// https://syzkaller.appspot.com/bug?id=afbc066a93c69dab5cd28912bfea4e648bf61df2
// 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;
}

#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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0};

void execute_one(void)
{
  intptr_t res = 0;
  syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0ul, /*flags=*/0x275aul,
          /*mode=*/0ul);
  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 = 0x20001840;
  *(uint32_t*)0x20001840 = 0x15c;
  *(uint16_t*)0x20001844 = 0x24;
  *(uint16_t*)0x20001846 = 0xf0b;
  *(uint32_t*)0x20001848 = 0;
  *(uint32_t*)0x2000184c = 0;
  *(uint8_t*)0x20001850 = 0x60;
  *(uint8_t*)0x20001851 = 0;
  *(uint16_t*)0x20001852 = 0;
  *(uint32_t*)0x20001854 = r[2];
  *(uint16_t*)0x20001858 = 0;
  *(uint16_t*)0x2000185a = 0;
  *(uint16_t*)0x2000185c = -1;
  *(uint16_t*)0x2000185e = -1;
  *(uint16_t*)0x20001860 = 0;
  *(uint16_t*)0x20001862 = 0;
  *(uint16_t*)0x20001864 = 0xa;
  *(uint16_t*)0x20001866 = 1;
  memcpy((void*)0x20001868, "netem\000", 6);
  *(uint16_t*)0x20001870 = 0x12c;
  *(uint16_t*)0x20001872 = 2;
  *(uint32_t*)0x20001874 = 0;
  *(uint32_t*)0x20001878 = 0;
  *(uint32_t*)0x2000187c = 0x80000;
  *(uint32_t*)0x20001880 = 0;
  *(uint32_t*)0x20001884 = 0;
  *(uint32_t*)0x20001888 = 0;
  *(uint16_t*)0x2000188c = 0x9c;
  STORE_BY_BITMASK(uint16_t, , 0x2000188e, 5, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000188f, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000188f, 1, 7, 1);
  *(uint16_t*)0x20001890 = 0x18;
  *(uint16_t*)0x20001892 = 1;
  *(uint32_t*)0x20001894 = 0;
  *(uint32_t*)0x20001898 = 0;
  *(uint32_t*)0x2000189c = 0;
  *(uint32_t*)0x200018a0 = 0;
  *(uint32_t*)0x200018a4 = 4;
  *(uint16_t*)0x200018a8 = 0x14;
  *(uint16_t*)0x200018aa = 2;
  *(uint32_t*)0x200018ac = 0;
  *(uint32_t*)0x200018b0 = 0;
  *(uint32_t*)0x200018b4 = 0;
  *(uint32_t*)0x200018b8 = 0;
  *(uint16_t*)0x200018bc = 0x18;
  *(uint16_t*)0x200018be = 1;
  *(uint32_t*)0x200018c0 = 0;
  *(uint32_t*)0x200018c4 = 0;
  *(uint32_t*)0x200018c8 = 0;
  *(uint32_t*)0x200018cc = 1;
  *(uint32_t*)0x200018d0 = 0;
  *(uint16_t*)0x200018d4 = 0x14;
  *(uint16_t*)0x200018d6 = 2;
  *(uint32_t*)0x200018d8 = 0;
  *(uint32_t*)0x200018dc = 0;
  *(uint32_t*)0x200018e0 = 0;
  *(uint32_t*)0x200018e4 = 0;
  *(uint16_t*)0x200018e8 = 0x14;
  *(uint16_t*)0x200018ea = 2;
  *(uint32_t*)0x200018ec = 0;
  *(uint32_t*)0x200018f0 = 0;
  *(uint32_t*)0x200018f4 = 0;
  *(uint32_t*)0x200018f8 = 0;
  *(uint16_t*)0x200018fc = 0x18;
  *(uint16_t*)0x200018fe = 1;
  *(uint32_t*)0x20001900 = 0;
  *(uint32_t*)0x20001904 = 0;
  *(uint32_t*)0x20001908 = 0;
  *(uint32_t*)0x2000190c = 0;
  *(uint32_t*)0x20001910 = 0;
  *(uint16_t*)0x20001914 = 0x14;
  *(uint16_t*)0x20001916 = 2;
  *(uint32_t*)0x20001918 = 0;
  *(uint32_t*)0x2000191c = 0;
  *(uint32_t*)0x20001920 = 0;
  *(uint32_t*)0x20001924 = 0;
  *(uint16_t*)0x20001928 = 0x10;
  *(uint16_t*)0x2000192a = 1;
  *(uint32_t*)0x2000192c = 0;
  *(uint32_t*)0x20001930 = 0;
  *(uint32_t*)0x20001934 = 0;
  *(uint16_t*)0x20001938 = 0x44;
  *(uint16_t*)0x2000193a = 2;
  memcpy((void*)0x2000193c,
         "\x92\xd8\x84\x39\x37\x47\x92\x9e\xce\x1d\xbe\x0b\x9e\xb8\x35\x76\xe3"
         "\x2b\x31\xa3\xce\xbc\x6a\x5e\x7a\xe9\xfe\x8f\xee\xe4\xf2\x8b\xa4\xe4"
         "\xf6\x3b\x60\x09\xc8\x1c\xe3\xc4\xff\xce\xe1\xdc\x15\x4d\x3b\xae\xe1"
         "\xbb\x07\xa5\x8b\x04\x4c\xf6\xa9\x5f\xea\xe5\x1b\xd0",
         64);
  *(uint16_t*)0x2000197c = 8;
  *(uint16_t*)0x2000197e = 7;
  *(uint32_t*)0x20001980 = 0;
  *(uint16_t*)0x20001984 = 0xc;
  *(uint16_t*)0x20001986 = 4;
  *(uint32_t*)0x20001988 = 0;
  *(uint32_t*)0x2000198c = 0;
  *(uint16_t*)0x20001990 = 0xc;
  *(uint16_t*)0x20001992 = 0xa;
  *(uint64_t*)0x20001994 = 0;
  *(uint64_t*)0x20000788 = 0x15c;
  *(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;
}