From 82ff9faa5bff5b3669bc4144bfc9b2279d344483 Mon Sep 17 00:00:00 2001
From: Jagannathan Raman <jag.raman@oracle.com>
Date: Mon, 17 Oct 2022 14:04:39 +0000
Subject: [PATCH] kern/buffer: Handle NULL input pointer in grub_buffer_free()

The grub_buffer_free() should handle NULL input pointer, similar to
grub_free(). If the pointer is not referencing any memory location,
grub_buffer_free() need not perform any function.

Fixes: CID 396931

Reference:https://git.savannah.gnu.org/cgit/grub.git/commit?id=82ff9faa5bff5b3669bc4144bfc9b2279d344483
Conflict:NA

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Ross Philipson <ross.philipson@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/kern/buffer.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/grub-core/kern/buffer.c b/grub-core/kern/buffer.c
index 9f5f8b867..a2587729c 100644
--- a/grub-core/kern/buffer.c
+++ b/grub-core/kern/buffer.c
@@ -49,8 +49,11 @@ grub_buffer_new (grub_size_t sz)
 void
 grub_buffer_free (grub_buffer_t buf)
 {
-  grub_free (buf->data);
-  grub_free (buf);
+  if (buf != NULL)
+    {
+	grub_free (buf->data);
+	grub_free (buf);
+    }
 }
 
 grub_err_t
-- 
2.28.0.windows.1