From: Alec Brown <alec.r.brown@oracle.com>
Date: Wed, 22 Jan 2025 18:04:44 +0000 (+0000)
Subject: net: Check if returned pointer for allocated memory is NULL
X-Git-Tag: archive/raspbian/2.12-8+rpi1^2~15
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=93cc584dce5fba9c488ba1008d27168cc73559e5;p=grub2.git

net: Check if returned pointer for allocated memory is NULL

When using grub_malloc(), the function can fail if we are out of memory.
After allocating memory we should check if this function returned NULL
and handle this error if it did.

Signed-off-by: Alec Brown <alec.r.brown@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

Gbp-Pq: Topic cve-2025-jan
Gbp-Pq: Name net-Check-if-returned-pointer-for-allocated-memory-is-NUL.patch
---

diff --git a/grub-core/net/net.c b/grub-core/net/net.c
index fb41d27..7ec4823 100644
--- a/grub-core/net/net.c
+++ b/grub-core/net/net.c
@@ -230,6 +230,11 @@ grub_net_ipv6_get_slaac (struct grub_net_card *card,
     }
 
   slaac->name = grub_malloc (sz);
+  if (slaac->name == NULL)
+    {
+      grub_free (slaac);
+      return NULL;
+    }
   ptr = grub_stpcpy (slaac->name, card->name);
   if (grub_net_hwaddr_cmp (&card->default_address, hwaddr) != 0)
     {