Copied from Debian.

From: Petr Stodulka <pstodulk@redhat.com>
Date: Mon, 14 Sep 2015 18:23:17 +0200
Subject: Upstream fix for heap overflow
Bug-Debian: https://bugs.debian.org/802162
Bug-RedHat: https://bugzilla.redhat.com/show_bug.cgi?id=1260944
Origin: https://bugzilla.redhat.com/attachment.cgi?id=1073002
Forwarded: yes

---
 crypt.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

--- a/crypt.c
+++ b/crypt.c
@@ -465,7 +465,17 @@
     GLOBAL(pInfo->encrypted) = FALSE;
     defer_leftover_input(__G);
     for (n = 0; n < RAND_HEAD_LEN; n++) {
-        b = NEXTBYTE;
+        /* 2012-11-23 SMS.  (OUSPG report.)
+         * Quit early if compressed size < HEAD_LEN.  The resulting
+         * error message ("unable to get password") could be improved,
+         * but it's better than trying to read nonexistent data, and
+         * then continuing with a negative G.csize.  (See
+         * fileio.c:readbyte()).
+         */
+        if ((b = NEXTBYTE) == (ush)EOF)
+        {
+            return PK_ERR;
+        }
         h[n] = (uch)b;
         Trace((stdout, " (%02x)", h[n]));
     }
768f7c393cda49302ba2e8705f14ae56f0d'>refs</a><a class='active' href='/guix/log/gnu/packages/cmake.scm'>log</a><a href='/guix/tree/gnu/packages/cmake.scm?id=13425768f7c393cda49302ba2e8705f14ae56f0d'>tree</a><a href='/guix/commit/gnu/packages/cmake.scm?id=13425768f7c393cda49302ba2e8705f14ae56f0d'>commit</a><a href='/guix/diff/gnu/packages/cmake.scm?id=13425768f7c393cda49302ba2e8705f14ae56f0d'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/cmake.scm'>
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<div class='path'>path: <a href='/guix/log/?id=13425768f7c393cda49302ba2e8705f14ae56f0d'>root</a>/<a href='/guix/log/gnu?id=13425768f7c393cda49302ba2e8705f14ae56f0d'>gnu</a>/<a href='/guix/log/gnu/packages?id=13425768f7c393cda49302ba2e8705f14ae56f0d'>packages</a>/<a href='/guix/log/gnu/packages/cmake.scm?id=13425768f7c393cda49302ba2e8705f14ae56f0d'>cmake.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/packages/cmake.scm?id=13425768f7c393cda49302ba2e8705f14ae56f0d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-07-20 10:11:35 +0200'>2023-07-20</span></td><td><a href='/guix/commit/gnu/packages/cmake.scm?id=6f15b4204fb2205c1b6cae81d396b2a95bdd818e'>gnu: cmake-minimal: Skip tests on the Hurd.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cmake.scm (cmake-minimal)[arguments]: When building natively on
the Hurd, add %common-disabled-tests/hurd to skipped tests in phase 'check'.
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-07-20 10:11:35 +0200'>2023-07-20</span></td><td><a href='/guix/commit/gnu/packages/cmake.scm?id=07eff96a86670a693c1f9a5df52e5fc0062d4c78'>gnu: cmake-bootstrap: Fix build for the Hurd.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cmake.scm (%common-disabled-tests/hurd): New variable.
(cmake-bootstrap) [inputs]: Include libuv for the Hurd too.
[arguments]: Add %common-disabled-tests/hurd to #:make-flags for the Hurd.
Also add a 'patch-hurd' phase to fix the build.
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-06-17 14:38:32 +0200'>2023-06-17</span></td><td><a href='/guix/commit/gnu/packages/cmake.scm?id=ff690faf66d8f37ee6b679fcb7cf37e369624ee3'>gnu: Use target-hurd?, system-hurd? instead of hurd-target?, hurd-system?.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/hurd.scm (hurd-target?): Remove.
(hurd-system?): Move to...
* guix/utils.scm (system-hurd?): ...here.
* gnu/packages/*: Update all users, removing (gnu packages hurd) include where
now unused.
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-03-02 10:55:08 +0000'>2023-03-02</span></td><td><a href='/guix/commit/gnu/packages/cmake.scm?id=7df09ee0ab3e7962ef27859ce87e06a323059284'>Merge remote-tracking branch 'savannah/master' into core-updates</a><span class='msg-avail'>...<span class='msg-tooltip'>Conflicts:
	gnu/local.mk
	gnu/packages/autotools.scm
	gnu/packages/cmake.scm
	gnu/packages/gnuzilla.scm
	gnu/packages/haskell.scm
	gnu/packages/pdf.scm
	gnu/packages/python-xyz.scm
	gnu/packages/samba.scm
	gnu/packages/tex.scm
	gnu/packages/tls.scm
	gnu/packages/wxwidgets.scm
</span></span></td><td>Christopher Baines</td></tr>