// https://syzkaller.appspot.com/bug?id=df466e1151a7e45dd880d8c7033f1ad48acebfb4
// 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 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;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  sendmsg$nl_route arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route]] {
  //      msghdr_netlink[netlink_msg_route] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route]] {
  //          iovec[in, netlink_msg_route] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {3c 00 00 00 10 00 3b 15 28 bd 70 00 00
  //                  00 00 00 00 00 00 00} (length 0x14)
  //                }
  //                union ANYUNION {
  //                  ANYRES32: ANYRES32 (resource)
  //                }
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {f7 00 00 00 00 00 00 00 14 00 12 80 09
  //                  00 01 00 76 65 74 68 00 00 00 00 04 00 02 80 05 00 10 00
  //                  14 00 00 00 b6 66 d5 94 00 8a a3 f5 51 a6 4d 78 17 a9 b7
  //                  f8 56 33 fb ae 35 8a 73 97 29 e1 4e 2e 54 7e f4 c0 15 eb
  //                  65 6a 64 63 e7 ca c4 f9 27 3c 5d b2 a5 13 31 bd d6 27 a7
  //                  d4 8d e0 c0 87 56 5e 09 28 49 81 43 7c 1c ff 60 52 27 7f
  //                  59 46 bf af e1 18 b9 1d 60 f4 aa a0 61 1b aa 9b 4e e6 d1
  //                  0d 64 b1 16 97 7b 90 ee bb 9d ca c8 e5 ab 5d 46 2d 6a fa
  //                  11 e3 42 a8 b6 8e 24 ac 93 b0 9f 80 10 4e 27 b6 2a f6 a7
  //                  5d 72 9f cd e2 cc cc f2 d4 2e 0c 46 ef 4c 9f db 8a e5 4a
  //                  9b a0 ee fb 97 09 00 cc 80 25 ba} (length 0xc3)
  //                }
  //              }
  //            }
  //            len: len = 0x3c (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x1 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000280 = 0;
  *(uint32_t*)0x200000000288 = 0;
  *(uint64_t*)0x200000000290 = 0x200000000040;
  *(uint64_t*)0x200000000040 = 0x200000000300;
  memcpy((void*)0x200000000300,
         "\x3c\x00\x00\x00\x10\x00\x3b\x15\x28\xbd\x70\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00",
         20);
  *(uint32_t*)0x200000000314 = 0;
  memcpy(
      (void*)0x200000000318,
      "\xf7\x00\x00\x00\x00\x00\x00\x00\x14\x00\x12\x80\x09\x00\x01\x00\x76\x65"
      "\x74\x68\x00\x00\x00\x00\x04\x00\x02\x80\x05\x00\x10\x00\x14\x00\x00\x00"
      "\xb6\x66\xd5\x94\x00\x8a\xa3\xf5\x51\xa6\x4d\x78\x17\xa9\xb7\xf8\x56\x33"
      "\xfb\xae\x35\x8a\x73\x97\x29\xe1\x4e\x2e\x54\x7e\xf4\xc0\x15\xeb\x65\x6a"
      "\x64\x63\xe7\xca\xc4\xf9\x27\x3c\x5d\xb2\xa5\x13\x31\xbd\xd6\x27\xa7\xd4"
      "\x8d\xe0\xc0\x87\x56\x5e\x09\x28\x49\x81\x43\x7c\x1c\xff\x60\x52\x27\x7f"
      "\x59\x46\xbf\xaf\xe1\x18\xb9\x1d\x60\xf4\xaa\xa0\x61\x1b\xaa\x9b\x4e\xe6"
      "\xd1\x0d\x64\xb1\x16\x97\x7b\x90\xee\xbb\x9d\xca\xc8\xe5\xab\x5d\x46\x2d"
      "\x6a\xfa\x11\xe3\x42\xa8\xb6\x8e\x24\xac\x93\xb0\x9f\x80\x10\x4e\x27\xb6"
      "\x2a\xf6\xa7\x5d\x72\x9f\xcd\xe2\xcc\xcc\xf2\xd4\x2e\x0c\x46\xef\x4c\x9f"
      "\xdb\x8a\xe5\x4a\x9b\xa0\xee\xfb\x97\x09\x00\xcc\x80\x25\xba",
      195);
  *(uint64_t*)0x200000000048 = 0x3c;
  *(uint64_t*)0x200000000298 = 1;
  *(uint64_t*)0x2000000002a0 = 0;
  *(uint64_t*)0x2000000002a8 = 0;
  *(uint32_t*)0x2000000002b0 = 1;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000280ul, /*f=*/0ul);
}
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 < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}