// 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/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_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_openat
#define __NR_openat 56
#endif
#ifndef __NR_writev
#define __NR_writev 66
#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 < 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)) {
  }
  //  openat$smackfs_ambient arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 73 79 73 2f 66 73 2f 73 6d 61 63 6b 66 73 2f 61 6d 62 69
  //      65 6e 74 00} (length 0x18)
  //    }
  //    flags: const = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_smackfs_label
  memcpy((void*)0x20000000, "/sys/fs/smackfs/ambient\000", 24);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000000ul,
                /*flags=*/2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  writev arguments: [
  //    fd: fd (resource)
  //    vec: ptr[in, array[iovec[in, array[int8]]]] {
  //      array[iovec[in, array[int8]]] {
  //        iovec[in, array[int8]] {
  //          addr: ptr[in, buffer] {
  //            buffer: {6f 3e 72 71 c6 e1 c7 37 bf a8 5b 61 c5 58 70 f1 8e 04
  //            2d 38 ac 11 99 92 a0 bb 98 dd f0 54 52 23 e7 d2 16 c8 bd fb f7
  //            e1 d3 58 c9 ad c9 86 60 62 5e 5a 7f 38 80 ac da 34 e8 df e2 5b
  //            33 1a 75 18 23 f1 8c a4 38 fa 45 d8 aa 14 6c ad 84 eb 31 9c f6
  //            6e 1b 74 d6 bd 8c 4a 50 95 8e fd aa 40 5e b0} (length 0x60)
  //          }
  //          len: len = 0x60 (8 bytes)
  //        }
  //        iovec[in, array[int8]] {
  //          addr: nil
  //          len: len = 0x0 (8 bytes)
  //        }
  //        iovec[in, array[int8]] {
  //          addr: nil
  //          len: len = 0x0 (8 bytes)
  //        }
  //        iovec[in, array[int8]] {
  //          addr: nil
  //          len: len = 0x0 (8 bytes)
  //        }
  //      }
  //    }
  //    vlen: len = 0x4 (8 bytes)
  //  ]
  *(uint64_t*)0x20001200 = 0x20000040;
  memcpy((void*)0x20000040,
         "\x6f\x3e\x72\x71\xc6\xe1\xc7\x37\xbf\xa8\x5b\x61\xc5\x58\x70\xf1\x8e"
         "\x04\x2d\x38\xac\x11\x99\x92\xa0\xbb\x98\xdd\xf0\x54\x52\x23\xe7\xd2"
         "\x16\xc8\xbd\xfb\xf7\xe1\xd3\x58\xc9\xad\xc9\x86\x60\x62\x5e\x5a\x7f"
         "\x38\x80\xac\xda\x34\xe8\xdf\xe2\x5b\x33\x1a\x75\x18\x23\xf1\x8c\xa4"
         "\x38\xfa\x45\xd8\xaa\x14\x6c\xad\x84\xeb\x31\x9c\xf6\x6e\x1b\x74\xd6"
         "\xbd\x8c\x4a\x50\x95\x8e\xfd\xaa\x40\x5e\xb0",
         96);
  *(uint64_t*)0x20001208 = 0x60;
  *(uint64_t*)0x20001210 = 0;
  *(uint64_t*)0x20001218 = 0;
  *(uint64_t*)0x20001220 = 0;
  *(uint64_t*)0x20001228 = 0;
  *(uint64_t*)0x20001230 = 0;
  *(uint64_t*)0x20001238 = 0;
  syscall(__NR_writev, /*fd=*/r[0], /*vec=*/0x20001200ul, /*vlen=*/4ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000,
          /*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=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}