// https://syzkaller.appspot.com/bug?id=30bd1636e7e9855fcff13a1e272994fc3920dff8 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __NR_ioctl #define __NR_ioctl 29 #endif #ifndef __NR_madvise #define __NR_madvise 233 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_openat #define __NR_openat 56 #endif #ifndef __NR_read #define __NR_read 63 #endif #ifndef __NR_sendmsg #define __NR_sendmsg 211 #endif #ifndef __NR_socket #define __NR_socket 198 #endif 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; } #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)))) 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; } struct nlmsg { char* pos; int nesting; struct nlattr* nested[8]; char buf[4096]; }; static void netlink_init(struct nlmsg* nlmsg, 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(struct nlmsg* nlmsg, int typ, const void* data, int size) { struct nlattr* attr = (struct nlattr*)nlmsg->pos; attr->nla_len = sizeof(*attr) + size; attr->nla_type = typ; if (size > 0) memcpy(attr + 1, data, size); nlmsg->pos += NLMSG_ALIGN(attr->nla_len); } static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type, int* reply_len, bool dofail) { 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; ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr)); if (n != (ssize_t)hdr->nlmsg_len) { if (dofail) exit(1); return -1; } n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); if (reply_len) *reply_len = 0; if (n < 0) { if (dofail) exit(1); return -1; } if (n < (ssize_t)sizeof(struct nlmsghdr)) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type == NLMSG_DONE) return 0; if (reply_len && hdr->nlmsg_type == reply_type) { *reply_len = n; return 0; } if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type != NLMSG_ERROR) { errno = EINVAL; if (dofail) exit(1); return -1; } errno = -((struct nlmsgerr*)(hdr + 1))->error; return -errno; } static int netlink_send(struct nlmsg* nlmsg, int sock) { return netlink_send_ext(nlmsg, sock, 0, NULL, true); } static int netlink_query_family_id(struct nlmsg* nlmsg, int sock, const char* family_name, bool dofail) { struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = CTRL_CMD_GETFAMILY; netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name, strnlen(family_name, GENL_NAMSIZ - 1) + 1); int n = 0; int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail); if (err < 0) { return -1; } uint16_t id = 0; struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN + NLMSG_ALIGN(sizeof(genlhdr))); for (; (char*)attr < nlmsg->buf + n; attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) { if (attr->nla_type == CTRL_ATTR_FAMILY_ID) { id = *(uint16_t*)(attr + 1); break; } } if (!id) { errno = EINVAL; return -1; } recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); return id; } static struct nlmsg nlmsg; #define WIFI_INITIAL_DEVICE_COUNT 2 #define WIFI_MAC_BASE \ { \ 0x08, 0x02, 0x11, 0x00, 0x00, 0x00 \ } #define WIFI_IBSS_BSSID \ { \ 0x50, 0x50, 0x50, 0x50, 0x50, 0x50 \ } #define WIFI_IBSS_SSID \ { \ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10 \ } #define WIFI_DEFAULT_FREQUENCY 2412 #define WIFI_DEFAULT_SIGNAL 0 #define WIFI_DEFAULT_RX_RATE 1 #define HWSIM_CMD_REGISTER 1 #define HWSIM_CMD_FRAME 2 #define HWSIM_CMD_NEW_RADIO 4 #define HWSIM_ATTR_SUPPORT_P2P_DEVICE 14 #define HWSIM_ATTR_PERM_ADDR 22 #define IF_OPER_UP 6 struct join_ibss_props { int wiphy_freq; bool wiphy_freq_fixed; uint8_t* mac; uint8_t* ssid; int ssid_len; }; static int set_interface_state(const char* interface_name, int on) { struct ifreq ifr; int sock = socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) { return -1; } memset(&ifr, 0, sizeof(ifr)); strcpy(ifr.ifr_name, interface_name); int ret = ioctl(sock, SIOCGIFFLAGS, &ifr); if (ret < 0) { close(sock); return -1; } if (on) ifr.ifr_flags |= IFF_UP; else ifr.ifr_flags &= ~IFF_UP; ret = ioctl(sock, SIOCSIFFLAGS, &ifr); close(sock); if (ret < 0) { return -1; } return 0; } static int nl80211_set_interface(struct nlmsg* nlmsg, int sock, int nl80211_family, uint32_t ifindex, uint32_t iftype, bool dofail) { struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = NL80211_CMD_SET_INTERFACE; netlink_init(nlmsg, nl80211_family, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(nlmsg, NL80211_ATTR_IFINDEX, &ifindex, sizeof(ifindex)); netlink_attr(nlmsg, NL80211_ATTR_IFTYPE, &iftype, sizeof(iftype)); int err = netlink_send_ext(nlmsg, sock, 0, NULL, dofail); if (err < 0) { } return err; } static int nl80211_join_ibss(struct nlmsg* nlmsg, int sock, int nl80211_family, uint32_t ifindex, struct join_ibss_props* props, bool dofail) { struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = NL80211_CMD_JOIN_IBSS; netlink_init(nlmsg, nl80211_family, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(nlmsg, NL80211_ATTR_IFINDEX, &ifindex, sizeof(ifindex)); netlink_attr(nlmsg, NL80211_ATTR_SSID, props->ssid, props->ssid_len); netlink_attr(nlmsg, NL80211_ATTR_WIPHY_FREQ, &(props->wiphy_freq), sizeof(props->wiphy_freq)); if (props->mac) netlink_attr(nlmsg, NL80211_ATTR_MAC, props->mac, ETH_ALEN); if (props->wiphy_freq_fixed) netlink_attr(nlmsg, NL80211_ATTR_FREQ_FIXED, NULL, 0); int err = netlink_send_ext(nlmsg, sock, 0, NULL, dofail); if (err < 0) { } return err; } static int get_ifla_operstate(struct nlmsg* nlmsg, int ifindex, bool dofail) { struct ifinfomsg info; memset(&info, 0, sizeof(info)); info.ifi_family = AF_UNSPEC; info.ifi_index = ifindex; int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); if (sock == -1) { return -1; } netlink_init(nlmsg, RTM_GETLINK, 0, &info, sizeof(info)); int n; int err = netlink_send_ext(nlmsg, sock, RTM_NEWLINK, &n, dofail); close(sock); if (err) { return -1; } struct rtattr* attr = IFLA_RTA(NLMSG_DATA(nlmsg->buf)); for (; RTA_OK(attr, n); attr = RTA_NEXT(attr, n)) { if (attr->rta_type == IFLA_OPERSTATE) return *((int32_t*)RTA_DATA(attr)); } return -1; } static int await_ifla_operstate(struct nlmsg* nlmsg, char* interface, int operstate, bool dofail) { int ifindex = if_nametoindex(interface); while (true) { usleep(1000); int ret = get_ifla_operstate(nlmsg, ifindex, dofail); if (ret < 0) return ret; if (ret == operstate) return 0; } return 0; } static int nl80211_setup_ibss_interface(struct nlmsg* nlmsg, int sock, int nl80211_family_id, char* interface, struct join_ibss_props* ibss_props, bool dofail) { int ifindex = if_nametoindex(interface); if (ifindex == 0) { return -1; } int ret = nl80211_set_interface(nlmsg, sock, nl80211_family_id, ifindex, NL80211_IFTYPE_ADHOC, dofail); if (ret < 0) { return -1; } ret = set_interface_state(interface, 1); if (ret < 0) { return -1; } ret = nl80211_join_ibss(nlmsg, sock, nl80211_family_id, ifindex, ibss_props, dofail); if (ret < 0) { return -1; } return 0; } static int hwsim80211_create_device(struct nlmsg* nlmsg, int sock, int hwsim_family, uint8_t mac_addr[ETH_ALEN]) { struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = HWSIM_CMD_NEW_RADIO; netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(nlmsg, HWSIM_ATTR_SUPPORT_P2P_DEVICE, NULL, 0); netlink_attr(nlmsg, HWSIM_ATTR_PERM_ADDR, mac_addr, ETH_ALEN); int err = netlink_send(nlmsg, sock); if (err < 0) { } return err; } static void initialize_wifi_devices(void) { int rfkill = open("/dev/rfkill", O_RDWR); if (rfkill == -1) exit(1); struct rfkill_event event = {0}; event.type = RFKILL_TYPE_ALL; event.op = RFKILL_OP_CHANGE_ALL; if (write(rfkill, &event, sizeof(event)) != (ssize_t)(sizeof(event))) exit(1); close(rfkill); uint8_t mac_addr[6] = WIFI_MAC_BASE; int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (sock < 0) exit(1); int hwsim_family_id = netlink_query_family_id(&nlmsg, sock, "MAC80211_HWSIM", true); int nl80211_family_id = netlink_query_family_id(&nlmsg, sock, "nl80211", true); if (hwsim_family_id < 0 || nl80211_family_id < 0) exit(1); uint8_t ssid[] = WIFI_IBSS_SSID; uint8_t bssid[] = WIFI_IBSS_BSSID; struct join_ibss_props ibss_props = {.wiphy_freq = WIFI_DEFAULT_FREQUENCY, .wiphy_freq_fixed = true, .mac = bssid, .ssid = ssid, .ssid_len = sizeof(ssid)}; for (int device_id = 0; device_id < WIFI_INITIAL_DEVICE_COUNT; device_id++) { mac_addr[5] = device_id; int ret = hwsim80211_create_device(&nlmsg, sock, hwsim_family_id, mac_addr); if (ret < 0) exit(1); char interface[6] = "wlan0"; interface[4] += device_id; if (nl80211_setup_ibss_interface(&nlmsg, sock, nl80211_family_id, interface, &ibss_props, true) < 0) exit(1); } for (int device_id = 0; device_id < WIFI_INITIAL_DEVICE_COUNT; device_id++) { char interface[6] = "wlan0"; interface[4] += device_id; int ret = await_ifla_operstate(&nlmsg, interface, IF_OPER_UP, true); if (ret < 0) exit(1); } close(sock); } #define MAX_FDS 30 static long syz_open_procfs(volatile long a0, volatile long a1) { char buf[128]; memset(buf, 0, sizeof(buf)); if (a0 == 0) { snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1); } else if (a0 == -1) { snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1); } else { snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1); } int fd = open(buf, O_RDWR); if (fd == -1) fd = open(buf, O_RDONLY); return fd; } static long syz_genetlink_get_family_id(volatile long name, volatile long sock_arg) { int fd = sock_arg; if (fd < 0) { fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (fd == -1) { return -1; } } struct nlmsg nlmsg_tmp; int ret = netlink_query_family_id(&nlmsg_tmp, fd, (char*)name, false); if ((int)sock_arg < 0) close(fd); if (ret < 0) { return -1; } return ret; } static void setup_binderfs(); static void setup_fusectl(); static void sandbox_common_mount_tmpfs(void) { write_file("/proc/sys/fs/mount-max", "100000"); if (mkdir("./syz-tmp", 0777)) exit(1); if (mount("", "./syz-tmp", "tmpfs", 0, NULL)) exit(1); if (mkdir("./syz-tmp/newroot", 0777)) exit(1); if (mkdir("./syz-tmp/newroot/dev", 0700)) exit(1); unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE; if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL)) exit(1); if (mkdir("./syz-tmp/newroot/proc", 0700)) exit(1); if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL)) exit(1); if (mkdir("./syz-tmp/newroot/selinux", 0700)) exit(1); const char* selinux_path = "./syz-tmp/newroot/selinux"; if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) { if (errno != ENOENT) exit(1); if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); } if (mkdir("./syz-tmp/newroot/sys", 0700)) exit(1); if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL)) exit(1); if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); if (mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); if (mkdir("./syz-tmp/pivot", 0777)) exit(1); if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) { if (chdir("./syz-tmp")) exit(1); } else { if (chdir("/")) exit(1); if (umount2("./pivot", MNT_DETACH)) exit(1); } if (chroot("./newroot")) exit(1); if (chdir("/")) exit(1); setup_binderfs(); setup_fusectl(); } static void setup_fusectl() { if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) { } } static void setup_binderfs() { if (mkdir("/dev/binderfs", 0777)) { } if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) { } if (symlink("/dev/binderfs", "./binderfs")) { } } static void loop(); static void sandbox_common() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); if (getppid() == 1) exit(1); 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 = 128 << 20; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); if (unshare(CLONE_NEWNS)) { } if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) { } 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); } static 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); sandbox_common(); drop_caps(); if (unshare(CLONE_NEWNET)) { } write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535"); initialize_wifi_devices(); sandbox_common_mount_tmpfs(); loop(); exit(1); } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); for (int 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"); } static void close_fds() { for (int fd = 3; fd < MAX_FDS; fd++) close(fd); } #define HWSIM_ATTR_RX_RATE 5 #define HWSIM_ATTR_SIGNAL 6 #define HWSIM_ATTR_ADDR_RECEIVER 1 #define HWSIM_ATTR_FRAME 3 #define WIFI_MAX_INJECT_LEN 2048 static int hwsim_register_socket(struct nlmsg* nlmsg, int sock, int hwsim_family) { struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = HWSIM_CMD_REGISTER; netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr)); int err = netlink_send_ext(nlmsg, sock, 0, NULL, false); if (err < 0) { } return err; } static int hwsim_inject_frame(struct nlmsg* nlmsg, int sock, int hwsim_family, uint8_t* mac_addr, uint8_t* data, int len) { struct genlmsghdr genlhdr; uint32_t rx_rate = WIFI_DEFAULT_RX_RATE; uint32_t signal = WIFI_DEFAULT_SIGNAL; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = HWSIM_CMD_FRAME; netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(nlmsg, HWSIM_ATTR_RX_RATE, &rx_rate, sizeof(rx_rate)); netlink_attr(nlmsg, HWSIM_ATTR_SIGNAL, &signal, sizeof(signal)); netlink_attr(nlmsg, HWSIM_ATTR_ADDR_RECEIVER, mac_addr, ETH_ALEN); netlink_attr(nlmsg, HWSIM_ATTR_FRAME, data, len); int err = netlink_send_ext(nlmsg, sock, 0, NULL, false); if (err < 0) { } return err; } static long syz_80211_inject_frame(volatile long a0, volatile long a1, volatile long a2) { uint8_t* mac_addr = (uint8_t*)a0; uint8_t* buf = (uint8_t*)a1; int buf_len = (int)a2; struct nlmsg tmp_msg; if (buf_len < 0 || buf_len > WIFI_MAX_INJECT_LEN) { return -1; } int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (sock < 0) { return -1; } int hwsim_family_id = netlink_query_family_id(&tmp_msg, sock, "MAC80211_HWSIM", false); if (hwsim_family_id < 0) { close(sock); return -1; } int ret = hwsim_register_socket(&tmp_msg, sock, hwsim_family_id); if (ret < 0) { close(sock); return -1; } ret = hwsim_inject_frame(&tmp_msg, sock, hwsim_family_id, mac_addr, buf, buf_len); close(sock); if (ret < 0) { return -1; } return 0; } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { setup_test(); execute_one(); close_fds(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { sleep_ms(10); if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } uint64_t r[5] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10); if (res != -1) r[0] = res; memcpy((void*)0x20000080, "nl80211\000", 8); res = -1; res = syz_genetlink_get_family_id(/*name=*/0x20000080, /*fd=*/-1); if (res != -1) r[1] = res; syscall( __NR_mmap, /*addr=*/0x20800000ul, /*len=*/0x800000ul, /*prot=*/0ul, /*flags=MAP_LOCKED|MAP_HUGETLB|MAP_FIXED|MAP_ANONYMOUS|0x2*/ 0x42032ul, /*fd=*/-1, /*offset=*/0ul); memcpy((void*)0x20000040, "smaps\000", 6); res = -1; res = syz_open_procfs(/*pid=*/0, /*file=*/0x20000040); if (res != -1) r[2] = res; *(uint64_t*)0x20000280 = 0; *(uint32_t*)0x20000288 = 0; *(uint64_t*)0x20000290 = 0x20000240; *(uint64_t*)0x20000240 = 0x20000180; memset((void*)0x20000180, 5, 1); *(uint64_t*)0x20000248 = 0x48; *(uint64_t*)0x20000298 = 1; *(uint64_t*)0x200002a0 = 0; *(uint64_t*)0x200002a8 = 0; *(uint32_t*)0x200002b0 = 0; syscall(__NR_sendmsg, /*fd=*/-1, /*msg=*/0x20000280ul, /*f=*/0ul); *(uint64_t*)0x20000500 = 0; *(uint32_t*)0x20000508 = 0; *(uint64_t*)0x20000510 = 0x200004c0; *(uint64_t*)0x200004c0 = 0x20000440; memcpy((void*)0x20000440, "\x05\x00\x00\x00\x05\x08", 6); *(uint64_t*)0x200004c8 = 0x80; *(uint64_t*)0x20000518 = 1; *(uint64_t*)0x20000520 = 0; *(uint64_t*)0x20000528 = 0; *(uint32_t*)0x20000530 = 0; syscall(__NR_sendmsg, /*fd=*/-1, /*msg=*/0x20000500ul, /*f=*/0ul); syscall(__NR_madvise, /*addr=*/0x20c00000ul, /*len=*/0x400000ul, /*advice=MADV_HUGEPAGE*/ 0xeul); syscall(__NR_read, /*fd=*/r[2], /*buf=*/0x20000080ul, /*len=*/0x2020ul); memcpy((void*)0x200000c0, "wlan1\000\000\000\000\000\000\000\000\000\000\000", 16); res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8933, /*arg=*/0x200000c0ul); if (res != -1) r[3] = *(uint32_t*)0x200000d0; memcpy((void*)0x20001800, "/dev/snd/timer\000", 15); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20001800ul, /*flags=*/0, 0); if (res != -1) r[4] = res; syscall(__NR_ioctl, /*fd=*/r[4], /*cmd=*/0x80585414, /*arg=*/0ul); *(uint64_t*)0x20000100 = 0; *(uint32_t*)0x20000108 = 0; *(uint64_t*)0x20000110 = 0x20000140; *(uint64_t*)0x20000140 = 0x20000180; *(uint32_t*)0x20000180 = 0x24; *(uint16_t*)0x20000184 = r[1]; *(uint16_t*)0x20000186 = 5; *(uint32_t*)0x20000188 = 0; *(uint32_t*)0x2000018c = 0; *(uint8_t*)0x20000190 = 6; *(uint8_t*)0x20000191 = 0; *(uint16_t*)0x20000192 = 0; *(uint16_t*)0x20000194 = 8; *(uint16_t*)0x20000196 = 3; *(uint32_t*)0x20000198 = r[3]; *(uint16_t*)0x2000019c = 8; *(uint16_t*)0x2000019e = 5; *(uint32_t*)0x200001a0 = 2; *(uint64_t*)0x20000148 = 0x24; *(uint64_t*)0x20000118 = 1; *(uint64_t*)0x20000120 = 0; *(uint64_t*)0x20000128 = 0; *(uint32_t*)0x20000130 = 0; syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x20000100ul, /*f=*/0ul); *(uint64_t*)0x200001c0 = 0; *(uint32_t*)0x200001c8 = 0; *(uint64_t*)0x200001d0 = 0x20000200; *(uint64_t*)0x20000200 = 0x20000240; *(uint32_t*)0x20000240 = 0x44; *(uint16_t*)0x20000244 = r[1]; *(uint16_t*)0x20000246 = 5; *(uint32_t*)0x20000248 = 0; *(uint32_t*)0x2000024c = 0; *(uint8_t*)0x20000250 = 0x2e; *(uint8_t*)0x20000251 = 0; *(uint16_t*)0x20000252 = 0; *(uint16_t*)0x20000254 = 8; *(uint16_t*)0x20000256 = 3; *(uint32_t*)0x20000258 = r[3]; *(uint16_t*)0x2000025c = 0xa; *(uint16_t*)0x2000025e = 0x34; memset((void*)0x20000260, 2, 6); *(uint16_t*)0x20000268 = 0xa; *(uint16_t*)0x2000026a = 6; *(uint8_t*)0x2000026c = 8; *(uint8_t*)0x2000026d = 2; *(uint8_t*)0x2000026e = 0x11; *(uint8_t*)0x2000026f = 0; *(uint8_t*)0x20000270 = 0; *(uint8_t*)0x20000271 = 0; *(uint16_t*)0x20000274 = 8; *(uint16_t*)0x20000276 = 0x35; *(uint32_t*)0x20000278 = 0; *(uint16_t*)0x2000027c = 8; *(uint16_t*)0x2000027e = 0x26; *(uint32_t*)0x20000280 = 0x96c; *(uint64_t*)0x20000208 = 0x44; *(uint64_t*)0x200001d8 = 1; *(uint64_t*)0x200001e0 = 0; *(uint64_t*)0x200001e8 = 0; *(uint32_t*)0x200001f0 = 0; syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200001c0ul, /*f=*/0ul); *(uint8_t*)0x200002c0 = 8; *(uint8_t*)0x200002c1 = 2; *(uint8_t*)0x200002c2 = 0x11; *(uint8_t*)0x200002c3 = 0; *(uint8_t*)0x200002c4 = 0; *(uint8_t*)0x200002c5 = 1; STORE_BY_BITMASK(uint8_t, , 0x20000300, 0, 0, 2); STORE_BY_BITMASK(uint8_t, , 0x20000300, 0, 2, 2); STORE_BY_BITMASK(uint8_t, , 0x20000300, 5, 4, 4); STORE_BY_BITMASK(uint8_t, , 0x20000301, 0, 0, 1); STORE_BY_BITMASK(uint8_t, , 0x20000301, 0, 1, 1); STORE_BY_BITMASK(uint8_t, , 0x20000301, 0, 2, 1); STORE_BY_BITMASK(uint8_t, , 0x20000301, 0, 3, 1); STORE_BY_BITMASK(uint8_t, , 0x20000301, 0, 4, 1); STORE_BY_BITMASK(uint8_t, , 0x20000301, 0, 5, 1); STORE_BY_BITMASK(uint8_t, , 0x20000301, 0, 6, 1); STORE_BY_BITMASK(uint8_t, , 0x20000301, 0, 7, 1); STORE_BY_BITMASK(uint16_t, , 0x20000302, 0, 0, 15); STORE_BY_BITMASK(uint16_t, , 0x20000303, 0, 7, 1); *(uint8_t*)0x20000304 = 8; *(uint8_t*)0x20000305 = 2; *(uint8_t*)0x20000306 = 0x11; *(uint8_t*)0x20000307 = 0; *(uint8_t*)0x20000308 = 0; *(uint8_t*)0x20000309 = 1; *(uint8_t*)0x2000030a = 8; *(uint8_t*)0x2000030b = 2; *(uint8_t*)0x2000030c = 0x11; *(uint8_t*)0x2000030d = 0; *(uint8_t*)0x2000030e = 0; *(uint8_t*)0x2000030f = 0; *(uint8_t*)0x20000310 = 8; *(uint8_t*)0x20000311 = 2; *(uint8_t*)0x20000312 = 0x11; *(uint8_t*)0x20000313 = 0; *(uint8_t*)0x20000314 = 0; *(uint8_t*)0x20000315 = 0; STORE_BY_BITMASK(uint16_t, , 0x20000316, 0, 0, 4); STORE_BY_BITMASK(uint16_t, , 0x20000316, 0, 4, 12); *(uint64_t*)0x20000318 = 0; *(uint16_t*)0x20000320 = 0x64; *(uint16_t*)0x20000322 = 1; *(uint8_t*)0x20000324 = 0; *(uint8_t*)0x20000325 = 6; memset((void*)0x20000326, 2, 6); *(uint8_t*)0x2000032c = 1; *(uint8_t*)0x2000032d = 0; syz_80211_inject_frame(/*mac_addr=*/0x200002c0, /*buf=*/0x20000300, /*buf_len=*/0x2e); syz_80211_inject_frame(/*mac_addr=*/0, /*buf=*/0, /*buf_len=*/0); syz_80211_inject_frame(/*mac_addr=*/0, /*buf=*/0, /*buf_len=*/0); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; do_sandbox_none(); return 0; }