// https://syzkaller.appspot.com/bug?id=e8616085ae2398519d922bdd9c2d97cd18a66d29
// 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_getsockname
#define __NR_getsockname 204
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_sendmsg
#define __NR_sendmsg 211
#endif
#ifndef __NR_socket
#define __NR_socket 198
#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;
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

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,
                 0x0};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0);
  if (res != -1)
    r[1] = res;
  res = syscall(__NR_socket, 0x10ul, 0x803ul, 0);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x20000580 = 0;
  *(uint32_t*)0x20000588 = 0;
  *(uint64_t*)0x20000590 = 0x20000540;
  *(uint64_t*)0x20000540 = 0;
  *(uint64_t*)0x20000548 = 0x1c;
  *(uint64_t*)0x20000598 = 1;
  *(uint64_t*)0x200005a0 = 0;
  *(uint64_t*)0x200005a8 = 0;
  *(uint32_t*)0x200005b0 = 0;
  syscall(__NR_sendmsg, r[2], 0x20000580ul, 0ul);
  *(uint32_t*)0x20000080 = 0x14;
  res = syscall(__NR_getsockname, r[2], 0x20000600ul, 0x20000080ul);
  if (res != -1)
    r[3] = *(uint32_t*)0x20000604;
  *(uint64_t*)0x20000040 = 0;
  *(uint32_t*)0x20000048 = 0;
  *(uint64_t*)0x20000050 = 0x20000000;
  *(uint64_t*)0x20000000 = 0x200000c0;
  memcpy((void*)0x200000c0,
         "\x3c\x00\x00\x00\x10\x00\x85\x06\x00\x00\x20\x00\xfe\x61\x22\x31\x4a"
         "\x00\x08\x00",
         20);
  *(uint32_t*)0x200000d4 = r[3];
  memcpy((void*)0x200000d8,
         "\x23\x77\xf2\x92\x25\x21\x55\xb2\x1c\x00\x12\x00\x0c\x00\x01\x00\x62"
         "\x6f\x6e\x64\x00\x00\x00\x00\x0c\x00\x02\x00\x08\x00\x01\x00\x01",
         33);
  *(uint64_t*)0x20000008 = 0x3c;
  *(uint64_t*)0x20000058 = 1;
  *(uint64_t*)0x20000060 = 0;
  *(uint64_t*)0x20000068 = 0;
  *(uint32_t*)0x20000070 = 0;
  syscall(__NR_sendmsg, r[1], 0x20000040ul, 0ul);
  *(uint64_t*)0x20000240 = 0;
  *(uint32_t*)0x20000248 = 0;
  *(uint64_t*)0x20000250 = 0x20000680;
  *(uint64_t*)0x20000680 = 0x20000740;
  *(uint32_t*)0x20000740 = 0x44;
  *(uint16_t*)0x20000744 = 0x10;
  *(uint16_t*)0x20000746 = 0xff1f;
  *(uint32_t*)0x20000748 = 0;
  *(uint32_t*)0x2000074c = 0;
  *(uint8_t*)0x20000750 = 0;
  *(uint8_t*)0x20000751 = 0;
  *(uint16_t*)0x20000752 = 0;
  *(uint32_t*)0x20000754 = 0;
  *(uint32_t*)0x20000758 = 0x940;
  *(uint32_t*)0x2000075c = 0;
  *(uint16_t*)0x20000760 = 0x1c;
  STORE_BY_BITMASK(uint16_t, , 0x20000762, 0x12, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000763, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000763, 1, 7, 1);
  *(uint16_t*)0x20000764 = 0xb;
  *(uint16_t*)0x20000766 = 1;
  memcpy((void*)0x20000768, "ip6gre\000", 7);
  *(uint16_t*)0x20000770 = 0xc;
  STORE_BY_BITMASK(uint16_t, , 0x20000772, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000773, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000773, 1, 7, 1);
  *(uint16_t*)0x20000774 = 8;
  *(uint16_t*)0x20000776 = 1;
  *(uint32_t*)0x20000778 = r[3];
  *(uint16_t*)0x2000077c = 8;
  *(uint16_t*)0x2000077e = 0xa;
  *(uint32_t*)0x20000780 = r[3];
  *(uint64_t*)0x20000688 = 0x44;
  *(uint64_t*)0x20000258 = 1;
  *(uint64_t*)0x20000260 = 0;
  *(uint64_t*)0x20000268 = 0;
  *(uint32_t*)0x20000270 = 0;
  syscall(__NR_sendmsg, r[0], 0x20000240ul, 0xb700ul);
}
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;
}