// https://syzkaller.appspot.com/bug?id=c0cae9d6330d2b9b9302c695824e47ac9e0d3ef8
// 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 (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      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;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  res = syscall(__NR_socket, /*domain=*/2ul, /*type=*/1ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000040,
         "lo\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16);
  *(uint16_t*)0x20000050 = 0;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8914, /*arg=*/0x20000040ul);
  res = syscall(__NR_socket, /*domain=AF_NETLINK*/ 0x10ul,
                /*type=SOCK_NONBLOCK|SOCK_RAW*/ 0x803ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  res = syscall(__NR_socketpair, /*domain=*/1ul, /*type=SOCK_STREAM*/ 1ul,
                /*proto=*/0, /*fds=*/0x20000080ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x20000084;
  memcpy((void*)0x20000500,
         "lo\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16);
  res = syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x8933, /*arg=*/0x20000500ul);
  if (res != -1)
    r[3] = *(uint32_t*)0x20000510;
  *(uint64_t*)0x20000140 = 0;
  *(uint32_t*)0x20000148 = 0;
  *(uint64_t*)0x20000150 = 0x200000c0;
  *(uint64_t*)0x200000c0 = 0x20000a40;
  memcpy((void*)0x20000a40,
         "\x34\x00\x00\x00\x14\x00\xb5\x95\x2c\xbc\x70\x00\xff\xdb\xdf\x25\x0a"
         "\x00\x80\xc8",
         20);
  *(uint32_t*)0x20000a54 = r[3];
  memcpy((void*)0x20000a58,
         "\x14\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x01\x08\x00\x09\x00\xff\xff\xff\xff\x56\xd8\x3a\xb5\xdb\x34"
         "\xba\x33\x0d\xc0\xe3\x55\x92\x0b\x1e\x6d\xd7\x40\xe2\x81\xd7\x1b\xb5"
         "\xcf\xa5\x38\x8e\xa6\xd0\x11\xa3\xe0\x97\x70\xf3\x0d\x18\xce\xea\x32"
         "\xf0\x6f\x8c\xfa\x43\x8e\x60\xe8\x27\x13\xa0\xde\xc0\x4e\xea\x65\xd6"
         "\x90\x86\x6c\xf4\x44\xd3\xfe\x61\x10\xc2\xcc\xc9\x81\x62\x86\xbf\x20"
         "\x9e\xd0\x51\xd3\xe4\x05\xb8\x18\x40\x81\x40\x2a\xc6\x24\x15\xec\xeb"
         "\xcd\x45\xbd\x22\x1b\x38\xa8\xb5\xfc\x79\x62\x01\xad\xda\xd4\xb9\xfc"
         "\x35\xe4\x24\x7d\xee\xfb\xe9\x2e\xfa\xb7\x92\x14\xaa\xb5\x08\xf8\x4c"
         "\x71\xed\x98\x5c\x6f\x92\x97\x2e\xe5\xde\xaf\xee\xda\xe2\xa3\xc8",
         169);
  *(uint64_t*)0x200000c8 = 0x34;
  *(uint64_t*)0x20000158 = 1;
  *(uint64_t*)0x20000160 = 0;
  *(uint64_t*)0x20000168 = 0;
  *(uint32_t*)0x20000170 = 0x20008000;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x20000140ul,
          /*f=MSG_BATCH|MSG_DONTWAIT*/ 0x40040ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}