Extracted from a patch in Fedora.

http://pkgs.fedoraproject.org/cgit/unzip.git/tree/unzip-6.0-heap-overflow-infloop.patch?id=d18f821e

From bd150334fb4084f5555a6be26b015a0671cb5b74 Mon Sep 17 00:00:00 2001
From: Kamil Dudka <kdudka@redhat.com>
Date: Tue, 22 Sep 2015 18:52:23 +0200
Subject: [PATCH 3/3] extract: prevent unsigned overflow on invalid input

Suggested-by: Stefan Cornelius
---
 extract.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/extract.c b/extract.c
index 29db027..b9ae667 100644
--- a/extract.c
+++ b/extract.c
@@ -1257,8 +1257,17 @@ static int extract_or_test_entrylist(__G__ numchunk,
         if (G.lrec.compression_method == STORED) {
             zusz_t csiz_decrypted = G.lrec.csize;
 
-            if (G.pInfo->encrypted)
+            if (G.pInfo->encrypted) {
+                if (csiz_decrypted <= 12) {
+                    /* handle the error now to prevent unsigned overflow */
+                    Info(slide, 0x401, ((char *)slide,
+                      LoadFarStringSmall(ErrUnzipNoFile),
+                      LoadFarString(InvalidComprData),
+                      LoadFarStringSmall2(Inflate)));
+                    return PK_ERR;
+                }
                 csiz_decrypted -= 12;
+            }
             if (G.lrec.ucsize != csiz_decrypted) {
                 Info(slide, 0x401, ((char *)slide,
                   LoadFarStringSmall2(WrnStorUCSizCSizDiff),
-- 
2.5.2

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<div class='path'>path: <a href='/guix/log/?id=e9119ac1d89e78ca45ee93d28e17de2c5d901557'>root</a>/<a href='/guix/log/scripts?id=e9119ac1d89e78ca45ee93d28e17de2c5d901557'>scripts</a>/<a href='/guix/log/scripts/guix.in?id=e9119ac1d89e78ca45ee93d28e17de2c5d901557'>guix.in</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/scripts/guix.in?id=e9119ac1d89e78ca45ee93d28e17de2c5d901557&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-06-09 12:02:27 +0200'>2018-06-09</span></td><td><a href='/guix/commit/scripts/guix.in?id=75e24d7b0e19ab2164aecb340e82d07d2b9714e7'>pull: Install the new Guix in a profile.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-28 23:14:55 +0100'>2018-01-28</span></td><td><a href='/guix/commit/scripts/guix.in?id=63666a348af5ef5190cbe9611c40f2b9188b7967'>guix: Let Emacs detect “scripts/guix.in” appropriate mode.</a><span class='msg-avail'>...</span></td><td>Mathieu Lirzin</td></tr>
<tr><td><span title='2018-01-23 15:01:15 +0100'>2018-01-23</span></td><td><a href='/guix/commit/scripts/guix.in?id=6f774d481839f87178c5895ac2d661e141f879b8'>guix: Refactor script.</a><span class='msg-avail'>...</span></td><td>Mathieu Lirzin</td></tr>
<tr><td><span title='2018-01-23 10:13:16 +0100'>2018-01-23</span></td><td><a href='/guix/commit/scripts/guix.in?id=cba386c1295b7054df22dfb4662b1b92f668e2c0'>build: Expand ‘scripts/guix’ at Make time.</a><span class='msg-avail'>...</span></td><td>Mathieu Lirzin</td></tr>
<tr><td><span title='2017-03-20 23:26:18 +0100'>2017-03-20</span></td><td><a href='/guix/commit/scripts/guix.in?id=9437fd7399425ed281e1bfc13240288ba9078caa'>build: Install .go files to $libdir/guile/X.Y.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-04-06 23:21:26 +0200'>2016-04-06</span></td><td><a href='/guix/commit/scripts/guix.in?id=7cffaeb60473e25a7ef8c1a8cb36e1531191873a'>challenge: Really exit with non-zero upon hash mismatch.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2014-06-14 22:55:59 +0200'>2014-06-14</span></td><td><a href='/guix/commit/scripts/guix.in?id=243cea2461e3f260cef2c702689252a54858fdfc'>guix: Look for "guix-packages" messages in $localedir.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2013-10-12 22:29:31 +0200'>2013-10-12</span></td><td><a href='/guix/commit/scripts/guix.in?id=39e9f95d059e61a735a52f866d4c175906826744'>guix: Add missing call to 'bindtextdomain'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2013-09-27 00:46:17 +0200'>2013-09-27</span></td><td><a href='/guix/commit/scripts/guix.in?id=dadee6cd6e775741d85e8b968e7f1ce3123385a4'>Run 'guix' with '--no-auto-compile'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>