// https://syzkaller.appspot.com/bug?id=e5ec25c5282aa2341e7429e1db5725a773782635
// 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 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)) {
  }
  //  mkdir arguments: [
  //    path: ptr[in, buffer] {
  //      buffer: {63 6f 6e 66 69 67 00} (length 0x7)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000000, "config\000", 7);
  syscall(
      __NR_mkdir, /*path=*/0x200000000000ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {63 6f 6e 66 69 67 00} (length 0x7)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {63 6f 6e 66 69 67 66 73 00} (length 0x9)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x200000000100, "config\000", 7);
  memcpy((void*)0x200000000200, "configfs\000", 9);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000100ul,
          /*type=*/0x200000000200ul, /*flags=*/0ul, /*data=*/0ul);
  //  mkdir arguments: [
  //    path: ptr[in, buffer] {
  //      buffer: {63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 74 2f 67 31
  //      00} (length 0x15)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000300, "config/usb_gadget/g1\000", 21);
  syscall(
      __NR_mkdir, /*path=*/0x200000000300ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  mkdir arguments: [
  //    path: ptr[in, buffer] {
  //      buffer: {63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 74 2f 67 31
  //      2f 66 75 6e 63 74 69 6f 6e 73 2f 75 61 63 32 2e 75 73 62 30 00}
  //      (length 0x29)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000500, "config/usb_gadget/g1/functions/uac2.usb0\000",
         41);
  syscall(
      __NR_mkdir, /*path=*/0x200000000500ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 74 2f 67 31
  //      2f 66 75 6e 63 74 69 6f 6e 73 2f 75 61 63 32 2e 75 73 62 30 2f 63 5f
  //      73 72 61 74 65 00} (length 0x31)
  //    }
  //    flags: open_flags = 0x1 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000600,
         "config/usb_gadget/g1/functions/uac2.usb0/c_srate\000", 49);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000600ul,
                /*flags=O_WRONLY*/ 1, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {34 34 31 46 30 2c 34 ca 26 34 83 85 ce 08 a6 47 bd 92 67 1b
  //      f5 8e bf 98 5e 2d 6c 66 c4 0d 80 e9 ed 03 5e 90 90 94 61 6c ac 97 1c
  //      79 38 92 53 a7 9e fa e2 74 fe d6 a6 e8 6a 55 71 65 df 7b 12 09 76 54
  //      0a 63 74 e0 bd 54 51 54 d5 e4 91 3a 5a ab 9c 7c 5e 69 18 2f 88 46 90
  //      b7 be f3 58 0c ca 69 33 6f 21 df 01 6d bb 7b 33 3c be 95 a4 fb}
  //      (length 0x6e)
  //    }
  //    count: len = 0x6e (8 bytes)
  //  ]
  memcpy((void*)0x200000000280,
         "\x34\x34\x31\x46\x30\x2c\x34\xca\x26\x34\x83\x85\xce\x08\xa6\x47\xbd"
         "\x92\x67\x1b\xf5\x8e\xbf\x98\x5e\x2d\x6c\x66\xc4\x0d\x80\xe9\xed\x03"
         "\x5e\x90\x90\x94\x61\x6c\xac\x97\x1c\x79\x38\x92\x53\xa7\x9e\xfa\xe2"
         "\x74\xfe\xd6\xa6\xe8\x6a\x55\x71\x65\xdf\x7b\x12\x09\x76\x54\x0a\x63"
         "\x74\xe0\xbd\x54\x51\x54\xd5\xe4\x91\x3a\x5a\xab\x9c\x7c\x5e\x69\x18"
         "\x2f\x88\x46\x90\xb7\xbe\xf3\x58\x0c\xca\x69\x33\x6f\x21\xdf\x01\x6d"
         "\xbb\x7b\x33\x3c\xbe\x95\xa4\xfb",
         110);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000280ul, /*count=*/0x6eul);
}
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;
}