| // BUG: unable to handle kernel paging request in tpg_fill_plane_buffer |
| // https://syzkaller.appspot.com/bug?id=f620d34965777e9d309c58394ade94dbd3e3b0a8 |
| // status:open |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <arpa/inet.h> |
| #include <dirent.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <net/if_arp.h> |
| #include <netinet/in.h> |
| #include <pthread.h> |
| #include <sched.h> |
| #include <setjmp.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include <sys/prctl.h> |
| #include <sys/resource.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <sys/uio.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <linux/futex.h> |
| #include <linux/if.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_tun.h> |
| #include <linux/ip.h> |
| #include <linux/loop.h> |
| #include <linux/net.h> |
| #include <linux/tcp.h> |
| |
| unsigned long long procid; |
| |
| static __thread int skip_segv; |
| static __thread jmp_buf segv_env; |
| |
| static void segv_handler(int sig, siginfo_t* info, void* ctx) |
| { |
| uintptr_t addr = (uintptr_t)info->si_addr; |
| const uintptr_t prog_start = 1 << 20; |
| const uintptr_t prog_end = 100 << 20; |
| if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) && |
| (addr < prog_start || addr > prog_end)) { |
| _longjmp(segv_env, 1); |
| } |
| exit(sig); |
| } |
| |
| static void install_segv_handler(void) |
| { |
| struct sigaction sa; |
| memset(&sa, 0, sizeof(sa)); |
| sa.sa_handler = SIG_IGN; |
| syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); |
| syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); |
| memset(&sa, 0, sizeof(sa)); |
| sa.sa_sigaction = segv_handler; |
| sa.sa_flags = SA_NODEFER | SA_SIGINFO; |
| sigaction(SIGSEGV, &sa, NULL); |
| sigaction(SIGBUS, &sa, NULL); |
| } |
| |
| #define NONFAILING(...) \ |
| { \ |
| __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ |
| if (_setjmp(segv_env) == 0) { \ |
| __VA_ARGS__; \ |
| } \ |
| __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ |
| } |
| |
| static void sleep_ms(uint64_t ms) |
| { |
| usleep(ms * 1000); |
| } |
| |
| static uint64_t current_time_ms(void) |
| { |
| struct timespec ts; |
| if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
| exit(1); |
| return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; |
| } |
| |
| static void use_temporary_dir(void) |
| { |
| char tmpdir_template[] = "./syzkaller.XXXXXX"; |
| char* tmpdir = mkdtemp(tmpdir_template); |
| if (!tmpdir) |
| exit(1); |
| if (chmod(tmpdir, 0777)) |
| exit(1); |
| if (chdir(tmpdir)) |
| exit(1); |
| } |
| |
| static void thread_start(void* (*fn)(void*), void* arg) |
| { |
| pthread_t th; |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setstacksize(&attr, 128 << 10); |
| if (pthread_create(&th, &attr, fn, arg)) |
| exit(1); |
| pthread_attr_destroy(&attr); |
| } |
| |
| typedef struct { |
| int state; |
| } event_t; |
| |
| static void event_init(event_t* ev) |
| { |
| ev->state = 0; |
| } |
| |
| static void event_reset(event_t* ev) |
| { |
| ev->state = 0; |
| } |
| |
| static void event_set(event_t* ev) |
| { |
| if (ev->state) |
| exit(1); |
| __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG); |
| } |
| |
| static void event_wait(event_t* ev) |
| { |
| while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) |
| syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); |
| } |
| |
| static int event_isset(event_t* ev) |
| { |
| return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); |
| } |
| |
| static int event_timedwait(event_t* ev, uint64_t timeout) |
| { |
| uint64_t start = current_time_ms(); |
| uint64_t now = start; |
| for (;;) { |
| uint64_t remain = timeout - (now - start); |
| struct timespec ts; |
| ts.tv_sec = remain / 1000; |
| ts.tv_nsec = (remain % 1000) * 1000 * 1000; |
| syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); |
| if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED)) |
| return 1; |
| now = current_time_ms(); |
| if (now - start > timeout) |
| return 0; |
| } |
| } |
| |
| static void vsnprintf_check(char* str, size_t size, const char* format, |
| va_list args) |
| { |
| int rv; |
| rv = vsnprintf(str, size, format, args); |
| if (rv < 0) |
| exit(1); |
| if ((size_t)rv >= size) |
| exit(1); |
| } |
| |
| #define COMMAND_MAX_LEN 128 |
| #define PATH_PREFIX \ |
| "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin " |
| #define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1) |
| |
| static void execute_command(bool panic, const char* format, ...) |
| { |
| va_list args; |
| char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN]; |
| int rv; |
| va_start(args, format); |
| memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN); |
| vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args); |
| va_end(args); |
| rv = system(command); |
| if (rv) { |
| if (panic) |
| exit(1); |
| } |
| } |
| |
| static int tunfd = -1; |
| static int tun_frags_enabled; |
| #define SYZ_TUN_MAX_PACKET_SIZE 1000 |
| |
| #define TUN_IFACE "syz_tun" |
| |
| #define LOCAL_MAC "aa:aa:aa:aa:aa:aa" |
| #define REMOTE_MAC "aa:aa:aa:aa:aa:bb" |
| |
| #define LOCAL_IPV4 "172.20.20.170" |
| #define REMOTE_IPV4 "172.20.20.187" |
| |
| #define LOCAL_IPV6 "fe80::aa" |
| #define REMOTE_IPV6 "fe80::bb" |
| |
| #define IFF_NAPI 0x0010 |
| #define IFF_NAPI_FRAGS 0x0020 |
| |
| static void initialize_tun(void) |
| { |
| tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK); |
| if (tunfd == -1) { |
| printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n"); |
| printf("otherwise fuzzing or reproducing might not work as intended\n"); |
| return; |
| } |
| const int kTunFd = 240; |
| if (dup2(tunfd, kTunFd) < 0) |
| exit(1); |
| close(tunfd); |
| tunfd = kTunFd; |
| struct ifreq ifr; |
| memset(&ifr, 0, sizeof(ifr)); |
| strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ); |
| ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_NAPI | IFF_NAPI_FRAGS; |
| if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) { |
| ifr.ifr_flags = IFF_TAP | IFF_NO_PI; |
| if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) |
| exit(1); |
| } |
| if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0) |
| exit(1); |
| tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0; |
| execute_command(0, "sysctl -w net.ipv6.conf.%s.accept_dad=0", TUN_IFACE); |
| execute_command(0, "sysctl -w net.ipv6.conf.%s.router_solicitations=0", |
| TUN_IFACE); |
| execute_command(1, "ip link set dev %s address %s", TUN_IFACE, LOCAL_MAC); |
| execute_command(1, "ip addr add %s/24 dev %s", LOCAL_IPV4, TUN_IFACE); |
| execute_command(1, "ip neigh add %s lladdr %s dev %s nud permanent", |
| REMOTE_IPV4, REMOTE_MAC, TUN_IFACE); |
| execute_command(0, "ip -6 addr add %s/120 dev %s", LOCAL_IPV6, TUN_IFACE); |
| execute_command(0, "ip -6 neigh add %s lladdr %s dev %s nud permanent", |
| REMOTE_IPV6, REMOTE_MAC, TUN_IFACE); |
| execute_command(1, "ip link set dev %s up", TUN_IFACE); |
| } |
| |
| #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 void initialize_netdevices_init(void) |
| { |
| execute_command(0, "ip link set dev nr%d address bb:bb:bb:bb:bb:00:%02hx", |
| procid, procid); |
| execute_command(0, "ip -4 addr add 172.30.00.%d/24 dev nr%d", procid + 1, |
| procid); |
| execute_command(0, "ip -6 addr add fe88::00:%02hx/120 dev nr%d", procid + 1, |
| procid); |
| execute_command(0, "ip link set dev nr%d up", procid); |
| execute_command(0, "ip link set dev rose%d address bb:bb:bb:01:%02hx", procid, |
| procid); |
| execute_command(0, "ip -4 addr add 172.30.01.%d/24 dev rose%d", procid + 1, |
| procid); |
| execute_command(0, "ip -6 addr add fe88::01:%02hx/120 dev rose%d", procid + 1, |
| procid); |
| } |
| |
| 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_open_dev(long a0, long a1, long 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) - 1)); |
| buf[sizeof(buf) - 1] = 0; |
| while ((hash = strchr(buf, '#'))) { |
| *hash = '0' + (char)(a1 % 10); |
| a1 /= 10; |
| } |
| return open(buf, a2, 0); |
| } |
| } |
| |
| const int kInitNetNsFd = 239; |
| static long syz_init_net_socket(long domain, long type, long proto) |
| { |
| int netns = open("/proc/self/ns/net", O_RDONLY); |
| if (netns == -1) |
| return netns; |
| if (setns(kInitNetNsFd, 0)) |
| return -1; |
| int sock = syscall(__NR_socket, domain, type, proto); |
| int err = errno; |
| if (setns(netns, 0)) |
| exit(1); |
| close(netns); |
| errno = err; |
| return sock; |
| } |
| |
| struct fs_image_segment { |
| void* data; |
| uintptr_t size; |
| uintptr_t offset; |
| }; |
| |
| #define IMAGE_MAX_SEGMENTS 4096 |
| #define IMAGE_MAX_SIZE (129 << 20) |
| |
| #define SYZ_memfd_create 319 |
| |
| static long syz_mount_image(long fsarg, long dir, unsigned long size, |
| unsigned long nsegs, long segments, long flags, |
| long optsarg) |
| { |
| char loopname[64], fs[32], opts[256]; |
| int loopfd, err = 0, res = -1; |
| unsigned long i; |
| struct fs_image_segment* segs = (struct fs_image_segment*)segments; |
| if (nsegs > IMAGE_MAX_SEGMENTS) |
| nsegs = IMAGE_MAX_SEGMENTS; |
| for (i = 0; i < nsegs; i++) { |
| if (segs[i].size > IMAGE_MAX_SIZE) |
| segs[i].size = IMAGE_MAX_SIZE; |
| segs[i].offset %= IMAGE_MAX_SIZE; |
| if (segs[i].offset > IMAGE_MAX_SIZE - segs[i].size) |
| segs[i].offset = IMAGE_MAX_SIZE - segs[i].size; |
| if (size < segs[i].offset + segs[i].offset) |
| size = segs[i].offset + segs[i].offset; |
| } |
| if (size > IMAGE_MAX_SIZE) |
| size = IMAGE_MAX_SIZE; |
| int memfd = syscall(SYZ_memfd_create, "syz_mount_image", 0); |
| if (memfd == -1) { |
| err = errno; |
| goto error; |
| } |
| if (ftruncate(memfd, size)) { |
| err = errno; |
| goto error_close_memfd; |
| } |
| for (i = 0; i < nsegs; i++) { |
| if (pwrite(memfd, segs[i].data, segs[i].size, segs[i].offset) < 0) { |
| } |
| } |
| snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); |
| loopfd = open(loopname, O_RDWR); |
| if (loopfd == -1) { |
| err = errno; |
| goto error_close_memfd; |
| } |
| if (ioctl(loopfd, LOOP_SET_FD, memfd)) { |
| if (errno != EBUSY) { |
| err = errno; |
| goto error_close_loop; |
| } |
| ioctl(loopfd, LOOP_CLR_FD, 0); |
| usleep(1000); |
| if (ioctl(loopfd, LOOP_SET_FD, memfd)) { |
| err = errno; |
| goto error_close_loop; |
| } |
| } |
| mkdir((char*)dir, 0777); |
| memset(fs, 0, sizeof(fs)); |
| NONFAILING(strncpy(fs, (char*)fsarg, sizeof(fs) - 1)); |
| memset(opts, 0, sizeof(opts)); |
| NONFAILING(strncpy(opts, (char*)optsarg, sizeof(opts) - 32)); |
| if (strcmp(fs, "iso9660") == 0) { |
| flags |= MS_RDONLY; |
| } else if (strncmp(fs, "ext", 3) == 0) { |
| if (strstr(opts, "errors=panic") || strstr(opts, "errors=remount-ro") == 0) |
| strcat(opts, ",errors=continue"); |
| } else if (strcmp(fs, "xfs") == 0) { |
| strcat(opts, ",nouuid"); |
| } |
| if (mount(loopname, (char*)dir, fs, flags, opts)) { |
| err = errno; |
| goto error_clear_loop; |
| } |
| res = 0; |
| error_clear_loop: |
| ioctl(loopfd, LOOP_CLR_FD, 0); |
| error_close_loop: |
| close(loopfd); |
| error_close_memfd: |
| close(memfd); |
| error: |
| errno = err; |
| return res; |
| } |
| |
| 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; |
| } |
| |
| #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; |
| } |
| exit(1); |
| } |
| 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; |
| } |
| exit(1); |
| } |
| if (table->info.size > sizeof(table->replace.entrytable)) |
| exit(1); |
| if (table->info.num_entries > XT_MAX_ENTRIES) |
| exit(1); |
| 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)) |
| exit(1); |
| 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; |
| } |
| exit(1); |
| } |
| 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)) |
| exit(1); |
| 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)) |
| exit(1); |
| 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)) |
| exit(1); |
| } |
| 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; |
| } |
| exit(1); |
| } |
| 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; |
| } |
| exit(1); |
| } |
| if (table->info.size > sizeof(table->replace.entrytable)) |
| exit(1); |
| if (table->info.num_entries > XT_MAX_ENTRIES) |
| exit(1); |
| 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)) |
| exit(1); |
| 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; |
| } |
| exit(1); |
| } |
| 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)) |
| exit(1); |
| 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)) |
| exit(1); |
| if (memcmp(table->replace.entrytable, entries.entrytable, |
| table->info.size) == 0) |
| continue; |
| } else { |
| } |
| 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)) |
| exit(1); |
| } |
| close(fd); |
| } |
| |
| #define NF_BR_NUMHOOKS 6 |
| #define EBT_TABLE_MAXNAMELEN 32 |
| #define EBT_CHAIN_MAXNAMELEN 32 |
| #define EBT_BASE_CTL 128 |
| #define EBT_SO_SET_ENTRIES (EBT_BASE_CTL) |
| #define EBT_SO_GET_INFO (EBT_BASE_CTL) |
| #define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO + 1) |
| #define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES + 1) |
| #define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO + 1) |
| |
| struct ebt_replace { |
| char name[EBT_TABLE_MAXNAMELEN]; |
| unsigned int valid_hooks; |
| unsigned int nentries; |
| unsigned int entries_size; |
| struct ebt_entries* hook_entry[NF_BR_NUMHOOKS]; |
| unsigned int num_counters; |
| struct ebt_counter* counters; |
| char* entries; |
| }; |
| |
| struct ebt_entries { |
| unsigned int distinguisher; |
| char name[EBT_CHAIN_MAXNAMELEN]; |
| unsigned int counter_offset; |
| int policy; |
| unsigned int nentries; |
| char data[0] __attribute__((aligned(__alignof__(struct ebt_replace)))); |
| }; |
| |
| 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; |
| } |
| exit(1); |
| } |
| 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; |
| } |
| exit(1); |
| } |
| if (table->replace.entries_size > sizeof(table->entrytable)) |
| exit(1); |
| 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)) |
| exit(1); |
| } |
| 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; |
| } |
| exit(1); |
| } |
| 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)) |
| exit(1); |
| 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)) |
| exit(1); |
| 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)) |
| exit(1); |
| } |
| 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 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 (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0)) { |
| } |
| if (!write_file("/proc/sys/fs/binfmt_misc/register", |
| ":syz0:M:0:\x01::./file0:")) { |
| } |
| if (!write_file("/proc/sys/fs/binfmt_misc/register", |
| ":syz1:M:1:\x02::./file0:POC")) { |
| } |
| } |
| |
| static void setup_common() |
| { |
| if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) { |
| } |
| setup_cgroups(); |
| setup_binfmt_misc(); |
| } |
| |
| static void loop(); |
| |
| static void sandbox_common() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| setsid(); |
| int netns = open("/proc/self/ns/net", O_RDONLY); |
| if (netns == -1) |
| exit(1); |
| if (dup2(netns, kInitNetNsFd) < 0) |
| exit(1); |
| close(netns); |
| struct rlimit rlim; |
| rlim.rlim_cur = rlim.rlim_max = 200 << 20; |
| setrlimit(RLIMIT_AS, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 32 << 20; |
| setrlimit(RLIMIT_MEMLOCK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 136 << 20; |
| setrlimit(RLIMIT_FSIZE, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 1 << 20; |
| setrlimit(RLIMIT_STACK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 0; |
| setrlimit(RLIMIT_CORE, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 256; |
| setrlimit(RLIMIT_NOFILE, &rlim); |
| if (unshare(CLONE_NEWNS)) { |
| } |
| if (unshare(CLONE_NEWIPC)) { |
| } |
| if (unshare(0x02000000)) { |
| } |
| if (unshare(CLONE_NEWUTS)) { |
| } |
| if (unshare(CLONE_SYSVSEM)) { |
| } |
| } |
| |
| int wait_for_loop(int pid) |
| { |
| if (pid < 0) |
| exit(1); |
| int status = 0; |
| while (waitpid(-1, &status, __WALL) != pid) { |
| } |
| return WEXITSTATUS(status); |
| } |
| |
| static int do_sandbox_none(void) |
| { |
| if (unshare(CLONE_NEWPID)) { |
| } |
| int pid = fork(); |
| if (pid != 0) |
| return wait_for_loop(pid); |
| setup_common(); |
| sandbox_common(); |
| initialize_netdevices_init(); |
| if (unshare(CLONE_NEWNET)) { |
| } |
| initialize_tun(); |
| initialize_netdevices(); |
| loop(); |
| exit(1); |
| } |
| |
| #define FS_IOC_SETFLAGS _IOW('f', 2, long) |
| static void remove_dir(const char* dir) |
| { |
| DIR* dp; |
| struct dirent* ep; |
| int iter = 0; |
| retry: |
| while (umount2(dir, MNT_DETACH) == 0) { |
| } |
| dp = opendir(dir); |
| if (dp == NULL) { |
| if (errno == EMFILE) { |
| exit(1); |
| } |
| exit(1); |
| } |
| while ((ep = readdir(dp))) { |
| if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) |
| continue; |
| char filename[FILENAME_MAX]; |
| snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); |
| while (umount2(filename, MNT_DETACH) == 0) { |
| } |
| struct stat st; |
| if (lstat(filename, &st)) |
| exit(1); |
| if (S_ISDIR(st.st_mode)) { |
| remove_dir(filename); |
| continue; |
| } |
| int i; |
| for (i = 0;; i++) { |
| if (unlink(filename) == 0) |
| break; |
| if (errno == EPERM) { |
| int fd = open(filename, O_RDONLY); |
| if (fd != -1) { |
| long flags = 0; |
| if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) |
| close(fd); |
| continue; |
| } |
| } |
| if (errno == EROFS) { |
| break; |
| } |
| if (errno != EBUSY || i > 100) |
| exit(1); |
| if (umount2(filename, MNT_DETACH)) |
| exit(1); |
| } |
| } |
| closedir(dp); |
| int i; |
| for (i = 0;; i++) { |
| if (rmdir(dir) == 0) |
| break; |
| if (i < 100) { |
| if (errno == EPERM) { |
| int fd = open(dir, O_RDONLY); |
| if (fd != -1) { |
| long flags = 0; |
| if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) |
| close(fd); |
| continue; |
| } |
| } |
| if (errno == EROFS) { |
| break; |
| } |
| if (errno == EBUSY) { |
| if (umount2(dir, MNT_DETACH)) |
| exit(1); |
| continue; |
| } |
| if (errno == ENOTEMPTY) { |
| if (iter < 100) { |
| iter++; |
| goto retry; |
| } |
| } |
| } |
| exit(1); |
| } |
| } |
| |
| static void kill_and_wait(int pid, int* status) |
| { |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| int i; |
| for (i = 0; i < 100; i++) { |
| if (waitpid(-1, status, WNOHANG | __WALL) == pid) |
| return; |
| usleep(1000); |
| } |
| DIR* dir = opendir("/sys/fs/fuse/connections"); |
| if (dir) { |
| for (;;) { |
| struct dirent* ent = readdir(dir); |
| if (!ent) |
| break; |
| if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) |
| continue; |
| char abort[300]; |
| snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", |
| ent->d_name); |
| int fd = open(abort, O_WRONLY); |
| if (fd == -1) { |
| continue; |
| } |
| if (write(fd, abort, 1) < 0) { |
| } |
| close(fd); |
| } |
| closedir(dir); |
| } else { |
| } |
| while (waitpid(-1, status, __WALL) != pid) { |
| } |
| } |
| |
| #define SYZ_HAVE_SETUP_LOOP 1 |
| static void setup_loop() |
| { |
| int pid = getpid(); |
| char cgroupdir[64]; |
| char file[128]; |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid); |
| if (mkdir(cgroupdir, 0777)) { |
| } |
| snprintf(file, sizeof(file), "%s/pids.max", cgroupdir); |
| if (!write_file(file, "32")) { |
| } |
| snprintf(file, sizeof(file), "%s/memory.low", cgroupdir); |
| if (!write_file(file, "%d", 298 << 20)) { |
| } |
| snprintf(file, sizeof(file), "%s/memory.high", cgroupdir); |
| if (!write_file(file, "%d", 299 << 20)) { |
| } |
| snprintf(file, sizeof(file), "%s/memory.max", cgroupdir); |
| if (!write_file(file, "%d", 300 << 20)) { |
| } |
| snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir); |
| if (!write_file(file, "%d", pid)) { |
| } |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid); |
| if (mkdir(cgroupdir, 0777)) { |
| } |
| snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir); |
| if (!write_file(file, "%d", pid)) { |
| } |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid); |
| if (mkdir(cgroupdir, 0777)) { |
| } |
| snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir); |
| if (!write_file(file, "%d", pid)) { |
| } |
| checkpoint_net_namespace(); |
| } |
| |
| #define SYZ_HAVE_RESET_LOOP 1 |
| static void reset_loop() |
| { |
| char buf[64]; |
| snprintf(buf, sizeof(buf), "/dev/loop%llu", procid); |
| int loopfd = open(buf, O_RDWR); |
| if (loopfd != -1) { |
| ioctl(loopfd, LOOP_CLR_FD, 0); |
| close(loopfd); |
| } |
| reset_net_namespace(); |
| } |
| |
| #define SYZ_HAVE_SETUP_TEST 1 |
| static void setup_test() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| char cgroupdir[64]; |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid); |
| if (symlink(cgroupdir, "./cgroup")) { |
| } |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid); |
| if (symlink(cgroupdir, "./cgroup.cpu")) { |
| } |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid); |
| if (symlink(cgroupdir, "./cgroup.net")) { |
| } |
| if (!write_file("/proc/self/oom_score_adj", "1000")) { |
| } |
| flush_tun(); |
| } |
| |
| #define SYZ_HAVE_RESET_TEST 1 |
| static void reset_test() |
| { |
| int fd; |
| for (fd = 3; fd < 30; fd++) |
| close(fd); |
| } |
| |
| struct thread_t { |
| int created, call; |
| event_t ready, done; |
| }; |
| |
| static struct thread_t threads[16]; |
| static void execute_call(int call); |
| static int running; |
| |
| static void* thr(void* arg) |
| { |
| struct thread_t* th = (struct thread_t*)arg; |
| for (;;) { |
| event_wait(&th->ready); |
| event_reset(&th->ready); |
| execute_call(th->call); |
| __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); |
| event_set(&th->done); |
| } |
| return 0; |
| } |
| |
| static void execute_one(void) |
| { |
| int i, call, thread; |
| int collide = 0; |
| again: |
| for (call = 0; call < 60; call++) { |
| for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); |
| thread++) { |
| struct thread_t* th = &threads[thread]; |
| if (!th->created) { |
| th->created = 1; |
| event_init(&th->ready); |
| event_init(&th->done); |
| event_set(&th->done); |
| thread_start(thr, th); |
| } |
| if (!event_isset(&th->done)) |
| continue; |
| event_reset(&th->done); |
| th->call = call; |
| __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); |
| event_set(&th->ready); |
| if (collide && (call % 2) == 0) |
| break; |
| event_timedwait(&th->done, 45); |
| break; |
| } |
| } |
| for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) |
| sleep_ms(1); |
| if (!collide) { |
| collide = 1; |
| goto again; |
| } |
| } |
| |
| static void execute_one(void); |
| |
| #define WAIT_FLAGS __WALL |
| |
| static void loop(void) |
| { |
| setup_loop(); |
| int iter; |
| for (iter = 0;; iter++) { |
| char cwdbuf[32]; |
| sprintf(cwdbuf, "./%d", iter); |
| if (mkdir(cwdbuf, 0777)) |
| exit(1); |
| reset_loop(); |
| int pid = fork(); |
| if (pid < 0) |
| exit(1); |
| if (pid == 0) { |
| if (chdir(cwdbuf)) |
| exit(1); |
| setup_test(); |
| execute_one(); |
| reset_test(); |
| exit(0); |
| } |
| int status = 0; |
| uint64_t start = current_time_ms(); |
| for (;;) { |
| if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) |
| break; |
| sleep_ms(1); |
| if (current_time_ms() - start < 5 * 1000) |
| continue; |
| kill_and_wait(pid, &status); |
| break; |
| } |
| remove_dir(cwdbuf); |
| } |
| } |
| |
| uint64_t r[15] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, |
| 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, |
| 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, |
| 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, |
| 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; |
| |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| NONFAILING(memcpy((void*)0x20000100, "/dev/video#\x00", 12)); |
| res = syz_open_dev(0x20000100, 3, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| NONFAILING(*(uint32_t*)0x20000040 = 9); |
| NONFAILING(*(uint32_t*)0x20000044 = 0); |
| NONFAILING(*(uint32_t*)0x20000048 = 0); |
| NONFAILING(*(uint32_t*)0x2000004c = 0); |
| NONFAILING(*(uint32_t*)0x20000050 = 0); |
| NONFAILING(*(uint32_t*)0x20000054 = 0x7c); |
| NONFAILING(*(uint32_t*)0x20000058 = 0); |
| NONFAILING(*(uint32_t*)0x2000005c = 0); |
| NONFAILING(*(uint32_t*)0x20000060 = 0); |
| NONFAILING(*(uint32_t*)0x20000064 = 0); |
| NONFAILING(*(uint32_t*)0x20000068 = 0); |
| NONFAILING(*(uint32_t*)0x2000006c = 0); |
| NONFAILING(*(uint32_t*)0x20000070 = 0); |
| NONFAILING(*(uint32_t*)0x20000074 = 0); |
| NONFAILING(*(uint32_t*)0x20000078 = 0); |
| NONFAILING(*(uint32_t*)0x2000007c = 0); |
| syscall(__NR_ioctl, r[0], 0xc040565f, 0x20000040); |
| break; |
| case 2: |
| syscall(__NR_read, r[0], 0x20000140, 0xb2); |
| break; |
| case 3: |
| res = syz_open_dev(0, 3, 0); |
| if (res != -1) |
| r[1] = res; |
| break; |
| case 4: |
| syscall(__NR_ioctl, 0xffffff9c, 0x540f, 0); |
| break; |
| case 5: |
| NONFAILING(*(uint32_t*)0x20000040 = 9); |
| NONFAILING(*(uint32_t*)0x20000044 = 0x100); |
| NONFAILING(*(uint32_t*)0x20000048 = 1); |
| NONFAILING(*(uint32_t*)0x2000004c = 0); |
| NONFAILING(*(uint32_t*)0x20000050 = 0xc0f); |
| NONFAILING(*(uint32_t*)0x20000054 = 0x7c); |
| NONFAILING(*(uint32_t*)0x20000058 = 0); |
| NONFAILING(*(uint32_t*)0x2000005c = 0); |
| NONFAILING(*(uint32_t*)0x20000060 = 0); |
| NONFAILING(*(uint32_t*)0x20000064 = 0); |
| NONFAILING(*(uint32_t*)0x20000068 = 0); |
| NONFAILING(*(uint32_t*)0x2000006c = 0); |
| NONFAILING(*(uint32_t*)0x20000070 = 0); |
| NONFAILING(*(uint32_t*)0x20000074 = 0); |
| NONFAILING(*(uint32_t*)0x20000078 = 0); |
| NONFAILING(*(uint32_t*)0x2000007c = 0); |
| syscall(__NR_ioctl, r[1], 0xc040565f, 0x20000040); |
| break; |
| case 6: |
| NONFAILING(memcpy((void*)0x20000100, "/dev/video#\x00", 12)); |
| res = syz_open_dev(0x20000100, 3, 0); |
| if (res != -1) |
| r[2] = res; |
| break; |
| case 7: |
| NONFAILING(*(uint32_t*)0x20000040 = 9); |
| NONFAILING(*(uint32_t*)0x20000044 = 0); |
| NONFAILING(*(uint32_t*)0x20000048 = 0); |
| NONFAILING(*(uint32_t*)0x2000004c = 0); |
| NONFAILING(*(uint32_t*)0x20000050 = 0xc0f); |
| NONFAILING(*(uint32_t*)0x20000054 = 0x7c); |
| NONFAILING(*(uint32_t*)0x20000058 = 0xffffffe7); |
| NONFAILING(*(uint32_t*)0x2000005c = 0); |
| NONFAILING(*(uint32_t*)0x20000060 = 0); |
| NONFAILING(*(uint32_t*)0x20000064 = 0); |
| NONFAILING(*(uint32_t*)0x20000068 = 0); |
| NONFAILING(*(uint32_t*)0x2000006c = 0); |
| NONFAILING(*(uint32_t*)0x20000070 = 0); |
| NONFAILING(*(uint32_t*)0x20000074 = 0); |
| NONFAILING(*(uint32_t*)0x20000078 = 0); |
| NONFAILING(*(uint32_t*)0x2000007c = 0); |
| syscall(__NR_ioctl, r[2], 0xc040565f, 0x20000040); |
| break; |
| case 8: |
| res = syz_open_dev(0, 3, 0); |
| if (res != -1) |
| r[3] = res; |
| break; |
| case 9: |
| syscall(__NR_ioctl, r[3], 0x80085617, 0x20000000); |
| break; |
| case 10: |
| NONFAILING(*(uint32_t*)0x20000080 = 2); |
| syscall(__NR_ioctl, r[3], 0xc0045627, 0x20000080); |
| break; |
| case 11: |
| NONFAILING(*(uint32_t*)0x20000040 = 0); |
| NONFAILING(*(uint32_t*)0x20000044 = 9); |
| NONFAILING(*(uint32_t*)0x20000048 = 0); |
| NONFAILING(memcpy( |
| (void*)0x2000004c, |
| "\xf9\x4b\x14\xc1\x5c\x01\x4c\x3d\x03\x4e\x73\x65\x72\xcb\xaa\x0c\xf7" |
| "\x25\x78\x7d\xdd\xa3\xf1\xdc\x64\xdf\x4b\x92\xdc\x61\xba\x2f", |
| 32)); |
| NONFAILING(*(uint32_t*)0x2000006c = 0); |
| NONFAILING(*(uint32_t*)0x20000070 = 0); |
| NONFAILING(*(uint32_t*)0x20000074 = 0); |
| NONFAILING(*(uint32_t*)0x20000078 = 0); |
| NONFAILING(*(uint32_t*)0x2000007c = 0); |
| syscall(__NR_ioctl, r[3], 0xc0405602, 0x20000040); |
| break; |
| case 12: |
| NONFAILING(*(uint64_t*)0x20000000 = htobe64(0)); |
| NONFAILING(*(uint64_t*)0x20000008 = htobe64(1)); |
| NONFAILING(*(uint32_t*)0x20000010 = 2); |
| NONFAILING(*(uint8_t*)0x20000014 = 0); |
| NONFAILING(*(uint8_t*)0x20000015 = 3); |
| NONFAILING(*(uint16_t*)0x20000016 = 0); |
| NONFAILING(*(uint16_t*)0x20000018 = 0xfffd); |
| NONFAILING(*(uint16_t*)0x2000001a = 4); |
| NONFAILING(*(uint32_t*)0x2000001c = 0); |
| syscall(__NR_getsockopt, -1, 0x29, 0x20, 0x20000000, 0); |
| break; |
| case 13: |
| NONFAILING(*(uint32_t*)0x200000c0 = 0); |
| NONFAILING(memcpy( |
| (void*)0x200000c4, |
| "\xae\xdc\x14\x19\x3b\x51\x9d\x44\xd6\xa1\xd0\x5c\xc0\xfb\x13\x4b\x54" |
| "\x23\xdb\xe0\xae\xe8\xef\x60\x13\x0b\x87\x1a\xcd\xfb\x46\x91", |
| 32)); |
| NONFAILING(*(uint32_t*)0x200000e4 = 8); |
| NONFAILING(*(uint64_t*)0x200000e8 = 0x400); |
| NONFAILING(*(uint64_t*)0x200000f0 = 5); |
| syscall(__NR_ioctl, -1, 0x4038564f, 0x200000c0); |
| break; |
| case 14: |
| res = syscall(__NR_socket, 0x1e, 0x400000000000004, 0); |
| if (res != -1) |
| r[4] = res; |
| break; |
| case 15: |
| NONFAILING(*(uint64_t*)0x200002c0 = 0); |
| NONFAILING(*(uint64_t*)0x200002c8 = 0x1c9c380); |
| syscall(__NR_recvmmsg, r[4], 0, 0, 0, 0x200002c0); |
| break; |
| case 16: |
| NONFAILING(*(uint32_t*)0x20000340 = 0xfffffff); |
| NONFAILING(*(uint32_t*)0x20000344 = 2); |
| NONFAILING(*(uint32_t*)0x20000348 = 9); |
| NONFAILING(*(uint32_t*)0x2000034c = 0); |
| NONFAILING(*(uint32_t*)0x20000350 = 0); |
| NONFAILING(*(uint64_t*)0x20000358 = 0x20000300); |
| NONFAILING(*(uint32_t*)0x20000300 = 0x990a6a); |
| NONFAILING(*(uint32_t*)0x20000304 = 0xb5); |
| NONFAILING(*(uint32_t*)0x20000308 = 0); |
| NONFAILING(*(uint32_t*)0x2000030c = 5); |
| syscall(__NR_ioctl, -1, 0xc0205649, 0x20000340); |
| break; |
| case 17: |
| syscall(__NR_ioctl, -1, 0xc0305602, 0); |
| break; |
| case 18: |
| NONFAILING(memcpy((void*)0x20000300, "/dev/kvm\x00", 9)); |
| syscall(__NR_openat, 0xffffffffffffff9c, 0x20000300, 0, 0); |
| break; |
| case 19: |
| NONFAILING(memcpy((void*)0x200000c0, "/dev/bus/usb/00#/00#\x00", 21)); |
| res = syz_open_dev(0x200000c0, 0x40000ffffff, 1); |
| if (res != -1) |
| r[5] = res; |
| break; |
| case 20: |
| NONFAILING(*(uint32_t*)0x20000040 = 2); |
| NONFAILING(*(uint32_t*)0x20000044 = 0x6a0ffff); |
| NONFAILING(*(uint32_t*)0x20000048 = 0xa1); |
| NONFAILING(*(uint32_t*)0x2000004c = 0); |
| NONFAILING(*(uint32_t*)0x20000050 = 0x730005); |
| NONFAILING(*(uint64_t*)0x20000058 = 0x7ff0bdbe); |
| syscall(__NR_ioctl, r[5], 0x8038550a, 0x20000040); |
| break; |
| case 21: |
| syscall(__NR_ioctl, -1, 6, 0x20000180); |
| break; |
| case 22: |
| syz_init_net_socket(3, 5, 0); |
| break; |
| case 23: |
| NONFAILING(*(uint64_t*)0x20000180 = 0x20000080); |
| NONFAILING(*(uint32_t*)0x20000188 = 0x80); |
| NONFAILING(*(uint64_t*)0x20000190 = 0); |
| NONFAILING(*(uint64_t*)0x20000198 = 0); |
| NONFAILING(*(uint64_t*)0x200001a0 = 0); |
| NONFAILING(*(uint64_t*)0x200001a8 = 0); |
| NONFAILING(*(uint32_t*)0x200001b0 = 0); |
| NONFAILING(*(uint32_t*)0x200001b8 = 0); |
| syscall(__NR_recvmmsg, -1, 0x20000180, 1, 0, 0); |
| break; |
| case 24: |
| syscall(__NR_sendto, -1, 0x20000300, 0, 0, 0, 0); |
| break; |
| case 25: |
| NONFAILING(*(uint32_t*)0x20000200 = 0); |
| syscall(__NR_getsockopt, -1, 0x84, 0x7c, 0, 0x20000200); |
| break; |
| case 26: |
| NONFAILING(*(uint32_t*)0x20000340 = 0xfffffff); |
| NONFAILING(*(uint32_t*)0x20000344 = 2); |
| NONFAILING(*(uint32_t*)0x20000348 = 9); |
| NONFAILING(*(uint32_t*)0x2000034c = 0); |
| NONFAILING(*(uint32_t*)0x20000350 = 0); |
| NONFAILING(*(uint64_t*)0x20000358 = 0); |
| syscall(__NR_ioctl, -1, 0xc0205649, 0x20000340); |
| break; |
| case 27: |
| syscall(__NR_setsockopt, -1, 0x84, 0x79, 0, 0); |
| break; |
| case 28: |
| syscall(__NR_openat, 0xffffffffffffff9c, 0, 2, 0); |
| break; |
| case 29: |
| NONFAILING(memcpy((void*)0x20000300, "/dev/kvm\x00", 9)); |
| syscall(__NR_openat, 0xffffffffffffff9c, 0x20000300, 0, 0); |
| break; |
| case 30: |
| res = syz_open_dev(0, 0x40000ffffff, 1); |
| if (res != -1) |
| r[6] = res; |
| break; |
| case 31: |
| syscall(__NR_ioctl, r[6], 0x8038550a, 0); |
| break; |
| case 32: |
| syscall(__NR_ioctl, -1, 0xae01, 0); |
| break; |
| case 33: |
| res = syz_open_dev(0, 0x40000ffffff, 1); |
| if (res != -1) |
| r[7] = res; |
| break; |
| case 34: |
| syscall(__NR_ioctl, r[7], 0x8038550a, 0); |
| break; |
| case 35: |
| res = syscall(__NR_openat, 0xffffffffffffff9c, 0, 0x80040, 0); |
| if (res != -1) |
| r[8] = res; |
| break; |
| case 36: |
| NONFAILING(memcpy((void*)0x20008cc0, "./file0\x00", 8)); |
| NONFAILING(*(uint32_t*)0x20008d00 = 8); |
| NONFAILING(*(uint32_t*)0x20008d04 = 0); |
| syscall(__NR_name_to_handle_at, r[8], 0x20008cc0, 0x20008d00, 0, 0x400); |
| break; |
| case 37: |
| NONFAILING(*(uint32_t*)0x20000000 = 0); |
| res = syscall(__NR_accept, -1, 0, 0x20000000); |
| if (res != -1) |
| r[9] = res; |
| break; |
| case 38: |
| NONFAILING(memcpy((void*)0x20008e40, "./file0\x00", 8)); |
| NONFAILING(memcpy((void*)0x20008ec0, "./file0\x00", 8)); |
| syscall(__NR_lsetxattr, 0x20008e40, 0, 0x20008ec0, 8, 2); |
| break; |
| case 39: |
| NONFAILING(*(uint32_t*)0x20000200 = 0); |
| res = syscall(__NR_accept, r[9], 0, 0x20000200); |
| if (res != -1) |
| r[10] = res; |
| break; |
| case 40: |
| syscall(__NR_sendmsg, r[10], 0, 0x8000); |
| break; |
| case 41: |
| syscall(__NR_sendmmsg, r[9], 0, 0, 0x40); |
| break; |
| case 42: |
| syscall(__NR_socket, 2, 2, 0x88); |
| break; |
| case 43: |
| res = syz_open_dev(0, 8, 0x200); |
| if (res != -1) |
| r[11] = res; |
| break; |
| case 44: |
| syscall(__NR_setsockopt, r[11], 0x29, 0x40, 0, 0); |
| break; |
| case 45: |
| NONFAILING(*(uint32_t*)0x20000000 = -1); |
| NONFAILING(*(uint16_t*)0x20000004 = 0x200); |
| NONFAILING(*(uint16_t*)0x20000006 = 0); |
| NONFAILING(*(uint32_t*)0x20000008 = -1); |
| NONFAILING(*(uint16_t*)0x2000000c = 0); |
| NONFAILING(*(uint16_t*)0x2000000e = 0); |
| syscall(__NR_ppoll, 0x20000000, 2, 0, 0, 0); |
| break; |
| case 46: |
| syscall(__NR_prctl, 0x23, 0xd, -1); |
| break; |
| case 47: |
| NONFAILING(memcpy((void*)0x20000140, "ntfs\x00", 5)); |
| syz_mount_image(0x20000140, 0, 0x600000000000000, 0, 0, 0, 0); |
| break; |
| case 48: |
| syscall(__NR_ioctl, -1, 0xc0485660, 0); |
| break; |
| case 49: |
| NONFAILING(*(uint32_t*)0x20000040 = 0); |
| NONFAILING(*(uint32_t*)0x20000044 = 9); |
| NONFAILING(*(uint32_t*)0x20000048 = 0); |
| NONFAILING(memcpy( |
| (void*)0x2000004c, |
| "\xf9\x4b\x14\xc1\x5c\x01\x4c\x3d\x03\x4e\x73\x65\x72\xcb\xaa\x0c\xf7" |
| "\x25\x78\x7d\xdd\xa3\xf1\xdc\x64\xdf\x4b\x92\xdc\x61\xba\x2f", |
| 32)); |
| NONFAILING(*(uint32_t*)0x2000006c = 0); |
| NONFAILING(*(uint32_t*)0x20000070 = 0); |
| NONFAILING(*(uint32_t*)0x20000074 = 0); |
| NONFAILING(*(uint32_t*)0x20000078 = 0); |
| NONFAILING(*(uint32_t*)0x2000007c = 0); |
| syscall(__NR_ioctl, -1, 0xc0405602, 0x20000040); |
| break; |
| case 50: |
| NONFAILING(memcpy((void*)0x20000100, "/dev/video#\x00", 12)); |
| res = syz_open_dev(0x20000100, 3, 0x8000); |
| if (res != -1) |
| r[12] = res; |
| break; |
| case 51: |
| res = syscall(__NR_socket, 0x1e, 0x400000000000004, 0); |
| if (res != -1) |
| r[13] = res; |
| break; |
| case 52: |
| NONFAILING(*(uint32_t*)0x20000040 = 0x80); |
| NONFAILING(*(uint32_t*)0x20000044 = 0); |
| NONFAILING(*(uint32_t*)0x20000048 = 3); |
| NONFAILING(*(uint32_t*)0x2000004c = 0x73d); |
| syscall(__NR_setsockopt, r[13], 0x10f, 0x87, 0x20000040, 0x29b); |
| break; |
| case 53: |
| NONFAILING(*(uint64_t*)0x20006ec0 = 0); |
| NONFAILING(*(uint64_t*)0x20006ec8 = 0); |
| syscall(__NR_recvmmsg, r[13], 0, 0, 0, 0x20006ec0); |
| break; |
| case 54: |
| syscall(__NR_ioctl, r[12], 0x80845663, 0x20000140); |
| break; |
| case 55: |
| res = syscall(__NR_openat, -1, 0, 0, 0x40); |
| if (res != -1) |
| r[14] = res; |
| break; |
| case 56: |
| NONFAILING(*(uint32_t*)0x20000240 = 0); |
| NONFAILING(*(uint16_t*)0x20000244 = 5); |
| NONFAILING(*(uint16_t*)0x20000246 = 7); |
| syscall(__NR_setsockopt, r[14], 0x84, 0x79, 0x20000240, 8); |
| break; |
| case 57: |
| NONFAILING(*(uint32_t*)0x20000280 = 0); |
| NONFAILING(*(uint32_t*)0x20000284 = 0x200); |
| NONFAILING(*(uint32_t*)0x20000288 = 0); |
| NONFAILING(*(uint32_t*)0x2000028c = 0xc3c2af2d); |
| NONFAILING(*(uint32_t*)0x20000290 = 0); |
| NONFAILING(*(uint32_t*)0x20000294 = 0); |
| NONFAILING(*(uint32_t*)0x20000298 = 0); |
| NONFAILING(*(uint32_t*)0x2000029c = 0); |
| NONFAILING(*(uint32_t*)0x200002a0 = 0); |
| NONFAILING(*(uint32_t*)0x200002a4 = 0); |
| NONFAILING(*(uint32_t*)0x200002a8 = 0); |
| NONFAILING(*(uint32_t*)0x200002ac = 0); |
| syscall(__NR_ioctl, r[12], 0xc0305602, 0x20000280); |
| break; |
| case 58: |
| syscall(__NR_openat, 0xffffffffffffff9c, 0, 2, 0); |
| break; |
| case 59: |
| NONFAILING(*(uint32_t*)0x20000040 = 0); |
| NONFAILING(*(uint32_t*)0x20000044 = 3); |
| NONFAILING(*(uint32_t*)0x20000048 = 0); |
| NONFAILING(memcpy( |
| (void*)0x2000004c, |
| "\xf9\x4b\x14\xc1\x5c\x01\x4c\x3d\x03\x4e\x73\x65\x72\xcb\xaa\x0c\xf7" |
| "\x25\x78\x7d\xdd\xa3\xf1\xdc\x64\xdf\x4b\x92\xdc\x61\xba\x2f", |
| 32)); |
| NONFAILING(*(uint32_t*)0x2000006c = 0); |
| NONFAILING(*(uint32_t*)0x20000070 = 0); |
| NONFAILING(*(uint32_t*)0x20000074 = 0); |
| NONFAILING(*(uint32_t*)0x20000078 = 0); |
| NONFAILING(*(uint32_t*)0x2000007c = 0); |
| syscall(__NR_ioctl, r[12], 0xc0405602, 0x20000040); |
| break; |
| } |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| install_segv_handler(); |
| for (procid = 0; procid < 6; procid++) { |
| if (fork() == 0) { |
| use_temporary_dir(); |
| do_sandbox_none(); |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |