// https://syzkaller.appspot.com/bug?id=9a91353fc2af7d4f3085766dadc9105304c7e7c4
// 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>

#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 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);
}

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

uint64_t r[1] = {0xffffffffffffffff};

void loop(void)
{
  long res = 0;
  *(uint32_t*)0x20000040 = 0;
  *(uint32_t*)0x20000044 = 0;
  *(uint64_t*)0x20000048 = 0;
  *(uint64_t*)0x20000050 = 0;
  *(uint32_t*)0x20000058 = 0;
  *(uint32_t*)0x2000005c = 0xfb;
  *(uint64_t*)0x20000060 = 0x201a7f05;
  *(uint32_t*)0x20000068 = 0;
  *(uint32_t*)0x2000006c = 0;
  *(uint8_t*)0x20000070 = 0;
  *(uint8_t*)0x20000071 = 0;
  *(uint8_t*)0x20000072 = 0;
  *(uint8_t*)0x20000073 = 0;
  *(uint8_t*)0x20000074 = 0;
  *(uint8_t*)0x20000075 = 0;
  *(uint8_t*)0x20000076 = 0;
  *(uint8_t*)0x20000077 = 0;
  *(uint8_t*)0x20000078 = 0;
  *(uint8_t*)0x20000079 = 0;
  *(uint8_t*)0x2000007a = 0;
  *(uint8_t*)0x2000007b = 0;
  *(uint8_t*)0x2000007c = 0;
  *(uint8_t*)0x2000007d = 0;
  *(uint8_t*)0x2000007e = 0;
  *(uint8_t*)0x2000007f = 0;
  *(uint32_t*)0x20000080 = 0;
  *(uint32_t*)0x20000084 = 0;
  syscall(__NR_bpf, 5, 0x20000040, 0x48);
  memcpy((void*)0x20000040, "\x6c\x6f\x00\x96\x6f\xd6\x51\xb9\x59\xa9\xc8\x4a"
                            "\x2c\x00\xd2\x97\x04\x03\xdc\x0d",
         20);
  syscall(__NR_ioctl, -1, 0x8914, 0x20000040);
  *(uint32_t*)0x2025c000 = 2;
  *(uint32_t*)0x2025c004 = 0x70;
  *(uint8_t*)0x2025c008 = 0xe2;
  *(uint8_t*)0x2025c009 = 0;
  *(uint8_t*)0x2025c00a = 0;
  *(uint8_t*)0x2025c00b = 0;
  *(uint32_t*)0x2025c00c = 0;
  *(uint64_t*)0x2025c010 = 0;
  *(uint64_t*)0x2025c018 = 0;
  *(uint64_t*)0x2025c020 = 0;
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 0, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 1, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 2, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 3, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 4, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 5, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 6, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 7, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 8, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 9, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 10, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 11, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 12, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 13, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 14, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 15, 2);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 17, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 18, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 19, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 20, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 21, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 22, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 23, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 24, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 25, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 26, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 27, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 28, 1);
  STORE_BY_BITMASK(uint64_t, , 0x2025c028, 0, 29, 35);
  *(uint32_t*)0x2025c030 = 0;
  *(uint32_t*)0x2025c034 = 0;
  *(uint64_t*)0x2025c038 = 0;
  *(uint64_t*)0x2025c040 = 0;
  *(uint64_t*)0x2025c048 = 0;
  *(uint64_t*)0x2025c050 = 0;
  *(uint32_t*)0x2025c058 = 0;
  *(uint32_t*)0x2025c05c = 0;
  *(uint64_t*)0x2025c060 = 0;
  *(uint32_t*)0x2025c068 = 0;
  *(uint16_t*)0x2025c06c = 0;
  *(uint16_t*)0x2025c06e = 0;
  res = syscall(__NR_perf_event_open, 0x2025c000, 0, 0, -1, 0);
  if (res != -1)
    r[0] = res;
  syscall(__NR_close, r[0]);
  syscall(__NR_socket, 2, 3, 2);
  *(uint64_t*)0x20000040 = 2;
  syscall(__NR_ioctl, r[0], 0x8955, 0x20000040);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  do_sandbox_none();
  return 0;
}