From: Nick Clifton <nickc@redhat.com>
Date: Mon, 9 Oct 2023 16:52:39 +0000 (+0100)
Subject: Fix: Null pointer dereference in ldlex.l
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1b334e27f8410c7fbe3417023258eb9e03ec9592;p=binutils-gdb.git

Fix: Null pointer dereference in ldlex.l

  PR 30951
  * ldlex.l (yy_input): Check for YY_CURRENT_BUFFER being NULL.
---

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 8423dd4ac29..05b88ee0b94 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,5 +1,8 @@
 2023-10-09  Nick Clifton  <nickc@redhat.com>
 
+	PR 30951
+	* ldlex.l (yy_input): Check for YY_CURRENT_BUFFER being NULL.
+
 	PR 30954
 	* ldlang.c (map_input_to_output_sections): Check that os is non
 	NULL before using it.
diff --git a/ld/ldlex.l b/ld/ldlex.l
index 435172c08c3..94b2ea70acd 100644
--- a/ld/ldlex.l
+++ b/ld/ldlex.l
@@ -668,7 +668,7 @@ static int
 yy_input (char *buf, int max_size)
 {
   int result = 0;
-  if (YY_CURRENT_BUFFER->yy_input_file)
+  if (YY_CURRENT_BUFFER != NULL && YY_CURRENT_BUFFER->yy_input_file)
     {
       if (yyin)
 	{