// https://syzkaller.appspot.com/bug?id=24572e21f2a469781d4da7bd8d830390543b2d5e // 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 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 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); } #define DEV_IPV4 "172.20.20.%d" #define DEV_IPV6 "fe80::%02hx" #define DEV_MAC "aa:aa:aa:aa:aa:%02hx" 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); } static void initialize_netdevices(void) { unsigned i; const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "team"}; const char* devnames[] = {"lo", "sit0", "bridge0", "vcan0", "tunl0", "gre0", "gretap0", "ip_vti0", "ip6_vti0", "ip6tnl0", "ip6gre0", "ip6gretap0", "erspan0", "bond0", "veth0", "veth1", "team0", "veth0_to_bridge", "veth1_to_bridge", "veth0_to_bond", "veth1_to_bond", "veth0_to_team", "veth1_to_team"}; const char* devmasters[] = {"bridge", "bond", "team"}; 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 type veth"); for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) { execute_command( 0, "ip link add name %s_slave_0 type veth peer name veth0_to_%s", devmasters[i], devmasters[i]); execute_command( 0, "ip link add name %s_slave_1 type veth peer name veth1_to_%s", devmasters[i], devmasters[i]); execute_command(0, "ip link set %s_slave_0 master %s0", devmasters[i], devmasters[i]); execute_command(0, "ip link set %s_slave_1 master %s0", devmasters[i], devmasters[i]); execute_command(0, "ip link set veth0_to_%s up", devmasters[i]); execute_command(0, "ip link set veth1_to_%s up", devmasters[i]); } execute_command(0, "ip link set bridge_slave_0 up"); execute_command(0, "ip link set bridge_slave_1 up"); 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 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; 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 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_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 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)) exit(1); if (!write_file("/proc/self/gid_map", "0 %d 1\n", real_gid)) exit(1); if (unshare(CLONE_NEWNET)) exit(1); initialize_tun(); initialize_netdevices(); if (mkdir("./syz-tmp", 0777)) exit(1); if (mount("", "./syz-tmp", "tmpfs", 0, NULL)) exit(1); if (mkdir("./syz-tmp/newroot", 0777)) exit(1); if (mkdir("./syz-tmp/newroot/dev", 0700)) exit(1); unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE; if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL)) exit(1); if (mkdir("./syz-tmp/newroot/proc", 0700)) exit(1); if (mount(NULL, "./syz-tmp/newroot/proc", "proc", 0, NULL)) exit(1); if (mkdir("./syz-tmp/newroot/selinux", 0700)) exit(1); const char* selinux_path = "./syz-tmp/newroot/selinux"; if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) { if (errno != ENOENT) exit(1); if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); } if (mkdir("./syz-tmp/newroot/sys", 0700)) exit(1); if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL)) exit(1); if (mkdir("./syz-tmp/pivot", 0777)) exit(1); if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) { if (chdir("./syz-tmp")) exit(1); } else { if (chdir("/")) exit(1); if (umount2("./pivot", MNT_DETACH)) exit(1); } if (chroot("./newroot")) exit(1); if (chdir("/")) exit(1); 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)) exit(1); 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)) exit(1); loop(); exit(1); } #define SYZ_HAVE_SANDBOX_NAMESPACE 1 static int do_sandbox_namespace(void) { int pid; setup_common(); 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); return wait_for_loop(pid); } #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); } 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); } } #ifndef __NR_mmap #define __NR_mmap 192 #endif #ifndef __NR_sendmsg #define __NR_sendmsg 370 #endif #ifndef __NR_socket #define __NR_socket 359 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 uint64_t r[2] = {0xffffffffffffffff, 0x0}; void execute_one(void) { long res = 0; res = syscall(__NR_socket, 0x10, 3, 0x10); if (res != -1) r[0] = res; memcpy((void*)0x20001ac0, "TIPCv2", 7); res = syz_genetlink_get_family_id(0x20001ac0); if (res != -1) r[1] = res; *(uint32_t*)0x20001e40 = 0; *(uint32_t*)0x20001e44 = 0; *(uint32_t*)0x20001e48 = 0x20001e00; *(uint32_t*)0x20001e00 = 0x20001b00; *(uint32_t*)0x20001b00 = 0x2cc; *(uint16_t*)0x20001b04 = r[1]; *(uint16_t*)0x20001b06 = 1; *(uint32_t*)0x20001b08 = 0x70bd2b; *(uint32_t*)0x20001b0c = 0x25dfdbfd; *(uint8_t*)0x20001b10 = 3; *(uint8_t*)0x20001b11 = 0; *(uint16_t*)0x20001b12 = 0; *(uint16_t*)0x20001b14 = 0x70; *(uint16_t*)0x20001b16 = 1; *(uint16_t*)0x20001b18 = 0x2c; *(uint16_t*)0x20001b1a = 4; *(uint16_t*)0x20001b1c = 0x14; *(uint16_t*)0x20001b1e = 1; *(uint16_t*)0x20001b20 = 2; *(uint16_t*)0x20001b22 = htobe16(0x4e24); *(uint8_t*)0x20001b24 = 0xac; *(uint8_t*)0x20001b25 = 0x14; *(uint8_t*)0x20001b26 = 0x14; *(uint8_t*)0x20001b27 = 0x20; *(uint16_t*)0x20001b30 = 0x14; *(uint16_t*)0x20001b32 = 2; *(uint16_t*)0x20001b34 = 2; *(uint16_t*)0x20001b36 = htobe16(0x4e21); *(uint32_t*)0x20001b38 = htobe32(0); *(uint16_t*)0x20001b44 = 0x2c; *(uint16_t*)0x20001b46 = 2; *(uint16_t*)0x20001b48 = 8; *(uint16_t*)0x20001b4a = 4; *(uint32_t*)0x20001b4c = 1; *(uint16_t*)0x20001b50 = 8; *(uint16_t*)0x20001b52 = 4; *(uint32_t*)0x20001b54 = 3; *(uint16_t*)0x20001b58 = 8; *(uint16_t*)0x20001b5a = 2; *(uint32_t*)0x20001b5c = 0; *(uint16_t*)0x20001b60 = 8; *(uint16_t*)0x20001b62 = 1; *(uint32_t*)0x20001b64 = 7; *(uint16_t*)0x20001b68 = 8; *(uint16_t*)0x20001b6a = 2; *(uint32_t*)0x20001b6c = 0xbc4; *(uint16_t*)0x20001b70 = 0x10; *(uint16_t*)0x20001b72 = 1; memcpy((void*)0x20001b74, "udp:syz1", 9); *(uint16_t*)0x20001b80 = 4; *(uint16_t*)0x20001b82 = 2; *(uint16_t*)0x20001b84 = 0x24; *(uint16_t*)0x20001b86 = 9; *(uint16_t*)0x20001b88 = 8; *(uint16_t*)0x20001b8a = 2; *(uint32_t*)0x20001b8c = 0x7fff; *(uint16_t*)0x20001b90 = 8; *(uint16_t*)0x20001b92 = 2; *(uint32_t*)0x20001b94 = 4; *(uint16_t*)0x20001b98 = 8; *(uint16_t*)0x20001b9a = 1; *(uint32_t*)0x20001b9c = 0xfffffff7; *(uint16_t*)0x20001ba0 = 8; *(uint16_t*)0x20001ba2 = 1; *(uint32_t*)0x20001ba4 = 0x7ff; *(uint16_t*)0x20001ba8 = 0x48; *(uint16_t*)0x20001baa = 7; *(uint16_t*)0x20001bac = 8; *(uint16_t*)0x20001bae = 2; *(uint32_t*)0x20001bb0 = 1; *(uint16_t*)0x20001bb4 = 8; *(uint16_t*)0x20001bb6 = 1; *(uint32_t*)0x20001bb8 = 0x800; *(uint16_t*)0x20001bbc = 0xc; *(uint16_t*)0x20001bbe = 4; *(uint64_t*)0x20001bc0 = 1; *(uint16_t*)0x20001bc8 = 0xc; *(uint16_t*)0x20001bca = 3; *(uint64_t*)0x20001bcc = 0x1ff; *(uint16_t*)0x20001bd4 = 0xc; *(uint16_t*)0x20001bd6 = 4; *(uint64_t*)0x20001bd8 = 3; *(uint16_t*)0x20001be0 = 8; *(uint16_t*)0x20001be2 = 1; *(uint32_t*)0x20001be4 = 3; *(uint16_t*)0x20001be8 = 8; *(uint16_t*)0x20001bea = 2; *(uint32_t*)0x20001bec = 0xa1; *(uint16_t*)0x20001bf0 = 0xdc; *(uint16_t*)0x20001bf2 = 4; *(uint16_t*)0x20001bf4 = 0x2c; *(uint16_t*)0x20001bf6 = 7; *(uint16_t*)0x20001bf8 = 8; *(uint16_t*)0x20001bfa = 1; *(uint32_t*)0x20001bfc = 7; *(uint16_t*)0x20001c00 = 8; *(uint16_t*)0x20001c02 = 1; *(uint32_t*)0x20001c04 = 9; *(uint16_t*)0x20001c08 = 8; *(uint16_t*)0x20001c0a = 1; *(uint32_t*)0x20001c0c = 0x12; *(uint16_t*)0x20001c10 = 8; *(uint16_t*)0x20001c12 = 4; *(uint32_t*)0x20001c14 = 5; *(uint16_t*)0x20001c18 = 8; *(uint16_t*)0x20001c1a = 2; *(uint32_t*)0x20001c1c = 6; *(uint16_t*)0x20001c20 = 4; *(uint16_t*)0x20001c22 = 7; *(uint16_t*)0x20001c24 = 0xc; *(uint16_t*)0x20001c26 = 1; memcpy((void*)0x20001c28, "syz0", 5); *(uint16_t*)0x20001c30 = 0x3c; *(uint16_t*)0x20001c32 = 7; *(uint16_t*)0x20001c34 = 8; *(uint16_t*)0x20001c36 = 1; *(uint32_t*)0x20001c38 = 0x12; *(uint16_t*)0x20001c3c = 8; *(uint16_t*)0x20001c3e = 1; *(uint32_t*)0x20001c40 = 3; *(uint16_t*)0x20001c44 = 8; *(uint16_t*)0x20001c46 = 2; *(uint32_t*)0x20001c48 = 0x60e; *(uint16_t*)0x20001c4c = 8; *(uint16_t*)0x20001c4e = 1; *(uint32_t*)0x20001c50 = 2; *(uint16_t*)0x20001c54 = 8; *(uint16_t*)0x20001c56 = 3; *(uint32_t*)0x20001c58 = 0; *(uint16_t*)0x20001c5c = 8; *(uint16_t*)0x20001c5e = 2; *(uint32_t*)0x20001c60 = 1; *(uint16_t*)0x20001c64 = 8; *(uint16_t*)0x20001c66 = 1; *(uint32_t*)0x20001c68 = 0x14; *(uint16_t*)0x20001c6c = 0x34; *(uint16_t*)0x20001c6e = 7; *(uint16_t*)0x20001c70 = 8; *(uint16_t*)0x20001c72 = 4; *(uint32_t*)0x20001c74 = 0x8001; *(uint16_t*)0x20001c78 = 8; *(uint16_t*)0x20001c7a = 1; *(uint32_t*)0x20001c7c = 0x10; *(uint16_t*)0x20001c80 = 8; *(uint16_t*)0x20001c82 = 3; *(uint32_t*)0x20001c84 = 7; *(uint16_t*)0x20001c88 = 8; *(uint16_t*)0x20001c8a = 1; *(uint32_t*)0x20001c8c = 0x18; *(uint16_t*)0x20001c90 = 8; *(uint16_t*)0x20001c92 = 1; *(uint32_t*)0x20001c94 = 0xf; *(uint16_t*)0x20001c98 = 8; *(uint16_t*)0x20001c9a = 2; *(uint32_t*)0x20001c9c = 0x97; *(uint16_t*)0x20001ca0 = 0xc; *(uint16_t*)0x20001ca2 = 1; memcpy((void*)0x20001ca4, "syz0", 5); *(uint16_t*)0x20001cac = 0xc; *(uint16_t*)0x20001cae = 1; memcpy((void*)0x20001cb0, "syz1", 5); *(uint16_t*)0x20001cb8 = 0x14; *(uint16_t*)0x20001cba = 1; memcpy((void*)0x20001cbc, "broadcast-link", 15); *(uint16_t*)0x20001ccc = 0x24; *(uint16_t*)0x20001cce = 9; *(uint16_t*)0x20001cd0 = 8; *(uint16_t*)0x20001cd2 = 2; *(uint32_t*)0x20001cd4 = 0; *(uint16_t*)0x20001cd8 = 8; *(uint16_t*)0x20001cda = 1; *(uint32_t*)0x20001cdc = 6; *(uint16_t*)0x20001ce0 = 8; *(uint16_t*)0x20001ce2 = 1; *(uint32_t*)0x20001ce4 = 0x9ea; *(uint16_t*)0x20001ce8 = 8; *(uint16_t*)0x20001cea = 2; *(uint32_t*)0x20001cec = 6; *(uint16_t*)0x20001cf0 = 0x20; *(uint16_t*)0x20001cf2 = 5; *(uint16_t*)0x20001cf4 = 8; *(uint16_t*)0x20001cf6 = 1; memcpy((void*)0x20001cf8, "eth", 4); *(uint16_t*)0x20001cfc = 0x14; *(uint16_t*)0x20001cfe = 2; *(uint16_t*)0x20001d00 = 8; *(uint16_t*)0x20001d02 = 3; *(uint32_t*)0x20001d04 = 0x5e0d9dba; *(uint16_t*)0x20001d08 = 8; *(uint16_t*)0x20001d0a = 2; *(uint32_t*)0x20001d0c = 5; *(uint16_t*)0x20001d10 = 0xa0; *(uint16_t*)0x20001d12 = 5; *(uint16_t*)0x20001d14 = 0x1c; *(uint16_t*)0x20001d16 = 2; *(uint16_t*)0x20001d18 = 8; *(uint16_t*)0x20001d1a = 3; *(uint32_t*)0x20001d1c = 0x1000; *(uint16_t*)0x20001d20 = 8; *(uint16_t*)0x20001d22 = 2; *(uint32_t*)0x20001d24 = 8; *(uint16_t*)0x20001d28 = 8; *(uint16_t*)0x20001d2a = 2; *(uint32_t*)0x20001d2c = 0x8000; *(uint16_t*)0x20001d30 = 8; *(uint16_t*)0x20001d32 = 1; memcpy((void*)0x20001d34, "ib", 3); *(uint16_t*)0x20001d38 = 0x24; *(uint16_t*)0x20001d3a = 2; *(uint16_t*)0x20001d3c = 8; *(uint16_t*)0x20001d3e = 1; *(uint32_t*)0x20001d40 = 0xb; *(uint16_t*)0x20001d44 = 8; *(uint16_t*)0x20001d46 = 1; *(uint32_t*)0x20001d48 = 0x1d; *(uint16_t*)0x20001d4c = 8; *(uint16_t*)0x20001d4e = 3; *(uint32_t*)0x20001d50 = 1; *(uint16_t*)0x20001d54 = 8; *(uint16_t*)0x20001d56 = 1; *(uint32_t*)0x20001d58 = 0x20; *(uint16_t*)0x20001d5c = 8; *(uint16_t*)0x20001d5e = 1; memcpy((void*)0x20001d60, "ib", 3); *(uint16_t*)0x20001d64 = 0x14; *(uint16_t*)0x20001d66 = 2; *(uint16_t*)0x20001d68 = 8; *(uint16_t*)0x20001d6a = 3; *(uint32_t*)0x20001d6c = 0xfffffdfc; *(uint16_t*)0x20001d70 = 8; *(uint16_t*)0x20001d72 = 4; *(uint32_t*)0x20001d74 = 0xe8; *(uint16_t*)0x20001d78 = 0x1c; *(uint16_t*)0x20001d7a = 2; *(uint16_t*)0x20001d7c = 8; *(uint16_t*)0x20001d7e = 1; *(uint32_t*)0x20001d80 = 9; *(uint16_t*)0x20001d84 = 8; *(uint16_t*)0x20001d86 = 4; *(uint32_t*)0x20001d88 = 0x53; *(uint16_t*)0x20001d8c = 8; *(uint16_t*)0x20001d8e = 1; *(uint32_t*)0x20001d90 = 0xb; *(uint16_t*)0x20001d94 = 0x14; *(uint16_t*)0x20001d96 = 2; *(uint16_t*)0x20001d98 = 8; *(uint16_t*)0x20001d9a = 2; *(uint32_t*)0x20001d9c = 2; *(uint16_t*)0x20001da0 = 8; *(uint16_t*)0x20001da2 = 4; *(uint32_t*)0x20001da4 = 1; *(uint16_t*)0x20001da8 = 8; *(uint16_t*)0x20001daa = 1; memcpy((void*)0x20001dac, "eth", 4); *(uint16_t*)0x20001db0 = 0x1c; *(uint16_t*)0x20001db2 = 7; *(uint16_t*)0x20001db4 = 0xc; *(uint16_t*)0x20001db6 = 4; *(uint64_t*)0x20001db8 = 0xb686; *(uint16_t*)0x20001dc0 = 0xc; *(uint16_t*)0x20001dc2 = 4; *(uint64_t*)0x20001dc4 = 9; *(uint32_t*)0x20001e04 = 0x2cc; *(uint32_t*)0x20001e4c = 1; *(uint32_t*)0x20001e50 = 0; *(uint32_t*)0x20001e54 = 0; *(uint32_t*)0x20001e58 = 0x4000; syscall(__NR_sendmsg, (long)r[0], 0x20001e40, 0x80); } int main(void) { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); for (procid = 0; procid < 6; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_namespace(); } } sleep(1000000); return 0; }