// https://syzkaller.appspot.com/bug?id=bbbbab42d454f0be114118f3cc73bae015d5fe65 // 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 #include #include #include #ifndef __NR_bpf #define __NR_bpf 321 #endif static unsigned long long procid; static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static 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 void netlink_nest(struct nlmsg* nlmsg, int typ) { struct nlattr* attr = (struct nlattr*)nlmsg->pos; attr->nla_type = typ; nlmsg->pos += sizeof(*attr); nlmsg->nested[nlmsg->nesting++] = attr; } static void netlink_done(struct nlmsg* nlmsg) { struct nlattr* attr = nlmsg->nested[--nlmsg->nesting]; attr->nla_len = nlmsg->pos - (char*)attr; } 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 int netlink_next_msg(struct nlmsg* nlmsg, unsigned int offset, unsigned int total_len) { struct nlmsghdr* hdr = (struct nlmsghdr*)(nlmsg->buf + offset); if (offset == total_len || offset + hdr->nlmsg_len > total_len) return -1; return hdr->nlmsg_len; } static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type, const char* name, bool up) { struct ifinfomsg hdr; memset(&hdr, 0, sizeof(hdr)); if (up) hdr.ifi_flags = hdr.ifi_change = IFF_UP; netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr, sizeof(hdr)); if (name) netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name)); netlink_nest(nlmsg, IFLA_LINKINFO); netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type)); } static void netlink_add_device(struct nlmsg* nlmsg, int sock, const char* type, const char* name) { netlink_add_device_impl(nlmsg, type, name, false); netlink_done(nlmsg); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static void netlink_add_veth(struct nlmsg* nlmsg, int sock, const char* name, const char* peer) { netlink_add_device_impl(nlmsg, "veth", name, false); netlink_nest(nlmsg, IFLA_INFO_DATA); netlink_nest(nlmsg, VETH_INFO_PEER); nlmsg->pos += sizeof(struct ifinfomsg); netlink_attr(nlmsg, IFLA_IFNAME, peer, strlen(peer)); netlink_done(nlmsg); netlink_done(nlmsg); netlink_done(nlmsg); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static void netlink_add_xfrm(struct nlmsg* nlmsg, int sock, const char* name) { netlink_add_device_impl(nlmsg, "xfrm", name, true); netlink_nest(nlmsg, IFLA_INFO_DATA); int if_id = 1; netlink_attr(nlmsg, 2, &if_id, sizeof(if_id)); netlink_done(nlmsg); netlink_done(nlmsg); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static void netlink_add_hsr(struct nlmsg* nlmsg, int sock, const char* name, const char* slave1, const char* slave2) { netlink_add_device_impl(nlmsg, "hsr", name, false); netlink_nest(nlmsg, IFLA_INFO_DATA); int ifindex1 = if_nametoindex(slave1); netlink_attr(nlmsg, IFLA_HSR_SLAVE1, &ifindex1, sizeof(ifindex1)); int ifindex2 = if_nametoindex(slave2); netlink_attr(nlmsg, IFLA_HSR_SLAVE2, &ifindex2, sizeof(ifindex2)); netlink_done(nlmsg); netlink_done(nlmsg); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static void netlink_add_linked(struct nlmsg* nlmsg, int sock, const char* type, const char* name, const char* link) { netlink_add_device_impl(nlmsg, type, name, false); netlink_done(nlmsg); int ifindex = if_nametoindex(link); netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex)); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static void netlink_add_vlan(struct nlmsg* nlmsg, int sock, const char* name, const char* link, uint16_t id, uint16_t proto) { netlink_add_device_impl(nlmsg, "vlan", name, false); netlink_nest(nlmsg, IFLA_INFO_DATA); netlink_attr(nlmsg, IFLA_VLAN_ID, &id, sizeof(id)); netlink_attr(nlmsg, IFLA_VLAN_PROTOCOL, &proto, sizeof(proto)); netlink_done(nlmsg); netlink_done(nlmsg); int ifindex = if_nametoindex(link); netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex)); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static void netlink_add_macvlan(struct nlmsg* nlmsg, int sock, const char* name, const char* link) { netlink_add_device_impl(nlmsg, "macvlan", name, false); netlink_nest(nlmsg, IFLA_INFO_DATA); uint32_t mode = MACVLAN_MODE_BRIDGE; netlink_attr(nlmsg, IFLA_MACVLAN_MODE, &mode, sizeof(mode)); netlink_done(nlmsg); netlink_done(nlmsg); int ifindex = if_nametoindex(link); netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex)); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static void netlink_add_geneve(struct nlmsg* nlmsg, int sock, const char* name, uint32_t vni, struct in_addr* addr4, struct in6_addr* addr6) { netlink_add_device_impl(nlmsg, "geneve", name, false); netlink_nest(nlmsg, IFLA_INFO_DATA); netlink_attr(nlmsg, IFLA_GENEVE_ID, &vni, sizeof(vni)); if (addr4) netlink_attr(nlmsg, IFLA_GENEVE_REMOTE, addr4, sizeof(*addr4)); if (addr6) netlink_attr(nlmsg, IFLA_GENEVE_REMOTE6, addr6, sizeof(*addr6)); netlink_done(nlmsg); netlink_done(nlmsg); int err = netlink_send(nlmsg, sock); if (err < 0) { } } #define IFLA_IPVLAN_FLAGS 2 #define IPVLAN_MODE_L3S 2 #undef IPVLAN_F_VEPA #define IPVLAN_F_VEPA 2 static void netlink_add_ipvlan(struct nlmsg* nlmsg, int sock, const char* name, const char* link, uint16_t mode, uint16_t flags) { netlink_add_device_impl(nlmsg, "ipvlan", name, false); netlink_nest(nlmsg, IFLA_INFO_DATA); netlink_attr(nlmsg, IFLA_IPVLAN_MODE, &mode, sizeof(mode)); netlink_attr(nlmsg, IFLA_IPVLAN_FLAGS, &flags, sizeof(flags)); netlink_done(nlmsg); netlink_done(nlmsg); int ifindex = if_nametoindex(link); netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex)); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static void netlink_device_change(struct nlmsg* nlmsg, int sock, const char* name, bool up, const char* master, const void* mac, int macsize, const char* new_name) { struct ifinfomsg hdr; memset(&hdr, 0, sizeof(hdr)); if (up) hdr.ifi_flags = hdr.ifi_change = IFF_UP; hdr.ifi_index = if_nametoindex(name); netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr)); if (new_name) netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name)); if (master) { int ifindex = if_nametoindex(master); netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex)); } if (macsize) netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static int netlink_add_addr(struct nlmsg* nlmsg, 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(nlmsg, RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr, sizeof(hdr)); netlink_attr(nlmsg, IFA_LOCAL, addr, addrsize); netlink_attr(nlmsg, IFA_ADDRESS, addr, addrsize); return netlink_send(nlmsg, sock); } static void netlink_add_addr4(struct nlmsg* nlmsg, 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(nlmsg, sock, dev, &in_addr, sizeof(in_addr)); if (err < 0) { } } static void netlink_add_addr6(struct nlmsg* nlmsg, 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(nlmsg, sock, dev, &in6_addr, sizeof(in6_addr)); if (err < 0) { } } static void netlink_add_neigh(struct nlmsg* nlmsg, 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(nlmsg, RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr, sizeof(hdr)); netlink_attr(nlmsg, NDA_DST, addr, addrsize); netlink_attr(nlmsg, NDA_LLADDR, mac, macsize); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static struct nlmsg nlmsg; static int tunfd = -1; #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 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 = 200; 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; if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) { exit(1); } 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(&nlmsg, sock, TUN_IFACE, LOCAL_IPV4); netlink_add_addr6(&nlmsg, 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(&nlmsg, 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(&nlmsg, sock, TUN_IFACE, &in6_addr, sizeof(in6_addr), &macaddr, ETH_ALEN); macaddr = LOCAL_MAC; netlink_device_change(&nlmsg, sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN, NULL); close(sock); } #define DEVLINK_FAMILY_NAME "devlink" #define DEVLINK_CMD_PORT_GET 5 #define DEVLINK_ATTR_BUS_NAME 1 #define DEVLINK_ATTR_DEV_NAME 2 #define DEVLINK_ATTR_NETDEV_NAME 7 static struct nlmsg nlmsg2; static void initialize_devlink_ports(const char* bus_name, const char* dev_name, const char* netdev_prefix) { struct genlmsghdr genlhdr; int len, total_len, id, err, offset; uint16_t netdev_index; int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (sock == -1) exit(1); int rtsock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); if (rtsock == -1) exit(1); id = netlink_query_family_id(&nlmsg, sock, DEVLINK_FAMILY_NAME, true); if (id == -1) goto error; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = DEVLINK_CMD_PORT_GET; netlink_init(&nlmsg, id, NLM_F_DUMP, &genlhdr, sizeof(genlhdr)); netlink_attr(&nlmsg, DEVLINK_ATTR_BUS_NAME, bus_name, strlen(bus_name) + 1); netlink_attr(&nlmsg, DEVLINK_ATTR_DEV_NAME, dev_name, strlen(dev_name) + 1); err = netlink_send_ext(&nlmsg, sock, id, &total_len, true); if (err < 0) { goto error; } offset = 0; netdev_index = 0; while ((len = netlink_next_msg(&nlmsg, offset, total_len)) != -1) { struct nlattr* attr = (struct nlattr*)(nlmsg.buf + offset + NLMSG_HDRLEN + NLMSG_ALIGN(sizeof(genlhdr))); for (; (char*)attr < nlmsg.buf + offset + len; attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) { if (attr->nla_type == DEVLINK_ATTR_NETDEV_NAME) { char* port_name; char netdev_name[IFNAMSIZ]; port_name = (char*)(attr + 1); snprintf(netdev_name, sizeof(netdev_name), "%s%d", netdev_prefix, netdev_index); netlink_device_change(&nlmsg2, rtsock, port_name, true, 0, 0, 0, netdev_name); break; } } offset += len; netdev_index++; } error: close(rtsock); close(sock); } #define DEV_IPV4 "172.20.20.%d" #define DEV_IPV6 "fe80::%02x" #define DEV_MAC 0x00aaaaaaaaaa static void netdevsim_add(unsigned int addr, unsigned int port_count) { write_file("/sys/bus/netdevsim/del_device", "%u", addr); if (write_file("/sys/bus/netdevsim/new_device", "%u %u", addr, port_count)) { char buf[32]; snprintf(buf, sizeof(buf), "netdevsim%d", addr); initialize_devlink_ports("netdevsim", buf, "netdevsim"); } } #define WG_GENL_NAME "wireguard" enum wg_cmd { WG_CMD_GET_DEVICE, WG_CMD_SET_DEVICE, }; enum wgdevice_attribute { WGDEVICE_A_UNSPEC, WGDEVICE_A_IFINDEX, WGDEVICE_A_IFNAME, WGDEVICE_A_PRIVATE_KEY, WGDEVICE_A_PUBLIC_KEY, WGDEVICE_A_FLAGS, WGDEVICE_A_LISTEN_PORT, WGDEVICE_A_FWMARK, WGDEVICE_A_PEERS, }; enum wgpeer_attribute { WGPEER_A_UNSPEC, WGPEER_A_PUBLIC_KEY, WGPEER_A_PRESHARED_KEY, WGPEER_A_FLAGS, WGPEER_A_ENDPOINT, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, WGPEER_A_LAST_HANDSHAKE_TIME, WGPEER_A_RX_BYTES, WGPEER_A_TX_BYTES, WGPEER_A_ALLOWEDIPS, WGPEER_A_PROTOCOL_VERSION, }; enum wgallowedip_attribute { WGALLOWEDIP_A_UNSPEC, WGALLOWEDIP_A_FAMILY, WGALLOWEDIP_A_IPADDR, WGALLOWEDIP_A_CIDR_MASK, }; static void netlink_wireguard_setup(void) { const char ifname_a[] = "wg0"; const char ifname_b[] = "wg1"; const char ifname_c[] = "wg2"; const char private_a[] = "\xa0\x5c\xa8\x4f\x6c\x9c\x8e\x38\x53\xe2\xfd\x7a\x70\xae\x0f\xb2\x0f\xa1" "\x52\x60\x0c\xb0\x08\x45\x17\x4f\x08\x07\x6f\x8d\x78\x43"; const char private_b[] = "\xb0\x80\x73\xe8\xd4\x4e\x91\xe3\xda\x92\x2c\x22\x43\x82\x44\xbb\x88\x5c" "\x69\xe2\x69\xc8\xe9\xd8\x35\xb1\x14\x29\x3a\x4d\xdc\x6e"; const char private_c[] = "\xa0\xcb\x87\x9a\x47\xf5\xbc\x64\x4c\x0e\x69\x3f\xa6\xd0\x31\xc7\x4a\x15" "\x53\xb6\xe9\x01\xb9\xff\x2f\x51\x8c\x78\x04\x2f\xb5\x42"; const char public_a[] = "\x97\x5c\x9d\x81\xc9\x83\xc8\x20\x9e\xe7\x81\x25\x4b\x89\x9f\x8e\xd9\x25" "\xae\x9f\x09\x23\xc2\x3c\x62\xf5\x3c\x57\xcd\xbf\x69\x1c"; const char public_b[] = "\xd1\x73\x28\x99\xf6\x11\xcd\x89\x94\x03\x4d\x7f\x41\x3d\xc9\x57\x63\x0e" "\x54\x93\xc2\x85\xac\xa4\x00\x65\xcb\x63\x11\xbe\x69\x6b"; const char public_c[] = "\xf4\x4d\xa3\x67\xa8\x8e\xe6\x56\x4f\x02\x02\x11\x45\x67\x27\x08\x2f\x5c" "\xeb\xee\x8b\x1b\xf5\xeb\x73\x37\x34\x1b\x45\x9b\x39\x22"; const uint16_t listen_a = 20001; const uint16_t listen_b = 20002; const uint16_t listen_c = 20003; const uint16_t af_inet = AF_INET; const uint16_t af_inet6 = AF_INET6; const struct sockaddr_in endpoint_b_v4 = { .sin_family = AF_INET, .sin_port = htons(listen_b), .sin_addr = {htonl(INADDR_LOOPBACK)}}; const struct sockaddr_in endpoint_c_v4 = { .sin_family = AF_INET, .sin_port = htons(listen_c), .sin_addr = {htonl(INADDR_LOOPBACK)}}; struct sockaddr_in6 endpoint_a_v6 = {.sin6_family = AF_INET6, .sin6_port = htons(listen_a)}; endpoint_a_v6.sin6_addr = in6addr_loopback; struct sockaddr_in6 endpoint_c_v6 = {.sin6_family = AF_INET6, .sin6_port = htons(listen_c)}; endpoint_c_v6.sin6_addr = in6addr_loopback; const struct in_addr first_half_v4 = {0}; const struct in_addr second_half_v4 = {(uint32_t)htonl(128 << 24)}; const struct in6_addr first_half_v6 = {{{0}}}; const struct in6_addr second_half_v6 = {{{0x80}}}; const uint8_t half_cidr = 1; const uint16_t persistent_keepalives[] = {1, 3, 7, 9, 14, 19}; struct genlmsghdr genlhdr = {.cmd = WG_CMD_SET_DEVICE, .version = 1}; int sock; int id, err; sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (sock == -1) { return; } id = netlink_query_family_id(&nlmsg, sock, WG_GENL_NAME, true); if (id == -1) goto error; netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_a, strlen(ifname_a) + 1); netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_a, 32); netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_a, 2); netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32); netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4, sizeof(endpoint_b_v4)); netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, &persistent_keepalives[0], 2); netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4, sizeof(first_half_v4)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6, sizeof(first_half_v6)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32); netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v6, sizeof(endpoint_c_v6)); netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, &persistent_keepalives[1], 2); netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4, sizeof(second_half_v4)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6, sizeof(second_half_v6)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_done(&nlmsg); err = netlink_send(&nlmsg, sock); if (err < 0) { } netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_b, strlen(ifname_b) + 1); netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_b, 32); netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_b, 2); netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32); netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6, sizeof(endpoint_a_v6)); netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, &persistent_keepalives[2], 2); netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4, sizeof(first_half_v4)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6, sizeof(first_half_v6)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32); netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v4, sizeof(endpoint_c_v4)); netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, &persistent_keepalives[3], 2); netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4, sizeof(second_half_v4)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6, sizeof(second_half_v6)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_done(&nlmsg); err = netlink_send(&nlmsg, sock); if (err < 0) { } netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_c, strlen(ifname_c) + 1); netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_c, 32); netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_c, 2); netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32); netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6, sizeof(endpoint_a_v6)); netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, &persistent_keepalives[4], 2); netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4, sizeof(first_half_v4)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6, sizeof(first_half_v6)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32); netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4, sizeof(endpoint_b_v4)); netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, &persistent_keepalives[5], 2); netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4, sizeof(second_half_v4)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_nest(&nlmsg, NLA_F_NESTED | 0); netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2); netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6, sizeof(second_half_v6)); netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_done(&nlmsg); netlink_done(&nlmsg); err = netlink_send(&nlmsg, sock); if (err < 0) { } error: close(sock); } static void initialize_netdevices(void) { char netdevsim[16]; sprintf(netdevsim, "netdevsim%d", (int)procid); struct { const char* type; const char* dev; } devtypes[] = { {"ip6gretap", "ip6gretap0"}, {"bridge", "bridge0"}, {"vcan", "vcan0"}, {"bond", "bond0"}, {"team", "team0"}, {"dummy", "dummy0"}, {"nlmon", "nlmon0"}, {"caif", "caif0"}, {"batadv", "batadv0"}, {"vxcan", "vxcan1"}, {"veth", 0}, {"wireguard", "wg0"}, {"wireguard", "wg1"}, {"wireguard", "wg2"}, }; const char* devmasters[] = {"bridge", "bond", "team", "batadv"}; struct { const char* name; int macsize; bool noipv6; } devices[] = { {"lo", ETH_ALEN}, {"sit0", 0}, {"bridge0", ETH_ALEN}, {"vcan0", 0, true}, {"tunl0", 0}, {"gre0", 0}, {"gretap0", ETH_ALEN}, {"ip_vti0", 0}, {"ip6_vti0", 0}, {"ip6tnl0", 0}, {"ip6gre0", 0}, {"ip6gretap0", ETH_ALEN}, {"erspan0", ETH_ALEN}, {"bond0", ETH_ALEN}, {"veth0", ETH_ALEN}, {"veth1", ETH_ALEN}, {"team0", ETH_ALEN}, {"veth0_to_bridge", ETH_ALEN}, {"veth1_to_bridge", ETH_ALEN}, {"veth0_to_bond", ETH_ALEN}, {"veth1_to_bond", ETH_ALEN}, {"veth0_to_team", ETH_ALEN}, {"veth1_to_team", ETH_ALEN}, {"veth0_to_hsr", ETH_ALEN}, {"veth1_to_hsr", ETH_ALEN}, {"hsr0", 0}, {"dummy0", ETH_ALEN}, {"nlmon0", 0}, {"vxcan0", 0, true}, {"vxcan1", 0, true}, {"caif0", ETH_ALEN}, {"batadv0", ETH_ALEN}, {netdevsim, ETH_ALEN}, {"xfrm0", ETH_ALEN}, {"veth0_virt_wifi", ETH_ALEN}, {"veth1_virt_wifi", ETH_ALEN}, {"virt_wifi0", ETH_ALEN}, {"veth0_vlan", ETH_ALEN}, {"veth1_vlan", ETH_ALEN}, {"vlan0", ETH_ALEN}, {"vlan1", ETH_ALEN}, {"macvlan0", ETH_ALEN}, {"macvlan1", ETH_ALEN}, {"ipvlan0", ETH_ALEN}, {"ipvlan1", ETH_ALEN}, {"veth0_macvtap", ETH_ALEN}, {"veth1_macvtap", ETH_ALEN}, {"macvtap0", ETH_ALEN}, {"macsec0", ETH_ALEN}, {"veth0_to_batadv", ETH_ALEN}, {"veth1_to_batadv", ETH_ALEN}, {"batadv_slave_0", ETH_ALEN}, {"batadv_slave_1", ETH_ALEN}, {"geneve0", ETH_ALEN}, {"geneve1", ETH_ALEN}, {"wg0", 0}, {"wg1", 0}, {"wg2", 0}, }; int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); if (sock == -1) exit(1); unsigned i; for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++) netlink_add_device(&nlmsg, sock, devtypes[i].type, devtypes[i].dev); for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) { char master[32], slave0[32], veth0[32], slave1[32], veth1[32]; sprintf(slave0, "%s_slave_0", devmasters[i]); sprintf(veth0, "veth0_to_%s", devmasters[i]); netlink_add_veth(&nlmsg, sock, slave0, veth0); sprintf(slave1, "%s_slave_1", devmasters[i]); sprintf(veth1, "veth1_to_%s", devmasters[i]); netlink_add_veth(&nlmsg, sock, slave1, veth1); sprintf(master, "%s0", devmasters[i]); netlink_device_change(&nlmsg, sock, slave0, false, master, 0, 0, NULL); netlink_device_change(&nlmsg, sock, slave1, false, master, 0, 0, NULL); } netlink_add_xfrm(&nlmsg, sock, "xfrm0"); netlink_device_change(&nlmsg, sock, "bridge_slave_0", true, 0, 0, 0, NULL); netlink_device_change(&nlmsg, sock, "bridge_slave_1", true, 0, 0, 0, NULL); netlink_add_veth(&nlmsg, sock, "hsr_slave_0", "veth0_to_hsr"); netlink_add_veth(&nlmsg, sock, "hsr_slave_1", "veth1_to_hsr"); netlink_add_hsr(&nlmsg, sock, "hsr0", "hsr_slave_0", "hsr_slave_1"); netlink_device_change(&nlmsg, sock, "hsr_slave_0", true, 0, 0, 0, NULL); netlink_device_change(&nlmsg, sock, "hsr_slave_1", true, 0, 0, 0, NULL); netlink_add_veth(&nlmsg, sock, "veth0_virt_wifi", "veth1_virt_wifi"); netlink_add_linked(&nlmsg, sock, "virt_wifi", "virt_wifi0", "veth1_virt_wifi"); netlink_add_veth(&nlmsg, sock, "veth0_vlan", "veth1_vlan"); netlink_add_vlan(&nlmsg, sock, "vlan0", "veth0_vlan", 0, htons(ETH_P_8021Q)); netlink_add_vlan(&nlmsg, sock, "vlan1", "veth0_vlan", 1, htons(ETH_P_8021AD)); netlink_add_macvlan(&nlmsg, sock, "macvlan0", "veth1_vlan"); netlink_add_macvlan(&nlmsg, sock, "macvlan1", "veth1_vlan"); netlink_add_ipvlan(&nlmsg, sock, "ipvlan0", "veth0_vlan", IPVLAN_MODE_L2, 0); netlink_add_ipvlan(&nlmsg, sock, "ipvlan1", "veth0_vlan", IPVLAN_MODE_L3S, IPVLAN_F_VEPA); netlink_add_veth(&nlmsg, sock, "veth0_macvtap", "veth1_macvtap"); netlink_add_linked(&nlmsg, sock, "macvtap", "macvtap0", "veth0_macvtap"); netlink_add_linked(&nlmsg, sock, "macsec", "macsec0", "veth1_macvtap"); char addr[32]; sprintf(addr, DEV_IPV4, 14 + 10); struct in_addr geneve_addr4; if (inet_pton(AF_INET, addr, &geneve_addr4) <= 0) exit(1); struct in6_addr geneve_addr6; if (inet_pton(AF_INET6, "fc00::01", &geneve_addr6) <= 0) exit(1); netlink_add_geneve(&nlmsg, sock, "geneve0", 0, &geneve_addr4, 0); netlink_add_geneve(&nlmsg, sock, "geneve1", 1, 0, &geneve_addr6); netdevsim_add((int)procid, 4); netlink_wireguard_setup(); for (i = 0; i < sizeof(devices) / (sizeof(devices[0])); i++) { char addr[32]; sprintf(addr, DEV_IPV4, i + 10); netlink_add_addr4(&nlmsg, sock, devices[i].name, addr); if (!devices[i].noipv6) { sprintf(addr, DEV_IPV6, i + 10); netlink_add_addr6(&nlmsg, sock, devices[i].name, addr); } uint64_t macaddr = DEV_MAC + ((i + 10ull) << 40); netlink_device_change(&nlmsg, sock, devices[i].name, true, 0, &macaddr, devices[i].macsize, NULL); } close(sock); } static void initialize_netdevices_init(void) { int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); if (sock == -1) exit(1); struct { const char* type; int macsize; bool noipv6; bool noup; } devtypes[] = { {"nr", 7, true}, {"rose", 5, true, true}, }; unsigned i; for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++) { char dev[32], addr[32]; sprintf(dev, "%s%d", devtypes[i].type, (int)procid); sprintf(addr, "172.30.%d.%d", i, (int)procid + 1); netlink_add_addr4(&nlmsg, sock, dev, addr); if (!devtypes[i].noipv6) { sprintf(addr, "fe88::%02x:%02x", i, (int)procid + 1); netlink_add_addr6(&nlmsg, sock, dev, addr); } int macsize = devtypes[i].macsize; uint64_t macaddr = 0xbbbbbb + ((unsigned long long)i << (8 * (macsize - 2))) + (procid << (8 * (macsize - 1))); netlink_device_change(&nlmsg, sock, dev, !devtypes[i].noup, 0, &macaddr, macsize, NULL); } 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 || errno == EBADF || errno == EBADFD) return -1; exit(1); } return rv; } static void flush_tun() { char data[1000]; while (read_tun(&data[0], sizeof(data)) != -1) { } } #define MAX_FDS 30 static void mount_cgroups(const char* dir, const char** controllers, int count) { if (mkdir(dir, 0777)) { return; } char enabled[128] = {0}; int i = 0; for (; i < count; i++) { if (mount("none", dir, "cgroup", 0, controllers[i])) { continue; } umount(dir); strcat(enabled, ","); strcat(enabled, controllers[i]); } if (enabled[0] == 0) { if (rmdir(dir) && errno != EBUSY) exit(1); return; } if (mount("none", dir, "cgroup", 0, enabled + 1)) { if (rmdir(dir) && errno != EBUSY) exit(1); } if (chmod(dir, 0777)) { } } static void mount_cgroups2(const char** controllers, int count) { if (mkdir("/syzcgroup/unified", 0777)) { return; } if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) { if (rmdir("/syzcgroup/unified") && errno != EBUSY) exit(1); return; } if (chmod("/syzcgroup/unified", 0777)) { } int control = open("/syzcgroup/unified/cgroup.subtree_control", O_WRONLY); if (control == -1) return; int i; for (i = 0; i < count; i++) if (write(control, controllers[i], strlen(controllers[i])) < 0) { } close(control); } static void setup_cgroups() { const char* unified_controllers[] = {"+cpu", "+io", "+pids"}; const char* net_controllers[] = {"net", "net_prio", "devices", "blkio", "freezer"}; const char* cpu_controllers[] = {"cpuset", "cpuacct", "hugetlb", "rlimit", "memory"}; if (mkdir("/syzcgroup", 0777)) { return; } mount_cgroups2(unified_controllers, sizeof(unified_controllers) / sizeof(unified_controllers[0])); mount_cgroups("/syzcgroup/net", net_controllers, sizeof(net_controllers) / sizeof(net_controllers[0])); mount_cgroups("/syzcgroup/cpu", cpu_controllers, sizeof(cpu_controllers) / sizeof(cpu_controllers[0])); write_file("/syzcgroup/cpu/cgroup.clone_children", "1"); write_file("/syzcgroup/cpu/cpuset.memory_pressure_enabled", "1"); } static void setup_cgroups_loop() { int pid = getpid(); char file[128]; char cgroupdir[64]; snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid); if (mkdir(cgroupdir, 0777)) { } snprintf(file, sizeof(file), "%s/pids.max", cgroupdir); write_file(file, "32"); snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir); 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); write_file(file, "%d", pid); snprintf(file, sizeof(file), "%s/memory.soft_limit_in_bytes", cgroupdir); write_file(file, "%d", 299 << 20); snprintf(file, sizeof(file), "%s/memory.limit_in_bytes", cgroupdir); write_file(file, "%d", 300 << 20); snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid); if (mkdir(cgroupdir, 0777)) { } snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir); write_file(file, "%d", pid); } static void setup_cgroups_test() { 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")) { } } static void setup_common() { 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)) { } } static void loop(); static void sandbox_common() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); 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 = 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); setup_common(); sandbox_common(); drop_caps(); initialize_netdevices_init(); if (unshare(CLONE_NEWNET)) { } write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535"); initialize_tun(); initialize_netdevices(); setup_binderfs(); loop(); exit(1); } #define FS_IOC_SETFLAGS _IOW('f', 2, long) static void remove_dir(const char* dir) { int iter = 0; DIR* dp = 0; retry: const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW; while (umount2(dir, umount_flags) == 0) { } dp = opendir(dir); if (dp == NULL) { if (errno == EMFILE) { exit(1); } exit(1); } struct dirent* ep = 0; 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, umount_flags) == 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, umount_flags)) exit(1); } } closedir(dp); for (int 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, umount_flags)) 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); 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_loop() { setup_cgroups_loop(); } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); setup_cgroups_test(); write_file("/proc/self/oom_score_adj", "1000"); flush_tun(); if (symlink("/dev/binderfs", "./binderfs")) { } } static void close_fds() { for (int fd = 3; fd < MAX_FDS; fd++) close(fd); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { setup_loop(); int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); setup_test(); execute_one(); close_fds(); 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 < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[1] = {0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; *(uint32_t*)0x20000200 = 0xc; *(uint32_t*)0x20000204 = 0xe; *(uint64_t*)0x20000208 = 0x200028c0; memcpy( (void*)0x200028c0, "\xb7\x02\x00\x00\x0d\x00\x00\x00\xbf\xa3\x00\x00\x00\x00\x00\x00\x07\x03" "\x00\x00\x00\xfe\xff\xff\x7a\x0a\xf0\xff\x01\x00\x00\x00\x79\xa4\xf0\xff" "\x00\x00\x00\x00\xb7\x06\x00\x00\xff\xff\xff\xff\x2d\x64\x05\x00\x00\x00" "\x00\x00\x65\x04\x04\x00\x01\x00\x00\x00\x04\x04\x00\x00\x01\x00\x7d\x60" "\xb7\x03\x00\x00\x00\x00\x00\x00\x6a\x0a\x00\xfe\x00\x00\x00\x00\x85\x00" "\x00\x00\x0d\x00\x00\x00\xb7\x00\x00\x00\x00\x00\x00\x00\x95\x00\x00\x00" "\x00\x00\x00\x00\x5e\xce\xfa\xb8\xf2\xe8\x5c\x6c\x1c\xa7\x11\xfc\xd0\xcd" "\xfa\x14\x6e\xc5\x61\x75\x03\x79\x58\x5e\x5a\x07\x6d\x83\x92\x40\xd2\x9c" "\x03\x40\x55\xb6\x7d\xaf\xe6\xc8\xdc\x3d\x5d\x78\xc0\x7f\xa1\xf7\xe6\x55" "\xce\x34\xe4\xd5\xb3\x18\x5f\xec\x0e\x07\x00\x4e\x60\xc0\x8d\xc8\xb8\xdb" "\xf1\x1e\x6e\x94\xd7\x59\x38\x32\x1a\x3a\xa5\x02\xcd\x24\x24\xa6\x6e\x6d" "\x2e\xf8\x31\xab\x7e\xa0\xc3\x4f\x17\xe3\x94\x6e\xf3\xbb\x62\x2e\x03\xb5" "\x38\xdf\xd8\xe0\x12\xe7\x95\x78\xe5\x1b\xc5\x30\x99\xe9\x0f\x45\x80\xd7" "\x60\x55\x1b\x5b\x34\x1a\x29\xf3\x1e\x31\x06\xd1\xdd\xd6\x15\x2f\x7c\xbd" "\xb9\xcd\x38\xbd\xb2\x20\x9c\x67\xde\xca\x8e\xeb\x9c\x15\xab\x3a\x14\x81" "\x7a\xc6\x1e\x4d\xd1\x11\x83\xa1\x34\x77\xbf\x7e\x86\x0e\x36\x70\xef\x0e" "\x78\x9f\x65\xf1\x32\x8d\x67\x04\x90\x2c\xbe\x7b\xc0\x4b\x82\xd2\x78\x9c" "\xb1\x32\xb8\x66\x7c\x21\x47\x66\x1d\xf2\x8d\x99\x61\xb6\x3e\x1a\x9c\xf6" "\xc2\xa6\x60\xa1\xfe\x3c\x18\x4b\x75\x1c\x51\x16\x0f\xb2\x0b\x1c\x69\x02" "\x20\xb8\x7b\x20\x58\x1e\x7b\xe6\xba\x0d\xc0\x01\xc4\x11\x05\x55\x85\x09" "\x15\x14\x8b\xa5\x32\xe6\xad\x30\xc3\x46\xdf\xeb\xd3\x86\x08\xb3\x28\x00" "\x80\x00\x5d\x9a\x95\x00\x00\x00\x00\x00\x00\x00\x33\x4d\x83\x23\x9d\xd2" "\x70\x80\x85\x1d\xca\xc3\xc1\x22\x33\xf9\xa1\xfb\x9c\x2a\xec\x61\xce\x63" "\xa3\x8d\x2f\xd5\x01\x17\xb8\x9a\x9a\xb3\x59\xb4\xee\xa0\xc6\xe9\x57\x67" "\xd4\x2b\x4e\x54\x86\x1d\x02\x27\xdb\xfd\x2e\x6d\x7f\x71\x5a\x7f\x3d\xea" "\xdd\x71\x30\x89\x85\x6f\x75\x64\x36\x30\x37\x67\xd2\xe2\x4f\x29\xe5\xda" "\xd9\x79\x6e\xdb\x69\x7a\xee\xa0\x18\x2b\xab\xd1\x8c\xac\x1b\xd4\xf4\x39" "\x0a\xf9\xa9\xce\xaf\xd0\x00\x2c\xab\x15\x4a\xd0\x29\xa1\x09\x00\x00\x00" "\x27\x80\x87\x00\x14\xf5\x1c\x3c\x97\x5d\x5a\xec\x84\x22\x2f\xd3\xa0\xec" "\x4b\xe3\xe5\x63\x11\x2f\x0b\x39\x50\x1a\xaf\xe2\x34\x87\x00\x72\x85\x8d" "\xc0\x6e\x7c\x33\x76\x42\xd3\xe5\xa8\x15\x23\x2f\x5e\x16\xc1\xb3\x0c\x3a" "\x6a\x71\xbc\x85\x01\x8e\x5f\xf2\x2d\xc5\x18\xaf\xc9\xff\xc2\xcc\x78\x8b" "\xee\x1b\x47\x68\x3d\xb0\x1a\x46\x93\x98\x68\x52\x11\xdf\xbb\xae\x3e\x2e" "\xd0\xa5\x0e\x73\x13\xbf\xf5\xd4\xc3\x91\xdd\xec\xe0\x0f\xc7\x72\xdd\x6b" "\x4d\x4d\xe2\xa4\x19\x90\xf0\x5c\xa3\xbd\xfc\x92\xc8\x8c\x5b\x8d\xcd\x36" "\xe7\x48\x7a\xfa\x44\x7e\x2e\xdf\xae\x4f\x39\x0a\x83\x37\x84\x1c\xef\x38" "\x6e\x22\xcc\x22\xee\x17\x47\x6d\x73\x89\x52\x22\x96\x82\xe2\x4b\x92\x53" "\x3a\xc2\xa9\xf5\xa6\x99\x59\x3f\x08\x44\x19\xca\xe0\xb4\x53\x2b\xcc\x97" "\xd3\xae\x52\x6a\xca\x54\x18\x3f\xb0\x1c\x73\xf9\x79\xca\x98\x57\x39\x95" "\x37\xf5\x83\x18\x08\xb0\xdc\x2a\x2d\x0e\x00\x00\x00\x00\x00\x00\x05\x78" "\x67\x3f\x8b\x6e\x74\xce\x23\x87\x7a\x6b\x24\xdb\x0e\x06\x73\x45\x56\x09" "\x42\xfa\x62\x9f\xbe\xf2\x46\x1c\x96\xa0\x88\xa2\x2e\x8b\x15\xc3\xe2\x33" "\xdb\x00\x00\x2e\x30\xd4\x6a\x9d\x24\xd3\x7c\xef\x09\x9e\xce\x72\x9a\xa2" "\x18\xf9\xf4\x4a\x32\x10\x22\x3f\xda\xe7\xed\x04\x93\x5c\x3c\x90\xd3\xad" "\xd8\xee\xbc\x86\x19\xd7\x34\x15\xcd\xa2\x13\x0f\x50\x11\xe4\x84\x55\x35" "\xa8\xb9\x0d\xfa\xe1\x58\xb9\x4f\x50\xad\xab\x98\x8d\xd8\xe1\x2b\xaf\x5c" "\xc9\x39\x8f\xff\x00\x40\x4d\x5d\x99\xf8\x2e\x20\xee\x6a\x8c\x88\xe1\x8c" "\x29\x77\xaa\xb3\x7d\x9a\xc4\xcf\xc1\xc7\xb4\x00\x00\x00\x00\x00\x00\x07" "\xff\x57\xc3\x94\x95\xc8\x26\xb9\x56\xba\x85\x9a\xc8\xe3\xc1\x77\xb9\x1b" "\xd7\xd5\xe4\x1f\xf8\x68\xf7\xca\x16\x64\xfe\x2f\x3c\xed\x84\x68\x91\x18" "\x06\x04\xb6\xdd\x24\x99\xd1\x6d\x7d\x91\x58\xff\xff\xff\xff\x00\x00\x00" "\x00\xef\x06\x9d\xc4\x27\x49\xa8\x9f\x85\x47\x97\xf2\x9d\x00\x00\x00\x2d" "\x8c\x38\xa9\x67\xc1\xbb\xe0\x93\x15\xc2\x98\x77\xa3\x08\xbc\xc8\x7d\xc3" "\xad\xdb\x08\x14\x1b\xde\xe5\xd2\x78\x74\xb2\xf6\x63\xdd\xee\xf0\x00\x5b" "\x3d\x96\xc7\xaa\xbf\x4d\xf5\x17\xd9\x0b\xdc\x01\xe7\x38\x35\xd5\xa3\xe1" "\xa9\x08\x00\xc6\x6e\xe2\xb1\xad\x76\xdf\xf9\xf9\x00\x3f\x07\x00\x00\x99" "\xd4\x89\x4e\xe7\xf8\x24\x9d\xc1\xe3\x42\x8d\x21\x29\x36\x9e\xe1\xb8\x26" "\x14\xb2\x55\x0b\xae\x87\x8e\xc6\x5a\x6f\xe5\xf7\xee\x41\x5a\xf6\xeb\x2e" "\xea\x0d\x0d\xf4\x14\xb3\x15\xf6\x51\xc8\x41\x23\x92\x19\x1f\xa8\x3e\xe8" "\x30\x54\x8f\x11\xe1\x03\x6a\x8d\xeb\xd6\x4c\xbe\x35\x94\x54\xa3\xf2\x23" "\x9c\xfe\x35\xf8\x1b\x7a\x49\x0f\x16\x7e\x6d\x5c\x11\x09\x00\x00\x00\x00" "\x00\x00\x00\x00\x42\xb8\xff\x8c\x21\xad\x70\x2c\xca\xca\xd5\xb3\x9e\xef" "\x21\x3d\x1c\xa2\x96\xd2\xa2\x77\x98\xc8\xce\x2a\x30\x5c\x0c\x7d\x35\xcf" "\x4b\x22\x54\x9a\x4b\xd9\x20\x52\x18\x8b\xd1\xf2\x85\xf6\x53\xb6\x21\x49" "\x1d\xc6\xaa\xee\x02\x00\xe2\xff\x08\x64\x4f\xb9\x4c\x06\x00\x6e\xff\x1b" "\xe2\xf6\x33\xc1\xd9\x87\x59\x1e\xc3\xdb\x58\xa7\xbb\x30\x42\xec\x3f\x77" "\x1f\x7a\x13\x38\xa5\xc3\xdd\x7f\xe9\x26\x04\x9f\xe8\x6e\x09\xc5\x8e\x27" "\x3c\xd9\x05\xde\xb2\x8c\x13\xc1\xed\x1c\x0d\x9c\xae\x84\x6b\x3e\x57\x8a" "\xf7\xdc\x7d\x5e\x87\xd4\x4f\xf8\x28\xde\x45\x3f\x7e\xdf\x34\xc2\xb1\x86" "\x60\xb0\x80\xef\xc7\x07\xe6\x76\xe1\xfb\x4d\x58\x25\xc0\xca\x17\x7a\x4c" "\x7f\xbb\x4e\xda\x05\x45\xc0\x0f\x57\x6b\x2b\x5c\xc7\xf8\x19\xab\xd0\xf8" "\x85\xcc\x48\x06\xf4\x03\x00\x96\x6f\xcf\x1e\x54\xf5\xa2\xd3\x87\x08\x29" "\x4c\xd6\xf4\x96\xe5\xde\xe7\x34\xfe\x7d\xa3\x77\x08\x45\xcf\x44\x2d\x48" "\x8a\xfd\x80\xe1\x70\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x52\x05\x00\x00\x00" "\xdc\x1c\x56\xd5\x9f\x35\xd3\x67\x63\x29\x52\xa9\x34\x66\xae\x59\x5c\x6a" "\x8c\xda\x69\x0d\x19\x2a\x07\x08\x86\xdf\x42\xb2\x70\x98\x77\x3b\x45\x19" "\x8b\x4a\x34\xac\x97\x7e\xbd\x44\x50\xe1\x21\xd0\x13\x42\x70\x3f\x5b\xf0" "\x30\xe9\x35\x87\x8a\x6d\x16\x9c\x80\xaa\x42\x52\xd4\xea\x6b\x8f\x62\x16" "\xff\x20\x2b\x5b\x5a\x18\x2c\xb5\xe8\x38\xb3\x07\x63\x2d\x03\xa7\xca\x6f" "\x6d\x03\x39\xf9\x95\x3c\x30\x93\xc3\x69\x0d\x10\xec\xb6\x5d\xc5\xb4\x74" "\x81\xed\xbf\x1f\x00\x00\x00\x00\x00\x00\x00\x4d\x16\xd2\x9c\x28\xeb\x51" "\x67\xe9\x93\x6e\xd3\x27\xfb\x23\x7a\x56\x22\x4e\x49\xd9\xea\x95\x5a\x5f" "\x0d\xec\x1b\x3c\xcd\x35\x36\x46\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xee\xff\xff\xff" "\x00\x00\x26\xde\xd4\xdd\x6f\xe1\x51\x8c\xc7\x80\x20\x43\xec\xfe\x69\xf7" "\x43\xf1\x21\x3b\xf8\x17\x9e\xcd\x9e\x5a\x22\x5d\x67\x52\x1d\xc7\x28\xea" "\xc7\xd8\x0a\x56\x56\xac\x2c\xbd\xe2\x1d\x3e\xbf\xbf\x69\xff\x86\x1f\x43" "\x94\x83\x6d\xdf\x12\x8d\x6d\x19\x07\x9e\x64\x33\x6e\x7c\x67\x65\x05\xc7" "\x8a\xd6\x75\x48\xf4\xb1\x92\xbe\x18\x27\xfc\xd9\x5c\xf1\x07\x75\x3c\xb0" "\xa6\xa9\x79\xd3\xdb\x0c\x40\x70\x81\xc6\x28\x1e\x2d\x84\x29\xa8\x63\x90" "\x34\xa7\x5f\x4c\x7d\xf3\xea\x8f\xc2\x01\x8d\x07\xaf\x14\x91\xef\x06\x0c" "\xd4\x40\x3a\x09\x9f\x32\x46\x8f\x65\xbd\x06\xb4\x08\x2d\x43\xe1\x21\x86" "\x1b\x5c\xc0\x3f\x1a\x15\x61\xf0\x58\x9e\x0d\x12\x96\x9b\xc9\x82\xff\x5d" "\x8e\x9b\x98\x6c\x0c\x6c\x74\x7d\x9a\x1c\xc5\x00\xbb\x89\x2c\x3a\x16\xff" "\x10\xfe\xea\x20\xbd\xac\x00\x00\x00\x00\x00\x00\x00\x00\xca\x06\xf2\x56" "\xc8\x02\x8e\x0f\x9b\x65\xf0\x37\xb2\x1f\x32\x89\xf8\x6a\x68\x26\xc6\x9f" "\xa3\x5b\xa5\xcb\xc3\xf2\xdb\x15\x16\xff\xc5\xc6\xe3\xfa\x61\x8b\x24\xa6" "\xce\x16\xd6\xc7\x01\x0b\xb3\x7b\x61\xfa\x0a\x2d\x89\x74\xe6\x91\x15\xd3" "\x33\x94\xe8\x6e\x4b\x83\x82\x97\xba\x20\xf9\x69\x36\xb7\xe4\x74\x6e\x92" "\xde\xa6\xc5\xd1\xd3\x3d\x84\xd9\x6b\x50\xfb\x00\x00\x00\xae\x07\xc6\x5b" "\x71\x08\x8d\xd7\xd5\xd1\xe1\xba\xb9\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\xb5\xac\xe2\x93\xbe\xc8\x33\xc1\x3e\x32\x29\x43\x2a\xd7\x1d" "\x64\x62\x18\xb5\x22\x9d\xd8\x81\x37\xfc\x7c\x59\xaa\x24\x2a\xf3\xbb\x4e" "\xfb\x82\x05\x5a\x3b\x61\x22\x7a\xd4\x0f\x52\xc9\xf2\x50\x05\x79\xac\xa1" "\x10\x33\xbb\x9c\xc1\x6b\xd8\x3a\x00\x84\x0e\x31\xd8\x28\xec\x78\xe1\x16" "\xae\x46\xc4\x89\x7e\x27\x95\xb6\xff\x92\xe9\xa1\xe2\x4b\x0b\x85\x5c\x02" "\xf2\xb7\xad\xd5\x8f\xfb\x25\xf3\x39\x29\x77\x29\xa7\xa5\x18\x10\x13\x4d" "\x3d\xfb\xf7\x1f\x65\x16\x73\x7b\xe5\x5c\x06\xd9\xcd\xcf\xb1\xe2\xbb\x10" "\xb5\x00\x00\xeb\x4a\xcf\xf9\x07\x56\xdb\xa1\xec\xf9\xf5\x8a\xfd\x3c\x19" "\xb5\xc4\x55\x8b\xa9\xaf\x6b\x73\x33\xc8\x94\xa1\xfb\x29\xad\xe9\xad\x75" "\xc9\xc0\x22\xe8\xd0\x3f\xe2\x8b\xc3\x58\x68\x44\x92\xaa\x77\x1d\xbf\xe8" "\x07\x45\xfe\x89\xad\x34\x9f\xfa\xad\x76\xff\x9d\xd6\x43\x79\x6c\xaf\xfd" "\xf6\x7a\xf5\xdd\x47\x6c\x37\xc5\x3c\xb5\x7f\xf9\xd5\x7a\xc4\x1a\xfb\x92" "\xa9\xd1\x3e\x5d\xe7\xe9\xa8\x4e\x2e\x5d\xa2\x69\x6e\x28\x5a\x59\xb5\x3f" "\x2f\xb0\xe1\x6d\x82\x62\xc0\x80\xc1\x59\xce\x1d\x9b\xc7\xef\x3e\x3f\x40" "\xc1\x40\x89\xc8\x27\x59\x10\x6f\x42\x25\x82\xb4\x2e\x3e\x84\x84\xea\x5a" "\x6a\xd9\xaa\x52\x10\x6e\xaf\xe0\xe0\xca\xea\x1a\xd4\xcb\x23\xf3\xc2\xb8" "\xa0\xf4\x55\xba\x69\xea\x28\x4c\x26\x8d\x54\xb4\x31\x58\xa8\xb1\xd1\x28" "\xd0\x2a\xf2\x63\xb3\xdc\x1c\xab\x79\x4c\x9a\xc5\x7a\x2a\x73\x32\xf4\xd8" "\x76\x4c\x30\x2c\xcd\x5a\xac\x11\x44\x82\xb6\x19\xfc\x57\x5a\xa0\xdd\x27" "\x77\xe8\x81\xe2\x9a\x85\x43\x80\xe2\xf1\xe4\x9d\xb5\xa1\x51\x7e\xc4\x0b" "\xb3\xfa\x44\xf9\x95\x9b\xad\x67\xcc\xab\xa7\x64\x08\xda\x35\xc9\xf1\x53" "\x4c\x8b\xd4\x8b\xbd\x61\x62\x7a\x2e\x0a\x74\xb5\xe6\xae\xfb\x7e\xee\x40" "\x35\x02\x73\x41\x37\xff\x47\x25\x7f\x16\x43\x91\xc6\x73\xb6\x07\x9e\x65" "\xd7\x29\x5e\xed\x16\x4c\xa6\x3e\x4e\xa2\x6d\xce\x0f\xb3\xce\x0f\x65\x91" "\xd8\x0d\xfb\x8f\x38\x6b\xb7\x4b\x55\x89\x82\x9b\x6b\x06\x79\xb5\xd6\xfc" "\xcb\xec\xfa\xe5\x55\x3d\x99\x50\xd4\x8c\x77\x4e\xaa\x35\xb2\x4f\xce\x69" "\xa2\x0d\x8b\xc4\x10\xd9\xf4\x8b\xf7\xea\xc9\x05\x29\xcd\x6a\xf0\x61\xc9" "\xe5\x3a\xdd\xdd\xc6\x20\xce\x73\xc5\xd1\x77\xe3\xd0\x97\x15\x9f\x27\x68" "\x63\x6f\xc1\x02\x76\xc6\xa0\xad\xc5\x74\x83\xb3\xf7\x08\x3f\x66\xb8\x7e" "\xf2\x96\xee\x85\xe9\xbb\x70\xa3\x00\x9a\x5d\x30\xf4\x79\xe2\x93\xa3\x30" "\x2e\x11\x35\x0e\xa8\x57\xb3\x7e\x76\xca\x2f\x50\x37\x8e\x40\x92\xce\x2c" "\x57\x4a\xd2\x78\xb9\xb7\xb7\x17\xc5\x71\xaf\xb2\x07\x7b\x01\x9f\xd9\xd8" "\x9e\xfd\x59\xb4\x1f\x05\x1e\xc5\xa8\xff\x87\xec\xc8\xdf\x91\x7a\x1e\x38" "\x6d\x84\x9f\xcd\x10\xe2\xf9\xca\x52\xe0\x23\x39\xc2\xf4\x66\x6b\x0c\x54" "\x5e\x25\xf1\xcd\x62\x42\x1c\x28\xd2\x59\x94\xbe\x0c\xff\x72\x71\xa0\xde" "\xe3\x8d\x7a\xc4\xac\x73\x6b\x09\x0e\x1d\x29\xf9\x81\x17\x91\x86\xe4\x00" "\x00\x00\x00\x00\x00\x64\x61\x74\xb5\x5d\x25\x1f\x7f\x8c\xa5\xcc\xc2\x2a" "\x5e\xfb\x33\xb2\x37\xef\xf5\x59\x7a\x3c\x3a\x5f\x3a\x9b\xb5\x4a\xbb\x40" "\xe5\x45\x93\xe1\xa7\xce\x4c\xfa\x17\xb3\xc3\xfe\x91\xc0\x63\x63\x49\x63" "\x41\xea\xe2\x0d\xcc\x59\xb6\x17\x9b\x32\xdd\xdd\xef\x5c\x34\x00\x00\x96" "\xa5\x4c\x0c\x57\x1a\x91\x87\x8f\x61\xf7\x49\x12\xe2\x29\x9e\x55\x01\xd4" "\xd6\x94\x3b\xfd\x74\xc8\x56\x51\x17\x26\xf0\xac\x8f\x7d\x17\xf1\xc6\xb4" "\x45\x1c\x1b\xcd\xc6\xb6\xe1\x70\x0e\x4c\xd8\x77\x09\xd9\x7a\xfc\x54\x23" "\xc9\x6f\xa9\x81\x87\x3d\x43\x69\xb0\x4b\xbf\x1f\xb9\xf6\x8f\x17\x99\x15" "\x40\x86\x8e\x40\x82\x01\xad\x1a\x74\x17\x9e\x48\x9a\x26\x1f\x02\x1a\x43" "\x7a\x3f\xa9\x35\x58\x8b\xe2\x06\x8f\x7f\xf9\xb2\x53\x10\x63\x26\xfd\xe7" "\x95\xe5\x30\xb9\x36\x26\xcc\x68\xe0\x6e\x60\x21\x98\x72\x42\x49\xb4\x44" "\x5e\xef\x08\x40\x1c\xd1\xa3\xe2\x66\xdb\x55\x47\x4e\x69\x90\x2e\x4d\x8f" "\x5d\xa4\xe9\x4c\xc3\x67\x94\x25\x8f\xd4\x03\x2d\xe7\xab\x36\xbc\x24\xc5" "\xef\xd5\xc8\x49\x5c\x1c\xcd\x58\x00\x33\xc5\x57\x25\xf2\xd6\x03\x54\xf8" "\xad\x59\x14\xa0\x15\x5e\xaa\x74\x33\x50\xdd\xb3\x88\xf4\x86\xb6\xde\x05" "\x49\xef\x3b\x1b\x3c\x3b\x7d\x4d\x3a\x83\x0f\xf3\x98\x85\x77\x61\x19\x40" "\x80\x29\xbe\x37\x88\xdd\x84\x22\xb1\xab\x7b\x4c\x9d\x5b\x7d\x86\x82\xfd" "\x75\x9c\x71\x31\x08\xe1\x38\x6f\x58\xc5\xee\xab\x6d\xac\x28\x77\x22\x5e" "\x90\x99\x55\x54\xe9\x2c\xb5\xd2\xf6\xaf\x1f\x70\x18\x80\x27\x77\x3d\x82" "\xe5\xf4\x3d\x0d\xbc\x60\xfd\x3d\xc8\x76\x3c\x3a\xa8\x84\xe7\xa3\xd0\x64" "\x96\x38\x4e\x17\x9b\xe0\x04\xe5\x61\x76\xdf\xc6\x4f\xe5\xb1\xb0\xe6\xed" "\xe3\x25\x27\xd6\xbe\xd6\x22\x5d\x9b\x6e\xfe\x63\xb3\x79\x8f\x86\x06\xab" "\x2e\x5b\x50\xa1\x5f\xd6\x6f\x54\xd4\x9a\xc9\xea\xeb\x79\xdd\x87\xec\x00" "\x00\x00\x00\x00\x00", 2903); *(uint64_t*)0x20000210 = 0x20000340; memcpy((void*)0x20000340, "syzkaller\000", 10); *(uint32_t*)0x20000218 = 0; *(uint32_t*)0x2000021c = 0; *(uint64_t*)0x20000220 = 0; *(uint32_t*)0x20000228 = 0; *(uint32_t*)0x2000022c = 0; memset((void*)0x20000230, 0, 16); *(uint32_t*)0x20000240 = 0; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = -1; *(uint32_t*)0x2000024c = 8; *(uint64_t*)0x20000250 = 0; *(uint32_t*)0x20000258 = 0; *(uint32_t*)0x2000025c = 0x10; *(uint64_t*)0x20000260 = 0; *(uint32_t*)0x20000268 = 0; *(uint32_t*)0x2000026c = 0; *(uint32_t*)0x20000270 = -1; *(uint32_t*)0x20000274 = 0; *(uint64_t*)0x20000278 = 0; *(uint64_t*)0x20000280 = 0; *(uint32_t*)0x20000288 = 0x10; *(uint32_t*)0x2000028c = 0; res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000200ul, /*size=*/0x48ul); if (res != -1) r[0] = res; *(uint32_t*)0x20000080 = r[0]; *(uint32_t*)0x20000084 = 0x2a0; *(uint32_t*)0x20000088 = 0x10; *(uint32_t*)0x2000008c = 0x60000000; *(uint64_t*)0x20000090 = 0x20000100; memcpy((void*)0x20000100, "\xb9\xff\x03\x07\x68\x44\x26\x8c\xb8\x9e\x14\xf0\x88\xa8\x47\xe0\x43" "\x05\x00\x0f\x40\x00\x63\x11\x77\xfb\x08\x06\x14\x45\xe0\x00\x03\x03" "\x94\x02\x9f\x03\x4d\x2f\x87\xe5\x89\xca\x6a\xab\x84\x50\x13\xf2\x86" "\xdd\x1a\x39\x01\x05\x0b\x03\x8d\xa1\x88\x0b\x25\x18\x1a\xa5\x9d\x94" "\x3b\xe3\xf4\xae\xd5\x0e\xa5\xa6\xb8\x68\x67\x31\xcb\x89\xef\x77\x12" "\x3c\x89\x9b\x69\x9e\xea\xa8\xea\xa0\x07\x34\x61\x11\x96\x63\x90\x64" "\x00\xf3\x0c\x06\x00\x00\x00\x00\x00\x00\x59\xb6\xd3\x29\x6e\x8c\xa3" "\x1b\xce\x1d\x83\x92\x07\x8b\x72\xf2\x49\x96\xae\x17\xdf\xfc\x2e\x43" "\xc8\x17\x4b\x54\xb6\x20\x63\x68\x94\xaa\xac\xf2\x8f\xf6\x26\x16\x36" "\x3c\x70\xa4\x40\xae\xc4\x01\x4c\xaf\x28\xc0\xad\xc0\x43\x08\x46\x17" "\xd7\xec\xf4\x1e\x9d\x13\x45\x89\xd4\x6e\x5d\xfc\x4c\xa5\x78\x0d\x38" "\xca\xe8\x70\xb9\xa1\xdf\x48\xb2\x38\x19\x0d\xa4\x50\x29\x6b\x0a\xc0" "\x14\x96\xac\xe2\x3e\xef\xc9\xd4\x24\x6d\xd1\x4a\xfb\xf7\x9a\x22\x83" "\xa0\xbb\x7e\x1d\x23\x5f\x3d\xf1\x26\xc3\xac\xc2\x40\xd7\x5a\x05\x8f" "\x6e\xfa\x6d\x1f\x5f\x7f\xf4\x00\x00\x00\x00\x00\x00\x00\x00\x00", 254); *(uint64_t*)0x20000098 = 0; *(uint32_t*)0x200000a0 = 0xfe; *(uint32_t*)0x200000a4 = 0x60000e1e; *(uint32_t*)0x200000a8 = 0; *(uint32_t*)0x200000ac = 0x60e; *(uint64_t*)0x200000b0 = 0x20000000; *(uint64_t*)0x200000b8 = 0x20000000; *(uint32_t*)0x200000c0 = 0; *(uint32_t*)0x200000c4 = 0; *(uint32_t*)0x200000c8 = 0; syscall(__NR_bpf, /*cmd=*/0xaul, /*arg=*/0x20000080ul, /*size=*/0x2cul); } 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); setup_cgroups(); use_temporary_dir(); do_sandbox_none(); return 0; }