// https://syzkaller.appspot.com/bug?id=a9807a63ad004f4a67c8d2d4e91e28a53b62f8eb
// 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_bpf
#define __NR_bpf 321
#endif

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;
    }
  }
}

void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  *(uint32_t*)0x4000000009c0 = 0x17;
  *(uint32_t*)0x4000000009c4 = 3;
  *(uint64_t*)0x4000000009c8 = 0x4000000004c0;
  memcpy(
      (void*)0x4000000004c0,
      "\xc3\xae\x00\xfe\x10\x01\x00\x00\x71\x10\x1a\x00\x00\x00\x00\x00\x95\x00"
      "\x00\x00\x00\x00\x00\x00\x65\xdc\xdc\x74\x19\x24\xad\xb0\xbb\xed\x87\x85"
      "\x4d\x63\x33\x2d\xbf\xef\x6c\x8f\xc8\x60\x3a\x33\xe2\xce\x10\x7b\x3a\x6e"
      "\x60\x71\x17\x04\xe3\xaa\xc5\x2c\x10\x8c\x02\x04\x00\xb3\x7f\x44\xa3\x27"
      "\x80\x8d\x50\x73\x04\x0e\x10\x54\xbc\xcb\x5c\xbe\xdb\x06\x1d\x23\x3a\xa6"
      "\x69\x13\x81\xae\x33\x7e\x5b\x39\x9d\x62\x7a\x7b\x0f\x28\xb9\xf1\xd0\x12"
      "\x79\xca\x0e\xaa\x11\xda\xea\xec\xbf\x1c\x6b\x3f\xb9\x93\xd5\x57\xa6\xe4"
      "\x71\x61\x68\x89\x08\xc6\x2c\xa0\xd9\xc5\x98\xb0\x4d\x31\xfe\x1c\x68\x3f"
      "\x64\x07\x4f\xc3\xe0\x34\x38\xfd\x5d\xfa\xd1\x88\x1e\x26\x3f\xd8\xe9\x3a"
      "\x3e\xd2\x3a\x99\x4a\xd3\x2c\xe7\xe0\x9f\xba\xca\x6b\x99\x82",
      177);
  *(uint64_t*)0x4000000009d0 = 0x400000000480;
  memcpy((void*)0x400000000480, "syzkaller\000", 10);
  *(uint32_t*)0x4000000009d8 = 6;
  *(uint32_t*)0x4000000009dc = 0;
  *(uint64_t*)0x4000000009e0 = 0;
  *(uint32_t*)0x4000000009e8 = 0;
  *(uint32_t*)0x4000000009ec = 0x48;
  memset((void*)0x4000000009f0, 0, 16);
  *(uint32_t*)0x400000000a00 = 0;
  *(uint32_t*)0x400000000a04 = 0;
  *(uint32_t*)0x400000000a08 = -1;
  *(uint32_t*)0x400000000a0c = 8;
  *(uint64_t*)0x400000000a10 = 0;
  *(uint32_t*)0x400000000a18 = 0;
  *(uint32_t*)0x400000000a1c = 0x10;
  *(uint64_t*)0x400000000a20 = 0;
  *(uint32_t*)0x400000000a28 = 0;
  *(uint32_t*)0x400000000a2c = 0;
  *(uint32_t*)0x400000000a30 = 0;
  *(uint32_t*)0x400000000a34 = 0;
  *(uint64_t*)0x400000000a38 = 0;
  *(uint64_t*)0x400000000a40 = 0;
  *(uint32_t*)0x400000000a48 = 0x10;
  *(uint32_t*)0x400000000a4c = 0;
  *(uint32_t*)0x400000000a50 = 0;
  syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x4000000009c0ul, /*size=*/0x94ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x3ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x400000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x400001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}