linux-kernel - Re: KASAN: null-ptr-deref Write in io_file_get

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Message-ID: <408038f9-654c-611a-2c48-c1b5d660a6a7@kernel.dk>
Date:   Wed, 17 Aug 2022 08:22:29 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Jiacheng Xu <578001344xu@...il.com>, linux-kernel@...r.kernel.org,
        asml.silence@...il.co, io-uring@...r.kernel.org,
        security@...nel.org
Subject: Re: KASAN: null-ptr-deref Write in io_file_get_normal

On 8/17/22 12:49 AM, Greg KH wrote:
> On Tue, Aug 16, 2022 at 10:57:39AM -0600, Jens Axboe wrote:
>> On 8/16/22 10:21 AM, Greg KH wrote:
>>> On Wed, Aug 17, 2022 at 12:10:09AM +0800, Jiacheng Xu wrote:
>>>> Hello,
>>>>
>>>> When using modified Syzkaller to fuzz the Linux kernel-5.15.58, the
>>>> following crash was triggered.
>>>
>>> As you sent this to public lists, there's no need to also cc:
>>> security@k.o as there's nothing we can do about this.
>>
>> Indeed...
>>
>>> Also, random syzbot submissions are best sent with a fix for them,
>>> otherwise it might be a while before they will be looked at.
>>
>> Greg, can you cherrypick:
>>
>> commit 386e4fb6962b9f248a80f8870aea0870ca603e89
>> Author: Jens Axboe <axboe@...nel.dk>
>> Date:   Thu Jun 23 11:06:43 2022 -0600
>>
>>     io_uring: use original request task for inflight tracking
>>
>> into 5.15-stable? It should pick cleanly and also fix this issue.
>>
>> -- 
>> Jens Axboe
>>
>>
> 
> Thanks, will do after this next round of releases go out.

Thanks Greg.

-- 
Jens Axboe