From: Jagannathan Raman <jag.raman@oracle.com>
Date: Mon, 17 Oct 2022 14:04:39 +0000 (+0000)
Subject: kern/buffer: Handle NULL input pointer in grub_buffer_free()
X-Git-Tag: grub-2.12-rc1~242
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=82ff9faa5bff5b3669bc4144bfc9b2279d344483;p=thirdparty%2Fgrub.git

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

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>
---

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