From 38386bd482c0a8102a79958cb3eddcb97a167ca3 Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Fri, 9 Mar 2018 17:39:40 +1100
Subject: [PATCH] CVE-2017-8842 Fix divide-by-zero in bufRead::get

---
 libzpaq/libzpaq.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libzpaq/libzpaq.h b/libzpaq/libzpaq.h
index 93387da..cbe211d 100644
--- a/libzpaq/libzpaq.h
+++ b/libzpaq/libzpaq.h
@@ -465,7 +465,8 @@ struct bufRead: public libzpaq::Reader {
 
 	int get() {
 		if (progress && !(*s_len % 128)) {
-			int pct = (total_len - *s_len) * 100 / total_len;
+			int pct = (total_len > 0) ?
+				(total_len - *s_len) * 100 / total_len : 100;
 
 			if (pct / 10 != *last_pct / 10) {
 				int i;
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<div class='path'>path: <a href='/guix/log/?id=265e1858fb730bdc57c2059127109520bb2fc3cb&amp;showmsg=1'>root</a>/<a href='/guix/log/doc?id=265e1858fb730bdc57c2059127109520bb2fc3cb&amp;showmsg=1'>doc</a>/<a href='/guix/log/doc/htmlxref.cnf?id=265e1858fb730bdc57c2059127109520bb2fc3cb&amp;showmsg=1'>htmlxref.cnf</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/doc/htmlxref.cnf?id=265e1858fb730bdc57c2059127109520bb2fc3cb'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2020-01-12 00:19:10 +0100'>2020-01-12</span></td><td class='logsubject'><a href='/guix/commit/doc/htmlxref.cnf?id=30d83f445b70ebce7f01eaa91c8f418ff0a98321'>doc: Update htmlxref.cnf.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* doc/htmlxref.cnf: Update from Texinfo.  Add entries for "mes",
"guix.ru", and "guix.zh_CN".


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<tr class='logheader'><td><span title='2019-05-04 23:07:38 +0200'>2019-05-04</span></td><td class='logsubject'><a href='/guix/commit/doc/htmlxref.cnf?id=e8f8363cdebb24dc359cadba7ae0a689fb21fb99'>doc: Update htmlxref.cnf.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* doc/htmlxref.cnf (G): Switch to https.
(geiser, guix.de, guix.es, hurd): New entries.


</td></tr>
<tr class='logheader'><td><span title='2018-07-05 22:16:10 +0200'>2018-07-05</span></td><td class='logsubject'><a href='/guix/commit/doc/htmlxref.cnf?id=c35f77c5a07690fc9d369ed4b751a5a9e5de6cf1'>doc: Update URL of the Emacs-Guix manual.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* doc/htmlxref.cnf (EMACS_GUIX): Update URL.


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<tr class='logheader'><td><span title='2018-07-05 22:13:23 +0200'>2018-07-05</span></td><td class='logsubject'><a href='/guix/commit/doc/htmlxref.cnf?id=56b4dabc2ba3446ff212e0d4d9e2df15fc25e88f'>doc: Mention translations of the manual.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* doc/guix.texi (Top): Add note about l10n.
* doc/htmlxref.cnf: Add "guix.fr".


</td></tr>
<tr class='logheader'><td><span title='2017-05-30 18:30:39 +0300'>2017-05-30</span></td><td class='logsubject'><a href='/guix/commit/doc/htmlxref.cnf?id=f753c2829913a9bb61dc266f4b1db8275e34a461'>doc: htmlxref: Fix link to Emacs-Guix manual.</a></td><td>Alex Kost</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
Reported-by: Ludovic Courtès &lt;ludo@gnu.org&gt;

This fixes a regression introduced by commit
8ca0c88a894c685b624757e38ee7663534f03460.

* doc/htmlxref.cnf (EMACS_GUIX): Fix the link to 'html_node'.


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<tr class='logheader'><td><span title='2017-05-04 22:45:53 +0300'>2017-05-04</span></td><td class='logsubject'><a href='/guix/commit/doc/htmlxref.cnf?id=8ca0c88a894c685b624757e38ee7663534f03460'>doc: Add references to Emacs-Guix manual.</a></td><td>Alex Kost</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* doc/htmlxref.cnf: Add links to the real manual.
* doc/contributing.texi (Formatting Code): Add reference to it.
* doc/guix.texi (Package Management): Likewise.


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