From 57336e2e4d05eaac6367400e6ce3aed24f838f2c Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Thu, 8 Dec 2022 11:45:12 +1030
Subject: [PATCH] libctf: avoid potential double free

	* ctf-link.c (ctf_link_add_cu_mapping): Set t NULL after free.
---
 libctf/ctf-link.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libctf/ctf-link.c b/libctf/ctf-link.c
index 702f2b4d5fe..902b4408cd6 100644
--- a/libctf/ctf-link.c
+++ b/libctf/ctf-link.c
@@ -431,7 +431,10 @@ ctf_link_add_cu_mapping (ctf_dict_t *fp, const char *from, const char *to)
 	}
     }
   else
-    free (t);
+    {
+      free (t);
+      t = NULL;
+    }
 
   if (ctf_dynhash_insert (one_out, f, NULL) < 0)
     {
-- 
2.30.2