// https://syzkaller.appspot.com/bug?id=0b210638616bb68109e9642158d4c0072770ae1c
// 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;
}

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)) {
  }
  //  sendmsg$auto_GTP_CMD_NEWPDP arguments: [
  //    fd: sock_nl_generic (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[genl_gtp_family_id$auto,
  //    genlmsghdr_t[GTP_CMD_NEWPDP], gtp_genl_policy_gtp$auto]]] {
  //      msghdr_netlink[netlink_msg_t[genl_gtp_family_id$auto,
  //      genlmsghdr_t[GTP_CMD_NEWPDP], gtp_genl_policy_gtp$auto]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_t[genl_gtp_family_id$auto,
  //        genlmsghdr_t[GTP_CMD_NEWPDP], gtp_genl_policy_gtp$auto]]] {
  //          iovec[in, netlink_msg_t[genl_gtp_family_id$auto,
  //          genlmsghdr_t[GTP_CMD_NEWPDP], gtp_genl_policy_gtp$auto]] {
  //            addr: nil
  //            len: len = 0x0 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x20004050 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x4000084 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000040 = 0;
  *(uint32_t*)0x200000000048 = 0;
  *(uint64_t*)0x200000000050 = 0x200000000180;
  *(uint64_t*)0x200000000180 = 0;
  *(uint64_t*)0x200000000188 = 0;
  *(uint64_t*)0x200000000058 = 1;
  *(uint64_t*)0x200000000060 = 0;
  *(uint64_t*)0x200000000068 = 0;
  *(uint32_t*)0x200000000070 = 0x20004050;
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x200000000040ul,
          /*f=MSG_ZEROCOPY|MSG_EOR|MSG_DONTROUTE*/ 0x4000084ul);
  //  lstat$auto arguments: [
  //    filename: nil
  //    statbuf: ptr[inout, stat$auto] {
  //      stat$auto {
  //        st_dev: intptr = 0x4 (8 bytes)
  //        st_ino: intptr = 0x1c (8 bytes)
  //        st_nlink: intptr = 0x9 (8 bytes)
  //        st_mode: int32 = 0x63 (4 bytes)
  //        st_uid: uid (resource)
  //        st_gid: gid (resource)
  //        __pad0: const = 0x0 (4 bytes)
  //        st_rdev: intptr = 0xffc (8 bytes)
  //        st_size: intptr = 0x8 (8 bytes)
  //        st_blksize: intptr = 0x80000000000000a (8 bytes)
  //        st_blocks: intptr = 0x0 (8 bytes)
  //        st_atime: intptr = 0x9 (8 bytes)
  //        st_atime_nsec: intptr = 0x9 (8 bytes)
  //        st_mtime: intptr = 0xffffffff80000000 (8 bytes)
  //        st_mtime_nsec: intptr = 0xd (8 bytes)
  //        st_ctime: intptr = 0x6 (8 bytes)
  //        st_ctime_nsec: intptr = 0x200000100103 (8 bytes)
  //        __unused: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00} (length 0x18)
  //      }
  //    }
  //  ]
  *(uint64_t*)0x200000000180 = 4;
  *(uint64_t*)0x200000000188 = 0x1c;
  *(uint64_t*)0x200000000190 = 9;
  *(uint32_t*)0x200000000198 = 0x63;
  *(uint32_t*)0x20000000019c = 0;
  *(uint32_t*)0x2000000001a0 = 0;
  *(uint32_t*)0x2000000001a4 = 0;
  *(uint64_t*)0x2000000001a8 = 0xffc;
  *(uint64_t*)0x2000000001b0 = 8;
  *(uint64_t*)0x2000000001b8 = 0x80000000000000a;
  *(uint64_t*)0x2000000001c0 = 0;
  *(uint64_t*)0x2000000001c8 = 9;
  *(uint64_t*)0x2000000001d0 = 9;
  *(uint64_t*)0x2000000001d8 = 0xffffffff80000000;
  *(uint64_t*)0x2000000001e0 = 0xd;
  *(uint64_t*)0x2000000001e8 = 6;
  *(uint64_t*)0x2000000001f0 = 0x200000100103;
  memset((void*)0x2000000001f8, 0, 24);
  syscall(__NR_lstat, /*filename=*/0ul, /*statbuf=*/0x200000000180ul);
  //  socket$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (4 bytes)
  //  ]
  //  returns sock_nl_generic
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
  if (res != -1)
    r[0] = res;
  //  ioctl$sock_SIOCGIFINDEX arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x89fc (4 bytes)
  //    arg: ptr[out, ifreq_dev_t[devnames, ifindex]] {
  //      ifreq_dev_t[devnames, ifindex] {
  //        ifr_ifrn: buffer: {62 72 69 64 67 65 30 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) elem: ifindex (resource) pad = 0x0 (20 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x200000000040, "bridge0\000\000\000\000\000\000\000\000\000",
         16);
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x89fc, /*arg=*/0x200000000040ul);
}
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;
}