// https://syzkaller.appspot.com/bug?id=ff526a91a38ca1d1ce496abdfeb1c7f44cb6f779
// 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)) {
  }
  //  openat$uhid arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 75 68 69 64 00} (length 0xa)
  //    }
  //    flags: uhid_open_flags = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_uhid
  memcpy((void*)0x200000000000, "/dev/uhid\000", 10);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000000ul, /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write$UHID_CREATE2 arguments: [
  //    fd: fd_uhid (resource)
  //    data: ptr[in, uhid_req[UHID_CREATE2, uhid_create2_req]] {
  //      uhid_req[UHID_CREATE2, uhid_create2_req] {
  //        type: const = 0xb (4 bytes)
  //        data: uhid_create2_req {
  //          name: buffer: {73 79 7a 30 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 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 0x80) phys: buffer: {73 79 7a 31 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) uniq: buffer: {73 79 7a
  //          30 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)
  //          rd_size: len = 0x43 (2 bytes)
  //          bus: int16 = 0x3 (2 bytes)
  //          vendor: int32 = 0x4d8 (4 bytes)
  //          product: int32 = 0xc002 (4 bytes)
  //          version: int32 = 0x0 (4 bytes)
  //          country: int32 = 0x0 (4 bytes)
  //          rd_data: buffer: {05 01 09 00 a1 01 85 11 09 01 15 00 26 ff 00 75
  //          08 95 02 81 02 85 21 09 02 15 00 26 ff 00 75 08 95 01 81 02 85 91
  //          09 04 15 00 26 ff 00 75 08 95 01 91 02 85 92 09 03 15 00 26 ff 00
  //          75 08 95 01 91 02 c0} (length 0x43)
  //        }
  //      }
  //    }
  //    len: len = 0x15b (8 bytes)
  //  ]
  *(uint32_t*)0x200000000100 = 0xb;
  memcpy(
      (void*)0x200000000104,
      "syz0\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000",
      128);
  memcpy((void*)0x200000000184,
         "syz1\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000",
         64);
  memcpy((void*)0x2000000001c4,
         "syz0\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000",
         64);
  *(uint16_t*)0x200000000204 = 0x43;
  *(uint16_t*)0x200000000206 = 3;
  *(uint32_t*)0x200000000208 = 0x4d8;
  *(uint32_t*)0x20000000020c = 0xc002;
  *(uint32_t*)0x200000000210 = 0;
  *(uint32_t*)0x200000000214 = 0;
  memcpy((void*)0x200000000218,
         "\x05\x01\x09\x00\xa1\x01\x85\x11\x09\x01\x15\x00\x26\xff\x00\x75\x08"
         "\x95\x02\x81\x02\x85\x21\x09\x02\x15\x00\x26\xff\x00\x75\x08\x95\x01"
         "\x81\x02\x85\x91\x09\x04\x15\x00\x26\xff\x00\x75\x08\x95\x01\x91\x02"
         "\x85\x92\x09\x03\x15\x00\x26\xff\x00\x75\x08\x95\x01\x91\x02\xc0",
         67);
  syscall(__NR_write, /*fd=*/r[0], /*data=*/0x200000000100ul, /*len=*/0x15bul);
}
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;
}