syzkaller-repros/linux/d88dde89ebf9081fccad49ae0dd51d0f2917009d.c

// WARNING in kmalloc_slab (2)
// https://syzkaller.appspot.com/bug?id=d88dde89ebf9081fccad49ae0dd51d0f2917009d
// status:fixed
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h>

#include <stdint.h>
#include <string.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);
  }
}

long r[17];
void loop()
{
  memset(r, -1, sizeof(r));
  r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                 0xfffffffffffffffful, 0x0ul);
  memcpy((void*)0x202a0000,
         "\x2f\x64\x65\x76\x2f\x6c\x6f\x6f\x70\x23\x00", 11);
  r[2] = syz_open_dev(0x202a0000ul, 0x200000000004ul, 0x80ul);
  *(uint32_t*)0x20ed6000 = (uint32_t)0x0;
  *(uint32_t*)0x20ed6004 = (uint32_t)0x0;
  *(uint32_t*)0x20ed6008 = (uint32_t)0x0;
  *(uint32_t*)0x20ed600c = (uint32_t)0x0;
  *(uint32_t*)0x20ed6010 = (uint32_t)0x6361;
  *(uint32_t*)0x20ed6014 = (uint32_t)0xb;
  *(uint32_t*)0x20ed6018 = (uint32_t)0xffbffffffffffffa;
  *(uint32_t*)0x20ed601c = (uint32_t)0x1;
  memcpy((void*)0x20ed6020,
         "\x39\x9f\x23\x63\x1d\x00\x00\x00\x00\x00\x1a\x00\x5c\x69\x7b"
         "\xbc\x15\xf2\x32\xe3\xeb\xd7\xbe\xd6\x5f\x90\xb0\xe6\x33\x0e"
         "\xe7\x83\x1d\x19\xec\xf6\xaa\x04\xd5\x8d\x14\x43\x47\x44\x82"
         "\xe8\x50\x40\xe7\x49\x47\xeb\xb5\x08\x00\x00\x00\x00\x00\x00"
         "\x00\x30\xf3\xf3",
         64);
  memcpy((void*)0x20ed6060,
         "\xd5\xa4\x30\x74\x60\x54\x00\x00\x00\x08\xb7\xb8\x15\x79\xf6"
         "\xa4\x1c\x01\xf7\xcf\xc1\x33\x22\x35\x82\xab\x86\x7d\xac\x76"
         "\x7b\xaf",
         32);
  *(uint64_t*)0x20ed6080 = (uint64_t)0x26;
  *(uint64_t*)0x20ed6088 = (uint64_t)0x0;
  *(uint32_t*)0x20ed6090 = (uint32_t)0x0;
  r[16] = syscall(__NR_ioctl, r[2], 0xc0481273ul, 0x20ed6000ul);
}

int main()
{
  loop();
  return 0;
}