| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <arpa/inet.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 <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 <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 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); |
| } |
| |
| 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); |
| } |
| |
| uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; |
| |
| void loop(void) |
| { |
| intptr_t res = 0; |
| res = syscall(__NR_socket, 0xaul, 0x80002ul, 0); |
| if (res != -1) |
| r[0] = res; |
| *(uint32_t*)0x20000040 = 0x400; |
| syscall(__NR_setsockopt, r[0], 0x11ul, 0x67ul, 0x20000040ul, 4ul); |
| res = syscall(__NR_socket, 2ul, 2ul, 0ul); |
| if (res != -1) |
| r[1] = res; |
| *(uint16_t*)0x20000000 = 2; |
| *(uint16_t*)0x20000002 = htobe16(0x4e22); |
| *(uint32_t*)0x20000004 = htobe32(0); |
| syscall(__NR_bind, r[1], 0x20000000ul, 0x10ul); |
| *(uint16_t*)0x20000080 = 0xa; |
| *(uint16_t*)0x20000082 = htobe16(0); |
| *(uint32_t*)0x20000084 = htobe32(0); |
| *(uint8_t*)0x20000088 = 0xfe; |
| *(uint8_t*)0x20000089 = 0x80; |
| *(uint8_t*)0x2000008a = 0; |
| *(uint8_t*)0x2000008b = 0; |
| *(uint8_t*)0x2000008c = 0; |
| *(uint8_t*)0x2000008d = 0; |
| *(uint8_t*)0x2000008e = 0; |
| *(uint8_t*)0x2000008f = 0; |
| *(uint8_t*)0x20000090 = 0; |
| *(uint8_t*)0x20000091 = 0; |
| *(uint8_t*)0x20000092 = 0; |
| *(uint8_t*)0x20000093 = 0; |
| *(uint8_t*)0x20000094 = 0; |
| *(uint8_t*)0x20000095 = 0; |
| *(uint8_t*)0x20000096 = 0; |
| *(uint8_t*)0x20000097 = 0xaa; |
| *(uint32_t*)0x20000098 = 4; |
| syscall(__NR_connect, r[0], 0x20000080ul, 0x1cul); |
| memcpy( |
| (void*)0x20000600, |
| "\xc6\x7b\xf2\xac\x57\x90\xad\x79\x88\x32\x52\x8a\xfd\x13\x1c\xdf\x48\x04" |
| "\xcf\x48\x54\x59\x53\x51\xc4\x84\xe7\x61\x33\xf7\x3a\xd4\x30\xc9\x2d\xfb" |
| "\x94\xe5\x9e\x28\x43\x20\x27\xf3\x97\x81\xe5\xb6\xed\x85\xf5\x21\x82\x47" |
| "\x43\xe1\xc0\x22\xc4\xb8\x38\x25\xe6\x0c\x1d\xf0\x52\xb0\xad\xcd\x5e\x34" |
| "\xa4\xca\x8b\x39\x18\x42\x24\xe7\x9f\x13\x18\x1f\x21\x2c\x74\x30\xb0\x28" |
| "\xf2\x6d\x5a\xfe\xb9\x01\xb9\x43\x11\xb4\x53\x66\x74\x29\x27\xb8\xf2\xcb" |
| "\x3f\x9e\xaa\xc5\xe8\xbe\x7f\x3e\xd7\x01\xe6\x4b\x23\xc7\x3d\x72\xa2\xf9" |
| "\x8d\x0b\xb6\xc2\x33\xf2\x48\xb6\x7a\x47\xa0\xeb\xd0\x7a\x35\xe5\x1d\xa8" |
| "\x4a\x49\x44\x3f\xbe\xd3\xeb\xbf\xc4\xb6\xd7\xef\x21\xeb\x1e\x6a\xd0\x82" |
| "\x8e\xd4\x10\x6c\x0a\x2e\xfe\x82\x7c\x77\x07\x44\x42\xa3\xed\x0d\x62\x05" |
| "\x9b\x56\xb6\x7c\xb6\x1e\x56\x19\x3d\xb3\x03\xab\x7d\x0d\xd5\xd7\x78\x16" |
| "\xc5\x1a\x0d\x42\x22\xee\xa6\x31\x8f\xa0\x24\x7a\x7d\x21\xa3\xc1\x00\x92" |
| "\x41\x17\xb2\x75\x9a\xf3\x79\x31\x2e\xef\x20\xa9\x21\x2a\x28\x71\xee\x3f" |
| "\x3f\xbf\x85\xb6\x1e\x4f\xce\xce\x2c\x87\xd0\x40\x8f\xc4\x6b\x7d\xeb\xd8" |
| "\x84\xa9\xd2\x98\x92\x3e\x73\x27\x99\x22\xe7\x84\xd0\x56\x03\x01\x8e\x62" |
| "\x0f\x30\xfa\xce\x82\x95\xb2\xad\x56\xbf\xea\xd0\x2f\x12\x01\xa3\x9c\xa5" |
| "\x58\xa2\x9f\xe8\x3a\x61\xc7\x7c\xb5\xb9\x22\xfe\x1b\xc8\x73\x63\xf4\x1c" |
| "\xd6\xe2\x49\x1c\x5f\x8c\x39\xc8\x06\x9d\xbb\xa4\xcc\x6e\x23\x1f\x37\xd5" |
| "\x3f\x8f\x3d\x2f\xe8\x77\xd3\xcb\xc7\x5a\x2d\xf6\x12\xd7\x5b\x9f\x1e\xa4" |
| "\x94\x70\x2a\x65\x8d\x81\x0a\x72\x57\xd2\x3f\x0e\xe8\x55\xbe\x69\x4a\x5a" |
| "\xab\x0b\x84\xa0\xe9\xae\x50\x5d\x1a\x24\x02\xa4\x53\x7d\xee\xdc\x26\x4b" |
| "\xe3\xde\xdc\x6c\x47\x07\x76\x67\x3b\x45\x2d\x80\xa7\x5e\xfa\x54\x17\x30" |
| "\x19\x91\x10\xa3\x32\xfa\x9d\x24\xf5\x9d\x22\xb8\xf1\xc6\x3f\xcd\x41\xc1" |
| "\x3d\x2b\x2f\xee\xb6\xa2\x68\xfa\xa7\x90\x18\x74\x9b\xc4\x53\x55\x13\x21" |
| "\xfa\xc1\x05\x7e\x81\x0c\x50\x97\xce\xf7\x55\xbc\xc9\xae\x2f\x78\x12\x40" |
| "\x50\xc8\x9f\x7f\xdd\xf5\xe0\x65\x61\xb9\x24\xee\x06\x2a\x04\x0d\x00\xe3" |
| "\x1c\xca\xaa\x11\x9a\x08\x5a\xcc\x4a\x5a\xad\xbd\xbb\x09\xf7\x5a\xf5\x2c" |
| "\x47\x14\x62\xd5\xfc\xdf\xd2\xfa\xdb\x9e\x7d\x0b\xa0\xd4\x9b\x72\x58\xba" |
| "\xed\x5b\xd9\x43\xf6\xfb\xb6\xa9\x31\x33\x39\xae\x57\xc4\x97\x57\x36\x7c" |
| "\xb5\xc4\xcc\xcf\xd5\x69\xfb\xa0\x8e\xbd\x2f\xfc\x89\x53\x9c\xa9\x38\x13" |
| "\xe7\xa3\x55\xd9\xa5\x4f\xfc\xee\x8a\x19\x41\xfb\xf9\xb6\x88\x03\x0e\x86" |
| "\x40\x61\xc2\x27\x9d\x41\x28\x64\x99\xcb\xf1\x4a\xe6\x0d\x18\x72\x96\x12" |
| "\xcd\x62\x87\xf3\x7c\xb1\x16\x97\xd7\xf9\xa8\x5d\x99\x25\xc4\x8a\x51\x2a" |
| "\x50\x5b\xff\xbb\x1f\x14\xc3\x1b\xdb\x93\x87\xaf\x73\xf3\x72\x04\x83\xb2" |
| "\x2f\xcb\x1d\x1c\xa3\x7c\xf0\x8a\x94\x27\x52\xa0\xd6\x0f\x56\x3d\xaf\x11" |
| "\xbb\x0f\xdf\x93\x6d\xb7\x97\x24\x83\x80\x26\x47\x20\x96\x8a\xf1\xa6\x31" |
| "\xfc\x4d\x3e\x7a\x60\xc2\x22\x34\x8c\x6c\x88\xbe\x8c\x70\x62\x68\x80\xbf" |
| "\x0c\x4f\x56\xff\x9d\x2d\x93\x85\xaa\x4a\xf2\x54\xd2\xc6\x82\x7c\x00\x58" |
| "\x0f\x66\xa9\xdc\x3f\x48\x0d\xd8\xce\xdd\x2a\x58\xb9\x0b\xe2\xf5\xc3\x0d" |
| "\x56\xcc\x65\x0b\x76\x59\xe4\xf5\x35\x78\x50\xc0\xc3\x95\x5a\x73\x73\x17" |
| "\x37\x91\x7e\x27\xc9\x85\xcb\x01\xbc\x1e\xd8\x03\xb2\xb1\xf9\xbc\xec\x38" |
| "\x00\x49\x99\x96\x12\x4a\xfd\x6b\x82\x90\xb2\x68\x02\xf7\x06\xff\x49\xb6" |
| "\x2d\xe0\xec\x0c\xca\x3a\xc5\x1d\xcb\xf0\x65\xac\x20\x0b\xe0\xb1\x41\xa6" |
| "\xa0\x56\x3d\x6a\xd2\xe0\x88\x38\x9f\xa4\xb6\x93\x39\xd5\x05\x0e\x41\x4e" |
| "\x76\x8c\x95\xf2\x78\xcf\x7a\x53\x77\xd0\x77\x07\xd4\xf4\x16\x97\x96\xbf" |
| "\x97\xdf\x45\x76\x44\x7a\x54\x22\x70\xa0\xaf\x8b\xac\x82\x12\xac\x2b\x23" |
| "\xf6\x88\xb8\x6f\x50\xe2\xd1\xbf\x6c\x51\xd6\x87\x0a\x31\x09\x6b\xc4\x36" |
| "\xc2\x65\xe1\xf9\xea\x58\x33\x0b\x76\x81\x14\xc2\xd1\x2d\x07\x6b\xbe\x56" |
| "\xc9\xc5\x51\xe9\x7e\xe6\x3f\xef\x6a\xc6\x1d\x69\xf6\x97\xdf\x6e\xc1\xf4" |
| "\x9a\x36\x60\x86\x8a\x08\xed\xd2\x8f\xf1\x2e\x31\xcc\xab\x43\x76\xf8\x91" |
| "\x9e\x76\x8d\x70\xc9\x01\x91\x88\x80\x0b\x87\x78\x9d\xfd\x2a\x6a\xb3\xe9" |
| "\x7e\xe0\xfa\x03\xeb\xf9\x1f\x2c\x30\x46\x53\xc4\x41\xc8\x4e\xc9\xa0\x4a" |
| "\xdf\x54\x8a\xd4\xaa\x83\xf5\xb0\x05\xef\x24\xc8\xef\x86\xc4\xfc\x2c\x10" |
| "\xfd\x0b\xcb\x67\x38\xe9\xeb\x28\x9e\xcb\x42\x19\x37\xd6\x63\x3d\xab\xcc" |
| "\xa4\x13\x6a\x71\xf1\x68\xb0\xc9\xd7\xd3\xd2\x5c\xc3\x33\x9e\xa0\x01\xa1" |
| "\x7a\xea\x7f\x73\xd7\xac\xa7\x70\xe3\xc6\x55\xd4\x4e\xf1\x95\xc3\x55\x2c" |
| "\xb7\x8a\x5c\xf5\xe7\xbb\x4f\x03\x11\x3c\x38\xc4\x52\xef\x93\x32\xe6", |
| 1025); |
| *(uint16_t*)0x200011c0 = 0xa; |
| *(uint16_t*)0x200011c2 = htobe16(0x4e22); |
| *(uint32_t*)0x200011c4 = htobe32(0); |
| *(uint8_t*)0x200011c8 = 0; |
| *(uint8_t*)0x200011c9 = 0; |
| *(uint8_t*)0x200011ca = 0; |
| *(uint8_t*)0x200011cb = 0; |
| *(uint8_t*)0x200011cc = 0; |
| *(uint8_t*)0x200011cd = 0; |
| *(uint8_t*)0x200011ce = 0; |
| *(uint8_t*)0x200011cf = 0; |
| *(uint8_t*)0x200011d0 = 0; |
| *(uint8_t*)0x200011d1 = 0; |
| *(uint8_t*)0x200011d2 = -1; |
| *(uint8_t*)0x200011d3 = -1; |
| *(uint32_t*)0x200011d4 = htobe32(0xe0000001); |
| *(uint32_t*)0x200011d8 = 0; |
| syscall(__NR_sendto, r[0], 0x20000600ul, 0x401ul, 0ul, 0x200011c0ul, 0x1cul); |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0); |
| do_sandbox_none(); |
| return 0; |
| } |