// https://syzkaller.appspot.com/bug?id=f0c5aa5cde74597a72004792732e773881333694
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.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/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <util.h>

static unsigned long long procid;

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;
}

#define __syscall syscall

static uintptr_t syz_open_pts(void)
{
  int master, slave;
  if (openpty(&master, &slave, NULL, NULL, NULL) == -1)
    return -1;
  if (dup2(master, master + 100) != -1)
    close(master);
  return slave;
}

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 (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      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;
  res = -1;
  res = syz_open_pts();
  if (res != -1)
    r[0] = res;
  syz_open_pts();
  *(uint16_t*)0x20000280 = 0;
  *(uint16_t*)0x20000282 = 0;
  *(uint64_t*)0x20000288 = 0;
  *(uint64_t*)0x20000290 = 0x100000000;
  *(uint32_t*)0x20000298 = 0;
  syscall(SYS_fcntl, r[0], 9ul, 0x20000280ul);
  syscall(SYS_close, r[0]);
  syz_open_pts();
  memcpy((void*)0x20000200, "/dev/bpf\000", 9);
  res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x20000200ul, 0x4000000001ul,
                0ul);
  if (res != -1)
    r[1] = res;
  syscall(SYS_ioctl, r[1], 0x80104277ul, 0ul);
  *(uint16_t*)0x20000040 = 2;
  *(uint16_t*)0x20000042 = htobe16(0x4e21 + procid * 4);
  memset((void*)0x20000044, 0, 8);
  syscall(SYS_sendto, -1, 0ul, 0ul, 6ul, 0x20000040ul, 0xcul);
  memcpy((void*)0x200000c0, "tap", 3);
  *(uint8_t*)0x200000c3 = 0x30 + procid * 1;
  *(uint8_t*)0x200000c4 = 0;
  syscall(SYS_ioctl, r[1], 0x8020426cul, 0x200000c0ul);
  syscall(SYS_pwrite, r[1], 0ul, 0ul, 0ul);
  memset((void*)0x20000080, 47, 1);
  res = syscall(SYS_openat, -1, 0x20000080ul, 0ul, 0ul);
  if (res != -1)
    r[2] = res;
  syscall(SYS_fchdir, r[2]);
  *(uint32_t*)0x20000240 = 7;
  *(uint32_t*)0x20000244 = 4;
  *(uint32_t*)0x20000248 = 0;
  *(uint32_t*)0x2000024c = 0xa1a;
  memcpy((void*)0x20000250,
         "\xda\x73\xf6\x6c\x09\xbd\x6b\xc1\x3c\x41\x85\xd1\x57\xc9\x03\x52\xde"
         "\x00\x42\x12",
         20);
  *(uint32_t*)0x20000264 = 0xb662;
  *(uint32_t*)0x20000268 = 3;
  syscall(SYS_ioctl, r[2], 0x802c7415ul, 0x20000240ul);
  memcpy((void*)0x200000c0, "tap", 3);
  *(uint8_t*)0x200000c3 = 0x30 + procid * 1;
  *(uint8_t*)0x200000c4 = 0;
  syscall(SYS_ioctl, -1, 0x8020426cul, 0x200000c0ul);
  memcpy((void*)0x20000100,
         "\x24\x4e\x7f\x3c\xb0\x62\x24\xb0\x38\x6e\x51\x10\xdb\x69", 14);
  syscall(SYS_pwrite, -1, 0x20000100ul, 0xeul, 0ul);
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}