syzkaller-repros/linux/db3d758b925c38d8315465d3854168e2c8d16dcc.c

// panic: invalid allocation length: 0x0 (2)
// https://syzkaller.appspot.com/bug?id=db3d758b925c38d8315465d3854168e2c8d16dcc
// status:fixed
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  long res = 0;
  syscall(__NR_socketpair, 1, 5, 0, 0);
  syscall(__NR_ioctl, -1, 0x8912, 0x400200);
  memcpy((void*)0x200002c0, "./bus\x00", 6);
  res = syscall(__NR_creat, 0x200002c0, 0);
  if (res != -1)
    r[0] = res;
  syscall(__NR_ftruncate, r[0], 0x8200);
  memcpy((void*)0x20000040, "./bus\x00", 6);
  res = syscall(__NR_open, 0x20000040, 0x141042, 0);
  if (res != -1)
    r[1] = res;
  syscall(__NR_mmap, 0x20001000, 0xa000, 0x800002, 0x11, r[1], 0);
  memcpy((void*)0x20000000, "/dev/full\x00", 10);
  res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000000, 0, 0);
  if (res != -1)
    r[2] = res;
  syscall(__NR_pread64, r[2], 0x20002640, 0xfffffede, 0);
  return 0;
}