https://github.com/libexpat/libexpat/commit/9bf0f2c16ee86f644dd1432507edff94c08dc232.patch
Fixed in 2.6.3.

From 9bf0f2c16ee86f644dd1432507edff94c08dc232 Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Mon, 19 Aug 2024 22:37:16 +0200
Subject: [PATCH] lib: Detect integer overflow in function nextScaffoldPart

Reported by TaiYou
---
 expat/lib/xmlparse.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/xmlparse.c b/lib/xmlparse.c
index 91682c188..f737575ea 100644
--- a/lib/xmlparse.c
+++ b/lib/xmlparse.c
@@ -7558,6 +7558,15 @@ nextScaffoldPart(XML_Parser parser) {
   int next;
 
   if (! dtd->scaffIndex) {
+    /* Detect and prevent integer overflow.
+     * The preprocessor guard addresses the "always false" warning
+     * from -Wtype-limits on platforms where
+     * sizeof(unsigned int) < sizeof(size_t), e.g. on x86_64. */
+#if UINT_MAX >= SIZE_MAX
+    if (parser->m_groupSize > ((size_t)(-1) / sizeof(int))) {
+      return -1;
+    }
+#endif
     dtd->scaffIndex = (int *)MALLOC(parser, parser->m_groupSize * sizeof(int));
     if (! dtd->scaffIndex)
       return -1;
1fa6aaa01693bc2ff9a280731b'>refs</a><a class='active' href='/guix/log/etc/openrc/guix-daemon.in'>log</a><a href='/guix/tree/etc/openrc/guix-daemon.in?id=ddd0cf3828ec5e1fa6aaa01693bc2ff9a280731b'>tree</a><a href='/guix/commit/etc/openrc/guix-daemon.in?id=ddd0cf3828ec5e1fa6aaa01693bc2ff9a280731b'>commit</a><a href='/guix/diff/etc/openrc/guix-daemon.in?id=ddd0cf3828ec5e1fa6aaa01693bc2ff9a280731b'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/openrc/guix-daemon.in'>
<input type='hidden' name='id' value='ddd0cf3828ec5e1fa6aaa01693bc2ff9a280731b'/><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=ddd0cf3828ec5e1fa6aaa01693bc2ff9a280731b'>root</a>/<a href='/guix/log/etc?id=ddd0cf3828ec5e1fa6aaa01693bc2ff9a280731b'>etc</a>/<a href='/guix/log/etc/openrc?id=ddd0cf3828ec5e1fa6aaa01693bc2ff9a280731b'>openrc</a>/<a href='/guix/log/etc/openrc/guix-daemon.in?id=ddd0cf3828ec5e1fa6aaa01693bc2ff9a280731b'>guix-daemon.in</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/etc/openrc/guix-daemon.in?id=ddd0cf3828ec5e1fa6aaa01693bc2ff9a280731b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-07-07 23:54:20 -0400'>2021-07-07</span></td><td><a href='/guix/commit/etc/openrc/guix-daemon.in?id=4cbe0127a668cbcc64087c5d311308b59d39b104'>guix-install.sh: Prompt for configuring substitutes discovery.</a><span class='msg-avail'>...<span class='msg-tooltip'>Also ensure prompt_yes_no always print the message with a trailing space,
which is more pleasing to the eye.

* etc/guix-daemon.conf.in &lt;--discover=no&gt;: New guix-daemon option.
* etc/guix-daemon.service.in: Likewise.
* etc/init.d/guix-daemon.in: Likewise.
* etc/openrc/guix-daemon.in: Likewise.
* etc/guix-install.sh (configure_substitute_discovery): New procedure.
(sys_enable_guix_daemon): Ask the user whether automatic substitute discovery
should be enabled.  Set the '--discover' argument accordingly.
(prompt_yes_no): Add a trailing space to the message.
(sys_authorize_build_farms): Remove trailing space from the message argument.
* NEWS (Distribution): Add news.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-09-17 14:10:42 +0200'>2020-09-17</span></td><td><a href='/guix/commit/etc/openrc/guix-daemon.in?id=cabac732deffafc796537658a6c33c6c4aec821e'>guix-install.sh: Support OpenRC.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-install.sh (chk_init_sys): Detect OpenRC.
(sys_enable_guix_daemon): Install &amp; enable the Guix daemon on such
systems.
* etc/openrc/guix-daemon.in: New file.
* nix/local.mk: Add a rule for it.
(openrcservicedir, nodist_openrcservice_DATA): New variables.
(CLEANFILES, EXTRA_DIST): Add them.
* .gitignore: Ignore etc/openrc/guix-daemon.

Signed-off-by: Tobias Geerinckx-Rice &lt;me@tobias.gr&gt;
</span></span></td><td>Morgan Smith</td></tr>