GNU bug report logs - #2370
23.0.90; decode-coding-region make emacs crash

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From: Kenichi Handa <handa <at> m17n.org>
To: Chong Yidong <cyd <at> stupidchicken.com>
Cc: h-fujishima <at> sakura.ad.jp, 2370 <at> debbugs.gnu.org
Subject: bug#2370: 23.0.90; decode-coding-region make emacs crash
Date: Thu, 19 Feb 2009 12:56:42 +0900

In article <87d4dfqg5h.fsf <at> cyd.mit.edu>, Chong Yidong <cyd <at> stupidchicken.com> writes:

> Kenichi Handa <handa <at> m17n.org> writes:
> > I found two bugs related to this problem, and just installed
> > a fix for one of them.  Now the above specific problem
> > should be fixed.  I'll keep on workning to fix the other bug
> > to make the decoding more robust.

> Thanks.  I think decode_coding should also verify the size of the
> unprocessed bytes before writing them to coding->carrover.  This way,
> future bugs of this sort will not cause memory corruption (which might
> be a security concern).  What's your opinion?

Yes.  I'm going to add such a check.

But it doesn't solve the underlying problem of handling too
long (and wrong) composition sequence in iso-2022 decoding.
Solving it requires a little bit more time.

---
Kenichi Handa
handa <at> m17n.org

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