// https://syzkaller.appspot.com/bug?id=41250a7298910b561be8f409f473ca8588ef1073
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.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 void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

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;
}

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
  int iter = 0;
  DIR* dp = 0;
  const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW;

retry:
  while (umount2(dir, umount_flags) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  struct dirent* ep = 0;
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    while (umount2(filename, umount_flags) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EPERM) {
        int fd = open(filename, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exit(1);
      if (umount2(filename, umount_flags))
        exit(1);
    }
  }
  closedir(dp);
  for (int i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EPERM) {
        int fd = open(dir, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, umount_flags))
          exit(1);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exit(1);
  }
}

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");
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

#define USLEEP_FORKED_CHILD (3 * 50 * 1000)

static long handle_clone_ret(long ret)
{
  if (ret != 0) {
    return ret;
  }
  usleep(USLEEP_FORKED_CHILD);
  syscall(__NR_exit, 0);
  while (1) {
  }
}

static long syz_clone(volatile long flags, volatile long stack,
                      volatile long stack_len, volatile long ptid,
                      volatile long ctid, volatile long tls)
{
  long sp = (stack + stack_len) & ~15;
  long ret = (long)syscall(__NR_clone, flags & ~CLONE_VM, sp, ptid, ctid, tls);
  return handle_clone_ret(ret);
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      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;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[1] = {0x0};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_clone arguments: [
  //    flags: clone_flags = 0x80 (8 bytes)
  //    stack: nil
  //    stack_len: bytesize = 0xffffffffffffffa4 (8 bytes)
  //    parentid: nil
  //    childtid: nil
  //    tls: ptr[in, buffer] {
  //      buffer: {37 c8 01 a2 31 e4 98 d4 a3 7e 69 99 21 53 e8 d3 1c c3 db 26
  //      f4 09 cc 09 65 d1 5f 41 ec 7b 71 96 bc 98 24 22 ef ac 6c e5 2a d0 1a
  //      ad 0c 99 16 15 0b 76 2a 7e 5c 5d cd 4d 8d f7 9f dd 82 46 f8 ef e6 2d
  //      c6 60 d8 16 a2 d3 04 cb 5a 9c a3 bd 60 cd 9c 73 69 87 b6 9b 96 30 f4
  //      2b 5b a4 5c f8 2a cb d2 df 16 8d dd ad b3 23 d6 48 06 fd 40 0d b9 ce
  //      5f b8 fa af 49 32 64 e7 3d 6f c2 d0 6e 94 4f cb 12 0e 51 b0 2c be 1b
  //      83 1b 14 b4 bc 47 a2 54 c1 18 8e 6b 3a 7a 7a 85 55 f4 d3 3d fd 50 8e
  //      2e 82 91 83 89 16 80 d0 da f3 5d 53 de a3 65 bd d7 50 3c 16 22 31 60
  //      a6 7a 8e eb d9 72 8b c3 cd 3d 54 55 13 bf e7 ae ad a8 fd 13 1d cb 60
  //      04 11 26 b5 ab 2d 13 7a b8 e5 8e 1c 48 ca 3d e4 82 01 fc 81 47 5a 5f
  //      a5 b1 0d d6 d1 c4} (length 0xe9)
  //    }
  //  ]
  //  returns pid
  memcpy(
      (void*)0x200000000140,
      "\x37\xc8\x01\xa2\x31\xe4\x98\xd4\xa3\x7e\x69\x99\x21\x53\xe8\xd3\x1c\xc3"
      "\xdb\x26\xf4\x09\xcc\x09\x65\xd1\x5f\x41\xec\x7b\x71\x96\xbc\x98\x24\x22"
      "\xef\xac\x6c\xe5\x2a\xd0\x1a\xad\x0c\x99\x16\x15\x0b\x76\x2a\x7e\x5c\x5d"
      "\xcd\x4d\x8d\xf7\x9f\xdd\x82\x46\xf8\xef\xe6\x2d\xc6\x60\xd8\x16\xa2\xd3"
      "\x04\xcb\x5a\x9c\xa3\xbd\x60\xcd\x9c\x73\x69\x87\xb6\x9b\x96\x30\xf4\x2b"
      "\x5b\xa4\x5c\xf8\x2a\xcb\xd2\xdf\x16\x8d\xdd\xad\xb3\x23\xd6\x48\x06\xfd"
      "\x40\x0d\xb9\xce\x5f\xb8\xfa\xaf\x49\x32\x64\xe7\x3d\x6f\xc2\xd0\x6e\x94"
      "\x4f\xcb\x12\x0e\x51\xb0\x2c\xbe\x1b\x83\x1b\x14\xb4\xbc\x47\xa2\x54\xc1"
      "\x18\x8e\x6b\x3a\x7a\x7a\x85\x55\xf4\xd3\x3d\xfd\x50\x8e\x2e\x82\x91\x83"
      "\x89\x16\x80\xd0\xda\xf3\x5d\x53\xde\xa3\x65\xbd\xd7\x50\x3c\x16\x22\x31"
      "\x60\xa6\x7a\x8e\xeb\xd9\x72\x8b\xc3\xcd\x3d\x54\x55\x13\xbf\xe7\xae\xad"
      "\xa8\xfd\x13\x1d\xcb\x60\x04\x11\x26\xb5\xab\x2d\x13\x7a\xb8\xe5\x8e\x1c"
      "\x48\xca\x3d\xe4\x82\x01\xfc\x81\x47\x5a\x5f\xa5\xb1\x0d\xd6\xd1\xc4",
      233);
  res = -1;
  res = syz_clone(/*flags=CLONE_NEWTIME*/ 0x80, /*stack=*/0,
                  /*stack_len=*/0xffffffffffffffa4, /*parentid=*/0,
                  /*childtid=*/0, /*tls=*/0x200000000140);
  if (res != -1)
    r[0] = res;
  //  perf_event_open arguments: [
  //    attr: ptr[in, perf_event_attr] {
  //      perf_event_attr {
  //        type: perf_event_type = 0x1 (4 bytes)
  //        size: len = 0x80 (4 bytes)
  //        config0: int8 = 0x3 (1 bytes)
  //        config1: int8 = 0x0 (1 bytes)
  //        config2: int8 = 0x0 (1 bytes)
  //        config3: int8 = 0x0 (1 bytes)
  //        config4: const = 0x0 (4 bytes)
  //        sample_freq: int64 = 0x400 (8 bytes)
  //        sample_type: perf_sample_type = 0x10506 (8 bytes)
  //        read_format: perf_read_format = 0x0 (8 bytes)
  //        disabled: int64 = 0x0 (0 bytes)
  //        inherit: int64 = 0x0 (0 bytes)
  //        pinned: int64 = 0x0 (0 bytes)
  //        exclusive: int64 = 0x0 (0 bytes)
  //        exclude_user: int64 = 0x0 (0 bytes)
  //        exclude_kernel: int64 = 0x0 (0 bytes)
  //        exclude_hv: int64 = 0x0 (0 bytes)
  //        exclude_idle: int64 = 0x0 (0 bytes)
  //        mmap: int64 = 0x0 (0 bytes)
  //        comm: int64 = 0x0 (0 bytes)
  //        freq: int64 = 0x0 (0 bytes)
  //        inherit_stat: int64 = 0x0 (0 bytes)
  //        enable_on_exec: int64 = 0x0 (0 bytes)
  //        task: int64 = 0x0 (0 bytes)
  //        watermark: int64 = 0x0 (0 bytes)
  //        precise_ip: int64 = 0x0 (0 bytes)
  //        mmap_data: int64 = 0x0 (0 bytes)
  //        sample_id_all: int64 = 0x0 (0 bytes)
  //        exclude_host: int64 = 0x0 (0 bytes)
  //        exclude_guest: int64 = 0x0 (0 bytes)
  //        exclude_callchain_kernel: int64 = 0x0 (0 bytes)
  //        exclude_callchain_user: int64 = 0x0 (0 bytes)
  //        mmap2: int64 = 0x0 (0 bytes)
  //        comm_exec: int64 = 0x0 (0 bytes)
  //        use_clockid: int64 = 0x0 (0 bytes)
  //        context_switch: int64 = 0x0 (0 bytes)
  //        write_backward: int64 = 0x0 (0 bytes)
  //        namespaces: int64 = 0x0 (0 bytes)
  //        ksymbol: int64 = 0x0 (0 bytes)
  //        bpf_event: int64 = 0x0 (0 bytes)
  //        aux_output: int64 = 0x0 (0 bytes)
  //        cgroup: int64 = 0x0 (0 bytes)
  //        text_poke: int64 = 0x0 (0 bytes)
  //        build_id: int64 = 0x0 (0 bytes)
  //        inherit_thread: int64 = 0x0 (0 bytes)
  //        remove_on_exec: int64 = 0x1 (0 bytes)
  //        sigtrap: int64 = 0x1 (0 bytes)
  //        __reserved_1: const = 0x0 (8 bytes)
  //        wakeup_events: int32 = 0x0 (4 bytes)
  //        bp_type: perf_bp_type = 0x2 (4 bytes)
  //        bp_config: union perf_bp_config {
  //          perf_config_ext: perf_config_ext {
  //            config1: int64 = 0x1000000000000801 (8 bytes)
  //            config2: int64 = 0x1 (8 bytes)
  //          }
  //        }
  //        branch_sample_type: perf_branch_sample_type = 0x7402 (8 bytes)
  //        sample_regs_user: int64 = 0x0 (8 bytes)
  //        sample_stack_user: int32 = 0x0 (4 bytes)
  //        clockid: clock_type = 0x3 (4 bytes)
  //        sample_regs_intr: int64 = 0x0 (8 bytes)
  //        aux_watermark: int32 = 0xffffffff (4 bytes)
  //        sample_max_stack: int16 = 0x3 (2 bytes)
  //        __reserved_2: const = 0x0 (2 bytes)
  //        aux_sample_size: int32 = 0x0 (4 bytes)
  //        __reserved_3: const = 0x0 (4 bytes)
  //        sig_data: int64 = 0x0 (8 bytes)
  //      }
  //    }
  //    pid: pid (resource)
  //    cpu: intptr = 0x0 (8 bytes)
  //    group: fd_perf (resource)
  //    flags: perf_flags = 0x0 (8 bytes)
  //  ]
  //  returns fd_perf
  *(uint32_t*)0x200000000540 = 1;
  *(uint32_t*)0x200000000544 = 0x80;
  *(uint8_t*)0x200000000548 = 3;
  *(uint8_t*)0x200000000549 = 0;
  *(uint8_t*)0x20000000054a = 0;
  *(uint8_t*)0x20000000054b = 0;
  *(uint32_t*)0x20000000054c = 0;
  *(uint64_t*)0x200000000550 = 0x400;
  *(uint64_t*)0x200000000558 = 0x10506;
  *(uint64_t*)0x200000000560 = 0;
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 0, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 1, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 2, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 3, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 4, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 5, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 6, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 7, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 8, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 9, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 10, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 11, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 12, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 13, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 14, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 15, 2);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 17, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 18, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 19, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 20, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 21, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 22, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 23, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 24, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 25, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 26, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 27, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 28, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 29, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 30, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 31, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 32, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 33, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 34, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 35, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 1, 36, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 1, 37, 1);
  STORE_BY_BITMASK(uint64_t, , 0x200000000568, 0, 38, 26);
  *(uint32_t*)0x200000000570 = 0;
  *(uint32_t*)0x200000000574 = 2;
  *(uint64_t*)0x200000000578 = 0x1000000000000801;
  *(uint64_t*)0x200000000580 = 1;
  *(uint64_t*)0x200000000588 = 0x7402;
  *(uint64_t*)0x200000000590 = 0;
  *(uint32_t*)0x200000000598 = 0;
  *(uint32_t*)0x20000000059c = 3;
  *(uint64_t*)0x2000000005a0 = 0;
  *(uint32_t*)0x2000000005a8 = -1;
  *(uint16_t*)0x2000000005ac = 3;
  *(uint16_t*)0x2000000005ae = 0;
  *(uint32_t*)0x2000000005b0 = 0;
  *(uint32_t*)0x2000000005b4 = 0;
  *(uint64_t*)0x2000000005b8 = 0;
  syscall(__NR_perf_event_open, /*attr=*/0x200000000540ul, /*pid=*/r[0],
          /*cpu=*/0ul, /*group=*/(intptr_t)-1, /*flags=*/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;
  use_temporary_dir();
  loop();
  return 0;
}