grub2/SOURCES/0413-normal-completion-Fix-leaking-of-memory-when-process.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Darren Kenny <darren.kenny@oracle.com>
Date: Fri, 4 Dec 2020 18:56:48 +0000
Subject: [PATCH] normal/completion: Fix leaking of memory when processing a
 completion

It is possible for the code to reach the end of the function without
freeing the memory allocated to argv and argc still to be 0.

We should always call grub_free(argv). The grub_free() will handle
a NULL argument correctly if it reaches that code without the memory
being allocated.

Fixes: CID 96672

Signed-off-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/normal/completion.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/grub-core/normal/completion.c b/grub-core/normal/completion.c
index 93aa0d8ed..5036bcf2d 100644
--- a/grub-core/normal/completion.c
+++ b/grub-core/normal/completion.c
@@ -401,8 +401,8 @@ char *
 grub_normal_do_completion (char *buf, int *restore,
 			   void (*hook) (const char *, grub_completion_type_t, int))
 {
-  int argc;
-  char **argv;
+  int argc = 0;
+  char **argv = NULL;
 
   /* Initialize variables.  */
   match = 0;
@@ -517,10 +517,8 @@ grub_normal_do_completion (char *buf, int *restore,
 
  fail:
   if (argc != 0)
-    {
-      grub_free (argv[0]);
-      grub_free (argv);
-    }
+    grub_free (argv[0]);
+  grub_free (argv);
   grub_free (match);
   grub_errno = GRUB_ERR_NONE;