// https://syzkaller.appspot.com/bug?id=6fc82d37863439177eb3d2f7b6c7a0e72913c8dd
// 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 (;;) {
      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;
    }
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0xaul, 1ul, 0);
  if (res != -1)
    r[0] = res;
  *(uint16_t*)0x200003c0 = 0xa;
  *(uint16_t*)0x200003c2 = htobe16(0x4e22);
  *(uint32_t*)0x200003c4 = htobe32(0);
  memset((void*)0x200003c8, 0, 16);
  *(uint32_t*)0x200003d8 = 0;
  syscall(__NR_bind, r[0], 0x200003c0ul, 0x1cul);
  syscall(__NR_listen, r[0], 0);
  res = syscall(__NR_socket, 0xaul, 1ul, 0);
  if (res != -1)
    r[1] = res;
  *(uint16_t*)0x20000080 = 0xa;
  *(uint16_t*)0x20000082 = htobe16(0x4e22);
  *(uint32_t*)0x20000084 = htobe32(0);
  memset((void*)0x20000088, 0, 16);
  *(uint32_t*)0x20000098 = 0;
  syscall(__NR_sendto, r[1], 0ul, 0ul, 0x20000004ul, 0x20000080ul, 0x1cul);
  *(uint32_t*)0x2000e000 = 0xe;
  *(uint32_t*)0x2000e004 = 4;
  *(uint64_t*)0x2000e008 = 0x20000480;
  memcpy(
      (void*)0x20000480,
      "\xb4\x05\x00\x00\x20\x00\x80\x00\x61\x10\x60\x00\x00\x00\x00\x00\xc6\x00"
      "\x00\x00\x00\x00\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00\x9f\x33\xef\x60"
      "\x91\x6e\x6e\x89\x3f\x1e\xeb\x0b\xe2\x00\x00\xd0\x72\xf5\xb8\x9c\x30\x43"
      "\xc4\x7c\x89\x6c\xe0\xbc\xe6\x6a\x24\x5a\xd9\x8a\x6f\x77\xef\x26\xdc\xca"
      "\x55\x82\x05\x4d\x54\xd5\x3c\xd2\xb6\xdb\x71\x4e\x4b\x94\xbd\xae\x21\x4f"
      "\xa6\x8a\x05\x57\xeb\x3c\x5c\xa6\x83\xa4\xb6\xfc\x89\x39\x8f\x2b\x90\x00"
      "\xf2\x24\x89\x10\x60\x01\x7c\x47\x00\xde\x60\xbe\xac\x67\x1e\x8e\x8f\xde"
      "\xcb\x03\x58\x8a\xa6\x00\xfa\x71\xf8\x71\xab\x5c\x2f\xf8\x8a\xfc\x60\x02"
      "\x08\x4e\x5b\x52\x71\x0a\xee\xe8\x35\xcf\x0d\x78\xe4\x5f\x70\x98\x38\x26"
      "\xfb\x85\x79\xc1\xfb\x47\xd2\xc5\x55\x3d\x2c\xcb\x5f\xc5\xb5\x1f\xe6\xb1"
      "\x74\xeb\xd9\x90\x7d\xcf\xf4\x14\xed\x55\xb0\xd1\x8a\x93\xee\x34\x1a\xb5"
      "\x90\x16\xf8\x18\x60\x32\x4b\x80\x03\x00\x00\x00\x00\x00\x00\x92\xd9\xc5"
      "\xfe\x34\xcc\xb8\x0a\x61\xff",
      223);
  *(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 = 0x1dd;
  *(uint32_t*)0x2000e06c = 0;
  *(uint32_t*)0x2000e070 = -1;
  *(uint32_t*)0x2000e074 = 0;
  *(uint64_t*)0x2000e078 = 0;
  res = syscall(__NR_bpf, 5ul, 0x2000e000ul, 0x48ul);
  if (res != -1)
    r[2] = res;
  *(uint32_t*)0x20000200 = 0x12;
  *(uint32_t*)0x20000204 = 4;
  *(uint32_t*)0x20000208 = 4;
  *(uint32_t*)0x2000020c = 0x12;
  *(uint32_t*)0x20000210 = 0;
  *(uint32_t*)0x20000214 = -1;
  *(uint32_t*)0x20000218 = 0;
  memset((void*)0x2000021c, 0, 16);
  *(uint32_t*)0x2000022c = 0;
  *(uint32_t*)0x20000230 = -1;
  *(uint32_t*)0x20000234 = 0;
  *(uint32_t*)0x20000238 = 0;
  *(uint32_t*)0x2000023c = 0;
  *(uint64_t*)0x20000240 = 0;
  res = syscall(__NR_bpf, 0ul, 0x20000200ul, 0x48ul);
  if (res != -1)
    r[3] = res;
  *(uint32_t*)0x20000080 = r[3];
  *(uint32_t*)0x20000084 = r[2];
  *(uint32_t*)0x20000088 = 5;
  *(uint32_t*)0x2000008c = 0;
  syscall(__NR_bpf, 8ul, 0x20000080ul, 0x10ul);
  *(uint32_t*)0x20000240 = r[3];
  *(uint64_t*)0x20000248 = 0x200001c0;
  *(uint64_t*)0x20000250 = 0x20000200;
  *(uint32_t*)0x20000200 = r[0];
  *(uint64_t*)0x20000258 = 1;
  syscall(__NR_bpf, 2ul, 0x20000240ul, 0x20ul);
  syscall(__NR_accept4, r[0], 0ul, 0ul, 0ul);
}
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);
  loop();
  return 0;
}