From 70b21c9f2a31b3ecfe8aa624c01da3ebba9e06c8 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Sun, 26 Feb 2023 14:33:16 +0100
Subject: [PATCH] malloc-fail: Fix null deref in xmlXPathCompiledEvalInternal

Found with libFuzzer, see #344.

Reference:https://github.com/GNOME/libxml2/commit/70b21c9f2a31b3ecfe8aa624c01da3ebba9e06c8
Conflict:NA
---
 xpath.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xpath.c b/xpath.c
index d63bdd7..54d9c58 100644
--- a/xpath.c
+++ b/xpath.c
@@ -14370,6 +14370,8 @@ xmlXPathCompiledEvalInternal(xmlXPathCompExprPtr comp,
     }
 #endif
     pctxt = xmlXPathCompParserContext(comp, ctxt);
+    if (pctxt == NULL)
+        return(-1);
     res = xmlXPathRunEval(pctxt, toBool);
 
     if (pctxt->error != XPATH_EXPRESSION_OK) {
-- 
2.27.0

