From 1f09bfd091eeedbf4ff27e519201ee2c428710c1 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Sat, 25 Jan 2020 10:49:59 +0100
Subject: Fix null pointer deref in is_autolink

Introduced by a recent commit. Found by OSS-Fuzz.
---
 src/commonmark.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/commonmark.c')

diff --git a/src/commonmark.c b/src/commonmark.c
index cc12bb4..cb926c5 100644
--- a/src/commonmark.c
+++ b/src/commonmark.c
@@ -146,7 +146,8 @@ static bool is_autolink(cmark_node *node) {
   if (strcmp((const char *)url, "mailto:") == 0) {
     url += 7;
   }
-  return strcmp((const char *)url, (char *)link_text->data) == 0;
+  return link_text->data != NULL &&
+         strcmp((const char *)url, (char *)link_text->data) == 0;
 }
 
 // if node is a block node, returns node.
-- 
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