// https://syzkaller.appspot.com/bug?id=3db7efb822fab96b6aa11322e3adedba7bc256b4
// 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>

#ifndef __NR_ioctl
#define __NR_ioctl 54
#endif
#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_openat
#define __NR_openat 322
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

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 (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 15000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$comedi arguments: [
  //    fd: const = 0xffffff9c (4 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 63 6f 6d 65 64 69 31 00} (length 0xd)
  //    }
  //    flags: open_flags = 0x2180 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_comedi
  memcpy((void*)0x20000040, "/dev/comedi1\000", 13);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000040,
                /*flags=O_NOCTTY|O_EXCL|FASYNC*/ 0x2180, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$COMEDI_DEVCONFIG arguments: [
  //    fd: fd_comedi (resource)
  //    cmd: const = 0x40946400 (4 bytes)
  //    arg: ptr[in, comedi_devconfig] {
  //      comedi_devconfig {
  //        board_name: buffer: {63 6f 6d 65 64 69 5f 70 61 72 70 6f 72 74 00 00
  //        00 00 00 00} (length 0x14) options: array[int32] {
  //          int32 = 0x2f00 (4 bytes)
  //          int32 = 0x5 (4 bytes)
  //          int32 = 0xd09a (4 bytes)
  //          int32 = 0xffffffff (4 bytes)
  //          int32 = 0x3 (4 bytes)
  //          int32 = 0xfffffffe (4 bytes)
  //          int32 = 0x20000004 (4 bytes)
  //          int32 = 0x3 (4 bytes)
  //          int32 = 0xffe (4 bytes)
  //          int32 = 0x7fffffff (4 bytes)
  //          int32 = 0xc (4 bytes)
  //          int32 = 0x2 (4 bytes)
  //          int32 = 0x4 (4 bytes)
  //          int32 = 0x8 (4 bytes)
  //          int32 = 0xffff (4 bytes)
  //          int32 = 0x6 (4 bytes)
  //          int32 = 0x5 (4 bytes)
  //          int32 = 0x7ff (4 bytes)
  //          int32 = 0x830 (4 bytes)
  //          int32 = 0x8 (4 bytes)
  //          int32 = 0x10000 (4 bytes)
  //          int32 = 0x9 (4 bytes)
  //          int32 = 0x800 (4 bytes)
  //          int32 = 0x101 (4 bytes)
  //          int32 = 0x2 (4 bytes)
  //          int32 = 0x8001 (4 bytes)
  //          int32 = 0x7 (4 bytes)
  //          int32 = 0x3 (4 bytes)
  //          int32 = 0x4 (4 bytes)
  //          int32 = 0x5 (4 bytes)
  //          int32 = 0x70f (4 bytes)
  //          int32 = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //  ]
  memcpy((void*)0x20000300, "comedi_parport\000\000\000\000\000\000", 20);
  *(uint32_t*)0x20000314 = 0x2f00;
  *(uint32_t*)0x20000318 = 5;
  *(uint32_t*)0x2000031c = 0xd09a;
  *(uint32_t*)0x20000320 = -1;
  *(uint32_t*)0x20000324 = 3;
  *(uint32_t*)0x20000328 = 0xfffffffe;
  *(uint32_t*)0x2000032c = 0x20000004;
  *(uint32_t*)0x20000330 = 3;
  *(uint32_t*)0x20000334 = 0xffe;
  *(uint32_t*)0x20000338 = 0x7fffffff;
  *(uint32_t*)0x2000033c = 0xc;
  *(uint32_t*)0x20000340 = 2;
  *(uint32_t*)0x20000344 = 4;
  *(uint32_t*)0x20000348 = 8;
  *(uint32_t*)0x2000034c = 0xffff;
  *(uint32_t*)0x20000350 = 6;
  *(uint32_t*)0x20000354 = 5;
  *(uint32_t*)0x20000358 = 0x7ff;
  *(uint32_t*)0x2000035c = 0x830;
  *(uint32_t*)0x20000360 = 8;
  *(uint32_t*)0x20000364 = 0x10000;
  *(uint32_t*)0x20000368 = 9;
  *(uint32_t*)0x2000036c = 0x800;
  *(uint32_t*)0x20000370 = 0x101;
  *(uint32_t*)0x20000374 = 2;
  *(uint32_t*)0x20000378 = 0x8001;
  *(uint32_t*)0x2000037c = 7;
  *(uint32_t*)0x20000380 = 3;
  *(uint32_t*)0x20000384 = 4;
  *(uint32_t*)0x20000388 = 5;
  *(uint32_t*)0x2000038c = 0x70f;
  *(uint32_t*)0x20000390 = 0;
  syscall(__NR_ioctl, /*fd=*/(intptr_t)r[0], /*cmd=*/0x40946400,
          /*arg=*/0x20000300);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x20000000, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x21000000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32,
          /*fd=*/(intptr_t)-1, /*offset=*/0);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}