text: // KMSAN: uninit-value in xfrm_state_find
  // https://syzkaller.appspot.com/bug?id=4d9dc4ec10e0d7b004645eadc3e99bbc2af67a74
  // status:open
  // autogenerated by syzkaller (http://github.com/google/syzkaller)
  
  #define _GNU_SOURCE
  #include <arpa/inet.h>
  #include <endian.h>
  #include <errno.h>
  #include <errno.h>
  #include <fcntl.h>
  #include <linux/if.h>
  #include <linux/if_ether.h>
  #include <linux/if_tun.h>
  #include <linux/ip.h>
  #include <linux/tcp.h>
  #include <net/if_arp.h>
  #include <sched.h>
  #include <signal.h>
  #include <stdarg.h>
  #include <stdarg.h>
  #include <stdbool.h>
  #include <stdbool.h>
  #include <stdio.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <sys/ioctl.h>
  #include <sys/prctl.h>
  #include <sys/resource.h>
  #include <sys/stat.h>
  #include <sys/syscall.h>
  #include <sys/time.h>
  #include <sys/uio.h>
  #include <sys/wait.h>
  #include <unistd.h>
  
  __attribute__((noreturn)) static void doexit(int status)
  {
    volatile unsigned i;
    syscall(__NR_exit_group, status);
    for (i = 0;; i++) {
    }
  }
  #include <errno.h>
  #include <stdarg.h>
  #include <stdint.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <sys/stat.h>
  
  const int kFailStatus = 67;
  const int kRetryStatus = 69;
  
  static void fail(const char* msg, ...)
  {
    int e = errno;
    va_list args;
    va_start(args, msg);
    vfprintf(stderr, msg, args);
    va_end(args);
    fprintf(stderr, " (errno %d)\n", e);
    doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
  }
  
  static void use_temporary_dir()
  {
    char tmpdir_template[] = "./syzkaller.XXXXXX";
    char* tmpdir = mkdtemp(tmpdir_template);
    if (!tmpdir)
      fail("failed to mkdtemp");
    if (chmod(tmpdir, 0777))
      fail("failed to chmod");
    if (chdir(tmpdir))
      fail("failed to chdir");
  }
  
  static void vsnprintf_check(char* str, size_t size, const char* format,
                              va_list args)
  {
    int rv;
  
    rv = vsnprintf(str, size, format, args);
    if (rv < 0)
      fail("tun: snprintf failed");
    if ((size_t)rv >= size)
      fail("tun: string '%s...' doesn't fit into buffer", str);
  }
  
  static void snprintf_check(char* str, size_t size, const char* format, ...)
  {
    va_list args;
  
    va_start(args, format);
    vsnprintf_check(str, size, format, args);
    va_end(args);
  }
  
  #define COMMAND_MAX_LEN 128
  #define PATH_PREFIX                                                            \
    "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin "
  #define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1)
  
  static void execute_command(bool panic, const char* format, ...)
  {
    va_list args;
    char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN];
    int rv;
  
    va_start(args, format);
    memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN);
    vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args);
    va_end(args);
    rv = system(command);
    if (rv) {
      if (panic)
        fail("command '%s' failed: %d", &command[0], rv);
    }
  }
  
  static int tunfd = -1;
  static int tun_frags_enabled;
  
  #define SYZ_TUN_MAX_PACKET_SIZE 1000
  
  #define TUN_IFACE "syz_tun"
  
  #define LOCAL_MAC "aa:aa:aa:aa:aa:aa"
  #define REMOTE_MAC "aa:aa:aa:aa:aa:bb"
  
  #define LOCAL_IPV4 "172.20.20.170"
  #define REMOTE_IPV4 "172.20.20.187"
  
  #define LOCAL_IPV6 "fe80::aa"
  #define REMOTE_IPV6 "fe80::bb"
  
  #define IFF_NAPI 0x0010
  #define IFF_NAPI_FRAGS 0x0020
  
  static void initialize_tun(void)
  {
    tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
    if (tunfd == -1) {
      printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
      printf("otherwise fuzzing or reproducing might not work as intended\n");
      return;
    }
    const int kTunFd = 252;
    if (dup2(tunfd, kTunFd) < 0)
      fail("dup2(tunfd, kTunFd) failed");
    close(tunfd);
    tunfd = kTunFd;
  
    struct ifreq ifr;
    memset(&ifr, 0, sizeof(ifr));
    strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ);
    ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_NAPI | IFF_NAPI_FRAGS;
    if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
      ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
      if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0)
        fail("tun: ioctl(TUNSETIFF) failed");
    }
    if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0)
      fail("tun: ioctl(TUNGETIFF) failed");
    tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0;
  
    execute_command(1, "sysctl -w net.ipv6.conf.%s.accept_dad=0", TUN_IFACE);
  
    execute_command(1, "sysctl -w net.ipv6.conf.%s.router_solicitations=0",
                    TUN_IFACE);
  
    execute_command(1, "ip link set dev %s address %s", TUN_IFACE, LOCAL_MAC);
    execute_command(1, "ip addr add %s/24 dev %s", LOCAL_IPV4, TUN_IFACE);
    execute_command(1, "ip -6 addr add %s/120 dev %s", LOCAL_IPV6, TUN_IFACE);
    execute_command(1, "ip neigh add %s lladdr %s dev %s nud permanent",
                    REMOTE_IPV4, REMOTE_MAC, TUN_IFACE);
    execute_command(1, "ip -6 neigh add %s lladdr %s dev %s nud permanent",
                    REMOTE_IPV6, REMOTE_MAC, TUN_IFACE);
    execute_command(1, "ip link set dev %s up", TUN_IFACE);
  }
  
  #define DEV_IPV4 "172.20.20.%d"
  #define DEV_IPV6 "fe80::%02hx"
  #define DEV_MAC "aa:aa:aa:aa:aa:%02hx"
  
  static void initialize_netdevices(void)
  {
    unsigned i;
    const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "team"};
    const char* devnames[] = {"lo",
                              "sit0",
                              "bridge0",
                              "vcan0",
                              "tunl0",
                              "gre0",
                              "gretap0",
                              "ip_vti0",
                              "ip6_vti0",
                              "ip6tnl0",
                              "ip6gre0",
                              "ip6gretap0",
                              "erspan0",
                              "bond0",
                              "veth0",
                              "veth1",
                              "team0",
                              "veth0_to_bridge",
                              "veth1_to_bridge",
                              "veth0_to_bond",
                              "veth1_to_bond",
                              "veth0_to_team",
                              "veth1_to_team"};
    const char* devmasters[] = {"bridge", "bond", "team"};
  
    for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++)
      execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]);
    execute_command(0, "ip link add type veth");
  
    for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) {
      execute_command(
          0, "ip link add name %s_slave_0 type veth peer name veth0_to_%s",
          devmasters[i], devmasters[i]);
      execute_command(
          0, "ip link add name %s_slave_1 type veth peer name veth1_to_%s",
          devmasters[i], devmasters[i]);
      execute_command(0, "ip link set %s_slave_0 master %s0", devmasters[i],
                      devmasters[i]);
      execute_command(0, "ip link set %s_slave_1 master %s0", devmasters[i],
                      devmasters[i]);
      execute_command(0, "ip link set veth0_to_%s up", devmasters[i]);
      execute_command(0, "ip link set veth1_to_%s up", devmasters[i]);
    }
    execute_command(0, "ip link set bridge_slave_0 up");
    execute_command(0, "ip link set bridge_slave_1 up");
  
    for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) {
      char addr[32];
      snprintf_check(addr, sizeof(addr), DEV_IPV4, i + 10);
      execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]);
      snprintf_check(addr, sizeof(addr), DEV_IPV6, i + 10);
      execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]);
      snprintf_check(addr, sizeof(addr), DEV_MAC, i + 10);
      execute_command(0, "ip link set dev %s address %s", devnames[i], addr);
      execute_command(0, "ip link set dev %s up", devnames[i]);
    }
  }
  
  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 = 160 << 20;
    setrlimit(RLIMIT_AS, &rlim);
    rlim.rlim_cur = rlim.rlim_max = 8 << 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);
  
    if (unshare(CLONE_NEWNS)) {
    }
    if (unshare(CLONE_NEWIPC)) {
    }
    if (unshare(0x02000000)) {
    }
    if (unshare(CLONE_NEWUTS)) {
    }
    if (unshare(CLONE_SYSVSEM)) {
    }
  }
  
  static int do_sandbox_none(void)
  {
    if (unshare(CLONE_NEWPID)) {
    }
    int pid = fork();
    if (pid < 0)
      fail("sandbox fork failed");
    if (pid)
      return pid;
  
    sandbox_common();
    if (unshare(CLONE_NEWNET)) {
    }
    initialize_tun();
    initialize_netdevices();
  
    loop();
    doexit(1);
  }
  
  uint64_t r[1] = {0xffffffffffffffff};
  void loop()
  {
    long res = 0;
    res = syscall(__NR_socket, 0xa, 2, 0);
    if (res != -1)
      r[0] = res;
    *(uint64_t*)0x20000200 = htobe64(0);
    *(uint64_t*)0x20000208 = htobe64(1);
    *(uint32_t*)0x20000210 = htobe32(0xe0000002);
    *(uint16_t*)0x20000220 = htobe16(0);
    *(uint16_t*)0x20000222 = htobe16(0);
    *(uint16_t*)0x20000224 = htobe16(0);
    *(uint16_t*)0x20000226 = htobe16(1);
    *(uint16_t*)0x20000228 = 2;
    *(uint8_t*)0x2000022a = 0;
    *(uint8_t*)0x2000022b = 0;
    *(uint8_t*)0x2000022c = 0;
    *(uint32_t*)0x20000230 = 0;
    *(uint32_t*)0x20000234 = 0;
    *(uint64_t*)0x20000238 = 0;
    *(uint64_t*)0x20000240 = 0;
    *(uint64_t*)0x20000248 = 0;
    *(uint64_t*)0x20000250 = 0;
    *(uint64_t*)0x20000258 = 0;
    *(uint64_t*)0x20000260 = 0;
    *(uint64_t*)0x20000268 = 0;
    *(uint64_t*)0x20000270 = 0;
    *(uint64_t*)0x20000278 = 0;
    *(uint64_t*)0x20000280 = 0x400000000;
    *(uint64_t*)0x20000288 = 0;
    *(uint64_t*)0x20000290 = 0;
    *(uint32_t*)0x20000298 = 0;
    *(uint32_t*)0x2000029c = 0;
    *(uint8_t*)0x200002a0 = 1;
    *(uint8_t*)0x200002a1 = 0;
    *(uint8_t*)0x200002a2 = 0;
    *(uint8_t*)0x200002a3 = 3;
    *(uint8_t*)0x200002a8 = 0xfe;
    *(uint8_t*)0x200002a9 = 0x80;
    *(uint8_t*)0x200002aa = 0;
    *(uint8_t*)0x200002ab = 0;
    *(uint8_t*)0x200002ac = 0;
    *(uint8_t*)0x200002ad = 0;
    *(uint8_t*)0x200002ae = 0;
    *(uint8_t*)0x200002af = 0;
    *(uint8_t*)0x200002b0 = 0;
    *(uint8_t*)0x200002b1 = 0;
    *(uint8_t*)0x200002b2 = 0;
    *(uint8_t*)0x200002b3 = 0;
    *(uint8_t*)0x200002b4 = 0;
    *(uint8_t*)0x200002b5 = 0;
    *(uint8_t*)0x200002b6 = 0;
    *(uint8_t*)0x200002b7 = 0xaa;
    *(uint32_t*)0x200002b8 = htobe32(0);
    *(uint8_t*)0x200002bc = 0x2b;
    *(uint16_t*)0x200002c0 = 0xa;
    *(uint8_t*)0x200002c4 = 0;
    *(uint8_t*)0x200002c5 = 0;
    *(uint8_t*)0x200002c6 = 0;
    *(uint8_t*)0x200002c7 = 0;
    *(uint8_t*)0x200002c8 = 0;
    *(uint8_t*)0x200002c9 = 0;
    *(uint8_t*)0x200002ca = 0;
    *(uint8_t*)0x200002cb = 0;
    *(uint8_t*)0x200002cc = 0;
    *(uint8_t*)0x200002cd = 0;
    *(uint8_t*)0x200002ce = 0;
    *(uint8_t*)0x200002cf = 0;
    *(uint8_t*)0x200002d0 = 0;
    *(uint8_t*)0x200002d1 = 0;
    *(uint8_t*)0x200002d2 = 0;
    *(uint8_t*)0x200002d3 = 0;
    *(uint32_t*)0x200002d4 = 0;
    *(uint8_t*)0x200002d8 = 6;
    *(uint8_t*)0x200002d9 = 1;
    *(uint8_t*)0x200002da = 0;
    *(uint32_t*)0x200002dc = 0;
    *(uint32_t*)0x200002e0 = 0;
    *(uint32_t*)0x200002e4 = 0;
    syscall(__NR_setsockopt, r[0], 0x29, 0x23, 0x20000200, 0xe8);
    *(uint64_t*)0x20002000 = 0x20000100;
    *(uint16_t*)0x20000100 = 2;
    *(uint16_t*)0x20000102 = htobe16(0xc67a);
    *(uint32_t*)0x20000104 = htobe32(0);
    *(uint8_t*)0x20000108 = 0;
    *(uint8_t*)0x20000109 = 0;
    *(uint8_t*)0x2000010a = 0;
    *(uint8_t*)0x2000010b = 0;
    *(uint8_t*)0x2000010c = 0;
    *(uint8_t*)0x2000010d = 0;
    *(uint8_t*)0x2000010e = 0;
    *(uint8_t*)0x2000010f = 0;
    *(uint32_t*)0x20002008 = 0x80;
    *(uint64_t*)0x20002010 = 0x20000240;
    *(uint64_t*)0x20002018 = 0;
    *(uint64_t*)0x20002020 = 0x20000280;
    *(uint64_t*)0x20002028 = 0;
    *(uint32_t*)0x20002030 = 0;
    *(uint32_t*)0x20002038 = 0;
    syscall(__NR_sendmmsg, r[0], 0x20002000, 1, 0);
  }
  
  int main()
  {
    syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
    use_temporary_dir();
    int pid = do_sandbox_none();
    int status = 0;
    while (waitpid(pid, &status, __WALL) != pid) {
    }
    return 0;
  }
  