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bug#50767: 28.0.50; Warnings about snprintf in image.c on armv7l
From: |
Alan Third |
Subject: |
bug#50767: 28.0.50; Warnings about snprintf in image.c on armv7l |
Date: |
Fri, 15 Oct 2021 18:26:11 +0100 |
On Thu, Oct 14, 2021 at 04:43:05PM +0100, Basil L. Contovounesios wrote:
> Alan Third [2021-10-04 22:45 +0100] wrote:
>
> > On Thu, Sep 23, 2021 at 11:49:37PM +0100, Alan Third wrote:
> >> On Thu, Sep 23, 2021 at 11:38:06PM +0100, Basil L. Contovounesios wrote:
> >> > ...which would mean this only holds in the common case that
> >> > face_font_size has fewer than 5 digits, right?
> >>
> >> Looks that way.
> >>
> >> I suppose in this particular case we could limit the font size to a
> >> maximum of 9999 or something, but surely there's a better way of
> >> calculating string sizes?
> >
> > I've implemented a pretty basic check so we shouldn't accidentally
> > overrun the buffer. See attached.
>
> Thanks, and sorry for the late reply. I haven't had a chance to compile
> this on armv7l yet, but I should be able to later today or tomorrow. It
> continues to compile without warnings on x86_64.
I'm not sure it'll silence the warnings, as I'm not sure what we need
to do for that, but it should at least reduce the chances of an
overflow.
--
Alan Third