// https://syzkaller.appspot.com/bug?id=b7640dae2467568f05425b289a1f004faa2dc292
// 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_execveat
#define __NR_execveat 322
#endif
#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x20000040, "/dev/vhost-net\000", 15);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000040ul,
                /*flags=*/2ul, /*mode=*/0ul);
  if (res != -1)
    r[0] = res;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xaf01, /*v=*/0ul);
  memcpy((void*)0x20000400,
         "\243\237n\264dR\004i5\002\254\316\341\210\235[@8\327\316\037 "
         "9I\177\025\035\223=\265\347\\\'L\346\322\216\274)"
         "JtTDq\201\317\201\272\3451\365 "
         "\310\020>\311\\\205\027L\277\317\221\337M\363\002^T*\000\002\271~"
         "B\237\254l\0353\006o\370\026H\252*"
         "\002\367\373\006\361\203\222\250\302\313\256\260\264\223\270\004\361"
         "\231\302yY+\331y\212\325b\350\"q\0330)"
         "\314m\254z\301\255d\2336a\363\335s\273\210\377\b\205\263s\000\016\274"
         "fvi\205\374.|\324h\354\202o\216\223\021\301\324\256\005\027="
         "\331R\320\324\220\317\233\334\256V\210\224\237\343\357qi\355\250w\276"
         "\320\320-tBl\236+\323\355\316\237\203\206\371\022\026Ts\200\023]"
         "C\373`\302`\367\032\000\000\000\000\000\000\000k\256\313\032."
         "\302\217\321x4]PZ\236\325Y\360L\244\274\204\366\004L\3770\213\\*\371,"
         "\266\r\227\355y\340\212\342\214k\306S\303g\271\032\370\217 "
         "\235\000u7\330\'\361E\244(Q\200Fy\265\344q\311\377 "
         "\330\235\255\021\370m\323\274\236\020D\177!\312\016v\025h$"
         "\001\335\345\316\370*\263\001\205\a\344qv&\234\254\232N~"
         "o\345\211\325\a\237\f\037\302e/"
         "\215\036\n\320_\275!^\2446\270j\300x\n\333\341\243\326\256;\r\222@"
         "\245I\210Z1F\360\032t\t\320\212\004m\006\363BL\377S\236Y\364\260U "
         "\370\3200\210y\353X\222\325\273\241h7\363\340\017\275\002\344%"
         "\371\261\207\212M\376G\262L\275\222-\315\037\364\341,\267G|"
         "\354\"\242\253\366\204\340\3171\232",
         440);
  res = syscall(__NR_memfd_create, /*name=*/0x20000400ul, /*flags=*/0ul);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000140,
         "\x7f\x45\x4c\x46\x60\x00\x00\x2e\xd8\xe4\xf9\x77\x65\xce\x27\xb9\x03"
         "\x00\x06\x00\x00\x00\x00\x00\x00\x00\x00\xb7\x38\x00\x00\x00\x00\x00"
         "\x35\xf4\xc3\x84\x22\xa3\xbc\x82\x20\x00\x05\x00\x00\x00\x04\x02\x03"
         "\x00\xb3\x00\x00\x00\x00\x00\x2a\x00\x24\x00\xb3\xd7\xc5\x2e\xbf\x31"
         "\xa8\xd5\xc8\xc3\xc6\xcb\x00\x00\x00\x09\xe5\x00\xd5\xff\xff\xff\x05"
         "\xff\xff\xff\x03\x00\x4f\x9e\xf4",
         93);
  syscall(__NR_write, /*fd=*/r[1], /*data=*/0x20000140ul, /*len=*/0xd8ul);
  memset((void*)0x20000000, 0, 1);
  syscall(__NR_execveat, /*dirfd=*/r[1], /*file=*/0x20000000ul, /*argv=*/0ul,
          /*envp=*/0ul, /*flags=*/0x1000ul);
}
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;
}