linux-kernel - Re: [PATCH 1/2] uio_hv_generic: Fix a memory leak in error handling paths

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Message-ID: <dd8b09a6-ced1-3b96-4422-01219f5bbc7a@wanadoo.fr>
Date:   Tue, 18 May 2021 22:46:19 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Wei Liu <wei.liu@...nel.org>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        decui@...rosoft.com, gregkh@...uxfoundation.org,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/2] uio_hv_generic: Fix a memory leak in error handling
 paths

Le 15/05/2021 à 18:09, Wei Liu a écrit :
> On Tue, May 11, 2021 at 08:18:23PM +0200, Christophe JAILLET wrote:
>> Le 11/05/2021 à 11:52, Wei Liu a écrit :
>>>> Before commit cdfa835c6e5e, the 'vfree' were done unconditionally
>>>> in 'hv_uio_cleanup()'.
>>>> So, another way for fixing the potential leak is to modify
>>>> 'hv_uio_cleanup()' and revert to the previous behavior.
>>>>
>>>
>>> I think this is cleaner.
>>
>> Agreed
> 
> Stephen, ping?
> 
> If I don't hear back from you, I think Christophe should move ahead with
> modifying hv_uio_cleanup.
> 
> Wei.
> 

Hi,
just for your information, it has already been picked by Greg KH (see [1]).
If the cleaner solution is preferred, it will be built on top of this patch.

CJ

[1]: 
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/drivers/uio/uio_hv_generic.c?id=3ee098f96b8b6c1a98f7f97915f8873164e6af9d