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

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Message-ID: <YvyPe7cKY2sLzbJt@kroah.com>
Date:   Wed, 17 Aug 2022 08:49:31 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Jens Axboe <axboe@...nel.dk>
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 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.

greg k-h