// https://syzkaller.appspot.com/bug?id=3c1f47967b7cbd399d3ba3e65f297a29aa1c5f92 // 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 __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 __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 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(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); rv = system(command); if (panic && 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 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 = 252; if (dup2(tunfd, kTunFd) < 0) fail("dup2(tunfd, kTunFd) failed"); 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) 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; execute_command(1, "sysctl -w net.ipv6.conf.%s.accept_dad=0", TUN_IFACE); execute_command(1, "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 -6 addr add %s/120 dev %s", LOCAL_IPV6, TUN_IFACE); execute_command(1, "ip neigh add %s lladdr %s dev %s nud permanent", REMOTE_IPV4, REMOTE_MAC, TUN_IFACE); execute_command(1, "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); } #define DEV_IPV4 "172.20.20.%d" #define DEV_IPV6 "fe80::%02hx" #define DEV_MAC "aa:aa:aa:aa:aa:%02hx" static void initialize_netdevices(void) { unsigned i; const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "veth"}; const char* devnames[] = {"lo", "sit0", "bridge0", "vcan0", "tunl0", "gre0", "gretap0", "ip_vti0", "ip6_vti0", "ip6tnl0", "ip6gre0", "ip6gretap0", "erspan0", "bond0", "veth0", "veth1"}; for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++) execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]); execute_command(0, "ip link add dev veth1 type veth"); for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) { char addr[32]; snprintf_check(addr, sizeof(addr), DEV_IPV4, i + 10); execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]); snprintf_check(addr, sizeof(addr), DEV_IPV6, i + 10); execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]); snprintf_check(addr, sizeof(addr), DEV_MAC, i + 10); execute_command(0, "ip link set dev %s address %s", devnames[i], addr); execute_command(0, "ip link set dev %s up", devnames[i]); } } 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 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) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } static void setup_cgroups() { if (mkdir("/syzcgroup", 0777)) { } if (mkdir("/syzcgroup/unified", 0777)) { } if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) { } if (chmod("/syzcgroup/unified", 0777)) { } if (!write_file("/syzcgroup/unified/cgroup.subtree_control", "+cpu +memory +io +pids +rdma")) { } if (mkdir("/syzcgroup/cpu", 0777)) { } if (mount("none", "/syzcgroup/cpu", "cgroup", 0, "cpuset,cpuacct,perf_event,hugetlb")) { } if (!write_file("/syzcgroup/cpu/cgroup.clone_children", "1")) { } if (chmod("/syzcgroup/cpu", 0777)) { } if (mkdir("/syzcgroup/net", 0777)) { } if (mount("none", "/syzcgroup/net", "cgroup", 0, "net_cls,net_prio,devices,freezer")) { } if (chmod("/syzcgroup/net", 0777)) { } } 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 = 32 << 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); if (unshare(CLONE_NEWNS)) { } if (unshare(CLONE_NEWIPC)) { } if (unshare(0x02000000)) { } if (unshare(CLONE_NEWUTS)) { } if (unshare(CLONE_SYSVSEM)) { } } 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 (unshare(CLONE_NEWNET)) fail("unshare(CLONE_NEWNET)"); initialize_tun(); initialize_netdevices(); 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"); unsigned mount_flags = MS_BIND | MS_REC | MS_PRIVATE; if (mount("/dev", "./syz-tmp/newroot/dev", NULL, mount_flags, 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/newroot/selinux", 0700)) fail("mkdir failed"); const char* selinux_path = "./syz-tmp/newroot/selinux"; if (mount("/selinux", selinux_path, NULL, mount_flags, NULL)) { if (errno != ENOENT) fail("mount(/selinux) failed"); if (mount("/sys/fs/selinux", selinux_path, NULL, mount_flags, NULL) && errno != ENOENT) fail("mount(/sys/fs/selinux) failed"); } if (mkdir("./syz-tmp/newroot/sys", 0700)) fail("mkdir failed"); if (mount(NULL, "./syz-tmp/newroot/sys", "sysfs", 0, NULL)) fail("mount(sysfs) failed"); if (mkdir("./syz-tmp/newroot/syzcgroup", 0700)) fail("mkdir failed"); if (mkdir("./syz-tmp/newroot/syzcgroup/unified", 0700)) fail("mkdir failed"); if (mkdir("./syz-tmp/newroot/syzcgroup/cpu", 0700)) fail("mkdir failed"); if (mkdir("./syz-tmp/newroot/syzcgroup/net", 0700)) fail("mkdir failed"); if (mount("/syzcgroup/unified", "./syz-tmp/newroot/syzcgroup/unified", NULL, mount_flags, NULL)) { } if (mount("/syzcgroup/cpu", "./syz-tmp/newroot/syzcgroup/cpu", NULL, mount_flags, NULL)) { } if (mount("/syzcgroup/net", "./syz-tmp/newroot/syzcgroup/net", NULL, mount_flags, NULL)) { } 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(void) { int pid; setup_cgroups(); 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, 0); if (pid < 0) fail("sandbox clone failed"); return pid; } static void execute_one(); extern unsigned long long procid; void loop() { while (1) { execute_one(); } } 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 int collide; 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); if (collide && call % 2) break; 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; } } } } uint64_t r[3] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff}; unsigned long long procid; void execute_call(int call) { long res; switch (call) { case 0: NONFAILING(*(uint64_t*)0x20000000 = 0x20ffc000); NONFAILING(*(uint64_t*)0x20000008 = 0); NONFAILING(*(uint32_t*)0x20000010 = 0); NONFAILING(*(uint32_t*)0x20000014 = 0); NONFAILING(*(uint64_t*)0x20000018 = 0x20fff000); NONFAILING(*(uint32_t*)0x20000020 = 0); syscall(__NR_ioctl, -1, 0x4028641b, 0x20000000); break; case 1: NONFAILING(memcpy((void*)0x20000040, "/dev/keychord", 14)); res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000040, 0x40, 0); if (res != -1) r[0] = res; break; case 2: NONFAILING(*(uint64_t*)0x20001780 = 0); NONFAILING(*(uint32_t*)0x20001788 = 0); NONFAILING(*(uint64_t*)0x20001790 = 0x200016c0); NONFAILING(*(uint64_t*)0x200016c0 = 0x20000280); NONFAILING(*(uint64_t*)0x200016c8 = 0x2e); NONFAILING(*(uint64_t*)0x200016d0 = 0x20000340); NONFAILING(*(uint64_t*)0x200016d8 = 0xe0); NONFAILING(*(uint64_t*)0x200016e0 = 0x20000440); NONFAILING(*(uint64_t*)0x200016e8 = 0xee); NONFAILING(*(uint64_t*)0x200016f0 = 0x20000540); NONFAILING(*(uint64_t*)0x200016f8 = 0x1000); NONFAILING(*(uint64_t*)0x20001700 = 0x20001540); NONFAILING(*(uint64_t*)0x20001708 = 0xaa); NONFAILING(*(uint64_t*)0x20001710 = 0x20001600); NONFAILING(*(uint64_t*)0x20001718 = 0x88); NONFAILING(*(uint64_t*)0x20001798 = 6); NONFAILING(*(uint64_t*)0x200017a0 = 0x20001740); NONFAILING(*(uint64_t*)0x200017a8 = 0x26); NONFAILING(*(uint32_t*)0x200017b0 = 0x1000); syscall(__NR_recvmsg, r[0], 0x20001780, 0x10020); break; case 3: NONFAILING(*(uint32_t*)0x20001b40 = 0xe8); res = syscall(__NR_getsockopt, r[0], 0x29, 0x23, 0x20001a40, 0x20001b40); if (res != -1) NONFAILING(r[1] = *(uint32_t*)0x20001a74); break; case 4: NONFAILING(*(uint64_t*)0x20001cc0 = 0x20001a00); NONFAILING(*(uint16_t*)0x20001a00 = 0x10); NONFAILING(*(uint16_t*)0x20001a02 = 0); NONFAILING(*(uint32_t*)0x20001a04 = 0); NONFAILING(*(uint32_t*)0x20001a08 = 0x90000); NONFAILING(*(uint32_t*)0x20001cc8 = 0xc); NONFAILING(*(uint64_t*)0x20001cd0 = 0x20001c80); NONFAILING(*(uint64_t*)0x20001c80 = 0x20001b80); NONFAILING(*(uint32_t*)0x20001b80 = 0xf8); NONFAILING(*(uint16_t*)0x20001b84 = 0x24); NONFAILING(*(uint16_t*)0x20001b86 = 4); NONFAILING(*(uint32_t*)0x20001b88 = 0x70bd26); NONFAILING(*(uint32_t*)0x20001b8c = 0x25dfdbff); NONFAILING(*(uint32_t*)0x20001b90 = 3); NONFAILING(*(uint16_t*)0x20001b94 = 0xe4); NONFAILING(*(uint16_t*)0x20001b96 = 6); NONFAILING(*(uint8_t*)0x20001b98 = 0); NONFAILING(*(uint8_t*)0x20001b99 = 0); NONFAILING(*(uint8_t*)0x20001b9a = 0); NONFAILING(*(uint8_t*)0x20001b9b = 0); NONFAILING(*(uint8_t*)0x20001b9c = 0); NONFAILING(*(uint8_t*)0x20001b9d = 0); NONFAILING(*(uint8_t*)0x20001b9e = 0); NONFAILING(*(uint8_t*)0x20001b9f = 0); NONFAILING(*(uint8_t*)0x20001ba0 = 0); NONFAILING(*(uint8_t*)0x20001ba1 = 0); NONFAILING(*(uint8_t*)0x20001ba2 = -1); NONFAILING(*(uint8_t*)0x20001ba3 = -1); NONFAILING(*(uint32_t*)0x20001ba4 = htobe32(-1)); NONFAILING(*(uint8_t*)0x20001ba8 = 0); NONFAILING(*(uint8_t*)0x20001ba9 = 0); NONFAILING(*(uint8_t*)0x20001baa = 0); NONFAILING(*(uint8_t*)0x20001bab = 0); NONFAILING(*(uint8_t*)0x20001bac = 0); NONFAILING(*(uint8_t*)0x20001bad = 0); NONFAILING(*(uint8_t*)0x20001bae = 0); NONFAILING(*(uint8_t*)0x20001baf = 0); NONFAILING(*(uint8_t*)0x20001bb0 = 0); NONFAILING(*(uint8_t*)0x20001bb1 = 0); NONFAILING(*(uint8_t*)0x20001bb2 = 0); NONFAILING(*(uint8_t*)0x20001bb3 = 0); NONFAILING(*(uint8_t*)0x20001bb4 = 0); NONFAILING(*(uint8_t*)0x20001bb5 = 0); NONFAILING(*(uint8_t*)0x20001bb6 = 0); NONFAILING(*(uint8_t*)0x20001bb7 = 0); NONFAILING(*(uint16_t*)0x20001bb8 = htobe16(0x4e20)); NONFAILING(*(uint16_t*)0x20001bba = htobe16(0)); NONFAILING(*(uint16_t*)0x20001bbc = htobe16(0x4e20)); NONFAILING(*(uint16_t*)0x20001bbe = htobe16(0)); NONFAILING(*(uint16_t*)0x20001bc0 = 0xa); NONFAILING(*(uint8_t*)0x20001bc2 = 0x20); NONFAILING(*(uint8_t*)0x20001bc3 = 0x80); NONFAILING(*(uint8_t*)0x20001bc4 = 6); NONFAILING(*(uint32_t*)0x20001bc8 = 0); NONFAILING(*(uint32_t*)0x20001bcc = r[1]); NONFAILING(*(uint8_t*)0x20001bd0 = 0xac); NONFAILING(*(uint8_t*)0x20001bd1 = 0x14); NONFAILING(*(uint8_t*)0x20001bd2 = 0x14); NONFAILING(*(uint8_t*)0x20001bd3 = 0xaa); NONFAILING(*(uint32_t*)0x20001be0 = htobe32(0x4d2)); NONFAILING(*(uint8_t*)0x20001be4 = -1); NONFAILING(*(uint8_t*)0x20001be8 = 0xac); NONFAILING(*(uint8_t*)0x20001be9 = 0x14); NONFAILING(*(uint8_t*)0x20001bea = 0x14); NONFAILING(*(uint8_t*)0x20001beb = 0xbb); NONFAILING(*(uint64_t*)0x20001bf8 = 2); NONFAILING(*(uint64_t*)0x20001c00 = 2); NONFAILING(*(uint64_t*)0x20001c08 = 0x3ff); NONFAILING(*(uint64_t*)0x20001c10 = 0x69); NONFAILING(*(uint64_t*)0x20001c18 = 0x42); NONFAILING(*(uint64_t*)0x20001c20 = 6); NONFAILING(*(uint64_t*)0x20001c28 = 0xfffffffffffffbff); NONFAILING(*(uint64_t*)0x20001c30 = 3); NONFAILING(*(uint64_t*)0x20001c38 = 6); NONFAILING(*(uint64_t*)0x20001c40 = 5); NONFAILING(*(uint64_t*)0x20001c48 = 1); NONFAILING(*(uint64_t*)0x20001c50 = 4); NONFAILING(*(uint32_t*)0x20001c58 = 0xfff); NONFAILING(*(uint32_t*)0x20001c5c = 0x804); NONFAILING(*(uint32_t*)0x20001c60 = 0x2c); NONFAILING(*(uint32_t*)0x20001c64 = 0x70bd2c); NONFAILING(*(uint32_t*)0x20001c68 = 0x3505); NONFAILING(*(uint16_t*)0x20001c6c = 0xa); NONFAILING(*(uint8_t*)0x20001c6e = 4); NONFAILING(*(uint8_t*)0x20001c6f = 1); NONFAILING(*(uint8_t*)0x20001c70 = 0); NONFAILING(*(uint64_t*)0x20001c88 = 0xf8); NONFAILING(*(uint64_t*)0x20001cd8 = 1); NONFAILING(*(uint64_t*)0x20001ce0 = 0); NONFAILING(*(uint64_t*)0x20001ce8 = 0); NONFAILING(*(uint32_t*)0x20001cf0 = 0x24004040); syscall(__NR_sendmsg, r[0], 0x20001cc0, 0x80); break; case 5: NONFAILING(*(uint64_t*)0x20000240 = 0x200017c0); NONFAILING(*(uint64_t*)0x20000248 = 0); NONFAILING(*(uint64_t*)0x20000250 = 0x20001880); NONFAILING(*(uint64_t*)0x20000258 = 0); NONFAILING(*(uint64_t*)0x20000260 = 0x20000140); NONFAILING(*(uint64_t*)0x20000268 = 0); NONFAILING(*(uint64_t*)0x20000270 = 0x200002c0); NONFAILING(*(uint64_t*)0x20000278 = 0); syscall(__NR_pwritev, r[0], 0x20000240, 4, 0); break; case 6: NONFAILING(memcpy((void*)0x20797ff7, "/dev/sg#", 9)); res = syz_open_dev(0x20797ff7, 0, 0); if (res != -1) r[2] = res; break; case 7: NONFAILING(*(uint32_t*)0x200000c0 = 0); NONFAILING(*(uint32_t*)0x200000c4 = 0); NONFAILING(*(uint32_t*)0x20000100 = 8); syscall(__NR_getsockopt, r[2], 0x84, 0x7b, 0x200000c0, 0x20000100); break; case 8: NONFAILING(*(uint32_t*)0x20000200 = 0x10); syscall(__NR_getsockname, -1, 0x200001c0, 0x20000200); break; case 9: syscall(__NR_ioctl, r[2], 0x20000000002285, 0x20000000); break; case 10: syscall(__NR_read, r[2], 0x20001940, 0x8f); break; } } void execute_one() { execute(11); collide = 1; execute(11); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); 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(); int status = 0; while (waitpid(pid, &status, __WALL) != pid) { } } }