Copied from Fedora.

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

diff --git a/extract.c b/extract.c
index a0a4929..9ef80b3 100644
--- a/extract.c
+++ b/extract.c
@@ -2214,6 +2214,7 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
     ulg eb_ucsize;
     uch *eb_ucptr;
     int r;
+    ush method;
 
     if (compr_offset < 4)                /* field is not compressed: */
         return PK_OK;                    /* do nothing and signal OK */
@@ -2223,6 +2224,12 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
          eb_size <= (compr_offset + EB_CMPRHEADLEN)))
         return IZ_EF_TRUNC;               /* no compressed data! */
 
+    method = makeword(eb + (EB_HEADSIZE + compr_offset));
+    if ((method == STORED) && (eb_size != compr_offset + EB_CMPRHEADLEN + eb_ucsize))
+        return PK_ERR;            /* compressed & uncompressed
+                                   * should match in STORED
+                                   * method */
+
     if (
 #ifdef INT_16BIT
         (((ulg)(extent)eb_ucsize) != eb_ucsize) ||
ctive' href='/guix/log/README'>log</a><a href='/guix/tree/README?id=48fe853abc547406daf85eade739bd7ad1108fa7'>tree</a><a href='/guix/commit/README?id=48fe853abc547406daf85eade739bd7ad1108fa7'>commit</a><a href='/guix/diff/README?id=48fe853abc547406daf85eade739bd7ad1108fa7'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/README'>
<input type='hidden' name='id' value='48fe853abc547406daf85eade739bd7ad1108fa7'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=48fe853abc547406daf85eade739bd7ad1108fa7'>root</a>/<a href='/guix/log/README?id=48fe853abc547406daf85eade739bd7ad1108fa7'>README</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/README?id=48fe853abc547406daf85eade739bd7ad1108fa7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-05-20 01:58:04 +0200'>2021-05-20</span></td><td><a href='/guix/commit/README?id=c0087d33705f53cc3619a1a43a33602aaecc3a8b'>The #guix channel is hosted by Libera Chat.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Contact): Update network name.
* ROADMAP: Likewise.
* doc/contributing.texi (Contributing): Likewise.
* doc/guix.texi (After System Installation): Likewise.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-10-23 12:57:20 -0400'>2020-10-23</span></td><td><a href='/guix/commit/README?id=b5aaa3a4fb985d21e21e2a67f48b52f13ebd4728'>doc: Update README.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Installation): Do not mention installing Guix from Git anymore.
(Building from Git): Add section.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-10-22 22:47:54 -0400'>2020-10-22</span></td><td><a href='/guix/commit/README?id=503d2bfde08f9bf97bbf430516d2f19faedd4319'>README: Refer to the manual for building from Git.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Installing Guix from Guix): Remove section.
(Installation): For installing from Git, refer to the "Building from Git"
section of the manual and suggest using './pre-inst-env guix pull' rather than
'make install' for installing Guix.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-06-02 18:55:53 +0200'>2020-06-02</span></td><td><a href='/guix/commit/README?id=c75a80189fc19f6ff8b4c82d1d1801be6763b6d2'>doc: Update README to refer to the manual.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Requirements): Refer to the manual.
(Installation): Update URL of the manual.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-11-09 23:04:14 +0100'>2019-11-09</span></td><td><a href='/guix/commit/README?id=0758a70cc008171f31c848128deca9803536fe60'>doc: Mention value /var to localstatedir option.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Installing Guix from Guix): Mention value /var to localstatedir option.
* doc/contributing.texi (Building from Git): Likewise.
* doc/guix.texi (Requirements): Likewise.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>zimoun</td></tr>
<tr><td><span title='2019-09-04 23:41:07 +0200'>2019-09-04</span></td><td><a href='/guix/commit/README?id=f475c6e53e5b6912cc45663d50f1d03dadfb60b8'>doc: Update 'README'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README: Update intro a bit.
(Installing Guix as non-root): Remove as it's largely outdated.
(Contact): Update.
</span></span>