2022-08-16 16:52:45

by Greg Kroah-Hartman

[permalink] [raw]
Subject: Re: KASAN: null-ptr-deref Write in io_file_get_normal

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:
[email protected] as there's nothing we can do about this.

Also, random syzbot submissions are best sent with a fix for them,
otherwise it might be a while before they will be looked at.

good luck!

greg k-h


2022-08-16 17:28:12

by Jens Axboe

[permalink] [raw]
Subject: Re: KASAN: null-ptr-deref Write in io_file_get_normal

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:
> [email protected] 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 <[email protected]>
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


2022-08-17 06:57:50

by Greg Kroah-Hartman

[permalink] [raw]
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:
> > [email protected] 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 <[email protected]>
> 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

2022-08-17 14:25:10

by Jens Axboe

[permalink] [raw]
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:
>>> [email protected] 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 <[email protected]>
>> 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