// https://syzkaller.appspot.com/bug?id=2576ffa473c0be4060c9201f23e9b4d26724816d // 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 __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); } #define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1) #define BITMASK_LEN_OFF(type, bf_off, bf_len) \ (type)(BITMASK_LEN(type, (bf_len)) << (bf_off)) #define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len) \ if ((bf_off) == 0 && (bf_len) == 0) { \ *(type*)(addr) = (type)(val); \ } else { \ type new_val = *(type*)(addr); \ new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len)); \ new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off); \ *(type*)(addr) = new_val; \ } 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); } #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) fail("command '%s' failed: %d", &command[0], rv); } } 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(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; 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 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 setup_binfmt_misc() { if (!write_file("/proc/sys/fs/binfmt_misc/register", ":syz0:M:0:syz0::./file0:")) { } if (!write_file("/proc/sys/fs/binfmt_misc/register", ":syz1:M:1:yz1::./file0:POC")) { } } 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 = 160 << 20; setrlimit(RLIMIT_AS, &rlim); rlim.rlim_cur = rlim.rlim_max = 8 << 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); 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) fail("sandbox fork failed"); 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_cgroups(); setup_binfmt_misc(); sandbox_common(); if (unshare(CLONE_NEWNET)) { } initialize_tun(); initialize_netdevices(); loop(); doexit(1); } #define XT_TABLE_SIZE 1536 #define XT_MAX_ENTRIES 10 struct xt_counters { uint64_t pcnt, bcnt; }; struct ipt_getinfo { char name[32]; unsigned int valid_hooks; unsigned int hook_entry[5]; unsigned int underflow[5]; unsigned int num_entries; unsigned int size; }; struct ipt_get_entries { char name[32]; unsigned int size; void* entrytable[XT_TABLE_SIZE / sizeof(void*)]; }; struct ipt_replace { char name[32]; unsigned int valid_hooks; unsigned int num_entries; unsigned int size; unsigned int hook_entry[5]; unsigned int underflow[5]; unsigned int num_counters; struct xt_counters* counters; char entrytable[XT_TABLE_SIZE]; }; struct ipt_table_desc { const char* name; struct ipt_getinfo info; struct ipt_replace replace; }; static struct ipt_table_desc ipv4_tables[] = { {.name = "filter"}, {.name = "nat"}, {.name = "mangle"}, {.name = "raw"}, {.name = "security"}, }; static struct ipt_table_desc ipv6_tables[] = { {.name = "filter"}, {.name = "nat"}, {.name = "mangle"}, {.name = "raw"}, {.name = "security"}, }; #define IPT_BASE_CTL 64 #define IPT_SO_SET_REPLACE (IPT_BASE_CTL) #define IPT_SO_GET_INFO (IPT_BASE_CTL) #define IPT_SO_GET_ENTRIES (IPT_BASE_CTL + 1) struct arpt_getinfo { char name[32]; unsigned int valid_hooks; unsigned int hook_entry[3]; unsigned int underflow[3]; unsigned int num_entries; unsigned int size; }; struct arpt_get_entries { char name[32]; unsigned int size; void* entrytable[XT_TABLE_SIZE / sizeof(void*)]; }; struct arpt_replace { char name[32]; unsigned int valid_hooks; unsigned int num_entries; unsigned int size; unsigned int hook_entry[3]; unsigned int underflow[3]; unsigned int num_counters; struct xt_counters* counters; char entrytable[XT_TABLE_SIZE]; }; struct arpt_table_desc { const char* name; struct arpt_getinfo info; struct arpt_replace replace; }; static struct arpt_table_desc arpt_tables[] = { {.name = "filter"}, }; #define ARPT_BASE_CTL 96 #define ARPT_SO_SET_REPLACE (ARPT_BASE_CTL) #define ARPT_SO_GET_INFO (ARPT_BASE_CTL) #define ARPT_SO_GET_ENTRIES (ARPT_BASE_CTL + 1) static void checkpoint_iptables(struct ipt_table_desc* tables, int num_tables, int family, int level) { struct ipt_get_entries entries; socklen_t optlen; int fd, i; fd = socket(family, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: return; } fail("socket(%d, SOCK_STREAM, IPPROTO_TCP)", family); } for (i = 0; i < num_tables; i++) { struct ipt_table_desc* table = &tables[i]; strcpy(table->info.name, table->name); strcpy(table->replace.name, table->name); optlen = sizeof(table->info); if (getsockopt(fd, level, IPT_SO_GET_INFO, &table->info, &optlen)) { switch (errno) { case EPERM: case ENOENT: case ENOPROTOOPT: continue; } fail("getsockopt(IPT_SO_GET_INFO)"); } if (table->info.size > sizeof(table->replace.entrytable)) fail("table size is too large: %u", table->info.size); if (table->info.num_entries > XT_MAX_ENTRIES) fail("too many counters: %u", table->info.num_entries); memset(&entries, 0, sizeof(entries)); strcpy(entries.name, table->name); entries.size = table->info.size; optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size; if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen)) fail("getsockopt(IPT_SO_GET_ENTRIES)"); table->replace.valid_hooks = table->info.valid_hooks; table->replace.num_entries = table->info.num_entries; table->replace.size = table->info.size; memcpy(table->replace.hook_entry, table->info.hook_entry, sizeof(table->replace.hook_entry)); memcpy(table->replace.underflow, table->info.underflow, sizeof(table->replace.underflow)); memcpy(table->replace.entrytable, entries.entrytable, table->info.size); } close(fd); } static void reset_iptables(struct ipt_table_desc* tables, int num_tables, int family, int level) { struct xt_counters counters[XT_MAX_ENTRIES]; struct ipt_get_entries entries; struct ipt_getinfo info; socklen_t optlen; int fd, i; fd = socket(family, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: return; } fail("socket(%d, SOCK_STREAM, IPPROTO_TCP)", family); } for (i = 0; i < num_tables; i++) { struct ipt_table_desc* table = &tables[i]; if (table->info.valid_hooks == 0) continue; memset(&info, 0, sizeof(info)); strcpy(info.name, table->name); optlen = sizeof(info); if (getsockopt(fd, level, IPT_SO_GET_INFO, &info, &optlen)) fail("getsockopt(IPT_SO_GET_INFO)"); if (memcmp(&table->info, &info, sizeof(table->info)) == 0) { memset(&entries, 0, sizeof(entries)); strcpy(entries.name, table->name); entries.size = table->info.size; optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size; if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen)) fail("getsockopt(IPT_SO_GET_ENTRIES)"); if (memcmp(table->replace.entrytable, entries.entrytable, table->info.size) == 0) continue; } table->replace.num_counters = info.num_entries; table->replace.counters = counters; optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) + table->replace.size; if (setsockopt(fd, level, IPT_SO_SET_REPLACE, &table->replace, optlen)) fail("setsockopt(IPT_SO_SET_REPLACE)"); } close(fd); } static void checkpoint_arptables(void) { struct arpt_get_entries entries; socklen_t optlen; unsigned i; int fd; fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: return; } fail("socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)"); } for (i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) { struct arpt_table_desc* table = &arpt_tables[i]; strcpy(table->info.name, table->name); strcpy(table->replace.name, table->name); optlen = sizeof(table->info); if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &table->info, &optlen)) { switch (errno) { case EPERM: case ENOENT: case ENOPROTOOPT: continue; } fail("getsockopt(ARPT_SO_GET_INFO)"); } if (table->info.size > sizeof(table->replace.entrytable)) fail("table size is too large: %u", table->info.size); if (table->info.num_entries > XT_MAX_ENTRIES) fail("too many counters: %u", table->info.num_entries); memset(&entries, 0, sizeof(entries)); strcpy(entries.name, table->name); entries.size = table->info.size; optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size; if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen)) fail("getsockopt(ARPT_SO_GET_ENTRIES)"); table->replace.valid_hooks = table->info.valid_hooks; table->replace.num_entries = table->info.num_entries; table->replace.size = table->info.size; memcpy(table->replace.hook_entry, table->info.hook_entry, sizeof(table->replace.hook_entry)); memcpy(table->replace.underflow, table->info.underflow, sizeof(table->replace.underflow)); memcpy(table->replace.entrytable, entries.entrytable, table->info.size); } close(fd); } static void reset_arptables() { struct xt_counters counters[XT_MAX_ENTRIES]; struct arpt_get_entries entries; struct arpt_getinfo info; socklen_t optlen; unsigned i; int fd; fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: return; } fail("socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)"); } for (i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) { struct arpt_table_desc* table = &arpt_tables[i]; if (table->info.valid_hooks == 0) continue; memset(&info, 0, sizeof(info)); strcpy(info.name, table->name); optlen = sizeof(info); if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &info, &optlen)) fail("getsockopt(ARPT_SO_GET_INFO)"); if (memcmp(&table->info, &info, sizeof(table->info)) == 0) { memset(&entries, 0, sizeof(entries)); strcpy(entries.name, table->name); entries.size = table->info.size; optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size; if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen)) fail("getsockopt(ARPT_SO_GET_ENTRIES)"); if (memcmp(table->replace.entrytable, entries.entrytable, table->info.size) == 0) continue; } table->replace.num_counters = info.num_entries; table->replace.counters = counters; optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) + table->replace.size; if (setsockopt(fd, SOL_IP, ARPT_SO_SET_REPLACE, &table->replace, optlen)) fail("setsockopt(ARPT_SO_SET_REPLACE)"); } close(fd); } #include #include struct ebt_table_desc { const char* name; struct ebt_replace replace; char entrytable[XT_TABLE_SIZE]; }; static struct ebt_table_desc ebt_tables[] = { {.name = "filter"}, {.name = "nat"}, {.name = "broute"}, }; static void checkpoint_ebtables(void) { socklen_t optlen; unsigned i; int fd; fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: return; } fail("socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)"); } for (i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) { struct ebt_table_desc* table = &ebt_tables[i]; strcpy(table->replace.name, table->name); optlen = sizeof(table->replace); if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_INFO, &table->replace, &optlen)) { switch (errno) { case EPERM: case ENOENT: case ENOPROTOOPT: continue; } fail("getsockopt(EBT_SO_GET_INIT_INFO)"); } if (table->replace.entries_size > sizeof(table->entrytable)) fail("table size is too large: %u", table->replace.entries_size); table->replace.num_counters = 0; table->replace.entries = table->entrytable; optlen = sizeof(table->replace) + table->replace.entries_size; if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_ENTRIES, &table->replace, &optlen)) fail("getsockopt(EBT_SO_GET_INIT_ENTRIES)"); } close(fd); } static void reset_ebtables() { struct ebt_replace replace; char entrytable[XT_TABLE_SIZE]; socklen_t optlen; unsigned i, j, h; int fd; fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: return; } fail("socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)"); } for (i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) { struct ebt_table_desc* table = &ebt_tables[i]; if (table->replace.valid_hooks == 0) continue; memset(&replace, 0, sizeof(replace)); strcpy(replace.name, table->name); optlen = sizeof(replace); if (getsockopt(fd, SOL_IP, EBT_SO_GET_INFO, &replace, &optlen)) fail("getsockopt(EBT_SO_GET_INFO)"); replace.num_counters = 0; table->replace.entries = 0; for (h = 0; h < NF_BR_NUMHOOKS; h++) table->replace.hook_entry[h] = 0; if (memcmp(&table->replace, &replace, sizeof(table->replace)) == 0) { memset(&entrytable, 0, sizeof(entrytable)); replace.entries = entrytable; optlen = sizeof(replace) + replace.entries_size; if (getsockopt(fd, SOL_IP, EBT_SO_GET_ENTRIES, &replace, &optlen)) fail("getsockopt(EBT_SO_GET_ENTRIES)"); if (memcmp(table->entrytable, entrytable, replace.entries_size) == 0) continue; } for (j = 0, h = 0; h < NF_BR_NUMHOOKS; h++) { if (table->replace.valid_hooks & (1 << h)) { table->replace.hook_entry[h] = (struct ebt_entries*)table->entrytable + j; j++; } } table->replace.entries = table->entrytable; optlen = sizeof(table->replace) + table->replace.entries_size; if (setsockopt(fd, SOL_IP, EBT_SO_SET_ENTRIES, &table->replace, optlen)) fail("setsockopt(EBT_SO_SET_ENTRIES)"); } close(fd); } static void checkpoint_net_namespace(void) { checkpoint_ebtables(); checkpoint_arptables(); checkpoint_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]), AF_INET, SOL_IP); checkpoint_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]), AF_INET6, SOL_IPV6); } static void reset_net_namespace(void) { reset_ebtables(); reset_arptables(); reset_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]), AF_INET, SOL_IP); reset_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]), AF_INET6, SOL_IPV6); } 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) { 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); while (umount2(filename, MNT_DETACH) == 0) { } 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 execute_one(); extern unsigned long long procid; static void loop() { checkpoint_net_namespace(); char cgroupdir[64]; snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid); char cgroupdir_cpu[64]; snprintf(cgroupdir_cpu, sizeof(cgroupdir_cpu), "/syzcgroup/cpu/syz%llu", procid); char cgroupdir_net[64]; snprintf(cgroupdir_net, sizeof(cgroupdir_net), "/syzcgroup/net/syz%llu", procid); if (mkdir(cgroupdir, 0777)) { } if (mkdir(cgroupdir_cpu, 0777)) { } if (mkdir(cgroupdir_net, 0777)) { } int pid = getpid(); char procs_file[128]; snprintf(procs_file, sizeof(procs_file), "%s/cgroup.procs", cgroupdir); if (!write_file(procs_file, "%d", pid)) { } snprintf(procs_file, sizeof(procs_file), "%s/cgroup.procs", cgroupdir_cpu); if (!write_file(procs_file, "%d", pid)) { } snprintf(procs_file, sizeof(procs_file), "%s/cgroup.procs", cgroupdir_net); if (!write_file(procs_file, "%d", pid)) { } int iter; for (iter = 0;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) fail("failed to mkdir"); int pid = fork(); if (pid < 0) fail("clone failed"); if (pid == 0) { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); if (chdir(cwdbuf)) fail("failed to chdir"); if (symlink(cgroupdir, "./cgroup")) { } if (symlink(cgroupdir_cpu, "./cgroup.cpu")) { } if (symlink(cgroupdir_net, "./cgroup.net")) { } flush_tun(); execute_one(); int fd; for (fd = 3; fd < 30; fd++) close(fd); 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) continue; kill(-pid, SIGKILL); kill(pid, SIGKILL); while (waitpid(-1, &status, __WALL) != pid) { } break; } remove_dir(cwdbuf); reset_net_namespace(); } } 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 (__atomic_load_n(&running, __ATOMIC_RELAXED)) usleep((call == num_calls - 1) ? 10000 : 1000); break; } } } } uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0x0}; unsigned long long procid; void execute_call(int call) { long res; switch (call) { case 0: NONFAILING(memcpy((void*)0x20000000, "./file0", 8)); syscall(__NR_mkdirat, 0xffffff9c, 0x20000000, 0); break; case 1: NONFAILING(memcpy((void*)0x200001c0, "/selinux/enforce", 17)); res = syscall(__NR_openat, 0xffffffffffffff9c, 0x200001c0, 0x200000, 0); if (res != -1) r[0] = res; break; case 2: syscall(__NR_ioctl, r[0], 0x8008700b, 0x20000240); break; case 3: NONFAILING(memcpy((void*)0x20000280, "/dev/fuse", 10)); res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000280, 2, 0); if (res != -1) r[1] = res; break; case 4: NONFAILING(*(uint64_t*)0x200000c0 = 9); syscall(__NR_sched_setaffinity, 0, 7, 0x200000c0); break; case 5: NONFAILING(memcpy((void*)0x20000100, "/dev/rfkill", 12)); res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 0, 0); if (res != -1) r[2] = res; break; case 6: NONFAILING(*(uint32_t*)0x20000040 = 1); NONFAILING(*(uint32_t*)0x20000044 = 0x70); NONFAILING(*(uint8_t*)0x20000048 = 0); NONFAILING(*(uint8_t*)0x20000049 = 0); NONFAILING(*(uint8_t*)0x2000004a = 0); NONFAILING(*(uint8_t*)0x2000004b = 0); NONFAILING(*(uint32_t*)0x2000004c = 0); NONFAILING(*(uint64_t*)0x20000050 = 0x50d); NONFAILING(*(uint64_t*)0x20000058 = 0); NONFAILING(*(uint64_t*)0x20000060 = 0); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 0, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 1, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 2, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 3, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 4, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 5, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 6, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 7, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 8, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 9, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 10, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 11, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 12, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 13, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 14, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 15, 2)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 17, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 18, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 19, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 20, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 21, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 22, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 23, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 24, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 25, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 26, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 27, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 28, 1)); NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 29, 35)); NONFAILING(*(uint32_t*)0x20000070 = 0); NONFAILING(*(uint32_t*)0x20000074 = 0); NONFAILING(*(uint64_t*)0x20000078 = 0x20000000); NONFAILING(*(uint64_t*)0x20000080 = 0); NONFAILING(*(uint64_t*)0x20000088 = 0); NONFAILING(*(uint64_t*)0x20000090 = 0); NONFAILING(*(uint32_t*)0x20000098 = 0); NONFAILING(*(uint32_t*)0x2000009c = 0); NONFAILING(*(uint64_t*)0x200000a0 = 0); NONFAILING(*(uint32_t*)0x200000a8 = 0); NONFAILING(*(uint16_t*)0x200000ac = 0); NONFAILING(*(uint16_t*)0x200000ae = 0); syscall(__NR_perf_event_open, 0x20000040, 0, 0, -1, 0); break; case 7: syscall(__NR_ioctl, -1, 0x4c00, -1); break; case 8: syscall(__NR_fchown, -1, 0, 0); break; case 9: NONFAILING(memcpy((void*)0x208deff8, "./file0", 8)); NONFAILING(memcpy((void*)0x20000040, "./file0", 8)); NONFAILING(memcpy((void*)0x2015bffc, "nfs", 4)); syscall(__NR_mount, 0x208deff8, 0x20000040, 0x2015bffc, 0x7a00, 0x20000000); break; case 10: NONFAILING(*(uint32_t*)0x200004c0 = 0x80); res = syscall(__NR_getpeername, r[0], 0x20000400, 0x200004c0); if (res != -1) NONFAILING(r[3] = *(uint32_t*)0x20000404); break; case 11: NONFAILING(*(uint64_t*)0x200008c0 = 0x200003c0); NONFAILING(*(uint16_t*)0x200003c0 = 0x10); NONFAILING(*(uint16_t*)0x200003c2 = 0); NONFAILING(*(uint32_t*)0x200003c4 = 0); NONFAILING(*(uint32_t*)0x200003c8 = 0x2000000); NONFAILING(*(uint32_t*)0x200008c8 = 0xc); NONFAILING(*(uint64_t*)0x200008d0 = 0x20000580); NONFAILING(*(uint64_t*)0x20000580 = 0x20000500); NONFAILING(*(uint32_t*)0x20000500 = 0x4c); NONFAILING(*(uint16_t*)0x20000504 = 0x2e); NONFAILING(*(uint16_t*)0x20000506 = 8); NONFAILING(*(uint32_t*)0x20000508 = 0x70bd28); NONFAILING(*(uint32_t*)0x2000050c = 0x25dfdbfc); NONFAILING(*(uint8_t*)0x20000510 = 0); NONFAILING(*(uint32_t*)0x20000514 = r[3]); NONFAILING(*(uint16_t*)0x20000518 = 0); NONFAILING(*(uint16_t*)0x2000051a = 0xf); NONFAILING(*(uint16_t*)0x2000051c = -1); NONFAILING(*(uint16_t*)0x2000051e = -1); NONFAILING(*(uint16_t*)0x20000520 = -1); NONFAILING(*(uint16_t*)0x20000522 = 0xffe0); NONFAILING(*(uint16_t*)0x20000524 = 8); NONFAILING(*(uint16_t*)0x20000526 = 0xb); NONFAILING(*(uint32_t*)0x20000528 = 0x90); NONFAILING(*(uint16_t*)0x2000052c = 8); NONFAILING(*(uint16_t*)0x2000052e = 0xb); NONFAILING(*(uint32_t*)0x20000530 = 0x8000); NONFAILING(*(uint16_t*)0x20000534 = 8); NONFAILING(*(uint16_t*)0x20000536 = 0xb); NONFAILING(*(uint32_t*)0x20000538 = 1); NONFAILING(*(uint16_t*)0x2000053c = 8); NONFAILING(*(uint16_t*)0x2000053e = 0xb); NONFAILING(*(uint32_t*)0x20000540 = 0x881f); NONFAILING(*(uint16_t*)0x20000544 = 8); NONFAILING(*(uint16_t*)0x20000546 = 0xb); NONFAILING(*(uint32_t*)0x20000548 = 0x7ff); NONFAILING(*(uint64_t*)0x20000588 = 0x4c); NONFAILING(*(uint64_t*)0x200008d8 = 1); NONFAILING(*(uint64_t*)0x200008e0 = 0); NONFAILING(*(uint64_t*)0x200008e8 = 0); NONFAILING(*(uint32_t*)0x200008f0 = 0x8010); syscall(__NR_sendmsg, r[2], 0x200008c0, 4); break; case 12: NONFAILING(*(uint64_t*)0x20000700 = 0); NONFAILING(*(uint64_t*)0x20000708 = 0xfffffffffffffffc); NONFAILING(*(uint32_t*)0x20000710 = 4); NONFAILING(*(uint32_t*)0x20000714 = 0xaa); NONFAILING(*(uint32_t*)0x20000718 = 7); NONFAILING(*(uint64_t*)0x20000720 = 2); NONFAILING(*(uint64_t*)0x20000728 = 6); NONFAILING(*(uint64_t*)0x20000730 = 0); NONFAILING(*(uint64_t*)0x20000738 = 0); NONFAILING(*(uint64_t*)0x20000740 = 0); NONFAILING(*(uint32_t*)0x20000748 = 0); NONFAILING(*(uint32_t*)0x2000074c = 0); NONFAILING(*(uint32_t*)0x20000750 = 0); NONFAILING(*(uint32_t*)0x20000754 = 0); NONFAILING(*(uint64_t*)0x20000758 = 5); NONFAILING(*(uint64_t*)0x20000760 = 0xffff); NONFAILING(*(uint64_t*)0x20000768 = 0x3ff); NONFAILING(*(uint64_t*)0x20000770 = 0); NONFAILING(*(uint64_t*)0x20000778 = 0); NONFAILING(*(uint32_t*)0x20000780 = 0x2000); NONFAILING(*(uint32_t*)0x20000784 = 0); NONFAILING(*(uint32_t*)0x20000788 = 0); NONFAILING(*(uint32_t*)0x2000078c = 0); NONFAILING(*(uint64_t*)0x20000790 = 0x3aa); NONFAILING(*(uint64_t*)0x20000798 = 0x45ec); NONFAILING(*(uint64_t*)0x200007a0 = 3); NONFAILING(*(uint64_t*)0x200007a8 = 0); NONFAILING(*(uint64_t*)0x200007b0 = 0); NONFAILING(*(uint32_t*)0x200007b8 = 0x1000); NONFAILING(*(uint32_t*)0x200007bc = 0); NONFAILING(*(uint32_t*)0x200007c0 = 0); NONFAILING(*(uint32_t*)0x200007c4 = 0); NONFAILING(*(uint64_t*)0x200007c8 = 1); NONFAILING(*(uint64_t*)0x200007d0 = 0x7ff); NONFAILING(*(uint64_t*)0x200007d8 = 7); NONFAILING(*(uint64_t*)0x200007e0 = 0); NONFAILING(*(uint64_t*)0x200007e8 = 0); NONFAILING(*(uint32_t*)0x200007f0 = 0x80); NONFAILING(*(uint32_t*)0x200007f4 = 0); NONFAILING(*(uint32_t*)0x200007f8 = 0); NONFAILING(*(uint32_t*)0x200007fc = 0); NONFAILING(*(uint64_t*)0x20000800 = 0); NONFAILING(*(uint64_t*)0x20000808 = 0x800); NONFAILING(*(uint64_t*)0x20000810 = 0x20); NONFAILING(*(uint64_t*)0x20000818 = 0); NONFAILING(*(uint64_t*)0x20000820 = 0); NONFAILING(*(uint32_t*)0x20000828 = 0x800); NONFAILING(*(uint32_t*)0x2000082c = 0); NONFAILING(*(uint32_t*)0x20000830 = 0); NONFAILING(*(uint32_t*)0x20000834 = 0); NONFAILING(*(uint64_t*)0x20000838 = 0x101); NONFAILING(*(uint64_t*)0x20000840 = 0x65); NONFAILING(*(uint64_t*)0x20000848 = 3); NONFAILING(*(uint64_t*)0x20000850 = 0); NONFAILING(*(uint64_t*)0x20000858 = 0); NONFAILING(*(uint32_t*)0x20000860 = 0x2000); NONFAILING(*(uint32_t*)0x20000864 = 0); NONFAILING(*(uint32_t*)0x20000868 = 0); NONFAILING(*(uint32_t*)0x2000086c = 0); NONFAILING(*(uint64_t*)0x20000870 = 4); NONFAILING(*(uint64_t*)0x20000878 = 0xfff); NONFAILING(*(uint64_t*)0x20000880 = 0); NONFAILING(*(uint64_t*)0x20000888 = 0); NONFAILING(*(uint64_t*)0x20000890 = 0); NONFAILING(*(uint32_t*)0x20000898 = 0x2200); NONFAILING(*(uint32_t*)0x2000089c = 0); NONFAILING(*(uint32_t*)0x200008a0 = 0); NONFAILING(*(uint32_t*)0x200008a4 = 0); syscall(__NR_ioctl, r[0], 0xc020660b, 0x20000700); break; case 13: NONFAILING(*(uint64_t*)0x20000180 = 0x20000000); NONFAILING(*(uint16_t*)0x20000000 = 0x10); NONFAILING(*(uint16_t*)0x20000002 = 0); NONFAILING(*(uint32_t*)0x20000004 = 0); NONFAILING(*(uint32_t*)0x20000008 = 0); NONFAILING(*(uint32_t*)0x20000188 = 0xc); NONFAILING(*(uint64_t*)0x20000190 = 0x20000140); NONFAILING(*(uint64_t*)0x20000140 = 0x20000740); NONFAILING(*(uint64_t*)0x20000148 = 1); NONFAILING(*(uint64_t*)0x20000198 = 1); NONFAILING(*(uint64_t*)0x200001a0 = 0); NONFAILING(*(uint64_t*)0x200001a8 = 0); NONFAILING(*(uint32_t*)0x200001b0 = 0); syscall(__NR_sendmsg, -1, 0x20000180, 0); break; case 14: NONFAILING(memcpy((void*)0x20000340, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad" "\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd" "\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72" "\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93" "\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb" "\xf2\xf6\xe8\x80\xd3\x38\x2f\x00", 78)); syscall(__NR_fanotify_mark, r[2], 0x20, 1, r[0], 0x20000340); break; case 15: NONFAILING(memcpy((void*)0x200002c0, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad" "\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd" "\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72" "\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93" "\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb" "\xf2\xf6\xe8\x80\xd3\x38\x2f\x00", 78)); syscall(__NR_mkdir, 0x200002c0, 0); break; case 16: NONFAILING(memcpy((void*)0x20000200, "./file0", 8)); NONFAILING(memcpy((void*)0x20000300, "fuse", 5)); NONFAILING(memcpy((void*)0x20000640, "fd", 2)); NONFAILING(*(uint8_t*)0x20000642 = 0x3d); NONFAILING(sprintf((char*)0x20000643, "0x%016llx", (long long)r[1])); NONFAILING(*(uint8_t*)0x20000655 = 0x2c); NONFAILING(memcpy((void*)0x20000656, "rootmode", 8)); NONFAILING(*(uint8_t*)0x2000065e = 0x3d); NONFAILING(sprintf((char*)0x2000065f, "%023llo", (long long)0x4000)); NONFAILING(*(uint8_t*)0x20000676 = 0x2c); NONFAILING(memcpy((void*)0x20000677, "user_id", 7)); NONFAILING(*(uint8_t*)0x2000067e = 0x3d); NONFAILING(sprintf((char*)0x2000067f, "%020llu", (long long)0)); NONFAILING(*(uint8_t*)0x20000693 = 0x2c); NONFAILING(memcpy((void*)0x20000694, "group_id", 8)); NONFAILING(*(uint8_t*)0x2000069c = 0x3d); NONFAILING(sprintf((char*)0x2000069d, "%020llu", (long long)0)); NONFAILING(*(uint8_t*)0x200006b1 = 0x2c); NONFAILING(memcpy((void*)0x200006b2, "default_permissions", 19)); NONFAILING(*(uint8_t*)0x200006c5 = 0x2c); NONFAILING(*(uint8_t*)0x200006c6 = 0); syscall(__NR_mount, 0, 0x20000200, 0x20000300, 0, 0x20000640); break; case 17: syscall(__NR_read, r[1], 0x20001000, 0x1000); break; case 18: NONFAILING(*(uint32_t*)0x20000100 = 0x50); NONFAILING(*(uint32_t*)0x20000104 = 0); NONFAILING(*(uint64_t*)0x20000108 = 1); NONFAILING(*(uint32_t*)0x20000110 = 7); NONFAILING(*(uint32_t*)0x20000114 = 0x1b); NONFAILING(*(uint32_t*)0x20000118 = 0); NONFAILING(*(uint32_t*)0x2000011c = 0); NONFAILING(*(uint16_t*)0x20000120 = 0); NONFAILING(*(uint16_t*)0x20000122 = 0); NONFAILING(*(uint32_t*)0x20000124 = 0); NONFAILING(*(uint32_t*)0x20000128 = 0); NONFAILING(*(uint32_t*)0x2000012c = 0); NONFAILING(*(uint32_t*)0x20000130 = 0); NONFAILING(*(uint32_t*)0x20000134 = 0); NONFAILING(*(uint32_t*)0x20000138 = 0); NONFAILING(*(uint32_t*)0x2000013c = 0); NONFAILING(*(uint32_t*)0x20000140 = 0); NONFAILING(*(uint32_t*)0x20000144 = 0); NONFAILING(*(uint32_t*)0x20000148 = 0); NONFAILING(*(uint32_t*)0x2000014c = 0); syscall(__NR_write, r[1], 0x20000100, 0x50); break; case 19: NONFAILING(memcpy((void*)0x20000480, "./file0", 8)); syscall(__NR_stat, 0x20000480, 0x200005c0); break; case 20: syscall(__NR_ioctl, -1, 0x4b4e, 0xf); break; case 21: syscall(__NR_read, r[1], 0x20001000, 0x1000); break; case 22: NONFAILING(*(uint32_t*)0x20002000 = 0x90); NONFAILING(*(uint32_t*)0x20002004 = 0); NONFAILING(*(uint64_t*)0x20002008 = 2); NONFAILING(*(uint64_t*)0x20002010 = 0); NONFAILING(*(uint64_t*)0x20002018 = 0); NONFAILING(*(uint64_t*)0x20002020 = 0); NONFAILING(*(uint64_t*)0x20002028 = 0); NONFAILING(*(uint32_t*)0x20002030 = 0); NONFAILING(*(uint32_t*)0x20002034 = 0); NONFAILING(*(uint64_t*)0x20002038 = 0); NONFAILING(*(uint64_t*)0x20002040 = 0); NONFAILING(*(uint64_t*)0x20002048 = 0); NONFAILING(*(uint64_t*)0x20002050 = 0); NONFAILING(*(uint64_t*)0x20002058 = 0); NONFAILING(*(uint64_t*)0x20002060 = 0); NONFAILING(*(uint32_t*)0x20002068 = 0); NONFAILING(*(uint32_t*)0x2000206c = 0); NONFAILING(*(uint32_t*)0x20002070 = 0); NONFAILING(*(uint32_t*)0x20002074 = 0); NONFAILING(*(uint32_t*)0x20002078 = 0); NONFAILING(*(uint32_t*)0x2000207c = 0); NONFAILING(*(uint32_t*)0x20002080 = 0); NONFAILING(*(uint32_t*)0x20002084 = 0); NONFAILING(*(uint32_t*)0x20002088 = 0); NONFAILING(*(uint32_t*)0x2000208c = 0); syscall(__NR_write, r[1], 0x20002000, 0x90); break; } } void execute_one() { execute(23); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); char* cwd = get_current_dir_name(); for (procid = 0; procid < 8; procid++) { if (fork() == 0) { install_segv_handler(); for (;;) { if (chdir(cwd)) fail("failed to chdir"); use_temporary_dir(); do_sandbox_none(); } } } sleep(1000000); return 0; }