// https://syzkaller.appspot.com/bug?id=00fadf9a6326e13098672b601d57f644cae380e9
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

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 bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      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;
  memcpy((void*)0x200000c0, "cgroup.controllers\000", 19);
  syscall(__NR_openat, -1, 0x200000c0ul, 0ul, 0ul);
  memcpy((void*)0x20000100, "/dev/net/tun\000", 13);
  res = syscall(__NR_openat, 0xffffffffffffff9cul, 0x20000100ul, 0ul, 0ul);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x200000c0, "syzkaller1\000\000\000\000\000\000", 16);
  syscall(__NR_ioctl, r[0], 0x400454ca, 0x200000c0ul);
  res = syscall(__NR_socket, 0xaul, 1ul, 0);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000980,
         "filter\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000",
         32);
  *(uint32_t*)0x200009a0 = 0xe;
  *(uint32_t*)0x200009a4 = 4;
  *(uint32_t*)0x200009a8 = 0x3c8;
  *(uint32_t*)0x200009ac = 0xd0;
  *(uint32_t*)0x200009b0 = 0;
  *(uint32_t*)0x200009b4 = 0x1f8;
  *(uint32_t*)0x200009b8 = 0;
  *(uint32_t*)0x200009bc = 0xd0;
  *(uint32_t*)0x200009c0 = 0x2c0;
  *(uint32_t*)0x200009c4 = 0x2f8;
  *(uint32_t*)0x200009c8 = 0x2f8;
  *(uint32_t*)0x200009cc = 0x2f8;
  *(uint32_t*)0x200009d0 = 0x2c0;
  *(uint32_t*)0x200009d4 = 4;
  *(uint64_t*)0x200009d8 = 0;
  memset((void*)0x200009e0, 0, 136);
  *(uint32_t*)0x20000a68 = 0;
  *(uint16_t*)0x20000a6c = 0xa8;
  *(uint16_t*)0x20000a6e = 0x108;
  *(uint32_t*)0x20000a70 = 0;
  *(uint64_t*)0x20000a78 = 0;
  *(uint64_t*)0x20000a80 = 0;
  *(uint16_t*)0x20000a88 = 0x60;
  memcpy((void*)0x20000a8a,
         "HMARK\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000aa7 = 0;
  *(uint32_t*)0x20000aa8 = htobe32(-1);
  *(uint32_t*)0x20000ab8 = htobe32(0);
  *(uint32_t*)0x20000abc = htobe32(0);
  *(uint32_t*)0x20000ac0 = htobe32(0);
  *(uint32_t*)0x20000ac4 = htobe32(0);
  *(uint16_t*)0x20000ac8 = htobe16(0);
  *(uint16_t*)0x20000aca = htobe16(0);
  *(uint16_t*)0x20000acc = htobe16(0);
  *(uint16_t*)0x20000ace = htobe16(0);
  *(uint32_t*)0x20000ad0 = 0;
  *(uint16_t*)0x20000ad4 = 0;
  *(uint32_t*)0x20000ad8 = 0;
  *(uint32_t*)0x20000adc = 4;
  *(uint32_t*)0x20000ae0 = 0;
  memset((void*)0x20000ae8, 0, 136);
  *(uint32_t*)0x20000b70 = 0;
  *(uint16_t*)0x20000b74 = 0xa8;
  *(uint16_t*)0x20000b76 = 0xf0;
  *(uint32_t*)0x20000b78 = 0;
  *(uint64_t*)0x20000b80 = 0;
  *(uint64_t*)0x20000b88 = 0;
  *(uint16_t*)0x20000b90 = 0x48;
  memcpy((void*)0x20000b92,
         "TEE\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000baf = 1;
  *(uint8_t*)0x20000bb0 = -1;
  *(uint8_t*)0x20000bb1 = 2;
  memset((void*)0x20000bb2, 0, 13);
  *(uint8_t*)0x20000bbf = 1;
  memcpy((void*)0x20000bc0, "netdevsim0\000\000\000\000\000\000", 16);
  *(uint64_t*)0x20000bd0 = 0;
  *(uint8_t*)0x20000bd8 = 0xfe;
  *(uint8_t*)0x20000bd9 = 0x80;
  memset((void*)0x20000bda, 0, 13);
  *(uint8_t*)0x20000be7 = 0xaa;
  *(uint8_t*)0x20000be8 = 0xfe;
  *(uint8_t*)0x20000be9 = 0x80;
  memset((void*)0x20000bea, 0, 13);
  *(uint8_t*)0x20000bf7 = 0;
  *(uint32_t*)0x20000bf8 = htobe32(0);
  *(uint32_t*)0x20000bfc = htobe32(0);
  *(uint32_t*)0x20000c00 = htobe32(0);
  *(uint32_t*)0x20000c04 = htobe32(0);
  *(uint32_t*)0x20000c08 = htobe32(0);
  *(uint32_t*)0x20000c0c = htobe32(0);
  *(uint32_t*)0x20000c10 = htobe32(0);
  *(uint32_t*)0x20000c14 = htobe32(0);
  memcpy((void*)0x20000c18, "vlan1\000\000\000\000\000\000\000\000\000\000\000",
         16);
  memcpy((void*)0x20000c28, "ipvlan0\000\000\000\000\000\000\000\000\000", 16);
  *(uint8_t*)0x20000c38 = 0;
  *(uint8_t*)0x20000c48 = 0;
  *(uint16_t*)0x20000c58 = 0x11;
  *(uint8_t*)0x20000c5a = 0;
  *(uint8_t*)0x20000c5b = 0;
  *(uint8_t*)0x20000c5c = 0;
  *(uint32_t*)0x20000c60 = 0;
  *(uint16_t*)0x20000c64 = 0xd8;
  *(uint16_t*)0x20000c66 = 0x100;
  *(uint32_t*)0x20000c68 = 0;
  *(uint64_t*)0x20000c70 = 0;
  *(uint64_t*)0x20000c78 = 0;
  *(uint16_t*)0x20000c80 = 0x30;
  memcpy((void*)0x20000c82,
         "l2tp\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000c9f = 0;
  *(uint32_t*)0x20000ca0 = 0;
  *(uint32_t*)0x20000ca4 = 0;
  *(uint8_t*)0x20000ca8 = 2;
  *(uint8_t*)0x20000ca9 = 0;
  *(uint8_t*)0x20000caa = 0xc;
  *(uint16_t*)0x20000cb0 = 0x28;
  memcpy((void*)0x20000cb2,
         "REJECT\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000ccf = 0;
  *(uint32_t*)0x20000cd0 = 0;
  memset((void*)0x20000cd8, 0, 136);
  *(uint32_t*)0x20000d60 = 0;
  *(uint16_t*)0x20000d64 = 0xa8;
  *(uint16_t*)0x20000d66 = 0xd0;
  *(uint32_t*)0x20000d68 = 0;
  *(uint64_t*)0x20000d70 = 0;
  *(uint64_t*)0x20000d78 = 0;
  *(uint16_t*)0x20000d80 = 0x28;
  memset((void*)0x20000d82, 0, 29);
  *(uint8_t*)0x20000d9f = 0;
  *(uint32_t*)0x20000da0 = 0xfffffffe;
  syscall(__NR_setsockopt, r[1], 0x29, 0x40, 0x20000980ul, 0x428ul);
  res = syscall(__NR_socket, 0x10ul, 3ul, 0xc);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x200004c0 = 0;
  *(uint32_t*)0x200004c8 = 0;
  *(uint64_t*)0x200004d0 = 0x20000480;
  *(uint64_t*)0x20000480 = 0x20000400;
  memcpy((void*)0x20000400,
         "\x2c\x00\x00\x00\x00\x0b\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x0a"
         "\x00\x00\x00\x08\x00\x02\x40\x00\x00\x00\x02\x08\x00\x03\x40\x00\x00"
         "\x00\x01\x05\x00\x01\x00\x00\x68\x0d\xd1",
         44);
  *(uint64_t*)0x20000488 = 0x2c;
  *(uint64_t*)0x200004d8 = 1;
  *(uint64_t*)0x200004e0 = 0;
  *(uint64_t*)0x200004e8 = 0;
  *(uint32_t*)0x200004f0 = 0;
  syscall(__NR_sendmsg, r[2], 0x200004c0ul, 0ul);
}
int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  loop();
  return 0;
}