// https://syzkaller.appspot.com/bug?id=bd3860e571a12c18739719a7aff638acc9fe4072
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#ifndef __NR_pkey_alloc
#define __NR_pkey_alloc 330
#endif

#define _GNU_SOURCE

#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.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/time.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}

__attribute__((noreturn)) static void fail(const char* msg, ...)
{
  int e = errno;
  fflush(stdout);
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

__attribute__((noreturn)) static void exitf(const char* msg, ...)
{
  int e = errno;
  fflush(stdout);
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit(kRetryStatus);
}

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* uctx)
{
  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);
  }
  doexit(sig);
  for (;;) {
  }
}

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 uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block",
            (uint8_t)a1, (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    NONFAILING(strncpy(buf, (char*)a0, sizeof(buf)));
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

static uint64_t current_time_ms()
{
  struct timespec ts;

  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    fail("clock_gettime failed");
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void test();

void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("clone failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      test();
      doexit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      int res = waitpid(-1, &status, __WALL | WNOHANG);
      if (res == pid)
        break;
      usleep(1000);
      if (current_time_ms() - start > 5 * 1000) {
        kill(-pid, SIGKILL);
        kill(pid, SIGKILL);
        while (waitpid(-1, &status, __WALL) != pid) {
        }
        break;
      }
    }
  }
}

long r[19];
void* thr(void* arg)
{
  switch ((long)arg) {
  case 0:
    r[0] = syscall(__NR_pkey_alloc, 0x0ul, 0x0ul);
    break;
  case 1:
    NONFAILING(memcpy((void*)0x2090fff0,
                      "\x2f\x64\x65\x76\x2f\x73\x65\x71\x75\x65\x6e\x63"
                      "\x65\x72\x32\x00",
                      16));
    r[2] = syscall(__NR_openat, 0xffffffffffffff9cul, 0x2090fff0ul,
                   0x10000ul, 0x0ul);
    break;
  case 2:
    r[3] = syscall(__NR_mmap, 0x20000000ul, 0xf71000ul, 0x3ul, 0x32ul,
                   0xfffffffffffffffful, 0x0ul);
    break;
  case 3:
    NONFAILING(memcpy((void*)0x201f9ff5,
                      "\x2f\x64\x65\x76\x2f\x6c\x6f\x6f\x70\x23\x00",
                      11));
    r[5] = syz_open_dev(0x201f9ff5ul, 0x40000000006feul, 0x125080ul);
    break;
  case 4:
    NONFAILING(*(uint32_t*)0x20cd4000 = (uint32_t)0x0);
    r[7] = syscall(__NR_ioctl, 0xfffffffffffffffful, 0x40044581ul,
                   0x20cd4000ul);
    break;
  case 5:
    r[8] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                   0xfffffffffffffffful, 0x0ul);
    break;
  case 6:
    NONFAILING(*(uint8_t*)0x20318000 = (uint8_t)0x6);
    NONFAILING(*(uint8_t*)0x20318001 = (uint8_t)0x2);
    r[11] = syscall(__NR_ioctl, 0xfffffffffffffffful, 0x541cul,
                    0x20318000ul);
    break;
  case 7:
    r[12] = syscall(__NR_mmap, 0x20000000ul, 0xb36000ul, 0x1000001ul,
                    0x8031ul, 0xfffffffffffffffful, 0x0ul);
    break;
  case 8:
    r[13] = syscall(__NR_io_setup, 0x6ul, 0x20600ff8ul);
    break;
  case 9:
    NONFAILING(*(uint32_t*)0x200dbffc = (uint32_t)0x28);
    r[15] = syscall(__NR_getsockopt, 0xfffffffffffffffful, 0x0ul,
                    0x100000000000041ul, 0x20b69000ul, 0x200dbffcul);
    break;
  case 10:
    r[16] = syscall(__NR_mremap, 0x20001000ul, 0x1000ul, 0x4000ul,
                    0x2ul, 0x20005000ul);
    break;
  case 11:
    NONFAILING(*(uint64_t*)0x20005ff8 = (uint64_t)0x0);
    r[18] = syscall(__NR_mbind, 0x20002000ul, 0x4000ul, 0x0ul,
                    0x20005ff8ul, 0x5ul, 0x2ul);
    break;
  }
  return 0;
}

void test()
{
  long i;
  pthread_t th[24];

  memset(r, -1, sizeof(r));
  for (i = 0; i < 12; i++) {
    pthread_create(&th[i], 0, thr, (void*)i);
    usleep(rand() % 10000);
  }
  usleep(rand() % 100000);
}

int main()
{
  int i;
  for (i = 0; i < 8; i++) {
    if (fork() == 0) {
      install_segv_handler();
      loop();
      return 0;
    }
  }
  sleep(1000000);
  return 0;
}