From 94c56a4c65c9b2c0cb99f225fadffc2ca990c9d1 Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Tue, 23 Feb 2016 08:57:31 +0100
Subject: [PATCH] ieee1275: fix signed comparison
---
grub-core/kern/ieee1275/mmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/grub-core/kern/ieee1275/mmap.c b/grub-core/kern/ieee1275/mmap.c
index d7f6a1bde..bf325eadf 100644
--- a/grub-core/kern/ieee1275/mmap.c
+++ b/grub-core/kern/ieee1275/mmap.c
@@ -49,7 +49,7 @@ grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
sizeof available, &available_size))
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
"couldn't examine /memory/available property");
- if (available_size > sizeof (available))
+ if (available_size < 0 || (grub_size_t) available_size > sizeof (available))
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
"/memory response buffer exceeded");
--
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