syzkaller-repros/linux/b67883c5ca3f239bc1e504a29f0e7b37ed42b376.c

// WARNING in __alloc_pages_slowpath (4)
// https://syzkaller.appspot.com/bug?id=b67883c5ca3f239bc1e504a29f0e7b37ed42b376
// status:open
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h>

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);
  }
}

uint64_t r[1] = {0xffffffffffffffff};
void loop()
{
  long res = 0;
  memcpy((void*)0x20000140, "/dev/loop#", 11);
  res = syz_open_dev(0x20000140, 0, 0);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x200001c0 = 0;
  *(uint32_t*)0x200001c4 = 0;
  *(uint32_t*)0x200001c8 = 0;
  *(uint32_t*)0x200001cc = 0;
  *(uint32_t*)0x200001d0 = 3;
  *(uint32_t*)0x200001d4 = 0xfffffffe;
  *(uint32_t*)0x200001d8 = 0x19;
  *(uint32_t*)0x200001dc = 0x18;
  memcpy((void*)0x200001e0,
         "\x00\x00\x00\x00\x01\x00\x00\x00\x00\xe5\x4c\x16\x62\x0f\x00\x00\x00"
         "\x65\x00\x00\x00\xed\xff\x00\x00\x7d\xb0\xe6\x33\x0e\xe7\xf9\xb3\x19"
         "\xd8\x00\x00\x18\xe5\x8d\x1c\x43\x47\x30\x00\xe1\x50\x26\xfb\x00\x00"
         "\x00\x80\x01\xd1\xa7\x33\x5d\x5b\xff\xff\x00\x01\xd7",
         64);
  memcpy((void*)0x20000220, "\xce\xe4\x00\x05\x00\x35\x00\xf7\xff\x00\x02\xff"
                            "\x00\x00\x00\x00\x02\x00\x00\x00\x00\x81\x00\x04"
                            "\xdc\x01\x86\x7d\xff\xfe\x02\x00",
         32);
  *(uint64_t*)0x20000240 = 0x3ff;
  *(uint64_t*)0x20000248 = 0;
  *(uint32_t*)0x20000250 = 0;
  syscall(__NR_ioctl, r[0], 0xc0481273, 0x200001c0);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  loop();
  return 0;
}