| // memory leak in nf_tables_parse_netdev_hooks |
| // https://syzkaller.appspot.com/bug?id=6d412510c4799ff347cfae839f69506cde183ef8 |
| // 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 <sched.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include <sys/prctl.h> |
| #include <sys/resource.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <sys/uio.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <linux/capability.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> |
| |
| 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; |
| } |
| |
| #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[1024]; |
| }; |
| |
| static struct nlmsg nlmsg; |
| |
| 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; |
| 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) |
| { |
| 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 (hdr->nlmsg_type == NLMSG_DONE) { |
| *reply_len = 0; |
| return 0; |
| } |
| if (n < sizeof(struct nlmsghdr)) |
| exit(1); |
| if (reply_len && hdr->nlmsg_type == reply_type) { |
| *reply_len = n; |
| return 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 int netlink_send(struct nlmsg* nlmsg, int sock) |
| { |
| return netlink_send_ext(nlmsg, sock, 0, NULL); |
| } |
| |
| 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) |
| { |
| struct ifinfomsg hdr; |
| memset(&hdr, 0, sizeof(hdr)); |
| 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); |
| netlink_done(nlmsg); |
| int err = netlink_send(nlmsg, sock); |
| (void)err; |
| } |
| |
| static void netlink_add_veth(struct nlmsg* nlmsg, int sock, const char* name, |
| const char* peer) |
| { |
| netlink_add_device_impl(nlmsg, "veth", name); |
| 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); |
| (void)err; |
| } |
| |
| 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); |
| 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); |
| (void)err; |
| } |
| |
| 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); |
| netlink_done(nlmsg); |
| int ifindex = if_nametoindex(link); |
| netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex)); |
| int err = netlink_send(nlmsg, sock); |
| (void)err; |
| } |
| |
| 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); |
| 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); |
| (void)err; |
| } |
| |
| static void netlink_add_macvlan(struct nlmsg* nlmsg, int sock, const char* name, |
| const char* link) |
| { |
| netlink_add_device_impl(nlmsg, "macvlan", name); |
| 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); |
| (void)err; |
| } |
| |
| 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); |
| 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); |
| (void)err; |
| } |
| |
| #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); |
| 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); |
| (void)err; |
| } |
| |
| 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); |
| (void)err; |
| } |
| |
| 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)); |
| (void)err; |
| } |
| |
| 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)); |
| (void)err; |
| } |
| |
| #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 int netlink_devlink_id_get(struct nlmsg* nlmsg, int sock) |
| { |
| struct genlmsghdr genlhdr; |
| struct nlattr* attr; |
| int err, n; |
| uint16_t id = 0; |
| 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, DEVLINK_FAMILY_NAME, |
| strlen(DEVLINK_FAMILY_NAME) + 1); |
| err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n); |
| if (err) { |
| return -1; |
| } |
| 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) { |
| return -1; |
| } |
| recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); /* recv ack */ |
| return id; |
| } |
| |
| 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_devlink_id_get(&nlmsg, sock); |
| 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); |
| if (err) { |
| 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) |
| { |
| char buf[16]; |
| sprintf(buf, "%u %u", addr, port_count); |
| if (write_file("/sys/bus/netdevsim/new_device", buf)) { |
| snprintf(buf, sizeof(buf), "netdevsim%d", addr); |
| initialize_devlink_ports("netdevsim", buf, "netdevsim"); |
| } |
| } |
| 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"}, |
| {"netdevsim", netdevsim}, {"veth", 0}, |
| {"xfrm", "xfrm0"}, |
| }; |
| 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}, |
| }; |
| 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_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); |
| 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); |
| } |
| |
| #define MAX_FDS 30 |
| |
| 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(); |
| initialize_netdevices_init(); |
| if (unshare(CLONE_NEWNET)) { |
| } |
| initialize_netdevices(); |
| loop(); |
| exit(1); |
| } |
| |
| static int inject_fault(int nth) |
| { |
| int fd; |
| fd = open("/proc/thread-self/fail-nth", O_RDWR); |
| if (fd == -1) |
| exit(1); |
| char buf[16]; |
| sprintf(buf, "%d", nth + 1); |
| if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf)) |
| exit(1); |
| return fd; |
| } |
| |
| 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"); |
| } |
| |
| static void close_fds() |
| { |
| int fd; |
| for (fd = 3; fd < MAX_FDS; fd++) |
| close(fd); |
| } |
| |
| static void setup_fault() |
| { |
| static struct { |
| const char* file; |
| const char* val; |
| bool fatal; |
| } files[] = { |
| {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true}, |
| {"/sys/kernel/debug/fail_futex/ignore-private", "N", false}, |
| {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false}, |
| {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false}, |
| {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false}, |
| }; |
| unsigned i; |
| for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) { |
| if (!write_file(files[i].file, files[i].val)) { |
| if (files[i].fatal) |
| exit(1); |
| } |
| } |
| } |
| |
| #define KMEMLEAK_FILE "/sys/kernel/debug/kmemleak" |
| |
| static void setup_leak() |
| { |
| if (!write_file(KMEMLEAK_FILE, "scan")) |
| exit(1); |
| sleep(5); |
| if (!write_file(KMEMLEAK_FILE, "scan")) |
| exit(1); |
| if (!write_file(KMEMLEAK_FILE, "clear")) |
| exit(1); |
| } |
| |
| static void check_leaks(void) |
| { |
| int fd = open(KMEMLEAK_FILE, O_RDWR); |
| if (fd == -1) |
| exit(1); |
| uint64_t start = current_time_ms(); |
| if (write(fd, "scan", 4) != 4) |
| exit(1); |
| sleep(1); |
| while (current_time_ms() - start < 4 * 1000) |
| sleep(1); |
| if (write(fd, "scan", 4) != 4) |
| exit(1); |
| static char buf[128 << 10]; |
| ssize_t n = read(fd, buf, sizeof(buf) - 1); |
| if (n < 0) |
| exit(1); |
| int nleaks = 0; |
| if (n != 0) { |
| sleep(1); |
| if (write(fd, "scan", 4) != 4) |
| exit(1); |
| if (lseek(fd, 0, SEEK_SET) < 0) |
| exit(1); |
| n = read(fd, buf, sizeof(buf) - 1); |
| if (n < 0) |
| exit(1); |
| buf[n] = 0; |
| char* pos = buf; |
| char* end = buf + n; |
| while (pos < end) { |
| char* next = strstr(pos + 1, "unreferenced object"); |
| if (!next) |
| next = end; |
| char prev = *next; |
| *next = 0; |
| fprintf(stderr, "BUG: memory leak\n%s\n", pos); |
| *next = prev; |
| pos = next; |
| nleaks++; |
| } |
| } |
| if (write(fd, "clear", 5) != 5) |
| exit(1); |
| close(fd); |
| if (nleaks) |
| exit(1); |
| } |
| |
| 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(); |
| 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 < 5 * 1000) |
| continue; |
| kill_and_wait(pid, &status); |
| break; |
| } |
| check_leaks(); |
| } |
| } |
| |
| uint64_t r[1] = {0xffffffffffffffff}; |
| |
| void execute_one(void) |
| { |
| intptr_t res = 0; |
| res = syscall(__NR_socket, 0x10ul, 3ul, 0xcul); |
| if (res != -1) |
| r[0] = res; |
| *(uint64_t*)0x20003e00 = 0; |
| *(uint32_t*)0x20003e08 = 0; |
| *(uint64_t*)0x20003e10 = 0x20003dc0; |
| *(uint64_t*)0x20003dc0 = 0x20000200; |
| *(uint32_t*)0x20000200 = 0x14; |
| *(uint16_t*)0x20000204 = 0x10; |
| *(uint16_t*)0x20000206 = 1; |
| *(uint32_t*)0x20000208 = 0; |
| *(uint32_t*)0x2000020c = 0; |
| *(uint8_t*)0x20000210 = 0; |
| *(uint8_t*)0x20000211 = 0; |
| *(uint16_t*)0x20000212 = htobe16(0xa); |
| *(uint32_t*)0x20000214 = 0x20; |
| *(uint8_t*)0x20000218 = 0; |
| *(uint8_t*)0x20000219 = 0xa; |
| *(uint16_t*)0x2000021a = 0x1405; |
| *(uint32_t*)0x2000021c = 0; |
| *(uint32_t*)0x20000220 = 0; |
| *(uint8_t*)0x20000224 = 1; |
| *(uint8_t*)0x20000225 = 0; |
| *(uint16_t*)0x20000226 = htobe16(0); |
| *(uint16_t*)0x20000228 = 9; |
| *(uint16_t*)0x2000022a = 1; |
| memcpy((void*)0x2000022c, "syz0\000", 5); |
| *(uint32_t*)0x20000234 = 0x6c; |
| *(uint8_t*)0x20000238 = 0x16; |
| *(uint8_t*)0x20000239 = 0xa; |
| *(uint16_t*)0x2000023a = 1; |
| *(uint32_t*)0x2000023c = 0; |
| *(uint32_t*)0x20000240 = 0; |
| *(uint8_t*)0x20000244 = 1; |
| *(uint8_t*)0x20000245 = 0; |
| *(uint16_t*)0x20000246 = htobe16(0); |
| *(uint16_t*)0x20000248 = 9; |
| *(uint16_t*)0x2000024a = 1; |
| memcpy((void*)0x2000024c, "syz0\000", 5); |
| *(uint16_t*)0x20000254 = 9; |
| *(uint16_t*)0x20000256 = 2; |
| memcpy((void*)0x20000258, "syz2\000", 5); |
| *(uint16_t*)0x20000260 = 0x40; |
| STORE_BY_BITMASK(uint16_t, , 0x20000262, 3, 0, 14); |
| STORE_BY_BITMASK(uint16_t, , 0x20000263, 0, 6, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20000263, 1, 7, 1); |
| *(uint16_t*)0x20000264 = 0x2c; |
| STORE_BY_BITMASK(uint16_t, , 0x20000266, 3, 0, 14); |
| STORE_BY_BITMASK(uint16_t, , 0x20000267, 0, 6, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20000267, 1, 7, 1); |
| *(uint16_t*)0x20000268 = 0x14; |
| *(uint16_t*)0x2000026a = 1; |
| memcpy((void*)0x2000026c, |
| "sit0\000\000\000\000\000\000\000\000\000\000\000\000", 16); |
| *(uint16_t*)0x2000027c = 0x14; |
| *(uint16_t*)0x2000027e = 1; |
| memcpy((void*)0x20000280, "vlan0\000\000\000\000\000\000\000\000\000\000\000", |
| 16); |
| *(uint16_t*)0x20000290 = 8; |
| STORE_BY_BITMASK(uint16_t, , 0x20000292, 2, 0, 14); |
| STORE_BY_BITMASK(uint16_t, , 0x20000293, 1, 6, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20000293, 0, 7, 1); |
| *(uint32_t*)0x20000294 = htobe32(0xfffffffd); |
| *(uint16_t*)0x20000298 = 8; |
| STORE_BY_BITMASK(uint16_t, , 0x2000029a, 1, 0, 14); |
| STORE_BY_BITMASK(uint16_t, , 0x2000029b, 1, 6, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x2000029b, 0, 7, 1); |
| *(uint32_t*)0x2000029c = htobe32(0); |
| *(uint32_t*)0x200002a0 = 0x54; |
| *(uint8_t*)0x200002a4 = 2; |
| *(uint8_t*)0x200002a5 = 0xa; |
| *(uint16_t*)0x200002a6 = 0; |
| *(uint32_t*)0x200002a8 = 0; |
| *(uint32_t*)0x200002ac = 0; |
| *(uint8_t*)0x200002b0 = 0; |
| *(uint8_t*)0x200002b1 = 0; |
| *(uint16_t*)0x200002b2 = htobe16(0); |
| *(uint16_t*)0x200002b4 = 9; |
| *(uint16_t*)0x200002b6 = 1; |
| memcpy((void*)0x200002b8, "syz1\000", 5); |
| *(uint16_t*)0x200002c0 = 8; |
| STORE_BY_BITMASK(uint16_t, , 0x200002c2, 2, 0, 14); |
| STORE_BY_BITMASK(uint16_t, , 0x200002c3, 1, 6, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x200002c3, 0, 7, 1); |
| *(uint32_t*)0x200002c4 = htobe32(0); |
| *(uint16_t*)0x200002c8 = 0xc; |
| STORE_BY_BITMASK(uint16_t, , 0x200002ca, 4, 0, 14); |
| STORE_BY_BITMASK(uint16_t, , 0x200002cb, 1, 6, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x200002cb, 0, 7, 1); |
| *(uint64_t*)0x200002cc = htobe64(0); |
| *(uint16_t*)0x200002d4 = 9; |
| *(uint16_t*)0x200002d6 = 1; |
| memcpy((void*)0x200002d8, "syz0\000", 5); |
| *(uint16_t*)0x200002e0 = 0xc; |
| STORE_BY_BITMASK(uint16_t, , 0x200002e2, 4, 0, 14); |
| STORE_BY_BITMASK(uint16_t, , 0x200002e3, 1, 6, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x200002e3, 0, 7, 1); |
| *(uint64_t*)0x200002e4 = htobe64(0); |
| *(uint16_t*)0x200002ec = 8; |
| STORE_BY_BITMASK(uint16_t, , 0x200002ee, 2, 0, 14); |
| STORE_BY_BITMASK(uint16_t, , 0x200002ef, 1, 6, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x200002ef, 0, 7, 1); |
| *(uint32_t*)0x200002f0 = htobe32(0); |
| *(uint32_t*)0x200002f4 = 0x14; |
| *(uint16_t*)0x200002f8 = 0x11; |
| *(uint16_t*)0x200002fa = 1; |
| *(uint32_t*)0x200002fc = 0; |
| *(uint32_t*)0x20000300 = 0; |
| *(uint8_t*)0x20000304 = 0; |
| *(uint8_t*)0x20000305 = 0; |
| *(uint16_t*)0x20000306 = htobe16(0xa); |
| *(uint64_t*)0x20003dc8 = 0x108; |
| *(uint64_t*)0x20003e18 = 1; |
| *(uint64_t*)0x20003e20 = 0; |
| *(uint64_t*)0x20003e28 = 0; |
| *(uint32_t*)0x20003e30 = 0; |
| inject_fault(30); |
| syscall(__NR_sendmsg, r[0], 0x20003e00ul, 0ul); |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0); |
| setup_leak(); |
| setup_fault(); |
| do_sandbox_none(); |
| return 0; |
| } |