linux-kernel - Re: [PATCH v3 1/4] NFC: st21nfca: Fix out of bounds kernel access when handling ATR

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Date:   Sat, 9 Jun 2018 11:51:46 +0200
From:   Samuel Ortiz <sameo@...ux.intel.com>
To:     Amit Pundir <amit.pundir@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        linux-wireless@...r.kernel.org,
        Suren Baghdasaryan <surenb@...gle.com>,
        Christophe Ricard <christophe.ricard@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        John Stultz <john.stultz@...aro.org>,
        Dmitry Shmidt <dimitrysh@...gle.com>,
        Todd Kjos <tkjos@...gle.com>,
        Android Kernel Team <kernel-team@...roid.com>,
        Stable <stable@...r.kernel.org>
Subject: Re: [PATCH v3 1/4] NFC: st21nfca: Fix out of bounds kernel access
 when handling ATR_REQ

Hi Amit,

On Fri, May 04, 2018 at 12:08:53AM +0530, Amit Pundir wrote:
> From: Suren Baghdasaryan <surenb@...gle.com>
> 
> Out of bounds kernel accesses in st21nfca's NFC HCI layer
> might happen when handling ATR_REQ events if user-specified
> atr_req->length is bigger than the buffer size. In
> that case memcpy() inside st21nfca_tm_send_atr_res() will
> read extra bytes resulting in OOB read from the kernel heap.
> 
> cc: Stable <stable@...r.kernel.org>
> Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
> Signed-off-by: Amit Pundir <amit.pundir@...aro.org>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
> v3..v1:
> Resend. No changes.
> 
>  drivers/nfc/st21nfca/dep.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
All 4 patches applied to nfc-next, thanks.

Cheers,
Samuel.