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) ||
guix/'>summary</a><a href='/guix/refs/?id=67960be52e01f8bd169dcff5985c4af2c5f87f91'>refs</a><a class='active' href='/guix/log/gnu/installer/substitutes.scm?showmsg=1'>log</a><a href='/guix/tree/gnu/installer/substitutes.scm?id=67960be52e01f8bd169dcff5985c4af2c5f87f91'>tree</a><a href='/guix/commit/gnu/installer/substitutes.scm?id=67960be52e01f8bd169dcff5985c4af2c5f87f91'>commit</a><a href='/guix/diff/gnu/installer/substitutes.scm?id=67960be52e01f8bd169dcff5985c4af2c5f87f91'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/installer/substitutes.scm'>
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<div class='path'>path: <a href='/guix/log/?id=67960be52e01f8bd169dcff5985c4af2c5f87f91&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=67960be52e01f8bd169dcff5985c4af2c5f87f91&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/installer?id=67960be52e01f8bd169dcff5985c4af2c5f87f91&amp;showmsg=1'>installer</a>/<a href='/guix/log/gnu/installer/substitutes.scm?id=67960be52e01f8bd169dcff5985c4af2c5f87f91&amp;showmsg=1'>substitutes.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/installer/substitutes.scm?id=67960be52e01f8bd169dcff5985c4af2c5f87f91'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2020-12-11 21:37:07 +0100'>2020-12-11</span></td><td class='logsubject'><a href='/guix/commit/gnu/installer/substitutes.scm?id=8361817bf693742757b096468198626f297bb09e'>install: Discover local substitute servers.</a></td><td>Mathieu Othacehe</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/installer/substitutes.scm: New file.
* gnu/installer/newt/substitutes.scm: New file.
* gnu/local.mk (INSTALLER_MODULES): Add them.
* po/guix/POTFILES.in: Add gnu/installer/newt/substitutes.scm.
* gnu/installer/proxy.scm (with-silent-shepherd): Move to ...
* gnu/installer/utils.scm: ... here.
* gnu/installer/record.scm (&lt;installer&gt;)[substitutes-page]: New field.
* gnu/installer/newt.scm (substitutes-page): New procedure,
(newt-installer): register it.
* gnu/installer.scm (installer-steps): Add "substitutes-page" step.
* gnu/system/install.scm (%installation-services): Add avahi-service-type and
enable substitute server discover in guix-service-type.
[&lt;name-service-switch&gt;]: Set it to %mdns-host-lookup-nss.


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