// https://syzkaller.appspot.com/bug?id=1ad5e6e757812fb2378ef0abeb42214502f5417e
// 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 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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socketpair, /*domain=*/1ul, /*type=*/1ul, /*proto=*/0,
                /*fds=*/0x20000080ul);
  if (res != -1)
    r[1] = *(uint32_t*)0x20000084;
  memcpy((void*)0x20000000,
         "lo\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16);
  res = syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8933, /*arg=*/0x20000000ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x20000010;
  *(uint64_t*)0x20000040 = 0;
  *(uint32_t*)0x20000048 = 0;
  *(uint64_t*)0x20000050 = 0x20000780;
  *(uint64_t*)0x20000780 = 0x20000a00;
  *(uint32_t*)0x20000a00 = 0xac;
  *(uint16_t*)0x20000a04 = 0x24;
  *(uint16_t*)0x20000a06 = 0xf0b;
  *(uint32_t*)0x20000a08 = 0;
  *(uint32_t*)0x20000a0c = 0;
  *(uint8_t*)0x20000a10 = 0x60;
  *(uint8_t*)0x20000a11 = 0;
  *(uint16_t*)0x20000a12 = 0;
  *(uint32_t*)0x20000a14 = r[2];
  *(uint16_t*)0x20000a18 = 0;
  *(uint16_t*)0x20000a1a = 0;
  *(uint16_t*)0x20000a1c = -1;
  *(uint16_t*)0x20000a1e = -1;
  *(uint16_t*)0x20000a20 = 0;
  *(uint16_t*)0x20000a22 = 0;
  *(uint16_t*)0x20000a24 = 0xa;
  *(uint16_t*)0x20000a26 = 1;
  memcpy((void*)0x20000a28, "netem\000", 6);
  *(uint16_t*)0x20000a30 = 0x7c;
  *(uint16_t*)0x20000a32 = 2;
  *(uint32_t*)0x20000a34 = 0;
  *(uint32_t*)0x20000a38 = 0;
  *(uint32_t*)0x20000a3c = 0;
  *(uint32_t*)0x20000a40 = 0;
  *(uint32_t*)0x20000a44 = 0;
  *(uint32_t*)0x20000a48 = 0;
  *(uint16_t*)0x20000a4c = 0x10;
  *(uint16_t*)0x20000a4e = 1;
  *(uint32_t*)0x20000a50 = 0;
  *(uint32_t*)0x20000a54 = 0;
  *(uint32_t*)0x20000a58 = 0;
  *(uint16_t*)0x20000a5c = 0xc;
  *(uint16_t*)0x20000a5e = 0xb;
  *(uint64_t*)0x20000a60 = 0;
  *(uint16_t*)0x20000a68 = 0x43;
  *(uint16_t*)0x20000a6a = 2;
  memcpy((void*)0x20000a6c,
         "\xd8\x05\x90\xe6\xd9\x87\x25\x0e\xe3\x27\xfa\x9c\x79\x4a\xcc\x2d\x4a"
         "\x54\x01\x43\xb3\x84\x50\x50\xb1\x6c\x6d\xe5\x1b\xfc\xa3\x27\xa8\xb9"
         "\x3e\xe2\xaa\x69\x04\xdf\x32\xfe\xe8\xf6\xd1\x57\x25\xac\x4b\x13\x86"
         "\x85\xf8\x93\xd2\xa5\x51\xbe\xaf\x26\x57\x19\x2e",
         63);
  *(uint64_t*)0x20000788 = 0xac;
  *(uint64_t*)0x20000058 = 1;
  *(uint64_t*)0x20000060 = 0;
  *(uint64_t*)0x20000068 = 0;
  *(uint32_t*)0x20000070 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x20000040ul, /*f=*/0ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  loop();
  return 0;
}