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Re: [PATCH V2 1/3] brcmfmac: Avoid possible out-of-bounds read

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Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx> writes:

> On 9/12/2017 7:48 AM, Kalle Valo wrote:
>> Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx> writes:
>>
>>> On 09-09-17 21:30, Kevin Cernekee wrote:
>>>> In brcmf_p2p_notify_rx_mgmt_p2p_probereq(), chanspec is assigned before
>>>> the length of rxframe is validated.  This could lead to uninitialized
>>>> data being accessed (but not printed).  Since we already have a
>>>> perfectly good endian-swapped copy of rxframe->chanspec in ch.chspec,
>>>> and ch.chspec is not modified by decchspec(), avoid the extra
>>>> assignment and use ch.chspec in the debug print.
>>>>
>>>> Suggested-by: Mattias Nissler <mnissler@xxxxxxxxxxxx>
>>>> Signed-off-by: Kevin Cernekee <cernekee@xxxxxxxxxxxx>
>>>> Reviewed-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
>>>> ---
>>>>    drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c | 3 +--
>>>>    1 file changed, 1 insertion(+), 2 deletions(-)
>>>>
>>>>
>>>> V1->V2: Clarify changelog re: whether the uninitialized data is printed.
>>>
>>> This patch and the others in this series look fine to me.
>>
>> Should these go to v4.14?
>
> I have no strong opinion. These are certainly improvements, but it
> does not seem an -rc fix to me. Within this series I would say patch
> 3/3 adds an additional sanity check in the event processing against an
> attack so you may consider adding just that one to v4.14

Ok, I'll queue patch 3 to v4.14.

> and tag it for stable, ie.:
>
> Cc: stable@xxxxxxxxxxxxxxx # v3.8.x

But why v3.8.x? I admit that I haven't fully figured out the stable tags
yet, but doesn't that mean that it will be only applied to v3.8.x and
nothing else? I was expecting it to be:

Cc: stable@xxxxxxxxxxxxxxx # v3.8+

-- 
Kalle Valo



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