// https://syzkaller.appspot.com/bug?id=2c5636c8c65dda872edd4baaefb53fe168d56788
// 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/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_bpf
#define __NR_bpf 386
#endif
#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

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 (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 15000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  *(uint32_t*)0x20000000 = 1;
  *(uint32_t*)0x20000004 = 8;
  *(uint64_t*)0x20000008 = 0x20000400;
  memcpy(
      (void*)0x20000400,
      "\x7a\x0a\xf8\xff\x75\x25\x70\x35\xbf\xa1\x00\x00\x00\x00\x00\x00\x07\x01"
      "\x00\x00\xf9\xff\xff\xff\xb7\x02\x00\x00\x05\x00\x00\x00\xbf\x13\x08\x00"
      "\x00\x00\x00\x00\x85\x00\x00\x00\x71\x00\x00\x00\xb7\x00\x00\x00\x00\x00"
      "\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00\xb2\x59\x52\x85\xfa\xa6\xea\xd0"
      "\x16\x91\x91\xd5\x4f\x81\x96\x21\x7f\xc5\x60\xe2\xfc\x91\xf6\xda\x4d\xad"
      "\x4f\xdc\x2e\xb1\xb5\x98\x6f\xc4\xa3\xf6\x11\xa7\xc8\xed\xd3\xaa\x5d\x6e"
      "\xe7\xab\x10\xb1\xa2\x97\xcf\x52\x86\x66\xd1\xdd\xd7\x3f\x30\x47\xd2\x48"
      "\xdf\x06\x12\x22\x19\x31\x65\x27\x4b\xc7\xf2\x38\x2f\x6c\xda\x4b\xfd\xd4"
      "\x5b\xe5\x83\x82\x3c\x0f\x09\x62\x1f\x3c\x1c\x65\xee\x19\xee\x87\x5d\xaf"
      "\x45\x00\x6a\x4c\x4e\xa5\xe1\x5b\x2f\x96\x18\xd5\x47\x24\x4a\x22\x00\x00"
      "\x00\x00\x00\x00\xdb\x45\x36\x20\xce\x72\x43\xd1\xae\xbd\xb6\x38\xd9\x1d"
      "\xbe\xf6\x61\x93\x58\x39\xc7\x7e\xdf\x2d\x34\xb1\x2c\xd4\x8a\x0c\x20\xfb"
      "\x7d\xd8\x43\x26\x7e\x03\x31\x75\x9f\x4e\xc6\xb5\xb0\xaf\x58\xe6\x04\xf4"
      "\x94\x2e\xb6\x13\xef\xf2\x89\x02\x6d\x50\x45\xef\x76\xd7\xd8\x64\x40\x9e"
      "\xb2\xdc\x77\x18\xa0\x9f\x48\x86\xaf\xc2\x6a\xbb\xa3\x46\x35\xd0\xe8\xf5"
      "\x98\xa5\x1b\xc7\x42\x13\x5a\x6e\x1d\x33\xfe\x22\x6c\x94\x4b\xc7\x6b\xe4"
      "\x0d\x43\x5a\xa8\xb5\x20\x2d\xb7\x61\x01\x4b\x1b\x99\x9a\x12\xdf\x6b\xee"
      "\x43\x1a\x66\x81",
      310);
  *(uint64_t*)0x20000010 = 0x20000100;
  memcpy((void*)0x20000100, "GPL\000", 4);
  *(uint32_t*)0x20000018 = 0;
  *(uint32_t*)0x2000001c = 0;
  *(uint64_t*)0x20000020 = 0;
  *(uint32_t*)0x20000028 = 0;
  *(uint32_t*)0x2000002c = 0;
  memset((void*)0x20000030, 0, 16);
  *(uint32_t*)0x20000040 = 0;
  *(uint32_t*)0x20000044 = 0;
  *(uint32_t*)0x20000048 = -1;
  *(uint32_t*)0x2000004c = 8;
  *(uint64_t*)0x20000050 = 0;
  *(uint32_t*)0x20000058 = 0;
  *(uint32_t*)0x2000005c = 0x10;
  *(uint64_t*)0x20000060 = 0;
  *(uint32_t*)0x20000068 = 0;
  *(uint32_t*)0x2000006c = 0;
  *(uint32_t*)0x20000070 = -1;
  *(uint32_t*)0x20000074 = 0;
  *(uint64_t*)0x20000078 = 0;
  *(uint64_t*)0x20000080 = 0;
  *(uint32_t*)0x20000088 = 0x10;
  *(uint32_t*)0x2000008c = 0;
  res = syscall(__NR_bpf, /*cmd=*/5, /*arg=*/0x20000000, /*size=*/0x48);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x20000080 = r[0];
  *(uint32_t*)0x20000084 = 0x2000000;
  *(uint32_t*)0x20000088 = 0xe;
  *(uint32_t*)0x2000008c = 0x55;
  *(uint64_t*)0x20000090 = 0x20000140;
  memcpy((void*)0x20000140,
         "\xa0\x6a\xd8\x76\xd5\x6a\x00\x64\xd0\x82\x77\x8c\x39\x38", 14);
  *(uint64_t*)0x20000098 = 0x20000380;
  *(uint32_t*)0x200000a0 = 0;
  *(uint32_t*)0x200000a4 = 0x4000000;
  *(uint32_t*)0x200000a8 = 0;
  *(uint32_t*)0x200000ac = 0;
  *(uint64_t*)0x200000b0 = 0x20000000;
  *(uint64_t*)0x200000b8 = 0x20000000;
  *(uint32_t*)0x200000c0 = 0;
  *(uint32_t*)0x200000c4 = 0;
  *(uint32_t*)0x200000c8 = 0;
  syscall(__NR_bpf, /*cmd=*/0xa, /*arg=*/0x20000080, /*size=*/0x28);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32, /*fd=*/-1,
          /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x20000000, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32, /*fd=*/-1,
          /*offset=*/0);
  syscall(__NR_mmap, /*addr=*/0x21000000, /*len=*/0x1000, /*prot=*/0,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32, /*fd=*/-1,
          /*offset=*/0);
  loop();
  return 0;
}