// https://syzkaller.appspot.com/bug?id=8aa97c8f331730c91d216892a45e279362cddc8b
// 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_ioctl
#define __NR_ioctl 29
#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 (;;) {
      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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=*/2ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000c80,
         "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=*/0x20000c80ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x20000c90;
  *(uint64_t*)0x200002c0 = 0;
  *(uint32_t*)0x200002c8 = 0;
  *(uint64_t*)0x200002d0 = 0x20000000;
  *(uint64_t*)0x20000000 = 0x20000300;
  *(uint32_t*)0x20000300 = 0x88;
  *(uint16_t*)0x20000304 = 0x24;
  *(uint16_t*)0x20000306 = 0x6541;
  *(uint32_t*)0x20000308 = 0;
  *(uint32_t*)0x2000030c = 0;
  *(uint8_t*)0x20000310 = 0;
  *(uint8_t*)0x20000311 = 0;
  *(uint16_t*)0x20000312 = 0;
  *(uint32_t*)0x20000314 = r[2];
  *(uint16_t*)0x20000318 = 0;
  *(uint16_t*)0x2000031a = 0;
  *(uint16_t*)0x2000031c = -1;
  *(uint16_t*)0x2000031e = -1;
  *(uint16_t*)0x20000320 = 0;
  *(uint16_t*)0x20000322 = 0;
  *(uint16_t*)0x20000324 = 7;
  *(uint16_t*)0x20000326 = 1;
  memcpy((void*)0x20000328, "fq\000", 3);
  *(uint16_t*)0x2000032c = 0x34;
  *(uint16_t*)0x2000032e = 2;
  *(uint16_t*)0x20000330 = 8;
  *(uint16_t*)0x20000332 = 4;
  *(uint32_t*)0x20000334 = 0;
  *(uint16_t*)0x20000338 = 8;
  *(uint16_t*)0x2000033a = 6;
  *(uint32_t*)0x2000033c = 0x71;
  *(uint16_t*)0x20000340 = 8;
  *(uint16_t*)0x20000342 = 1;
  *(uint32_t*)0x20000344 = 0xfff;
  *(uint16_t*)0x20000348 = 8;
  *(uint16_t*)0x2000034a = 0xb;
  *(uint32_t*)0x2000034c = 0;
  *(uint16_t*)0x20000350 = 8;
  *(uint16_t*)0x20000352 = 6;
  *(uint32_t*)0x20000354 = 0;
  *(uint16_t*)0x20000358 = 8;
  *(uint16_t*)0x2000035a = 3;
  *(uint32_t*)0x2000035c = 2;
  *(uint16_t*)0x20000360 = 0x28;
  STORE_BY_BITMASK(uint16_t, , 0x20000362, 8, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000363, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000363, 1, 7, 1);
  *(uint16_t*)0x20000364 = 0x1c;
  *(uint16_t*)0x20000366 = 1;
  *(uint8_t*)0x20000368 = 0;
  *(uint8_t*)0x20000369 = 9;
  *(uint16_t*)0x2000036a = 0xa;
  *(uint32_t*)0x2000036c = 0x20009;
  *(uint32_t*)0x20000370 = 0;
  *(uint32_t*)0x20000374 = 6;
  *(uint32_t*)0x20000378 = 0;
  *(uint32_t*)0x2000037c = 1;
  *(uint16_t*)0x20000380 = 6;
  *(uint16_t*)0x20000382 = 2;
  *(uint16_t*)0x20000384 = 0x1400;
  *(uint64_t*)0x20000008 = 0x88;
  *(uint64_t*)0x200002d8 = 1;
  *(uint64_t*)0x200002e0 = 0;
  *(uint64_t*)0x200002e8 = 0;
  *(uint32_t*)0x200002f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200002c0ul, /*f=*/0ul);
  syscall(__NR_socket, /*domain=AF_NETLINK*/ 0x10ul,
          /*type=SOCK_NONBLOCK|SOCK_RAW*/ 0x803ul, /*proto=*/0);
}
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;
}