linux-kernel - Re: [PATCH] fuse: Put leaked request on error path of fuse

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Message-ID: <5e2fa16d-1408-4c34-1f9d-a6ccfe345358@virtuozzo.com>
Date:   Tue, 6 Nov 2018 12:34:23 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fuse: Put leaked request on error path of fuse_retrieve()

On 06.11.2018 12:33, Miklos Szeredi wrote:
> On Tue, Nov 6, 2018 at 10:25 AM, Kirill Tkhai <ktkhai@...tuozzo.com> wrote:
>> On 06.11.2018 12:23, Miklos Szeredi wrote:
>>> On Tue, Nov 6, 2018 at 10:13 AM, Kirill Tkhai <ktkhai@...tuozzo.com> wrote:
>>>> fuse_request_send_notify_reply() may fail, and this case
>>>> it remains leaked (fuse_retrieve_end(), which is called
>>>> on error path, does not do that). Also, fc->num_waiting,
>>>> will never be decremented, and fuse_wait_aborted() will
>>>> never finish. So, put the request patently.
>>>>
>>>> Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
>>>
>>> Posted same patch yesterday for a syzbot report.   How did you notice this?
>>
>> I've found this by code review. I did this last week and I have 10 patches more
>> on different theme. I was waiting for when the merge window opens.
> 
> Well, the merge window just closed.  But never worry, bugfixes can go
> in at anytime.
> 
> If you notice a bug, such as this, you don't need to hold back until
> any particular time, the sooner it's known, the better.

Ok, no problem :)

Thanks,
Kirill