// https://syzkaller.appspot.com/bug?id=5ddac33368ddb55edb1e152940542d2bd497ba88
// 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/mount.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_close_range
#define __NR_close_range 436
#endif
#ifndef __NR_io_uring_setup
#define __NR_io_uring_setup 425
#endif

static unsigned long long procid;

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;
    }
  }
}

void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (4 bytes)
  //  ]
  //  returns sock_nl_generic
  syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
  //  socket arguments: [
  //    domain: socket_domain = 0x2 (8 bytes)
  //    type: socket_type = 0x80002 (8 bytes)
  //    proto: int32 = 0x73 (4 bytes)
  //  ]
  //  returns sock
  syscall(__NR_socket, /*domain=AF_INET*/ 2ul,
          /*type=SOCK_CLOEXEC|SOCK_DGRAM*/ 0x80002ul, /*proto=*/0x73);
  //  socket arguments: [
  //    domain: socket_domain = 0x15 (8 bytes)
  //    type: socket_type = 0x5 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  syscall(__NR_socket, /*domain=AF_RDS*/ 0x15ul, /*type=SOCK_SEQPACKET*/ 5ul,
          /*proto=*/0);
  //  openat$auto_tty_fops_tty_io arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: nil
  //    flags: open_flags = 0x0 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_tty_fops_tty_io
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0ul, /*flags=*/0,
          /*mode=*/0);
  //  mmap$auto arguments: [
  //    addr: intptr = 0x0 (8 bytes)
  //    len: intptr = 0x8000 (8 bytes)
  //    prot: intptr = 0xdf (8 bytes)
  //    flags: intptr = 0xeb1 (8 bytes)
  //    fd: fd (resource)
  //    off: intptr = 0x8000 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0ul, /*len=*/0x8000ul, /*prot=*/0xdful,
          /*flags=*/0xeb1ul, /*fd=*/0x401, /*off=*/0x8000ul);
  //  socket arguments: [
  //    domain: socket_domain = 0x15 (8 bytes)
  //    type: socket_type = 0x5 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  syscall(__NR_socket, /*domain=AF_RDS*/ 0x15ul, /*type=SOCK_SEQPACKET*/ 5ul,
          /*proto=*/0);
  //  openat$auto_proc_reg_file_ops_compat_inode arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 70 72 6f 63 2f 61 73 6f 75 6e 64 2f 6d 6f 64 75 6c 65 73
  //      00} (length 0x15)
  //    }
  //    flags: open_flags = 0x88400 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_proc_reg_file_ops_compat_inode
  memcpy((void*)0x200000000280, "/proc/asound/modules\000", 21);
  syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000280ul,
          /*flags=O_LARGEFILE|O_CLOEXEC|O_APPEND*/ 0x88400, /*mode=*/0);
  //  io_uring_setup$auto arguments: [
  //    entries: int32 = 0xc (4 bytes)
  //    params: nil
  //  ]
  //  returns fd
  syscall(__NR_io_uring_setup, /*entries=*/0xc, /*params=*/0ul);
  //  socket arguments: [
  //    domain: socket_domain = 0x2 (8 bytes)
  //    type: socket_type = 0x5 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  syscall(__NR_socket, /*domain=AF_INET*/ 2ul, /*type=SOCK_SEQPACKET*/ 5ul,
          /*proto=*/0);
  //  socket arguments: [
  //    domain: socket_domain = 0x1d (8 bytes)
  //    type: socket_type = 0x2 (8 bytes)
  //    proto: int32 = 0x6 (4 bytes)
  //  ]
  //  returns sock
  syscall(__NR_socket, /*domain=AF_CAN*/ 0x1dul, /*type=SOCK_DGRAM*/ 2ul,
          /*proto=*/6);
  //  close_range$auto arguments: [
  //    fd: fd (resource)
  //    max_fd: fd (resource)
  //    flags: int32 = 0x0 (4 bytes)
  //  ]
  syscall(__NR_close_range, /*fd=*/2, /*max_fd=*/(intptr_t)-1, /*flags=*/0);
  //  openat$auto_dvb_frontend_fops_dvb_frontend arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 64 76 62 2f 61 64 61 70 74 65 72 30 2f 66 72
  //      6f 6e 74 65 6e 64 30 00} (length 0x1c)
  //    }
  //    flags: open_flags = 0xc8e03 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_dvb_frontend_fops_dvb_frontend
  memcpy((void*)0x200000000000, "/dev/dvb/adapter0/frontend0\000", 28);
  syscall(
      __NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000000ul,
      /*flags=O_TRUNC|O_NONBLOCK|O_NOATIME|O_LARGEFILE|O_CLOEXEC|O_APPEND|0x3*/
      0xc8e03, /*mode=*/0);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*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=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}