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]));
     }
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<div class='path'>path: <a href='/guix/log/?id=1fa2b64ded52d589b783477fd2c28611376acafb'>root</a>/<a href='/guix/log/gnu?id=1fa2b64ded52d589b783477fd2c28611376acafb'>gnu</a>/<a href='/guix/log/gnu/services?id=1fa2b64ded52d589b783477fd2c28611376acafb'>services</a>/<a href='/guix/log/gnu/services/dbus.scm?id=1fa2b64ded52d589b783477fd2c28611376acafb'>dbus.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/dbus.scm?id=1fa2b64ded52d589b783477fd2c28611376acafb&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-06-02 20:52:24 +0200'>2024-06-02</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=b9b0f0a995e5341407add3a6ddb038d7967cb69f'>services: dbus: Log to stderr rather than syslog.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-01-07 17:11:02 +0100'>2024-01-07</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=0831c72df618ef15bee719a0a2ccc123fc31837d'>gnu: dbus-service: only symlink /run/dbus the first time</a><span class='msg-avail'>...</span></td><td>Vivien Kraus</td></tr>
<tr><td><span title='2023-10-09 21:51:29 +0200'>2023-10-09</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=6c2a6033b4bd5f74463cb0121e15b9cb4fc5ff6d'>gnu: dbus-service: Make the session bus available under /run/dbus.</a><span class='msg-avail'>...</span></td><td>Vivien Kraus</td></tr>
<tr><td><span title='2023-03-20 18:49:06 +0100'>2023-03-20</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=ccb62d8feb50e2859d7c41429a9e3d9e0fe30bfe'>Merge remote-tracking branch 'origin/master' into core-updates</a></td><td>Andreas Enge</td></tr>
<tr><td><span title='2023-03-03 17:55:35 +0100'>2023-03-03</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=2799ad44234be675f018115f99be98d2c9fd565d'>services: dbus: Deprecate 'dbus-service' procedure.</a><span class='msg-avail'>...</span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2023-03-03 17:55:34 +0100'>2023-03-03</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=ffc5d42fc2589c349579c00e9dd11fabdff2663b'>services: dbus: Deprecate 'polkit-service' procedure.</a><span class='msg-avail'>...</span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2023-01-30 12:39:40 +0200'>2023-01-30</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=4cf1acc7f3033b50b0bf19e02c9f522d522d338c'>Merge remote-tracking branch 'origin/master' into core-updates</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-01-16 15:08:22 +0800'>2023-01-16</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=daa471a7382cc49c1c8ecc0e57a42f1a91b28a6e'>gnu: services: Export polkit-configuration.</a><span class='msg-avail'>...</span></td><td>Zhu Zihao</td></tr>
<tr><td><span title='2022-08-28 21:07:47 -0400'>2022-08-28</span></td><td><a href='/guix/commit/gnu/services/dbus.scm?id=e8f4e1808563eb3c1cd28d419a1f349412af4a0d'>gnu: polkit-mozjs: Rename to polkit and remove obsolete polkit-duktape.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>