From e413f9f13f6a8a591af0ac39ef50af02b42a0df8 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Wed, 12 Apr 2023 09:50:08 -0300
Subject: perf genelf: Use zfree() to reduce chances of use after free

Do defensive programming by using zfree() to initialize freed pointers
to NULL, so that eventual use after free result in a NULL pointer deref
instead of more subtle behaviour.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/genelf_debug.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/genelf_debug.c b/tools/perf/util/genelf_debug.c
index 8786c366566e..aa5dcc56b2ac 100644
--- a/tools/perf/util/genelf_debug.c
+++ b/tools/perf/util/genelf_debug.c
@@ -11,6 +11,7 @@
  * @author Philippe Elie
  */
 #include <linux/compiler.h>
+#include <linux/zalloc.h>
 #include <sys/types.h>
 #include <stdio.h>
 #include <getopt.h>
@@ -90,7 +91,7 @@ buffer_ext_init(struct buffer_ext *be)
 static void
 buffer_ext_exit(struct buffer_ext *be)
 {
-	free(be->data);
+	zfree(&be->data);
 }
 
 static inline size_t
-- 
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