// https://syzkaller.appspot.com/bug?id=4e947674d10b0fb0cb94d4d723989cee439a71d6
// 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_arp.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/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/if.h>
#include <linux/if_ether.h>
#include <linux/if_tun.h>
#include <linux/ip.h>
#include <linux/tcp.h>

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)
    exit(1);
  if ((size_t)rv >= size)
    exit(1);
}

#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)
      exit(1);
  }
}

#define DEV_IPV4 "172.20.20.%d"
#define DEV_IPV6 "fe80::%02hx"
#define DEV_MAC "aa:aa:aa:aa:aa:%02hx"

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);
}
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 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)) {
  }
}

int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

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();
  if (unshare(CLONE_NEWNET)) {
  }
  initialize_netdevices();
  loop();
  exit(1);
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void loop(void)
{
  long res = 0;
  res = syscall(__NR_socket, 0x10, 3, 6);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20000140 = 0x20000000;
  *(uint16_t*)0x20000000 = 0x10;
  *(uint16_t*)0x20000002 = 0;
  *(uint32_t*)0x20000004 = 0;
  *(uint32_t*)0x20000008 = 0;
  *(uint32_t*)0x20000148 = 0xc;
  *(uint64_t*)0x20000150 = 0x200000c0;
  *(uint64_t*)0x200000c0 = 0x20001040;
  *(uint32_t*)0x20001040 = 0xb8;
  *(uint16_t*)0x20001044 = 0x19;
  *(uint16_t*)0x20001046 = 0x101;
  *(uint32_t*)0x20001048 = 0;
  *(uint32_t*)0x2000104c = 0;
  *(uint32_t*)0x20001050 = htobe32(0xe0000001);
  *(uint8_t*)0x20001060 = -1;
  *(uint8_t*)0x20001061 = 2;
  *(uint8_t*)0x20001062 = 0;
  *(uint8_t*)0x20001063 = 0;
  *(uint8_t*)0x20001064 = 0;
  *(uint8_t*)0x20001065 = 0;
  *(uint8_t*)0x20001066 = 0;
  *(uint8_t*)0x20001067 = 0;
  *(uint8_t*)0x20001068 = 0;
  *(uint8_t*)0x20001069 = 0;
  *(uint8_t*)0x2000106a = 0;
  *(uint8_t*)0x2000106b = 0;
  *(uint8_t*)0x2000106c = 0;
  *(uint8_t*)0x2000106d = 0;
  *(uint8_t*)0x2000106e = 0;
  *(uint8_t*)0x2000106f = 1;
  *(uint16_t*)0x20001070 = htobe16(0);
  *(uint16_t*)0x20001072 = htobe16(0);
  *(uint16_t*)0x20001074 = htobe16(0);
  *(uint16_t*)0x20001076 = htobe16(0);
  *(uint16_t*)0x20001078 = 0xa;
  *(uint8_t*)0x2000107a = 0;
  *(uint8_t*)0x2000107b = -1;
  *(uint8_t*)0x2000107c = 0;
  *(uint32_t*)0x20001080 = 0;
  *(uint32_t*)0x20001084 = 0;
  *(uint64_t*)0x20001088 = 0;
  *(uint64_t*)0x20001090 = 0;
  *(uint64_t*)0x20001098 = 0;
  *(uint64_t*)0x200010a0 = 0;
  *(uint64_t*)0x200010a8 = 0;
  *(uint64_t*)0x200010b0 = 0;
  *(uint64_t*)0x200010b8 = 0;
  *(uint64_t*)0x200010c0 = 0;
  *(uint64_t*)0x200010c8 = 0;
  *(uint64_t*)0x200010d0 = 0;
  *(uint64_t*)0x200010d8 = 0;
  *(uint64_t*)0x200010e0 = 0;
  *(uint32_t*)0x200010e8 = 0;
  *(uint32_t*)0x200010ec = 0;
  *(uint8_t*)0x200010f0 = 0;
  *(uint8_t*)0x200010f1 = 0;
  *(uint8_t*)0x200010f2 = 0;
  *(uint8_t*)0x200010f3 = 0;
  *(uint64_t*)0x200000c8 = 0x1ff;
  *(uint64_t*)0x20000158 = 1;
  *(uint64_t*)0x20000160 = 0;
  *(uint64_t*)0x20000168 = 0;
  *(uint32_t*)0x20000170 = 0;
  syscall(__NR_sendmsg, r[0], 0x20000140, 0);
  res = syscall(__NR_socketpair, 1, 2, 0, 0x20000080);
  if (res != -1)
    r[1] = *(uint32_t*)0x20000084;
  res = syscall(__NR_socket, 2, 0x200000002, 0x88);
  if (res != -1)
    r[2] = res;
  *(uint16_t*)0x20000000 = 2;
  *(uint16_t*)0x20000002 = htobe16(0x4e21);
  *(uint32_t*)0x20000004 = htobe32(0);
  *(uint8_t*)0x20000008 = 0;
  *(uint8_t*)0x20000009 = 0;
  *(uint8_t*)0x2000000a = 0;
  *(uint8_t*)0x2000000b = 0;
  *(uint8_t*)0x2000000c = 0;
  *(uint8_t*)0x2000000d = 0;
  *(uint8_t*)0x2000000e = 0;
  *(uint8_t*)0x2000000f = 0;
  syscall(__NR_bind, r[2], 0x20000000, 0x10);
  res = syscall(__NR_dup2, r[2], r[1]);
  if (res != -1)
    r[3] = res;
  *(uint16_t*)0x200000c0 = 2;
  *(uint16_t*)0x200000c2 = htobe16(0x4e21);
  *(uint8_t*)0x200000c4 = 0xac;
  *(uint8_t*)0x200000c5 = 0x14;
  *(uint8_t*)0x200000c6 = 0x14;
  *(uint8_t*)0x200000c7 = 0xb;
  *(uint8_t*)0x200000c8 = 0;
  *(uint8_t*)0x200000c9 = 0;
  *(uint8_t*)0x200000ca = 0;
  *(uint8_t*)0x200000cb = 0;
  *(uint8_t*)0x200000cc = 0;
  *(uint8_t*)0x200000cd = 0;
  *(uint8_t*)0x200000ce = 0;
  *(uint8_t*)0x200000cf = 0;
  syscall(__NR_sendto, r[3], 0x20000140, 0, 0x8000, 0x200000c0, 0x10);
  *(uint16_t*)0x20000140 = 2;
  *(uint16_t*)0x20000142 = htobe16(0);
  *(uint32_t*)0x20000144 = htobe32(-1);
  *(uint8_t*)0x20000148 = 0;
  *(uint8_t*)0x20000149 = 0;
  *(uint8_t*)0x2000014a = 0;
  *(uint8_t*)0x2000014b = 0;
  *(uint8_t*)0x2000014c = 0;
  *(uint8_t*)0x2000014d = 0;
  *(uint8_t*)0x2000014e = 0;
  *(uint8_t*)0x2000014f = 0;
  syscall(__NR_sendto, r[2], 0x20000180, 0, 0, 0x20000140, 0x10);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  do_sandbox_none();
  return 0;
}