// https://syzkaller.appspot.com/bug?id=5a34035b13d7f4215357b46093ca6d5c45c93f93
// 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>

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 long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    unsigned long nb = a1;
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(nb % 10);
      nb /= 10;
    }
    return open(buf, a2 & ~O_CREAT, 0);
  }
}

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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$sysfs arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    dir: ptr[in, buffer] {
  //      buffer: {2f 73 79 73 2f 6b 65 72 6e 65 6c 2f 61 64 64 72 65 73 73 5f
  //      62 69 74 73} (length 0x18)
  //    }
  //    flags: open_flags = 0x41180 (4 bytes)
  //    mode: open_mode = 0x142 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000140, "/sys/kernel/address_bits", 24);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*dir=*/0x200000000140ul,
                /*flags=O_NOCTTY|O_NOATIME|O_EXCL|0x1000*/ 0x41180,
                /*mode=S_IWOTH|S_IXUSR|S_IRUSR*/ 0x142);
  if (res != -1)
    r[0] = res;
  //  syz_open_dev$loop arguments: [
  //    dev: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6c 6f 6f 70 23 00} (length 0xb)
  //    }
  //    id: intptr = 0x18bdb (8 bytes)
  //    flags: open_flags = 0x325967a866143452 (8 bytes)
  //  ]
  //  returns fd_loop
  memcpy((void*)0x200000000100, "/dev/loop#\000", 11);
  res = -1;
  res = syz_open_dev(
      /*dev=*/0x200000000100, /*id=*/0x18bdb,
      /*flags=O_SYNC|O_NOATIME|O_CREAT|FASYNC|O_APPEND|0x325967a866000012*/
      0x325967a866143452);
  if (res != -1)
    r[1] = res;
  //  ioctl$LOOP_CONFIGURE arguments: [
  //    fd: fd_loop (resource)
  //    cmd: const = 0x4c0a (4 bytes)
  //    arg: ptr[in, loop_config] {
  //      loop_config {
  //        fd: fd_loop (resource)
  //        block_size: int32 = 0x0 (4 bytes)
  //        info: loop_info64 {
  //          lo_device: const = 0x2a00 (8 bytes)
  //          lo_inode: const = 0x80010000 (8 bytes)
  //          lo_rdevice: const = 0x0 (8 bytes)
  //          lo_offset: int64 = 0x1 (8 bytes)
  //          lo_sizelimit: int64 = 0x0 (8 bytes)
  //          lo_number: const = 0x0 (4 bytes)
  //          lo_enc_type: lo_encrypt_type = 0x0 (4 bytes)
  //          lo_enc_key_size: int32 = 0x14 (4 bytes)
  //          lo_flags: lo_flags = 0xd (4 bytes)
  //          lo_file_name: buffer: {fe e8 a2 ab 78 fc 97 9f d1 e0 0d 96 07 20
  //          00 00 1e a8 9d e2 b7 fb 00 00 e6 00 80 b8 78 5d 96 00 01 00 00 00
  //          00 00 00 00 00 00 00 7e ff f1 00 00 40 00 00 00 00 00 00 00 00 00
  //          00 00 00 00 00 00} (length 0x40) lo_crypt_name: buffer: {28 09 e8
  //          db e1 08 59 89 48 22 4a d5 4a fa c1 1d 87 53 97 bd b2 2d 00 00 b4
  //          20 a1 a9 3c 52 7d 3d 45 8d d4 99 28 61 ac 00 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 0x40)
  //          lo_enc_key: buffer: {f4 bd 00 00 00 80 19 00 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 0x20)
  //          lo_init: array[int64] {
  //            int64 = 0x8 (8 bytes)
  //            int64 = 0xffffffff9673e35d (8 bytes)
  //          }
  //        }
  //        reserved: 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 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 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 0x40)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x2000000002c0 = r[0];
  *(uint32_t*)0x2000000002c4 = 0;
  *(uint64_t*)0x2000000002c8 = 0x2a00;
  *(uint64_t*)0x2000000002d0 = 0x80010000;
  *(uint64_t*)0x2000000002d8 = 0;
  *(uint64_t*)0x2000000002e0 = 1;
  *(uint64_t*)0x2000000002e8 = 0;
  *(uint32_t*)0x2000000002f0 = 0;
  *(uint32_t*)0x2000000002f4 = 0;
  *(uint32_t*)0x2000000002f8 = 0x14;
  *(uint32_t*)0x2000000002fc = 0xd;
  memcpy((void*)0x200000000300,
         "\xfe\xe8\xa2\xab\x78\xfc\x97\x9f\xd1\xe0\x0d\x96\x07\x20\x00\x00\x1e"
         "\xa8\x9d\xe2\xb7\xfb\x00\x00\xe6\x00\x80\xb8\x78\x5d\x96\x00\x01\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x7e\xff\xf1\x00\x00\x40\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
         64);
  memcpy((void*)0x200000000340,
         "\x28\x09\xe8\xdb\xe1\x08\x59\x89\x48\x22\x4a\xd5\x4a\xfa\xc1\x1d\x87"
         "\x53\x97\xbd\xb2\x2d\x00\x00\xb4\x20\xa1\xa9\x3c\x52\x7d\x3d\x45\x8d"
         "\xd4\x99\x28\x61\xac\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
         64);
  memcpy((void*)0x200000000380,
         "\xf4\xbd\x00\x00\x00\x80\x19\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
         32);
  *(uint64_t*)0x2000000003a0 = 8;
  *(uint64_t*)0x2000000003a8 = 0xffffffff9673e35d;
  memset((void*)0x2000000003b0, 0, 64);
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x4c0a, /*arg=*/0x2000000002c0ul);
  //  ioctl$LOOP_CHANGE_FD arguments: [
  //    fd: fd_loop (resource)
  //    cmd: const = 0x4c06 (4 bytes)
  //    arg: fd (resource)
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x4c06, /*arg=*/r[0]);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*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=*/0x200001000000ul, /*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;
}