| // general protection fault in smack_socket_sendmsg (2) |
| // https://syzkaller.appspot.com/bug?id=ab77176354a597b949c0cc6ab23ef04d304aa66f |
| // status:dup |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <arpa/inet.h> |
| #include <dirent.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <net/if.h> |
| #include <net/if_arp.h> |
| #include <netinet/in.h> |
| #include <pthread.h> |
| #include <sched.h> |
| #include <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/futex.h> |
| #include <linux/genetlink.h> |
| #include <linux/if_addr.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_link.h> |
| #include <linux/if_tun.h> |
| #include <linux/in6.h> |
| #include <linux/ip.h> |
| #include <linux/neighbour.h> |
| #include <linux/net.h> |
| #include <linux/netlink.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/tcp.h> |
| #include <linux/veth.h> |
| |
| 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 thread_start(void* (*fn)(void*), void* arg) |
| { |
| pthread_t th; |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setstacksize(&attr, 128 << 10); |
| int i; |
| for (i = 0; i < 100; i++) { |
| if (pthread_create(&th, &attr, fn, arg) == 0) { |
| pthread_attr_destroy(&attr); |
| return; |
| } |
| if (errno == EAGAIN) { |
| usleep(50); |
| continue; |
| } |
| break; |
| } |
| exit(1); |
| } |
| |
| typedef struct { |
| int state; |
| } event_t; |
| |
| static void event_init(event_t* ev) |
| { |
| ev->state = 0; |
| } |
| |
| static void event_reset(event_t* ev) |
| { |
| ev->state = 0; |
| } |
| |
| static void event_set(event_t* ev) |
| { |
| if (ev->state) |
| exit(1); |
| __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG); |
| } |
| |
| static void event_wait(event_t* ev) |
| { |
| while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) |
| syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); |
| } |
| |
| static int event_isset(event_t* ev) |
| { |
| return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); |
| } |
| |
| static int event_timedwait(event_t* ev, uint64_t timeout) |
| { |
| uint64_t start = current_time_ms(); |
| uint64_t now = start; |
| for (;;) { |
| uint64_t remain = timeout - (now - start); |
| struct timespec ts; |
| ts.tv_sec = remain / 1000; |
| ts.tv_nsec = (remain % 1000) * 1000 * 1000; |
| syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); |
| if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED)) |
| return 1; |
| now = current_time_ms(); |
| if (now - start > timeout) |
| return 0; |
| } |
| } |
| |
| static bool write_file(const char* file, const char* what, ...) |
| { |
| char buf[1024]; |
| va_list args; |
| va_start(args, what); |
| vsnprintf(buf, sizeof(buf), what, args); |
| va_end(args); |
| buf[sizeof(buf) - 1] = 0; |
| int len = strlen(buf); |
| int fd = open(file, O_WRONLY | O_CLOEXEC); |
| if (fd == -1) |
| return false; |
| if (write(fd, buf, len) != len) { |
| int err = errno; |
| close(fd); |
| errno = err; |
| return false; |
| } |
| close(fd); |
| return true; |
| } |
| |
| 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_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; |
| } |
| |
| const int kInitNetNsFd = 239; |
| |
| #define DEVLINK_FAMILY_NAME "devlink" |
| |
| #define DEVLINK_CMD_PORT_GET 5 |
| #define DEVLINK_CMD_RELOAD 37 |
| #define DEVLINK_ATTR_BUS_NAME 1 |
| #define DEVLINK_ATTR_DEV_NAME 2 |
| #define DEVLINK_ATTR_NETDEV_NAME 7 |
| #define DEVLINK_ATTR_NETNS_FD 137 |
| |
| 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 void netlink_devlink_netns_move(const char* bus_name, |
| const char* dev_name, int netns_fd) |
| { |
| struct genlmsghdr genlhdr; |
| int sock; |
| int id; |
| sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); |
| if (sock == -1) |
| exit(1); |
| id = netlink_devlink_id_get(&nlmsg, sock); |
| if (id == -1) |
| goto error; |
| memset(&genlhdr, 0, sizeof(genlhdr)); |
| genlhdr.cmd = DEVLINK_CMD_RELOAD; |
| netlink_init(&nlmsg, id, 0, &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); |
| netlink_attr(&nlmsg, DEVLINK_ATTR_NETNS_FD, &netns_fd, sizeof(netns_fd)); |
| netlink_send(&nlmsg, sock); |
| error: |
| close(sock); |
| } |
| |
| 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); |
| } |
| |
| static void initialize_devlink_pci(void) |
| { |
| int netns = open("/proc/self/ns/net", O_RDONLY); |
| if (netns == -1) |
| exit(1); |
| int ret = setns(kInitNetNsFd, 0); |
| if (ret == -1) |
| exit(1); |
| netlink_devlink_netns_move("pci", "0000:00:10.0", netns); |
| ret = setns(netns, 0); |
| if (ret == -1) |
| exit(1); |
| close(netns); |
| initialize_devlink_ports("pci", "0000:00:10.0", "netpci"); |
| } |
| |
| #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); |
| 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}, |
| }; |
| const char* devmasters[] = {"bridge", "bond", "team"}; |
| 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}, |
| }; |
| 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); |
| 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(); |
| int netns = open("/proc/self/ns/net", O_RDONLY); |
| if (netns == -1) |
| exit(1); |
| if (dup2(netns, kInitNetNsFd) < 0) |
| exit(1); |
| close(netns); |
| 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_devlink_pci(); |
| initialize_netdevices(); |
| loop(); |
| exit(1); |
| } |
| |
| static void kill_and_wait(int pid, int* status) |
| { |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| int i; |
| for (i = 0; i < 100; i++) { |
| if (waitpid(-1, status, WNOHANG | __WALL) == pid) |
| return; |
| usleep(1000); |
| } |
| DIR* dir = opendir("/sys/fs/fuse/connections"); |
| if (dir) { |
| for (;;) { |
| struct dirent* ent = readdir(dir); |
| if (!ent) |
| break; |
| if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) |
| continue; |
| char abort[300]; |
| snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", |
| ent->d_name); |
| int fd = open(abort, O_WRONLY); |
| if (fd == -1) { |
| continue; |
| } |
| if (write(fd, abort, 1) < 0) { |
| } |
| close(fd); |
| } |
| closedir(dir); |
| } else { |
| } |
| while (waitpid(-1, status, __WALL) != pid) { |
| } |
| } |
| |
| static void setup_test() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| write_file("/proc/self/oom_score_adj", "1000"); |
| } |
| |
| static void close_fds() |
| { |
| int fd; |
| for (fd = 3; fd < MAX_FDS; fd++) |
| close(fd); |
| } |
| |
| struct thread_t { |
| int created, call; |
| event_t ready, done; |
| }; |
| |
| static struct thread_t threads[16]; |
| static void execute_call(int call); |
| static int running; |
| |
| static void* thr(void* arg) |
| { |
| struct thread_t* th = (struct thread_t*)arg; |
| for (;;) { |
| event_wait(&th->ready); |
| event_reset(&th->ready); |
| execute_call(th->call); |
| __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); |
| event_set(&th->done); |
| } |
| return 0; |
| } |
| |
| static void execute_one(void) |
| { |
| int i, call, thread; |
| for (call = 0; call < 7; call++) { |
| for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); |
| thread++) { |
| struct thread_t* th = &threads[thread]; |
| if (!th->created) { |
| th->created = 1; |
| event_init(&th->ready); |
| event_init(&th->done); |
| event_set(&th->done); |
| thread_start(thr, th); |
| } |
| if (!event_isset(&th->done)) |
| continue; |
| event_reset(&th->done); |
| th->call = call; |
| __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); |
| event_set(&th->ready); |
| event_timedwait(&th->done, 45); |
| break; |
| } |
| } |
| for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) |
| sleep_ms(1); |
| close_fds(); |
| } |
| |
| static void execute_one(void); |
| |
| #define WAIT_FLAGS __WALL |
| |
| static void loop(void) |
| { |
| int iter; |
| for (iter = 0;; iter++) { |
| int pid = fork(); |
| if (pid < 0) |
| exit(1); |
| if (pid == 0) { |
| setup_test(); |
| execute_one(); |
| exit(0); |
| } |
| int status = 0; |
| uint64_t start = current_time_ms(); |
| for (;;) { |
| if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) |
| break; |
| sleep_ms(1); |
| if (current_time_ms() - start < 5 * 1000) |
| continue; |
| kill_and_wait(pid, &status); |
| break; |
| } |
| } |
| } |
| |
| uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; |
| |
| void execute_call(int call) |
| { |
| intptr_t res; |
| switch (call) { |
| case 0: |
| res = syscall(__NR_socket, 0x2000000000000021ul, 2ul, 2); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 1: |
| res = syscall(__NR_socket, 0x2000000000000021ul, 2ul, 2); |
| if (res != -1) |
| r[1] = res; |
| break; |
| case 2: |
| *(uint16_t*)0x20000040 = 0x21; |
| *(uint16_t*)0x20000042 = 0; |
| *(uint16_t*)0x20000044 = 2; |
| *(uint16_t*)0x20000046 = 0x10; |
| *(uint16_t*)0x20000048 = 2; |
| *(uint16_t*)0x2000004a = htobe16(0x4e21); |
| *(uint32_t*)0x2000004c = htobe32(0x7f000001); |
| syscall(__NR_connect, r[1], 0x20000040ul, 0x24ul); |
| break; |
| case 3: |
| *(uint64_t*)0x20005c00 = 0; |
| *(uint32_t*)0x20005c08 = 0; |
| *(uint64_t*)0x20005c10 = 0; |
| *(uint64_t*)0x20005c18 = 0; |
| *(uint64_t*)0x20005c20 = 0x20000600; |
| memcpy( |
| (void*)0x20000600, |
| "\x18\x00\x00\x00\x00\x00\x00\x00\x10\x01\x00\x00\x01\x00\x00\x00\x77" |
| "\x00\x00\xf2\x00\x00\x00\x00\xa6\xe2\x17\xb9\x1c\x3b\x0d\x87\x37\x22" |
| "\xb4\x1a\xfb\x8e\xd5\x8f\x21\x09\xe4\x48\xe6\xcc\x4b\xd0\xf1\x1a\x26" |
| "\xf4\x23\x3e\x3b\xa1\xff\x40\xe0\x62\xa4\x3f\x80\xb1\xba\xe2\x72\x83" |
| "\x16\xe6\x3e\x58\xaf\xdf\x28\x47\x32\xbd\x1e\x19\x70\x88\x1d\xdd\x3c" |
| "\x9f\x31\x0f\x82\x7c\x19\x5f\x3c\x5d\x57\xc6\x7a\x08\x46\x65\x17\xba" |
| "\x13\x00\x00\x00\x00\x85\x80\x03\xff\xff\xff\xff\xff\xff\xff\xff\x3e" |
| "\x26\xb5\xca\x26\xbb\x43\x4d\xbd\x0e\x48\x85\xc2\x14\xe5\x77\xbb\x08" |
| "\x18\x76\xe6\x3e\x7c\x28\x34\x57\x39\x25\xdb\x8b\x54\xb3\x3d\xa7\xb9" |
| "\xc7\xae\xfc\xa1\xf9\xc4\x9c\x64\x00\x00\x00\x00\x00\x00\x00\x00\x00" |
| "\x00\x00\x00\x61\xe2\x44\x8f\x23\xa7\xe4\x97\x36\xa3\x35\x44\x0c\x5b" |
| "\x76\x81\xc5\x8d\xc6\x47\x49\x4f\x0d\xbc\x81\x1b\xec\xd7\xc4\x87\xd2" |
| "\x83\xb2\xd0\x57\x45\x10\xc4\xfd\xbb\x54\xc6\x1b\xa9\xe6\x35\xc0\xb3" |
| "\xa3\xdf\x61\x0d\x99\x75\xd1\xd9\x57\x0b\x38\x02\x6b\x25\x98\x15\xdb" |
| "\xa5\x98\xff\xa0\x69\xc0\x1b\x3d\x38\x6c\x15\xd3\x4a\x59\x18\xd6\x90" |
| "\x91\x92\xec\x97\x03\x2c\x32\x00\x44\xfa\x93\x4b\xf9\x44\xd6\xd5\xce" |
| "\x62\x1d\x91\xc1\x7f\x1c\x43\x77\xa5\x4c\x7f\xeb\xb4\x6f\x83\xa7\x84" |
| "\x7a\x97\x25\x9b\x8f\x1f\xca\x2c\x28\x16\x02\x3b\x60\x41\x73\x88\x19" |
| "\x6a\x22\x09\x1c\xdf\x82\xe8\xe0\x29\x1f\x40\x82\xd9\x2d\x0a\xe7\x6b" |
| "\x94\xa1\x86\x47\xbb\x44\xcb\xe9\x36\x6a\x08\xfb\x3f\x05\x02\x64\x43" |
| "\x07\xc5\x10\x85\xf7\x21\x5f\xd4\x46\x35\xe5\x96\x7f\x21\xe8\xf5\x9b" |
| "\xd0\x21\xf3\x09\xd9\x10\xcb\x5d\x37\xcb\x16\x45\x02\x44\xef\x26\x1a" |
| "\x37\x25\x5a\x06\xc9\x7f\x19\xfa\x0e\x68\x83\x65\x43\x17\x47\x45\x68" |
| "\x40\x37\xcc\x7b\xba\x99\xaa\x1c\xbe\xfc\xdd\x62\xf7\x99\xa5\xfb\x35" |
| "\xab\xc5\xaf\x3a\xb4\x3a\x5f\xc4\x0e\xb3\x52\xe6\xff\x07\x8f\xad\x68" |
| "\x18\x28\x45\xf1\xf6\xb7\xff\x6c\x20\x0c\x10\x3b\x64\x60\x84\x04\xb4" |
| "\x1f\xce\x73\x18\x6e\x55\x19\x3d\x3d\x96\xfa\xab\x58\x74\x48\x34\x9b" |
| "\x35\xe4\x31\x91\x4b\xfd\xe3\xc0\x7f\x14\x19\xda\xc1\x19\x95\xad\xed" |
| "\x30\xb4\x4e\xad\x71\x42\xa7\xb3\x97\xa9\x13\xf6\xba\xc2\xea\xc4\x1c" |
| "\x32\xd1\x08\x63\xc3\xe6\xdd\x9e\x88\xd4\x48\x42\x95\x1e\x15\xd6\xd6" |
| "\x31\x99\x5f\x07\x14\x34", |
| 516); |
| *(uint64_t*)0x20005c28 = 0x18; |
| *(uint32_t*)0x20005c30 = 0; |
| *(uint32_t*)0x20005c38 = 0; |
| syscall(__NR_sendmmsg, r[1], 0x20005c00ul, 1ul, 0x4048000ul); |
| break; |
| case 4: |
| *(uint64_t*)0x20003180 = 0; |
| *(uint32_t*)0x20003188 = 0; |
| *(uint64_t*)0x20003190 = 0; |
| *(uint64_t*)0x20003198 = 0; |
| *(uint64_t*)0x200031a0 = 0; |
| *(uint64_t*)0x200031a8 = 0; |
| *(uint32_t*)0x200031b0 = 0; |
| *(uint32_t*)0x200031b8 = 0x40; |
| *(uint64_t*)0x200031c0 = 0; |
| *(uint32_t*)0x200031c8 = 0; |
| *(uint64_t*)0x200031d0 = 0; |
| *(uint64_t*)0x200031d8 = 0; |
| *(uint64_t*)0x200031e0 = 0; |
| *(uint64_t*)0x200031e8 = 0; |
| *(uint32_t*)0x200031f0 = 0; |
| *(uint32_t*)0x200031f8 = 2; |
| syscall(__NR_recvmmsg, r[1], 0x20003180ul, 2ul, 0ul, 0ul); |
| break; |
| case 5: |
| *(uint16_t*)0x20000040 = 0x21; |
| *(uint16_t*)0x20000042 = 0; |
| *(uint16_t*)0x20000044 = 2; |
| *(uint16_t*)0x20000046 = 0x10; |
| *(uint16_t*)0x20000048 = 2; |
| *(uint16_t*)0x2000004a = htobe16(0x4e21); |
| *(uint32_t*)0x2000004c = htobe32(0); |
| syscall(__NR_connect, r[0], 0x20000040ul, 0x24ul); |
| break; |
| case 6: |
| *(uint64_t*)0x20005c00 = 0; |
| *(uint32_t*)0x20005c08 = 0; |
| *(uint64_t*)0x20005c10 = 0; |
| *(uint64_t*)0x20005c18 = 0; |
| *(uint64_t*)0x20005c20 = 0x20000080; |
| memcpy( |
| (void*)0x20000080, |
| "\x18\x00\x00\x00\x00\x00\x00\x00\x10\x01\x00\x00\x01\x00\x00\x00\x77" |
| "\x00\x00\xf2\x00\x00\x00\x00\xa6\xe2\x17\xb9\x1c\x3b\x0d\x87\x37\x22" |
| "\xb4\x1a\xfb\x8e\xd5\x8f\x21\x09\xe4\x4c\xe6\xcc\x4b\xd0\xf1\x1a\x26" |
| "\xf4\x23\x3e\x3b\xa1\xff\x40\xe0\x62\xa4\x3f\x80\xb1\xba\xe2\x72\x83" |
| "\x16\xe6\x3e\x58\xaf\xdf\x28\x47\x32\xbd\x1e\x19\x70\x88\x1d\xdd\x3c" |
| "\x9f\x31\x0f\x82\x7c\x19\x5f\x3c\x5d\x57\xc6\x7a\x08\x46\x65\x17\xba" |
| "\x13\x00\x00\x00\x00\x85\x80\x03\xff\xff\xff\xff\xff\xff\xff\xff\x3e" |
| "\x26\xb5\xca\x26\xbb\x43\x4d\xbd\x0e\x48\x85\xc2\x14\xe5\x77\xbb\x08" |
| "\x18\x76\x7c\x28\x34\x57\x20\x00\x00\x00\x00\x00\x00\x00\xb9\xc7\xae" |
| "\xfc\xa1\xf9\xc4\x9c\x64\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" |
| "\x00\x61\xe2\x44\x8f\x23\xa7\xe4\x97\x36\xa3\x35\x44\x0c\x5b\x76\x81" |
| "\xc5\x8d\xc6\x47\x49\x4f\x0d\xbc\x81\x1b\xec\xd7\xc4\x87\xd2\x83\xb2" |
| "\xd0\x57\x45\x10\xc4\xfd\xbb\x54\xc6\x1b\xa9\xe6\x35\xc0\xb3\xa3\xdf" |
| "\x61\x0d\x99\x75\xd1\xd9\x57\x0b\x38\x02\x6b\x25\x98\x15\xdb\xa5\x98" |
| "\xff\xa0\x69\xc0\x1b\x3d\x38\x6c\x15\xd3\x47\x29\x49\x47\xa8\x3b\xe6" |
| "\x97\x97\x03\x2c\x32\x00\x44\xfa\x93\x4b\xf9\x44\xd6\xd5\xce\x62\x1d" |
| "\x91\xc1\x7f\x1c\x43\x77\xa5\x4c\x7f\xeb\xb4\x6f\x83\xa7\x84\x7a\x97" |
| "\x25\x9b\x8f\x1f\xca\x2c\x28\x16\x02\x3b\x60\x41\x73\x88\x19\x68\x22" |
| "\x09\x1c\xdf\x82\xe8\xe0\x29\x1f\x40\x82\xd9\x2d\x0a\xe7\x6b\x94\xa1" |
| "\x86\x47\xbb\x44\xcb\xe9\x36\x6a\x08\xfb\x3f\x05\x02\x64\x43\x07\xc5" |
| "\x10\x85\xf7\x21\x5f\xd4\x46\x35\xe5\x96\x7f\x21\xe8\xf5\x9b\xd0\x21" |
| "\xf3\x09\xd9\x10\xcb\x5d\x37\xcb\x16\x45\x02\x44\xef\x26\x1a\x37\x25" |
| "\x5a\x06\xc9\x7f\x19\xfa\x0e\x68\x83\x65\x43\x17\x47\x45\x68\x40\x37" |
| "\xcc\x7b\xba\x99\xaa\x1c\xbe\xfc\xdd\x62\xf7\x99\xa5\xfb\x35\xab\xc5" |
| "\xaf\x3a\xb4\x3a\x5f\xc4\x0e\xb3\x52\xe6\xff\x07\x8f\xad\x68\x18\x28" |
| "\x45\xf1\xf6\xb7\xff\x6c\x20\x0c\x10\x3b\x64\x60\x84\x04\xb4\x1f\xce" |
| "\x73\x18\x6e\x55\x19\x3d\x3d\x96\xfa\xab\x58\x74\x48\x34\x9b\x35\xe4" |
| "\x31\x91\x4b\xfd\xe3\xc0\x7f\x14\x19\xda\xc1\x19\x95\xad\xed\x30\xb4" |
| "\x4e\xad\x71\x42\xa7\xb3\x97\xb1\x13\xf6\xba\xc2\xea\xc4\x1c\x32\xd1" |
| "\x08\x63\xc3\xe6\xdd\x9e\x88\xd4\x48\x42\x95\x1e\x15\xd6\xd6\x31\x99" |
| "\x5f\x07\x14\x34\x00\x00\x67\x6f\x25\x1e\x6d\x98\xf2\x88\x73\x78\x37" |
| "\x75\x3a\x0a\xa6\x86\x76\x04\xdd\x59\x14\x20\x25\xa0\x96\x1a\xe7\xb4" |
| "\x7a\x4c\xd3\x44\xbd\x68\x4b\xfe\xfc\xd5\x5d\x6f\x8e\x10\x4f\x83\x81" |
| "\x0b\x8a\x4d\xe6\xd0\xd1\xcc\x60\xf5\x1d\x44\x3f\x68\x68\xe7\x89\x0d" |
| "\x35\xdf\x92\x16\x31\xea\xf9\xfa\xd0\xa8\xbd\x0b\xd2\x2a\x34\xc8\xd3" |
| "\x15\x5b\x3a\x47\xf0\x78\xd3\xb3\xec\x7b\xb4\x2d\x49\x3c\xf5\xd1\xea" |
| "\xb7\xdf\xfb\x3f\xb2\x1c\x2f\xf1\x4b\xee\x85\x24\x90\x1c\xf5\xd6\x2a" |
| "\xe4\xa3\x6c\xa5\x07\xa6\xb2\x0e\xee\x19\x4a\xf3\x5f\xf4\x00\x92\xc7" |
| "\xc4\xe2\x97\xa2\x5b\x20\x09\x0b\x01\x04\x85\x9c\xdd\xdf\xbd\x65\x0d" |
| "\xec\xdd\xff\xb8\x23\x1f\x70", |
| 670); |
| *(uint64_t*)0x20005c28 = 0x18; |
| *(uint32_t*)0x20005c30 = 0; |
| *(uint32_t*)0x20005c38 = 0; |
| syscall(__NR_sendmmsg, r[0], 0x20005c00ul, 1ul, 0x4048000ul); |
| break; |
| } |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0); |
| for (procid = 0; procid < 6; procid++) { |
| if (fork() == 0) { |
| do_sandbox_none(); |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |