(*(uint64_t*)0x2057e078 = 0); NONFAILING(*(uint64_t*)0x2057e080 = 0); NONFAILING(*(uint64_t*)0x2057e088 = 0); NONFAILING(*(uint64_t*)0x2057e090 = 0); NONFAILING(*(uint64_t*)0x2057e098 = 0); NONFAILING(*(uint64_t*)0x2057e0a0 = 0); NONFAILING(*(uint64_t*)0x2057e0a8 = 0); NONFAILING(*(uint64_t*)0x2057e0b0 = 0); NONFAILING(*(uint64_t*)0x2057e0b8 = 0); NONFAILING(*(uint64_t*)0x2057e0c0 = 0); NONFAILING(*(uint64_t*)0x2057e0c8 = 0); NONFAILING(*(uint32_t*)0x2057e0d0 = 0); NONFAILING(*(uint32_t*)0x2057e0d4 = 0); NONFAILING(*(uint32_t*)0x2057e0d8 = 0); NONFAILING(*(uint32_t*)0x2057e0dc = 0x70bd25); NONFAILING(*(uint32_t*)0x2057e0e0 = 0x34ff); NONFAILING(*(uint16_t*)0x2057e0e4 = 0xa); NONFAILING(*(uint8_t*)0x2057e0e6 = 0); NONFAILING(*(uint8_t*)0x2057e0e7 = 0); NONFAILING(*(uint8_t*)0x2057e0e8 = 0); NONFAILING(*(uint16_t*)0x2057e0f0 = 0xe8); NONFAILING(*(uint16_t*)0x2057e0f2 = 0x12); NONFAILING(memcpy((void*)0x2057e0f4, "\x72\x66\x63\x34\x31\x30\x36\x28\x67\x63\x6d\x28\x61\x65" "\x73\x29\x29\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\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00", 64)); NONFAILING(*(uint32_t*)0x2057e134 = 0x99); NONFAILING(*(uint32_t*)0x2057e138 = 0x80); NONFAILING(memcpy( (void*)0x2057e13c, "\xba\xab\x54\xf2\x33\xd4\xbf\xbe\x68\xdb\xb9\xa3\x56\x7a\x99\x4d\xcc" "\xed\x29\xf1\xad\xf2\x8a\xb2\x52\x18\xec\x04\xab\xef\x93\xf8\x00\x9e" "\xcf\xc8\xd7\xf7\x09\xa0\x8e\xf0\x70\xd7\xf4\x8a\xc7\x14\x06\xd5\xca" "\x58\xfc\x21\xe2\x07\x58\x11\xcf\x8a\xff\x58\xdc\xc3\xe5\x77\x79\xdb" "\xfc\xa9\xf0\xb2\xa2\xba\xf5\xe8\x97\x75\x6a\xd5\xc3\xcc\x23\x5c\x3c" "\x0f\x26\x5e\x17\xf3\x13\xfb\x9b\x9a\x12\xa5\x06\x36\x98\x09\x14\x69" "\x14\xdc\x0f\x6b\x29\x16\x23\x1a\xbf\x93\xfa\xf7\x2d\x43\x03\x95\x4c" "\x9b\xdf\xc1\x6f\x1e\x9a\xf7\xde\x03\x85\x7f\x0c\xc4\xbb\xdd\x47\x17" "\x1e\x0b\x7c\x1b\x4a\x0d\x6d\x1b\xe5\xcd\x51\xea\x00\x00\x00\x1f\x8c", 153)); syscall(__NR_sendmsg, r[1], 0x20577fc8, 0); break; case 6: NONFAILING(memcpy((void*)0x20124ff7, "/dev/sg#", 9)); r[2] = syz_open_dev(0x20124ff7, 0xfff, 0x2180); break; case 7: syscall(__NR_ioctl, r[2], 0x4b69, 0x201c4f53); break; } } void test() { memset(r, -1, sizeof(r)); execute(8); } int main() { install_segv_handler(); char* cwd = get_current_dir_name(); for (;;) { if (chdir(cwd)) fail("failed to chdir"); use_temporary_dir(); int pid = do_sandbox_namespace(0, true); int status = 0; while (waitpid(pid, &status, __WALL) != pid) { } } }