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]));
     }
b6d058ce134b8f0693e7d87c5612757c572db5e'>refs</a><a class='active' href='/guix/log/gnu/packages/openpgp.scm'>log</a><a href='/guix/tree/gnu/packages/openpgp.scm?id=9b6d058ce134b8f0693e7d87c5612757c572db5e'>tree</a><a href='/guix/commit/gnu/packages/openpgp.scm?id=9b6d058ce134b8f0693e7d87c5612757c572db5e'>commit</a><a href='/guix/diff/gnu/packages/openpgp.scm?id=9b6d058ce134b8f0693e7d87c5612757c572db5e'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/openpgp.scm'>
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<tr><td><span title='2023-03-13 15:08:34 +0100'>2023-03-13</span></td><td><a href='/guix/commit/gnu/packages/openpgp.scm?id=3e7dc94a140e8a230e91af5e57370932457e0946'>gnu: rnp: Improve package style.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/package/openpgp.scm (rnp)[phases]{fixes}: Rename fixes to patch-tests, use
search-input-file, and remove trailing #t.
{check}: Respect tests?.
[native-inputs]: Remove labels.
[home-page]: Update URL.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Jack Hill</td></tr>
<tr><td><span title='2023-03-13 15:08:33 +0100'>2023-03-13</span></td><td><a href='/guix/commit/gnu/packages/openpgp.scm?id=bc65415fb1fe998a873747ca8c5ae1f795ae71d3'>gnu: rnp: Update to 0.16.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/openpgp.scm (rnp): Update to 0.16.2.
[file-name]: Use git-file-name.
[patches]: Remove.
[arguments]: Disable downloading testing inputs in #:configure-flags.
[phases]{fixes}: Remove functionality that is no longer needed.
[native-inputs]: Replace googletest-source with googletest, remove
python2.
* gnu/packages/patches/rnp-add-version.cmake.patch,
* gnu/packages/patches/rnp-disable-ruby-rnp-tests.patch,
* gnu/packages/patches/rnp-unbundle-googletest.patch: Remove files.
* gnu/local.mk (dist_patch_DATA): Remove them.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Jack Hill</td></tr>