|
 |
80913e |
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
|
80913e |
From: Darren Kenny <darren.kenny@oracle.com>
|
|
|
80913e |
Date: Fri, 27 Nov 2020 15:10:26 +0000
|
|
|
80913e |
Subject: [PATCH] net/net: Fix possible dereference to of a NULL pointer
|
|
|
80913e |
|
|
|
80913e |
It is always possible that grub_zalloc() could fail, so we should check for
|
|
|
80913e |
a NULL return. Otherwise we run the risk of dereferencing a NULL pointer.
|
|
|
80913e |
|
|
|
80913e |
Fixes: CID 296221
|
|
|
80913e |
|
|
|
80913e |
Signed-off-by: Darren Kenny <darren.kenny@oracle.com>
|
|
|
80913e |
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
|
|
|
80913e |
---
|
|
|
80913e |
grub-core/net/net.c | 9 +++++++--
|
|
|
80913e |
1 file changed, 7 insertions(+), 2 deletions(-)
|
|
|
80913e |
|
|
|
80913e |
diff --git a/grub-core/net/net.c b/grub-core/net/net.c
|
|
|
80913e |
index 1fd104aeaf2..a27c53eee1c 100644
|
|
|
80913e |
--- a/grub-core/net/net.c
|
|
|
80913e |
+++ b/grub-core/net/net.c
|
|
|
80913e |
@@ -89,8 +89,13 @@ grub_net_link_layer_add_address (struct grub_net_card *card,
|
|
|
80913e |
|
|
|
80913e |
/* Add sender to cache table. */
|
|
|
80913e |
if (card->link_layer_table == NULL)
|
|
|
80913e |
- card->link_layer_table = grub_zalloc (LINK_LAYER_CACHE_SIZE
|
|
|
80913e |
- * sizeof (card->link_layer_table[0]));
|
|
|
80913e |
+ {
|
|
|
80913e |
+ card->link_layer_table = grub_zalloc (LINK_LAYER_CACHE_SIZE
|
|
|
80913e |
+ * sizeof (card->link_layer_table[0]));
|
|
|
80913e |
+ if (card->link_layer_table == NULL)
|
|
|
80913e |
+ return;
|
|
|
80913e |
+ }
|
|
|
80913e |
+
|
|
|
80913e |
entry = &(card->link_layer_table[card->new_ll_entry]);
|
|
|
80913e |
entry->avail = 1;
|
|
|
80913e |
grub_memcpy (&entry->ll_address, ll, sizeof (entry->ll_address));
|