linux-kernel - Re: [PATCH] drm/nouveau/secboot/acr: fix memory leak

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Message-ID: <CAGXu5jKd5SEabmr4sCW-=Oksi6WvO11tDB_9Un1fRYQAoq2h0w@mail.gmail.com>
Date:   Thu, 13 Sep 2018 14:35:02 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Ben Skeggs <bskeggs@...hat.com>
Cc:     John Hubbard <jhubbard@...dia.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        David Airlie <airlied@...ux.ie>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        nouveau <nouveau@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/nouveau/secboot/acr: fix memory leak

On Fri, Sep 7, 2018 at 8:02 PM, John Hubbard <jhubbard@...dia.com> wrote:
> On 8/2/18 12:51 PM, Gustavo A. R. Silva wrote:
>> Hi all,
>>
>> Friendly ping! Who can take this?
>>
>> Thanks
>> --
>> Gustavo
>>
>> On 07/24/2018 08:27 AM, Gustavo A. R. Silva wrote:
>>> In case memory resources for *bl_desc* were allocated, release
>>> them before return.
>>>
>>> Addresses-Coverity-ID: 1472021 ("Resource leak")
>>> Fixes: 0d466901552a ("drm/nouveau/secboot/acr: Remove VLA usage")
>>> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
>>> ---
>>>  drivers/gpu/drm/nouveau/nvkm/subdev/secboot/acr_r352.c | 1 +
>>>  1 file changed, 1 insertion(+)
>>>
>>> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/acr_r352.c b/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/acr_r352.c
>>> index d02e183..5c14d6a 100644
>>> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/acr_r352.c
>>> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/acr_r352.c
>>> @@ -801,6 +801,7 @@ acr_r352_load(struct nvkm_acr *_acr, struct nvkm_falcon *falcon,
>>>              bl = acr->hsbl_unload_blob;
>>>      } else {
>>>              nvkm_error(_acr->subdev, "invalid secure boot blob!\n");
>>> +            kfree(bl_desc);
>>>              return -EINVAL;
>>>      }
>>>
>>>
>
> Hi Gustavo,
>
> Seeing as how I've been working on this corner of Nouveau lately (don't ask, haha),
> I reviewed and also tested this. It looks good, you can add:
>
> Reviewed-by: John Hubbard <jhubbard@...dia.com>

Ben can you take this?

Reviewed-by: Kees Cook <keescook@...omium.org>

-Kees

-- 
Kees Cook
Pixel Security