// https://syzkaller.appspot.com/bug?id=6f928b7ab5364f58ff843f8db69a19f13684071d
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <sys/types.h>

#include <pwd.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/endian.h>
#include <sys/syscall.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

static void kill_and_wait(int pid, int* status)
{
  kill(pid, SIGKILL);
  while (waitpid(-1, status, 0) != pid) {
  }
}

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 execute_one(void);

#define WAIT_FLAGS 0

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  memcpy((void*)0x200000000540, "/dev/pf\000", 8);
  res = syscall(SYS_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000540ul, /*flags=O_RDWR*/ 2ul, /*mode=*/0ul);
  if (res != -1)
    r[0] = res;
  res = syscall(SYS_socket, /*domain=AF_INET*/ 2ul, /*type=SOCK_STREAM*/ 1ul,
                /*proto=*/0);
  if (res != -1)
    r[1] = res;
  *(uint8_t*)0x2000000001c0 = 0x10;
  *(uint8_t*)0x2000000001c1 = 2;
  *(uint16_t*)0x2000000001c2 = htobe16(0x4e22);
  *(uint32_t*)0x2000000001c4 = htobe32(0x7f000001);
  memset((void*)0x2000000001c8, 0, 8);
  syscall(SYS_bind, /*fd=*/r[1], /*addr=*/0x2000000001c0ul, /*addrlen=*/0x10ul);
  *(uint8_t*)0x2000000000c0 = 0x21;
  *(uint8_t*)0x2000000000c1 = 2;
  *(uint16_t*)0x2000000000c2 = htobe16(0x4e22);
  *(uint32_t*)0x2000000000c4 = htobe32(0x7f000001);
  memset((void*)0x2000000000c8, 0, 8);
  syscall(SYS_connect, /*fd=*/r[1], /*addr=*/0x2000000000c0ul,
          /*addrlen=*/0x10ul);
  memcpy((void*)0x200000000380,
         "\x8e\x74\x14\x40\xcb\xec\x08\xde\xd2\xc5\xec\xa7\xd3\xd5\x09\x8a\x1e"
         "\xeb\x19\xd5",
         20);
  syscall(SYS_sendto, /*fd=*/r[1], /*buf=*/0x200000000380ul, /*len=*/0x14ul,
          /*f=MSG_NOSIGNAL|MSG_DONTROUTE|MSG_OOB*/ 0x20005ul, /*addr=*/0ul,
          /*addrlen=*/0ul);
  *(uint64_t*)0x200000000700 = 0;
  *(uint32_t*)0x200000000708 = 0;
  *(uint64_t*)0x200000000710 = 0x200000000580;
  *(uint64_t*)0x200000000580 = 0x200000000040;
  *(uint64_t*)0x200000000588 = 0x25;
  *(uint64_t*)0x200000000718 = 1;
  *(uint64_t*)0x200000000720 = 0;
  *(uint64_t*)0x200000000728 = 0;
  *(uint32_t*)0x200000000730 = 0;
  syscall(SYS_recvmsg, /*fd=*/r[1], /*msg=*/0x200000000700ul,
          /*f=MSG_DONTWAIT*/ 0x80ul);
  memcpy((void*)0x2000000000c0, "/dev/pf\000", 8);
  res =
      syscall(SYS_openat, /*fd=*/0xffffffffffffff9cul,
              /*file=*/0x2000000000c0ul, /*flags=O_WRONLY*/ 1ul, /*mode=*/0ul);
  if (res != -1)
    r[2] = res;
  syscall(SYS_ioctl, /*fd=*/r[2], /*cmd=*/0xc4704433ul,
          /*arg=*/0x200000000040ul);
  memset((void*)0x200000000480, 2, 1);
  syscall(SYS_ioctl, /*fd=*/-1, /*cmd=*/0xc4704434ul, /*arg=*/0x200000000480ul);
  syscall(SYS_ioctl, /*fd=*/r[0], /*cmd=*/0xc4704434ul,
          /*arg=*/0x200000000040ul);
}
int main(void)
{
  syscall(SYS_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x1012ul, /*fd=*/-1,
          /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}