// 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 = 0x20000400;
  memcpy(
      (void*)0x20000400,
      "\xb4\x05\x00\x00\x00\x00\x00\x00\x61\x10\x58\x00\x00\x00\x00\x00\xc6\x00"
      "\x00\x00\x00\x00\x00\x00\x95\x00\x00\x02\x00\x00\x00\x00\x3f\x20\x31\x84"
      "\x23\xfb\xcd\xc4\xca\xf5\xce\xcc\x8c\x41\xd6\x6d\x1e\x8d\x08\xdc\x03\x63"
      "\x99\x12\xea\xdc\xc2\xd1\xd4\x55\xac\x64\x7a\x72\x65\x55\x9c\xcd\x4d\xff"
      "\x72\x3f\x30\x58\x06\x46\x92\x47\x42\xcd\x84\x83\x08\xe1\x23\x08\xfc\xcf"
      "\xfc\x1b\x5a\x2b\x16\xa0\x4d\xf2\xe7\x0b\x8b\xa7\x91\x21\x74\x28\x13\x58"
      "\xfb\x0b\x3e\xe8\x34\x62\xaa\x91\x1e\xa0\x7d\xe7\x0d\x93\xcb\xd6\x6d\xa9"
      "\x06\x2a\x2a\x58\xea\x90\xc6\x40\xac\x14\x99\x5f\x48\x98\x24\x1b\x85\x9b"
      "\x80\x6a\x0d\xd9\x9d\xa8\x3d\x6a\xfc\x40\x16\xcb\xd2\x0a\x23\x1e\x2b\x56"
      "\x2c\xbb\xdf\xfe\xec\x27\x76\xc4\xcd\x68\xa2\x67\x06\x0a\x9f\xa2\xd7\xa4"
      "\xdd\x02\x73\x84\x34\xe4\x31\x72\x8b\xa4\x60\xed\x7a\xb5\x7d\xea\x45\x60"
      "\x81\xf0\x03\x00\x00\x00\x81\x03\x26\x33\x61\x6b\x02\x2c\x5d\x19\x91\x5e"
      "\x18\xb5\x4d\xa3\xf0\xb2\xc7\x8a\xc2\xb9\xee\x67\xcb\x9e\x3b\xf1\xa3\xd4"
      "\xa7\x34\x8b\xec\x48\x30\xaa\x02\x6a\xf8\x1e\x33\x7d\x1c\xc2\xe0\xf5\x23"
      "\x0c\x11\xe6\xfb\x2d\x95\xee\x56\x16\x7c\x15\x3f\x75\x11\x96\x41\x35\xee"
      "\xf9\x60\x37\xc1\x4c\x15\x13\x2b\xdd\x86\x7d\xb8\xdb\xa7\x6e\x62\xe5\x15"
      "\x0d\xb6\xb1\x95\x52\xfb\x01\xbc\x80\x92\xfd\x86\xb6\x87\xc3\x11\xc3\xc5"
      "\x37\x21\x6d\x3a\xff\xd7\x42\x17\x10\x8f\x5d\x29\xc3\xa4\xc4\xf7\xe2\x60"
      "\x2d\xf7\x31\x30\x19\x74\x7e\xd6\xa9\xa0\xf1\x9e\x90\x95\x0e\xe7\xb3\xf8"
      "\x43\x83\xdf\xc2\x3e\xee\xb0\xad\xa3\xcc\xa4\x7b\xd7\x67\xef\xdf\xa3\x3e"
      "\xc2\x20\x9c\x96\x5a\x93\x81\xc9\x83\xd0\x8d\x54\xe8\x2b\xfb\x4f\x89\x5e"
      "\xa5\xb8\x12\x00",
      382);
  *(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;
}