// https://syzkaller.appspot.com/bug?id=199d38362a1bbb5f8dc8775b7e49e1a9e3710185
// 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_io_setup
#define __NR_io_setup 0
#endif
#ifndef __NR_io_submit
#define __NR_io_submit 2
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_setsockopt
#define __NR_setsockopt 208
#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;
}

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 < 15000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[2] = {0x0, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  io_setup arguments: [
  //    n: int32 = 0x3 (4 bytes)
  //    ctx: ptr[out, io_ctx] {
  //      io_ctx (resource)
  //    }
  //  ]
  res = syscall(__NR_io_setup, /*n=*/3, /*ctx=*/0x20000000ul);
  if (res != -1)
    r[0] = *(uint64_t*)0x20000000;
  //  socket arguments: [
  //    domain: socket_domain = 0xa (8 bytes)
  //    type: socket_type = 0x1 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  res = syscall(__NR_socket, /*domain=AF_INET6*/ 0xaul,
                /*type=SOCK_STREAM*/ 1ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  setsockopt$sock_linger arguments: [
  //    fd: sock (resource)
  //    level: const = 0x1 (4 bytes)
  //    optname: const = 0xd (4 bytes)
  //    optval: ptr[in, linger] {
  //      linger {
  //        onoff: int32 = 0x1 (4 bytes)
  //        linger: int32 = 0x3 (4 bytes)
  //      }
  //    }
  //    optlen: len = 0x8 (8 bytes)
  //  ]
  *(uint32_t*)0x20000300 = 1;
  *(uint32_t*)0x20000304 = 3;
  syscall(__NR_setsockopt, /*fd=*/r[1], /*level=*/1, /*optname=*/0xd,
          /*optval=*/0x20000300ul, /*optlen=*/8ul);
  //  io_submit arguments: [
  //    ctx: io_ctx (resource)
  //    nr: len = 0x3 (8 bytes)
  //    iocbpp: ptr[in, array[ptr[in, iocb]]] {
  //      array[ptr[in, iocb]] {
  //        ptr[in, iocb] {
  //          iocb {
  //            aio_data: const = 0x0 (8 bytes)
  //            aio_key: const = 0x0 (4 bytes)
  //            aio_rw_flags: const = 0x0 (4 bytes)
  //            aio_lio_opcode: lio_opcode = 0x0 (2 bytes)
  //            aio_reqprio: int16 = 0x8 (2 bytes)
  //            aio_fildes: fd (resource)
  //            aio_buf: nil
  //            aio_nbytes: len = 0x0 (8 bytes)
  //            aio_offset: int64 = 0x0 (8 bytes)
  //            aio_reserved2: const = 0x0 (8 bytes)
  //            aio_flags: iocb_flags = 0x0 (4 bytes)
  //            aio_resfd: fd_event (resource)
  //          }
  //        }
  //        nil
  //        nil
  //      }
  //    }
  //  ]
  *(uint64_t*)0x200002c0 = 0x20000040;
  *(uint64_t*)0x20000040 = 0;
  *(uint32_t*)0x20000048 = 0;
  *(uint32_t*)0x2000004c = 0;
  *(uint16_t*)0x20000050 = 0;
  *(uint16_t*)0x20000052 = 8;
  *(uint32_t*)0x20000054 = r[1];
  *(uint64_t*)0x20000058 = 0;
  *(uint64_t*)0x20000060 = 0;
  *(uint64_t*)0x20000068 = 0;
  *(uint64_t*)0x20000070 = 0;
  *(uint32_t*)0x20000078 = 0;
  *(uint32_t*)0x2000007c = -1;
  *(uint64_t*)0x200002c8 = 0;
  *(uint64_t*)0x200002d0 = 0;
  syscall(__NR_io_submit, /*ctx=*/r[0], /*nr=*/3ul, /*iocbpp=*/0x200002c0ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-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=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}