// https://syzkaller.appspot.com/bug?id=797cd651dd0d9bd921e4fa51b792f5afdc3f390f
// 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 (;;) {
      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;
    }
  }
}

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  *(uint32_t*)0x2000e000 = 0xe;
  *(uint32_t*)0x2000e004 = 4;
  *(uint64_t*)0x2000e008 = 0x20000240;
  memcpy(
      (void*)0x20000240,
      "\xb4\x05\x00\x00\x00\x00\x00\x00\x61\x10\x60\x00\x00\x00\x00\x00\xc6\x00"
      "\x00\x00\x00\x00\x00\x00\x95\x00\x00\x02\x00\x00\x00\x00\x8e\x8a\x8e\xfe"
      "\xbc\xa8\xf3\x68\x4e\xcd\x9f\x2e\x45\x11\x69\x85\xe4\xad\x3a\x49\xae\xfe"
      "\xba\xe0\xab\x94\x69\x7f\x19\x59\xc9\x27\x4a\xe1\x77\x81\xe6\x41\x70\x2d"
      "\xb3\x47\xf9\x1b\x89\x88\xba\x06\xf1\xd8\xc7\x73\xca\x9a\x0e\xc4\x32\xe3"
      "\xe3\xd1\x00\x55\x35\x69\xf8\xc6\x28\xa5\x43\xb8\x66\x7d\xe5\x73\xbd\x9f"
      "\x88\x2d\xf5\xff\x82\x70\x15\x22\x36\x50\xe1\x1e\xad\xda\x18\x7a\x70\xe6"
      "\x50\x57\x03\x93\xc2\xdb\x64\x5d\x74\x82\x1c\x24\x35\x4a\xfc\x79\x1a\x4e"
      "\x40\xc4\x3a\xd6\x78\xbf\xf9\x27\xb2\x89\x72\x67\xee\xab\xb7\xfb\x73\x4f"
      "\x58\x3c\x05\x00\x00\x00\x77\xbd\x77\x06\x8e\x5d\x80\x59\xff\xa6\x63\xb8"
      "\x44\x18\x13\x9d\x0a\x10\x71\xc0\xe0\xaa\x2e\x1f\xbb\x67\x3f\xb0\x09\x57"
      "\x72\x44\x9a\xd7\x31\xfb\xf5\x8d\x16\x4c\xc1\x4c\x60\x0c\x67\x18\xeb\x45"
      "\x11\x13\x56\x12\xdb\xe4\x28\xdb\x30\x2c\x74\x1b\xb7\x90\x44\x31\x26\x9f"
      "\x3e\x50\x41\x72\x09\xd4\x45\x18\xaa\xea\xb0\xf2\xab\x7f\x36\xfc\x21\xd3"
      "\x2f\x38\xeb\x2a\xe4\xc6\x44\x0a\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x52\xad\xbb\x3c\xeb\x41\x91\x82\xde\xf8\x76\xfe\x0a\x6d\x91\x31"
      "\xa5\xf8\xc8\x6b\x90\xca\x01\x51\x5d\x22\xb6\x9b\x12\xf1\x0d\x2a\x85\x27"
      "\x3a\x79\xaf\xd4\xe9\x99\x4c\xad\xa5\x4a\xd8\x00\x85\x75\x5b\x33\x67\x8c"
      "\x3a\x9b\x3c\xa8",
      328);
  *(uint64_t*)0x2000e010 = 0x20003ff6;
  memcpy((void*)0x20003ff6, "GPL\000", 4);
  *(uint32_t*)0x2000e018 = 4;
  *(uint32_t*)0x2000e01c = 0xfd90;
  *(uint64_t*)0x2000e020 = 0x2000cf3d;
  *(uint32_t*)0x2000e028 = 0;
  *(uint32_t*)0x2000e02c = 0;
  memset((void*)0x2000e030, 0, 16);
  *(uint32_t*)0x2000e040 = 0;
  *(uint32_t*)0x2000e044 = 0;
  *(uint32_t*)0x2000e048 = -1;
  *(uint32_t*)0x2000e04c = 8;
  *(uint64_t*)0x2000e050 = 0x20000000;
  *(uint32_t*)0x20000000 = 0;
  *(uint32_t*)0x20000004 = 0;
  *(uint32_t*)0x2000e058 = 0x366;
  *(uint32_t*)0x2000e05c = 0x10;
  *(uint64_t*)0x2000e060 = 0x20000000;
  *(uint32_t*)0x20000000 = 0;
  *(uint32_t*)0x20000004 = 0;
  *(uint32_t*)0x20000008 = 0;
  *(uint32_t*)0x2000000c = 0;
  *(uint32_t*)0x2000e068 = 0x187;
  *(uint32_t*)0x2000e06c = 0;
  *(uint32_t*)0x2000e070 = -1;
  res = syscall(__NR_bpf, 5ul, 0x2000e000ul, 0x48ul);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x20000100 = 0x12;
  *(uint32_t*)0x20000104 = 4;
  *(uint32_t*)0x20000108 = 8;
  *(uint32_t*)0x2000010c = 4;
  *(uint32_t*)0x20000110 = 0;
  *(uint32_t*)0x20000114 = -1;
  *(uint32_t*)0x20000118 = 0;
  memset((void*)0x2000011c, 0, 16);
  *(uint32_t*)0x2000012c = 0;
  *(uint32_t*)0x20000130 = -1;
  *(uint32_t*)0x20000134 = 0;
  *(uint32_t*)0x20000138 = 0;
  *(uint32_t*)0x2000013c = 0;
  res = syscall(__NR_bpf, 0x100000000000000ul, 0x20000100ul, 0x40ul);
  if (res != -1)
    r[1] = res;
  *(uint32_t*)0x20000080 = r[1];
  *(uint32_t*)0x20000084 = r[0];
  *(uint32_t*)0x20000088 = 5;
  *(uint32_t*)0x2000008c = 0;
  syscall(__NR_bpf, 8ul, 0x20000080ul, 0x10ul);
  res = syscall(__NR_socket, 1ul, 5ul, 0);
  if (res != -1)
    r[2] = res;
  *(uint32_t*)0x20000200 = r[1];
  *(uint64_t*)0x20000208 = 0x20000140;
  *(uint64_t*)0x20000210 = 0x200000c0;
  *(uint32_t*)0x200000c0 = r[2];
  *(uint64_t*)0x20000218 = 0;
  syscall(__NR_bpf, 2ul, 0x20000200ul, 0x20ul);
}
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);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}