// https://syzkaller.appspot.com/bug?id=32fd4b363b76beed9afc7768209924cacd62999c
// 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 unsigned long long procid;

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 < 5000)
        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$auto_tracing_fops_trace arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 73 79 73 2f 6b 65 72 6e 65 6c 2f 74 72 61 63 69 6e 67 2f
  //      70 65 72 5f 63 70 75 2f 63 70 75 31 2f 74 72 61 63 65 00} (length
  //      0x27)
  //    }
  //    flags: open_flags = 0x40200 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_tracing_fops_trace
  memcpy((void*)0x2000000000c0, "/sys/kernel/tracing/per_cpu/cpu1/trace\000",
         39);
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x2000000000c0ul,
          /*flags=O_TRUNC|O_NOATIME*/ 0x40200, /*mode=*/0);
  //  openat$auto_buffer_subbuf_size_fops_trace arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 73 79 73 2f 6b 65 72 6e 65 6c 2f 64 65 62 75 67 2f 74 72
  //      61 63 69 6e 67 2f 62 75 66 66 65 72 5f 73 75 62 62 75 66 5f 73 69 7a
  //      65 5f 6b 62 00} (length 0x30)
  //    }
  //    flags: open_flags = 0x2401 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_buffer_subbuf_size_fops_trace
  memcpy((void*)0x200000000180,
         "/sys/kernel/debug/tracing/buffer_subbuf_size_kb\000", 48);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000180ul,
                /*flags=FASYNC|O_APPEND|O_WRONLY*/ 0x2401, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write$auto arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {39 00 64 31 4c f0 15 ba a1 37 3d 28 18 dd ff ec 0b b5 5e a1
  //      2f 5b 76 76 19 00 7f 30 a3 30 c7 9d 1f 5d f8 e0 34 e7 73 9a d3 48 d3
  //      46 81 39 2b 90 53 10 b2 08 f8 29 e4 49 55 09 b8 0d 9a 8e 27 51 fb b5
  //      49 0f 96 3b c7 5c 32 56 01 67 f8 ce bb 9d a2 63 32 00 7f a1 3a 07 78
  //      bc 17 de 0e 3c 00 00 00 00 00 00 00 06 c8 f4 df cc 9b d7 44 d7 41 52
  //      71} (length 0x71)
  //    }
  //    count: intptr = 0x40 (8 bytes)
  //  ]
  memcpy((void*)0x200000000280,
         "9\000d1L\360\025\272\2417=(\030\335\377\354\v\265^\241/"
         "[vv\031\000\1770\2430\307\235\037]\370\3404\347s\232\323H\323F\2019+"
         "\220S\020\262\b\370)\344IU\t\270\r\232\216\'Q\373\265I\017\226;"
         "\307\\2V\001g\370\316\273\235\242c2\000\177\241:\ax\274\027\336\016<"
         "\000\000\000\000\000\000\000\006\310\364\337\314\233\327D\327ARq",
         113);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000280ul, /*count=*/0x40ul);
  for (int i = 0; i < 64; i++) {
    syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000280ul,
            /*count=*/0x40ul);
  }
  //  openat$auto_kvm_chardev_ops_kvm_main arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: nil
  //    flags: open_flags = 0xe0180 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_kvm_chardev_ops_kvm_main
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0ul,
          /*flags=O_NOFOLLOW|O_NOCTTY|O_NOATIME|O_EXCL|O_CLOEXEC*/ 0xe0180,
          /*mode=*/0);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}