linux-kernel - Re: [2/2] zd1211rw: fix NULL-deref at probe

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Message-ID: <20170322132459.GD10130@localhost>
Date:   Wed, 22 Mar 2017 14:24:59 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Kalle Valo <kvalo@...eaurora.org>
Cc:     Johan Hovold <johan@...nel.org>,
        QCA ath9k Development <ath9k-devel@....qualcomm.com>,
        Daniel Drake <dsd@...too.org>,
        Ulrich Kunitz <kune@...ne-taler.de>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [2/2] zd1211rw: fix NULL-deref at probe

On Wed, Mar 22, 2017 at 03:02:12PM +0200, Kalle Valo wrote:
> Johan Hovold <johan@...nel.org> writes:
> 
> > On Wed, Mar 22, 2017 at 09:04:15AM +0000, Kalle Valo wrote:
> >> Johan Hovold <johan@...nel.org> wrote:
> >> > Make sure to check the number of endpoints to avoid dereferencing a
> >> > NULL-pointer or accessing memory beyond the endpoint array should a
> >> > malicious device lack the expected endpoints.
> >> > 
> >> > Fixes: a1030e92c150 ("[PATCH] zd1211rw: Convert installer CDROM
> >> > device into WLAN device")
> >> > Cc: Daniel Drake <dsd@...too.org>
> >> > Signed-off-by: Johan Hovold <johan@...nel.org>
> >> 
> >> Patch applied to wireless-drivers-next.git, thanks.
> >> 
> >> ca260ece6a57 zd1211rw: fix NULL-deref at probe
> >
> > What about patch 1/2 which fixes the same bug (literally copied from the
> > zd1211rw driver)?
> 
> I will apply that to my separate ath.git tree, just didn't get to your
> patch yet.

Ah, ok. 

> > And as these fixes should be backported to stable (I left out the tag
> > for networking drivers)
> 
> Actually for wireless drivers you should add the stable tag.

Alright, will do in the future.

> > why only apply to -next?
> 
> I didn't see that the fix was important enough for 4.11.

Ok, but fixes for these types of crashes that can be triggered by a
malicious device have typically gone into the current -rc (a couple just
went in through the net tree for example).

Thanks,
Johan