37 lines
1.1 KiB
Diff
37 lines
1.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Axtens <dja@axtens.net>
|
|
Date: Fri, 22 Jan 2021 16:18:26 +1100
|
|
Subject: [PATCH] script/execute: Don't crash on a "for" loop with no items
|
|
|
|
The following crashes the parser:
|
|
|
|
for x in; do
|
|
0
|
|
done
|
|
|
|
This is because grub_script_arglist_to_argv() doesn't consider the
|
|
possibility that arglist is NULL. Catch that explicitly.
|
|
|
|
This avoids a NULL pointer dereference.
|
|
|
|
Signed-off-by: Daniel Axtens <dja@axtens.net>
|
|
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
|
|
---
|
|
grub-core/script/execute.c | 3 +++
|
|
1 file changed, 3 insertions(+)
|
|
|
|
diff --git a/grub-core/script/execute.c b/grub-core/script/execute.c
|
|
index 17f4dcab2..266d99ed3 100644
|
|
--- a/grub-core/script/execute.c
|
|
+++ b/grub-core/script/execute.c
|
|
@@ -658,6 +658,9 @@ grub_script_arglist_to_argv (struct grub_script_arglist *arglist,
|
|
struct grub_script_arg *arg = 0;
|
|
struct grub_script_argv result = { 0, 0, 0 };
|
|
|
|
+ if (arglist == NULL)
|
|
+ return 1;
|
|
+
|
|
for (; arglist && arglist->arg; arglist = arglist->next)
|
|
{
|
|
if (grub_script_argv_next (&result))
|