File mokutil-check-corrupted-key-list.patch of Package mokutil

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File mokutil-check-corrupted-key-list.patch of Package mokutil

From e2e549583543bb0d607670b25af75821f55d5538 Mon Sep 17 00:00:00 2001
From: Gary Ching-Pang Lin <glin@suse.com>
Date: Thu, 10 Apr 2014 12:36:29 +0800
Subject: [PATCH] Check corrupted key list

Signed-off-by: Gary Ching-Pang Lin <glin@suse.com>
---
 src/mokutil.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/mokutil.c b/src/mokutil.c
index eb563ca..6792823 100644
--- a/src/mokutil.c
+++ b/src/mokutil.c
@@ -237,6 +237,14 @@ build_mok_list (void *data, unsigned long data_size, uint32_t *mok_num)
 	unsigned long count = 0;
 
 	while ((dbsize > 0) && (dbsize >= CertList->SignatureListSize)) {
+		if (CertList->SignatureListSize == 0 ||
+		    CertList->SignatureListSize <= CertList->SignatureSize) {
+			fprintf (stderr, "Corrupted signature list\n");
+			if (list)
+				free (list);
+			return NULL;
+		}
+
 		if ((efi_guidcmp (CertList->SignatureType, EfiCertX509Guid) != 0) &&
 		    (efi_guidcmp (CertList->SignatureType, EfiHashSha1Guid) != 0) &&
 		    (efi_guidcmp (CertList->SignatureType, EfiHashSha224Guid) != 0) &&
-- 
1.8.4.5

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File mokutil-check-corrupted-key-list.patch of Package mokutil

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