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=d85130037d1244930bea6827cb7842be890a4d0f'>root</a>/<a href='/guix/log/gnu?id=d85130037d1244930bea6827cb7842be890a4d0f'>gnu</a>/<a href='/guix/log/gnu/services?id=d85130037d1244930bea6827cb7842be890a4d0f'>services</a>/<a href='/guix/log/gnu/services/virtualization.scm?id=d85130037d1244930bea6827cb7842be890a4d0f'>virtualization.scm</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/gnu/services/virtualization.scm?id=d85130037d1244930bea6827cb7842be890a4d0f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-07-14 13:19:37 +0200'>2018-07-14</span></td><td><a href='/guix/commit/gnu/services/virtualization.scm?id=daf823ad27d2db8a392c269cfe7940ad8cb1f4c1'>gnu: services: Export virtlog-configuration.</a><span class='msg-avail'>...</span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2018-01-11 14:42:31 +0100'>2018-01-11</span></td><td><a href='/guix/commit/gnu/services/virtualization.scm?id=71b98b9de9d2658f4787d2fb77609a95b09ff3ea'>services: qemu-binfmt: Extend guix-daemon with extra chroot directories.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-11 14:29:49 +0100'>2018-01-11</span></td><td><a href='/guix/commit/gnu/services/virtualization.scm?id=6738c29fbfa754c0e787ccfd20e47476cd161f98'>services: Add qemu-binfmt.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-08-23 12:47:24 +0100'>2017-08-23</span></td><td><a href='/guix/commit/gnu/services/virtualization.scm?id=e6051057ab926daa19a00a2d8dbd678ecb9be95c'>services: Add libvirt services</a><span class='msg-avail'>...</span></td><td>Ryan Moe</td></tr>