// https://syzkaller.appspot.com/bug?id=6dcd14a729df98f989c7b76d254226ae67084efd
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdio.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>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <stdint.h>
#include <string.h>

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

static void fail(const char* msg, ...)
{
  int e = errno;
  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);
}

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 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;
    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 void test();

void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("loop fork 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;
      }
    }
  }
}

#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_write
#define __NR_write 4
#endif
#ifndef __NR_readv
#define __NR_readv 145
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

long r[1];
void test()
{
  memset(r, -1, sizeof(r));
  syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0);
  memcpy((void*)0x20000000, "/dev/sg#", 9);
  r[0] = syz_open_dev(0x20000000, 0, 2);
  *(uint32_t*)0x20cd9fa0 = 0;
  *(uint32_t*)0x20cd9fa4 = 0;
  *(uint16_t*)0x20cd9fa8 = 2;
  *(uint16_t*)0x20cd9faa = 0;
  *(uint32_t*)0x20cd9fac = 0xfffffff9;
  *(uint32_t*)0x20cd9fb0 = 0;
  *(uint32_t*)0x20cd9fb4 = 0x7530;
  *(uint16_t*)0x20cd9fb8 = 1;
  *(uint16_t*)0x20cd9fba = 0;
  *(uint32_t*)0x20cd9fbc = 1;
  *(uint32_t*)0x20cd9fc0 = 0x77359400;
  *(uint32_t*)0x20cd9fc4 = 0;
  *(uint16_t*)0x20cd9fc8 = 0x8000;
  *(uint16_t*)0x20cd9fca = 8;
  *(uint32_t*)0x20cd9fcc = 0xfffffe01;
  *(uint32_t*)0x20cd9fd0 = 0;
  *(uint32_t*)0x20cd9fd4 = 0x2710;
  *(uint16_t*)0x20cd9fd8 = 0x3b1b;
  *(uint16_t*)0x20cd9fda = 3;
  *(uint32_t*)0x20cd9fdc = 0x19c;
  syscall(__NR_write, r[0], 0x20cd9fa0, 0x60);
  *(uint32_t*)0x20b16000 = 0x20dc8000;
  *(uint32_t*)0x20b16004 = 0xa5;
  syscall(__NR_readv, r[0], 0x20b16000, 1);
}

int main()
{
  for (;;) {
    loop();
  }
}