| // INFO: rcu detected stall in call_timer_fn (2) |
| // https://syzkaller.appspot.com/bug?id=73a446efc0a99600388c27c9699148e28e5a2d80 |
| // 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.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/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <linux/capability.h> |
| #include <linux/futex.h> |
| #include <linux/genetlink.h> |
| #include <linux/if_addr.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_link.h> |
| #include <linux/if_tun.h> |
| #include <linux/in6.h> |
| #include <linux/ip.h> |
| #include <linux/neighbour.h> |
| #include <linux/net.h> |
| #include <linux/netlink.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/tcp.h> |
| #include <linux/veth.h> |
| |
| 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 thread_start(void* (*fn)(void*), void* arg) |
| { |
| pthread_t th; |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setstacksize(&attr, 128 << 10); |
| int i; |
| for (i = 0; i < 100; i++) { |
| if (pthread_create(&th, &attr, fn, arg) == 0) { |
| pthread_attr_destroy(&attr); |
| return; |
| } |
| if (errno == EAGAIN) { |
| usleep(50); |
| continue; |
| } |
| break; |
| } |
| exit(1); |
| } |
| |
| #define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) |
| #define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \ |
| *(type*)(addr) = \ |
| htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \ |
| (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) |
| |
| 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 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 struct { |
| char* pos; |
| int nesting; |
| struct nlattr* nested[8]; |
| char buf[1024]; |
| } nlmsg; |
| |
| static void netlink_init(int typ, int flags, const void* data, int size) |
| { |
| memset(&nlmsg, 0, sizeof(nlmsg)); |
| struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg.buf; |
| hdr->nlmsg_type = typ; |
| hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; |
| memcpy(hdr + 1, data, size); |
| nlmsg.pos = (char*)(hdr + 1) + NLMSG_ALIGN(size); |
| } |
| |
| static void netlink_attr(int typ, const void* data, int size) |
| { |
| struct nlattr* attr = (struct nlattr*)nlmsg.pos; |
| attr->nla_len = sizeof(*attr) + size; |
| attr->nla_type = typ; |
| memcpy(attr + 1, data, size); |
| nlmsg.pos += NLMSG_ALIGN(attr->nla_len); |
| } |
| |
| static int netlink_send(int sock) |
| { |
| if (nlmsg.pos > nlmsg.buf + sizeof(nlmsg.buf) || nlmsg.nesting) |
| exit(1); |
| struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg.buf; |
| hdr->nlmsg_len = nlmsg.pos - nlmsg.buf; |
| struct sockaddr_nl addr; |
| memset(&addr, 0, sizeof(addr)); |
| addr.nl_family = AF_NETLINK; |
| unsigned n = sendto(sock, nlmsg.buf, hdr->nlmsg_len, 0, |
| (struct sockaddr*)&addr, sizeof(addr)); |
| if (n != hdr->nlmsg_len) |
| exit(1); |
| n = recv(sock, nlmsg.buf, sizeof(nlmsg.buf), 0); |
| if (n < sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr)) |
| exit(1); |
| if (hdr->nlmsg_type != NLMSG_ERROR) |
| exit(1); |
| return -((struct nlmsgerr*)(hdr + 1))->error; |
| } |
| |
| static void netlink_device_change(int sock, const char* name, bool up, |
| const char* master, const void* mac, |
| int macsize) |
| { |
| struct ifinfomsg hdr; |
| memset(&hdr, 0, sizeof(hdr)); |
| if (up) |
| hdr.ifi_flags = hdr.ifi_change = IFF_UP; |
| netlink_init(RTM_NEWLINK, 0, &hdr, sizeof(hdr)); |
| netlink_attr(IFLA_IFNAME, name, strlen(name)); |
| if (master) { |
| int ifindex = if_nametoindex(master); |
| netlink_attr(IFLA_MASTER, &ifindex, sizeof(ifindex)); |
| } |
| if (macsize) |
| netlink_attr(IFLA_ADDRESS, mac, macsize); |
| int err = netlink_send(sock); |
| (void)err; |
| } |
| |
| static int netlink_add_addr(int sock, const char* dev, const void* addr, |
| int addrsize) |
| { |
| struct ifaddrmsg hdr; |
| memset(&hdr, 0, sizeof(hdr)); |
| hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6; |
| hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120; |
| hdr.ifa_scope = RT_SCOPE_UNIVERSE; |
| hdr.ifa_index = if_nametoindex(dev); |
| netlink_init(RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr, sizeof(hdr)); |
| netlink_attr(IFA_LOCAL, addr, addrsize); |
| netlink_attr(IFA_ADDRESS, addr, addrsize); |
| return netlink_send(sock); |
| } |
| |
| static void netlink_add_addr4(int sock, const char* dev, const char* addr) |
| { |
| struct in_addr in_addr; |
| inet_pton(AF_INET, addr, &in_addr); |
| int err = netlink_add_addr(sock, dev, &in_addr, sizeof(in_addr)); |
| (void)err; |
| } |
| |
| static void netlink_add_addr6(int sock, const char* dev, const char* addr) |
| { |
| struct in6_addr in6_addr; |
| inet_pton(AF_INET6, addr, &in6_addr); |
| int err = netlink_add_addr(sock, dev, &in6_addr, sizeof(in6_addr)); |
| (void)err; |
| } |
| |
| static void netlink_add_neigh(int sock, const char* name, const void* addr, |
| int addrsize, const void* mac, int macsize) |
| { |
| struct ndmsg hdr; |
| memset(&hdr, 0, sizeof(hdr)); |
| hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6; |
| hdr.ndm_ifindex = if_nametoindex(name); |
| hdr.ndm_state = NUD_PERMANENT; |
| netlink_init(RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr, sizeof(hdr)); |
| netlink_attr(NDA_DST, addr, addrsize); |
| netlink_attr(NDA_LLADDR, mac, macsize); |
| int err = netlink_send(sock); |
| (void)err; |
| } |
| |
| static int tunfd = -1; |
| static int tun_frags_enabled; |
| #define SYZ_TUN_MAX_PACKET_SIZE 1000 |
| |
| #define TUN_IFACE "syz_tun" |
| |
| #define LOCAL_MAC 0xaaaaaaaaaaaa |
| #define REMOTE_MAC 0xaaaaaaaaaabb |
| |
| #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; |
| char sysctl[64]; |
| sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/accept_dad", TUN_IFACE); |
| write_file(sysctl, "0"); |
| sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/router_solicitations", TUN_IFACE); |
| write_file(sysctl, "0"); |
| int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); |
| if (sock == -1) |
| exit(1); |
| netlink_add_addr4(sock, TUN_IFACE, LOCAL_IPV4); |
| netlink_add_addr6(sock, TUN_IFACE, LOCAL_IPV6); |
| uint64_t macaddr = REMOTE_MAC; |
| struct in_addr in_addr; |
| inet_pton(AF_INET, REMOTE_IPV4, &in_addr); |
| netlink_add_neigh(sock, TUN_IFACE, &in_addr, sizeof(in_addr), &macaddr, |
| ETH_ALEN); |
| struct in6_addr in6_addr; |
| inet_pton(AF_INET6, REMOTE_IPV6, &in6_addr); |
| netlink_add_neigh(sock, TUN_IFACE, &in6_addr, sizeof(in6_addr), &macaddr, |
| ETH_ALEN); |
| macaddr = LOCAL_MAC; |
| netlink_device_change(sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN); |
| close(sock); |
| } |
| |
| static int read_tun(char* data, int size) |
| { |
| if (tunfd < 0) |
| return -1; |
| int rv = read(tunfd, data, size); |
| if (rv < 0) { |
| if (errno == EAGAIN) |
| return -1; |
| if (errno == EBADFD) |
| return -1; |
| exit(1); |
| } |
| return rv; |
| } |
| |
| static void flush_tun() |
| { |
| char data[SYZ_TUN_MAX_PACKET_SIZE]; |
| while (read_tun(&data[0], sizeof(data)) != -1) { |
| } |
| } |
| |
| static long syz_genetlink_get_family_id(volatile long name) |
| { |
| char buf[512] = {0}; |
| struct nlmsghdr* hdr = (struct nlmsghdr*)buf; |
| struct genlmsghdr* genlhdr = (struct genlmsghdr*)NLMSG_DATA(hdr); |
| struct nlattr* attr = (struct nlattr*)(genlhdr + 1); |
| hdr->nlmsg_len = |
| sizeof(*hdr) + sizeof(*genlhdr) + sizeof(*attr) + GENL_NAMSIZ; |
| hdr->nlmsg_type = GENL_ID_CTRL; |
| hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
| genlhdr->cmd = CTRL_CMD_GETFAMILY; |
| attr->nla_type = CTRL_ATTR_FAMILY_NAME; |
| attr->nla_len = sizeof(*attr) + GENL_NAMSIZ; |
| NONFAILING(strncpy((char*)(attr + 1), (char*)name, GENL_NAMSIZ)); |
| struct iovec iov = {hdr, hdr->nlmsg_len}; |
| struct sockaddr_nl addr = {0}; |
| addr.nl_family = AF_NETLINK; |
| int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); |
| if (fd == -1) { |
| return -1; |
| } |
| struct msghdr msg = {&addr, sizeof(addr), &iov, 1, NULL, 0, 0}; |
| if (sendmsg(fd, &msg, 0) == -1) { |
| close(fd); |
| return -1; |
| } |
| ssize_t n = recv(fd, buf, sizeof(buf), 0); |
| close(fd); |
| if (n <= 0) { |
| return -1; |
| } |
| if (hdr->nlmsg_type != GENL_ID_CTRL) { |
| return -1; |
| } |
| for (; (char*)attr < buf + n; |
| attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) { |
| if (attr->nla_type == CTRL_ATTR_FAMILY_ID) |
| return *(uint16_t*)(attr + 1); |
| } |
| return -1; |
| } |
| |
| static void setup_common() |
| { |
| if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) { |
| } |
| } |
| |
| static void loop(); |
| |
| static void sandbox_common() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| setsid(); |
| struct rlimit rlim; |
| rlim.rlim_cur = rlim.rlim_max = (200 << 20); |
| setrlimit(RLIMIT_AS, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 32 << 20; |
| setrlimit(RLIMIT_MEMLOCK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 136 << 20; |
| setrlimit(RLIMIT_FSIZE, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 1 << 20; |
| setrlimit(RLIMIT_STACK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 0; |
| setrlimit(RLIMIT_CORE, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 256; |
| setrlimit(RLIMIT_NOFILE, &rlim); |
| if (unshare(CLONE_NEWNS)) { |
| } |
| if (unshare(CLONE_NEWIPC)) { |
| } |
| if (unshare(0x02000000)) { |
| } |
| if (unshare(CLONE_NEWUTS)) { |
| } |
| if (unshare(CLONE_SYSVSEM)) { |
| } |
| typedef struct { |
| const char* name; |
| const char* value; |
| } sysctl_t; |
| static const sysctl_t sysctls[] = { |
| {"/proc/sys/kernel/shmmax", "16777216"}, |
| {"/proc/sys/kernel/shmall", "536870912"}, |
| {"/proc/sys/kernel/shmmni", "1024"}, |
| {"/proc/sys/kernel/msgmax", "8192"}, |
| {"/proc/sys/kernel/msgmni", "1024"}, |
| {"/proc/sys/kernel/msgmnb", "1024"}, |
| {"/proc/sys/kernel/sem", "1024 1048576 500 1024"}, |
| }; |
| unsigned i; |
| for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++) |
| write_file(sysctls[i].name, sysctls[i].value); |
| } |
| |
| int wait_for_loop(int pid) |
| { |
| if (pid < 0) |
| exit(1); |
| int status = 0; |
| while (waitpid(-1, &status, __WALL) != pid) { |
| } |
| return WEXITSTATUS(status); |
| } |
| |
| static void drop_caps(void) |
| { |
| struct __user_cap_header_struct cap_hdr = {}; |
| struct __user_cap_data_struct cap_data[2] = {}; |
| cap_hdr.version = _LINUX_CAPABILITY_VERSION_3; |
| cap_hdr.pid = getpid(); |
| if (syscall(SYS_capget, &cap_hdr, &cap_data)) |
| exit(1); |
| const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE); |
| cap_data[0].effective &= ~drop; |
| cap_data[0].permitted &= ~drop; |
| cap_data[0].inheritable &= ~drop; |
| if (syscall(SYS_capset, &cap_hdr, &cap_data)) |
| exit(1); |
| } |
| |
| 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(); |
| drop_caps(); |
| if (unshare(CLONE_NEWNET)) { |
| } |
| initialize_tun(); |
| loop(); |
| 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) { |
| } |
| } |
| |
| static void setup_test() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| write_file("/proc/self/oom_score_adj", "1000"); |
| flush_tun(); |
| } |
| |
| static void close_fds() |
| { |
| 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; |
| for (call = 0; call < 21; 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); |
| event_timedwait(&th->done, 45); |
| break; |
| } |
| } |
| for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) |
| sleep_ms(1); |
| close_fds(); |
| } |
| |
| static void execute_one(void); |
| |
| #define WAIT_FLAGS __WALL |
| |
| static void loop(void) |
| { |
| int iter; |
| for (iter = 0;; iter++) { |
| int pid = fork(); |
| if (pid < 0) |
| exit(1); |
| if (pid == 0) { |
| setup_test(); |
| execute_one(); |
| 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; |
| } |
| } |
| } |
| |
| uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, |
| 0x0}; |
| |
| void execute_call(int call) |
| { |
| intptr_t res; |
| switch (call) { |
| case 0: |
| syscall(__NR_mkdir, 0, 0); |
| break; |
| case 1: |
| syscall(__NR_fchdir, -1); |
| break; |
| case 2: |
| syscall(__NR_mkdir, 0, 0); |
| break; |
| case 3: |
| syz_genetlink_get_family_id(0); |
| break; |
| case 4: |
| res = syscall(__NR_socket, 0x10, 3, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 5: |
| res = syscall(__NR_socket, 0x10, 3, 0); |
| if (res != -1) |
| r[1] = res; |
| break; |
| case 6: |
| res = syscall(__NR_socket, 0x10, 0x803, 0); |
| if (res != -1) |
| r[2] = res; |
| break; |
| case 7: |
| NONFAILING(*(uint64_t*)0x200001c0 = 0); |
| NONFAILING(*(uint32_t*)0x200001c8 = 0); |
| NONFAILING(*(uint64_t*)0x200001d0 = 0x20000180); |
| NONFAILING(*(uint64_t*)0x20000180 = 0); |
| NONFAILING(*(uint64_t*)0x20000188 = 0); |
| NONFAILING(*(uint64_t*)0x200001d8 = 1); |
| NONFAILING(*(uint64_t*)0x200001e0 = 0); |
| NONFAILING(*(uint64_t*)0x200001e8 = 0); |
| NONFAILING(*(uint32_t*)0x200001f0 = 0); |
| syscall(__NR_sendmsg, r[2], 0x200001c0, 0); |
| break; |
| case 8: |
| NONFAILING(*(uint32_t*)0x20000200 = 0x14); |
| res = syscall(__NR_getsockname, r[2], 0x20000100, 0x20000200); |
| if (res != -1) |
| NONFAILING(r[3] = *(uint32_t*)0x20000104); |
| break; |
| case 9: |
| NONFAILING(*(uint64_t*)0x20000040 = 0); |
| NONFAILING(*(uint32_t*)0x20000048 = 0); |
| NONFAILING(*(uint64_t*)0x20000050 = 0x20000000); |
| NONFAILING(*(uint64_t*)0x20000000 = 0x20000080); |
| NONFAILING(*(uint32_t*)0x20000080 = 0x48); |
| NONFAILING(*(uint16_t*)0x20000084 = 0x10); |
| NONFAILING(*(uint16_t*)0x20000086 = 0x705); |
| NONFAILING(*(uint32_t*)0x20000088 = 0); |
| NONFAILING(*(uint32_t*)0x2000008c = 0); |
| NONFAILING(*(uint8_t*)0x20000090 = 0); |
| NONFAILING(*(uint8_t*)0x20000091 = 0); |
| NONFAILING(*(uint16_t*)0x20000092 = 0); |
| NONFAILING(*(uint32_t*)0x20000094 = r[3]); |
| NONFAILING(*(uint32_t*)0x20000098 = 0); |
| NONFAILING(*(uint32_t*)0x2000009c = 0); |
| NONFAILING(*(uint16_t*)0x200000a0 = 0x28); |
| NONFAILING(*(uint16_t*)0x200000a2 = 0x12); |
| NONFAILING(*(uint16_t*)0x200000a4 = 0xc); |
| NONFAILING(*(uint16_t*)0x200000a6 = 1); |
| NONFAILING(memcpy((void*)0x200000a8, "veth\000", 5)); |
| NONFAILING(*(uint16_t*)0x200000b0 = 0x18); |
| NONFAILING(*(uint16_t*)0x200000b2 = 2); |
| NONFAILING(*(uint16_t*)0x200000b4 = 0x14); |
| NONFAILING(*(uint16_t*)0x200000b6 = 1); |
| NONFAILING(*(uint8_t*)0x200000b8 = 0); |
| NONFAILING(*(uint8_t*)0x200000b9 = 0); |
| NONFAILING(*(uint16_t*)0x200000ba = 0); |
| NONFAILING(*(uint32_t*)0x200000bc = 0); |
| NONFAILING(*(uint32_t*)0x200000c0 = 0); |
| NONFAILING(*(uint32_t*)0x200000c4 = 0); |
| NONFAILING(*(uint64_t*)0x20000008 = 0x48); |
| NONFAILING(*(uint64_t*)0x20000058 = 1); |
| NONFAILING(*(uint64_t*)0x20000060 = 0); |
| NONFAILING(*(uint64_t*)0x20000068 = 0); |
| NONFAILING(*(uint32_t*)0x20000070 = 0); |
| syscall(__NR_sendmsg, r[1], 0x20000040, 0); |
| break; |
| case 10: |
| NONFAILING(*(uint64_t*)0x20000240 = 0); |
| NONFAILING(*(uint32_t*)0x20000248 = 0); |
| NONFAILING(*(uint64_t*)0x20000250 = 0x20000080); |
| NONFAILING(*(uint64_t*)0x20000080 = 0x20000280); |
| NONFAILING(*(uint32_t*)0x20000280 = 0x30); |
| NONFAILING(*(uint16_t*)0x20000284 = 0x24); |
| NONFAILING(*(uint16_t*)0x20000286 = 0x507); |
| NONFAILING(*(uint32_t*)0x20000288 = 0); |
| NONFAILING(*(uint32_t*)0x2000028c = 0); |
| NONFAILING(*(uint8_t*)0x20000290 = 0); |
| NONFAILING(*(uint32_t*)0x20000294 = r[3]); |
| NONFAILING(*(uint16_t*)0x20000298 = 0); |
| NONFAILING(*(uint16_t*)0x2000029a = 0); |
| NONFAILING(*(uint16_t*)0x2000029c = -1); |
| NONFAILING(*(uint16_t*)0x2000029e = -1); |
| NONFAILING(*(uint16_t*)0x200002a0 = 0); |
| NONFAILING(*(uint16_t*)0x200002a2 = 0); |
| NONFAILING(*(uint16_t*)0x200002a4 = 8); |
| NONFAILING(*(uint16_t*)0x200002a6 = 1); |
| NONFAILING(memcpy((void*)0x200002a8, "pie\000", 4)); |
| NONFAILING(*(uint16_t*)0x200002ac = 4); |
| NONFAILING(*(uint16_t*)0x200002ae = 2); |
| NONFAILING(*(uint64_t*)0x20000088 = 0x30); |
| NONFAILING(*(uint64_t*)0x20000258 = 1); |
| NONFAILING(*(uint64_t*)0x20000260 = 0); |
| NONFAILING(*(uint64_t*)0x20000268 = 0); |
| NONFAILING(*(uint32_t*)0x20000270 = 0); |
| syscall(__NR_sendmsg, r[0], 0x20000240, 0); |
| break; |
| case 11: |
| syscall(__NR_socket, 0x10, 0x803, 0); |
| break; |
| case 12: |
| syscall(__NR_sendmsg, -1, 0, 0); |
| break; |
| case 13: |
| syscall(__NR_sendmsg, -1, 0, 0); |
| break; |
| case 14: |
| NONFAILING(*(uint32_t*)0x2001d000 = 1); |
| NONFAILING(*(uint32_t*)0x2001d004 = 0x70); |
| NONFAILING(*(uint8_t*)0x2001d008 = 0); |
| NONFAILING(*(uint8_t*)0x2001d009 = 0); |
| NONFAILING(*(uint8_t*)0x2001d00a = 0); |
| NONFAILING(*(uint8_t*)0x2001d00b = 0); |
| NONFAILING(*(uint32_t*)0x2001d00c = 0); |
| NONFAILING(*(uint64_t*)0x2001d010 = 0x7f); |
| NONFAILING(*(uint64_t*)0x2001d018 = 0); |
| NONFAILING(*(uint64_t*)0x2001d020 = 0); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 0, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 1, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 2, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 3, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 4, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 5, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 6, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 7, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 8, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 9, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 10, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 11, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 12, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 13, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 14, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 15, 2)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 5, 17, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 18, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 19, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 20, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 21, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 22, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 23, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 24, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 25, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 26, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 27, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 28, 1)); |
| NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 29, 35)); |
| NONFAILING(*(uint32_t*)0x2001d030 = 0); |
| NONFAILING(*(uint32_t*)0x2001d034 = 0); |
| NONFAILING(*(uint64_t*)0x2001d038 = 0); |
| NONFAILING(*(uint64_t*)0x2001d040 = 0); |
| NONFAILING(*(uint64_t*)0x2001d048 = 0); |
| NONFAILING(*(uint64_t*)0x2001d050 = 0); |
| NONFAILING(*(uint32_t*)0x2001d058 = 0); |
| NONFAILING(*(uint32_t*)0x2001d05c = 0); |
| NONFAILING(*(uint64_t*)0x2001d060 = 0); |
| NONFAILING(*(uint32_t*)0x2001d068 = 0); |
| NONFAILING(*(uint16_t*)0x2001d06c = 0); |
| NONFAILING(*(uint16_t*)0x2001d06e = 0); |
| syscall(__NR_perf_event_open, 0x2001d000, 0, -1, -1, 0); |
| break; |
| case 15: |
| syscall(__NR_openat, 0xffffffffffffff9c, 0, 0x200002, 0); |
| break; |
| case 16: |
| syscall(__NR_mkdir, 0, 0); |
| break; |
| case 17: |
| syscall(__NR_fsetxattr, -1, 0, 0, 0, 3); |
| break; |
| case 18: |
| syscall(__NR_sendmsg, -1, 0, 0); |
| break; |
| case 19: |
| syscall(__NR_sendmsg, -1, 0, 0); |
| break; |
| case 20: |
| syscall(__NR_socket, 0x10, 3, 0); |
| break; |
| } |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| install_segv_handler(); |
| do_sandbox_none(); |
| return 0; |
| } |