// https://syzkaller.appspot.com/bug?id=2431068eb52548f20447545f1948b727e87e720a
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <setjmp.h>
#include <signal.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>

unsigned long long procid;

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) &&
      (addr < prog_start || addr > prog_end)) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler()
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  {                                                                            \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    }                                                                          \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
  }

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms()
{
  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 kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  int i;
  for (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) {
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

static void execute_one();

#define WAIT_FLAGS __WALL

static void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      reset_test();
      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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one()
{
  long res = 0;
  NONFAILING(*(uint32_t*)0x200000c0 = 0);
  NONFAILING(*(uint32_t*)0x200000c4 = 0);
  NONFAILING(*(uint32_t*)0x200000c8 = 0);
  NONFAILING(*(uint32_t*)0x200000cc = 0);
  NONFAILING(*(uint32_t*)0x200000d0 = 0);
  NONFAILING(*(uint32_t*)0x200000d4 = 0xa);
  NONFAILING(*(uint32_t*)0x200000d8 = 0);
  NONFAILING(*(uint32_t*)0x200000dc = 0);
  NONFAILING(memcpy((void*)0x200000e0,
                    "\xed\x75\x58\x54\x7e\x3c\x48\x88\x77\xe3\xe7\xf8\x41\xff"
                    "\x9f\x65\x6e\x70\xfb\x5c\x40\x98\x66\x58\xa7\xe8\xfa\x54"
                    "\x4c\x21\x1a\x01\xa8\x1f\x97\x50\xaf\xe3\xb7\xa5\x69\x6e"
                    "\xc8\xbf\xe7\xa9\x07\x57\xae\xd8\xc5\x92\xd2\x6f\x37\x87"
                    "\xb2\xc2\x46\x29\x05\x47\x6f\xbd",
                    64));
  NONFAILING(memcpy((void*)0x20000120, "\xc1\x7d\xd3\xc6\x4f\x8b\x18\x87\x7b"
                                       "\xae\x41\x04\x15\x0b\xb7\x45\x24\x76"
                                       "\xef\x8e\x5d\x49\xfe\xfe\x8d\x26\x91"
                                       "\x1a\x11\xaa\x5e\x3e",
                    32));
  NONFAILING(*(uint64_t*)0x20000140 = 0);
  NONFAILING(*(uint64_t*)0x20000148 = 0);
  NONFAILING(*(uint32_t*)0x20000150 = 0);
  syscall(__NR_ioctl, -1, 0x4c02, 0x200000c0);
  NONFAILING(memcpy((void*)0x20000080,
                    "\xaa\xaa\xaa\x48\xe1\xb8\xe4\x63\x4d\xef\x42\x44\x29\xaa"
                    "\xaa\x00\x86\xdd\x60\x50\xa0\x9c\x00\x08\x00\x00\xfe\xa0"
                    "\x3c\x00\x00\x00\x00\xdf\x00\x00\x10\x09\x86\x5c",
                    40));
  NONFAILING(*(uint32_t*)0x20000040 = 0);
  NONFAILING(*(uint32_t*)0x20000044 = 0);
  NONFAILING(*(uint32_t*)0x20000048 = 0);
  NONFAILING(*(uint32_t*)0x2000004c = 0);
  NONFAILING(*(uint32_t*)0x20000050 = 0);
  NONFAILING(*(uint32_t*)0x20000054 = 0);
  res = syscall(__NR_socket, 0xa, 2, 0);
  if (res != -1)
    r[0] = res;
  NONFAILING(*(uint32_t*)0x20000080 = 0);
  syscall(__NR_setsockopt, r[0], 0, 0x40, 0x20000080, 4);
}
int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  install_segv_handler();
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}