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

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Date:   Mon, 13 Mar 2023 18:07:46 -0700
From:   srinivas pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     todd.e.brandt@...ux.intel.com, 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, jic23@...nel.org, jikos@...nel.org,
        p.jungkamp@....net
Subject: Re: [PATCH v2] Fix buffer overrun in HID-SENSOR name string

On Mon, 2023-03-13 at 16:37 -0700, Todd Brandt wrote:
> 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
s parse/parses

> > >  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
Remove "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
> > > 
You don't need the above two lines. You can add

Original-by: Philipp Jungkamp <p.jungkamp@....net>

Before your SOB.

> > > 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
>