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Date: Thu, 26 Oct 2017 11:04:45 -0400
From: "Theodore Ts'o" <tytso@mit.edu>
To: Chen Feng <puck.chen@hisilicon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>, zhaoyukun@huawei.com,
        arnd@arndb.de, linux-kernel@vger.kernel.org,
        suzhuangluan@hisilicon.com, dan.zhao@hisilicon.com
Subject: Re: [PATCH RFC] random: fix syzkaller fuzzer test int overflow
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On Thu, Oct 26, 2017 at 04:25:15PM +0800, Chen Feng wrote:
> 
> 
> On 2017/10/25 16:49, Theodore Ts'o wrote:
> > Other people who have sent me fuzzer test reproducers are able to
> > reproduce syzkaller logs into a simple C program.  Can you explain to
> > me what the heck:
> > 
> >> r3 = syz_open_dev$urandom(&(0x7f000000a000)="2f6465762f7572616e646f6d00", 0x0, 0x0)
> > 
> > means?
> 
> Take a look at this:
> 
> https://github.com/google/syzkaller/blob/master/sys/linux/random.txt

Sorry, this *still* looks like gobbledygook.

What ioctls are you executing, and with what arguments?

*Please*, give me a C program I can compile.

					 -Ted