linux-kernel - Re: [PATCH v2] Fix buffer overrun in HID-SENSOR name string

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Date:   Mon, 13 Mar 2023 16:37:17 -0700
From:   Todd Brandt <todd.e.brandt@...ux.intel.com>
To:     Andi Shyti <andi.shyti@...nel.org>,
        Todd Brandt <todd.e.brandt@...el.com>
Cc:     linux-input@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org, srinivas.pandruvada@...ux.intel.com,
        jic23@...nel.org, jikos@...nel.org, p.jungkamp@....net
Subject: Re: [PATCH v2] Fix buffer overrun in HID-SENSOR name string

On Tue, 2023-03-14 at 00:07 +0100, Andi Shyti wrote:
> Hi Todd,
> 
> On Mon, Mar 13, 2023 at 03:06:53PM -0700, Todd Brandt wrote:
> > On some platforms there are some platform devices created with
> > invalid names. For example: "HID-SENSOR-INT-020b?.39.auto" instead
> > of "HID-SENSOR-INT-020b.39.auto"
> > 
> > This string include some invalid characters, hence it will fail to
> > properly load the driver which will handle this custom sensor. Also
> > it is a problem for some user space tools, which parse the device
> > names from ftrace and dmesg.
> > 
> > This is because the string, real_usage, is not NULL terminated and
> > printed with %s to form device name.
> > 
> > To address this, we initialize the real_usage string with 0s.
> > 
> > Philipp Jungkamp created this fix, I'm simply submitting it. I've
> > verified it fixes bugzilla issue 217169
> > 
> > Reported-and-tested-by: Todd Brandt <todd.e.brandt@...ux.intel.com>
> > Link: https://bugzilla.kernel.org/show_bug.cgi?id=217169
> > Signed-off-by: Todd Brandt <todd.e.brandt@...el.com>
> 
> Why is not Philip in the SoB list?
> 
Oh, sorry, I got feedback and assumed it needed more work on the
changelog. I also forgot to copy over Phillip's SoB line so this one is
probably worse than the original. The original was just fine, please
ignore this one.

> Anyway the original patch made it to stable, so:
> 
> Fixes: 98c062e82451 ("HID: hid-sensor-custom: Allow more custom iio
> sensors")
> Cc: stable@...r.kernel.org
> 
> and with those you can add:
> 
> Reviewed-by: Andi Shyti <andi.shyti@...nel.org>
> 
> Andi