// https://syzkaller.appspot.com/bug?id=b37fc58e1fe10fd8fe2bdb06b59eff86d0f18ba4
// 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;
}

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;
}

const int kInitNetNsFd = 201;

static long syz_init_net_socket(volatile long domain, volatile long type,
                                volatile long proto)
{
  return syscall(__NR_socket, domain, type, proto);
}

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[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_init_net_socket$802154_dgram arguments: [
  //    domain: const = 0x24 (8 bytes)
  //    type: const = 0x2 (8 bytes)
  //    proto: const = 0x0 (8 bytes)
  //  ]
  //  returns sock_802154_dgram
  res = -1;
  res = syz_init_net_socket(/*domain=*/0x24, /*type=*/2, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  setsockopt$WPAN_SECURITY arguments: [
  //    fd: sock_802154_dgram (resource)
  //    level: const = 0x0 (4 bytes)
  //    opt: const = 0x1 (4 bytes)
  //    val: ptr[in, ieee802154_security] {
  //      ieee802154_security = 0x2 (4 bytes)
  //    }
  //    len: bytesize = 0x4 (8 bytes)
  //  ]
  *(uint32_t*)0x200000000040 = 2;
  syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/0, /*opt=*/1,
          /*val=*/0x200000000040ul, /*len=*/4ul);
  //  setsockopt$WPAN_SECURITY arguments: [
  //    fd: sock_802154_dgram (resource)
  //    level: const = 0x0 (4 bytes)
  //    opt: const = 0x1 (4 bytes)
  //    val: ptr[in, ieee802154_security] {
  //      ieee802154_security = 0x0 (4 bytes)
  //    }
  //    len: bytesize = 0x4 (8 bytes)
  //  ]
  *(uint32_t*)0x200000000080 = 0;
  syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/0, /*opt=*/1,
          /*val=*/0x200000000080ul, /*len=*/4ul);
  //  sendmsg$802154_dgram arguments: [
  //    fd: sock_802154_dgram (resource)
  //    msg: ptr[in, msghdr_802154] {
  //      msghdr_802154 {
  //        addr: ptr[in, sockaddr_ieee802154] {
  //          sockaddr_ieee802154 {
  //            family: const = 0x24 (2 bytes)
  //            pad = 0x0 (2 bytes)
  //            addr: union ieee802154_addr_sa {
  //              short: ieee802154_addr_sa_t[IEEE802154_ADDR_SHORT,
  //              flags[ieee802154_short_addr, int16]] {
  //                addr_type: const = 0x2 (4 bytes)
  //                pan_id: ieee802154_pan_id = 0x3 (2 bytes)
  //                addr: ieee802154_short_addr = 0xfffe (2 bytes)
  //              }
  //            }
  //          }
  //        }
  //        addrlen: len = 0x14 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, array[int8]]] {
  //          iovec[in, array[int8]] {
  //            addr: nil
  //            len: len = 0x0 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x4040044 (8 bytes)
  //  ]
  *(uint64_t*)0x200000002480 = 0x200000002380;
  *(uint16_t*)0x200000002380 = 0x24;
  *(uint32_t*)0x200000002384 = 2;
  *(uint16_t*)0x200000002388 = 3;
  *(uint16_t*)0x20000000238a = 0xfffe;
  *(uint32_t*)0x200000002488 = 0x14;
  *(uint64_t*)0x200000002490 = 0x200000002440;
  *(uint64_t*)0x200000002440 = 0;
  *(uint64_t*)0x200000002448 = 0;
  *(uint64_t*)0x200000002498 = 1;
  *(uint64_t*)0x2000000024a0 = 0;
  *(uint64_t*)0x2000000024a8 = 0;
  *(uint32_t*)0x2000000024b0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000002480ul,
          /*f=MSG_ZEROCOPY|MSG_BATCH|MSG_DONTWAIT|MSG_DONTROUTE*/ 0x4040044ul);
}
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;
  loop();
  return 0;
}