GNU bug report logs - #58334
29.0.50; ASAN heap use after free in gui_produce_glyphs

Previous Next

Full log

Message #74 received at 58334 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: luangruo <at> yahoo.com, 58334 <at> debbugs.gnu.org
Subject: Re: bug#58334: 29.0.50; ASAN heap use after free in gui_produce_glyphs
Date: Fri, 07 Oct 2022 13:29:38 +0200

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
>> Cc: Po Lu <luangruo <at> yahoo.com>,  58334 <at> debbugs.gnu.org
>> Date: Fri, 07 Oct 2022 10:07:01 +0200
>> 
>> Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:
>> 
>> > Eli Zaretskii <eliz <at> gnu.org> writes:
>> >> IOW, I don't see how block_input anywhere can solve this particular
>> >> problem.
>> >
>> > I wonder too.
>> 
>> And, while vaccuming, I also wondered what happens with the glyph
>> matrices, and maybe other global state?
>
> Fvertical_motion (and other functions that call the move_it_*
> functions) in general don't rely on glyph matrices.  So I'm not sure
> what exactly worries you.

I not yet worried, just wondering :-).

If we don't change some other shared state, then we're safe if we
prevent freeing faces?  That's would be good.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.