From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=192.55.52.93; helo=mga11.intel.com; envelope-from=chen.a.chen@intel.com; receiver=edk2-devel@lists.01.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 885A821A1099A for ; Sun, 26 Nov 2017 17:53:23 -0800 (PST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Nov 2017 17:57:44 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,462,1505804400"; d="scan'208";a="1248842671" Received: from chenche4.ccr.corp.intel.com ([10.239.158.36]) by fmsmga002.fm.intel.com with ESMTP; 26 Nov 2017 17:57:43 -0800 From: chenc2 To: edk2-devel@lists.01.org Cc: chenc2 , Zhang Chao Date: Mon, 27 Nov 2017 09:57:41 +0800 Message-Id: <20171127015741.6792-1-chen.a.chen@intel.com> X-Mailer: git-send-email 2.13.2.windows.1 Subject: [PATCH] SecurityPkg/SecureBootConfigDxe: Fix deleting signature data issue. X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 27 Nov 2017 01:53:23 -0000 Replace "(UINT8 *)NewVariableData" with (UINT8 *)NewVariableData + Offset" to avoid the header of EFI_SIGNATURE_LIST being copied to the front of NewVariableData every time and update ListWalker when handling the current EFI_SIGNATURE_LIST finishes. Cc: Zhang Chao Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: chenc2 --- .../SecureBootConfigDxe/SecureBootConfigImpl.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.c b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.c index d035763106..e3066f77be 100644 --- a/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.c +++ b/SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.c @@ -3145,6 +3145,9 @@ DeleteSignatureEx ( if (DelType == Delete_Signature_List_All) { VariableDataSize = 0; } else { + // + // Traverse to target EFI_SIGNATURE_LIST but others will be skipped. + // while ((RemainingSize > 0) && (RemainingSize >= ListWalker->SignatureListSize) && ListIndex < PrivateData->ListIndex) { CopyMem ((UINT8 *)NewVariableData + Offset, ListWalker, ListWalker->SignatureListSize); Offset += ListWalker->SignatureListSize; @@ -3154,15 +3157,17 @@ DeleteSignatureEx ( ListIndex++; } - if (CheckedCount == SIGNATURE_DATA_COUNTS (ListWalker) || DelType == Delete_Signature_List_One) { - RemainingSize -= ListWalker->SignatureListSize; - ListWalker = (EFI_SIGNATURE_LIST *)((UINT8 *)ListWalker + ListWalker->SignatureListSize); - } else { + // + // Handle the target EFI_SIGNATURE_LIST. + // If CheckedCount == SIGNATURE_DATA_COUNTS (ListWalker) or DelType == Delete_Signature_List_One + // it means delete the whole EFI_SIGNATURE_LIST, So we just skip this EFI_SIGNATURE_LIST. + // + if (CheckedCount < SIGNATURE_DATA_COUNTS (ListWalker) && DelType == Delete_Signature_Data) { NewCertList = (EFI_SIGNATURE_LIST *)(NewVariableData + Offset); // // Copy header. // - CopyMem ((UINT8 *)NewVariableData, ListWalker, sizeof (EFI_SIGNATURE_LIST) + ListWalker->SignatureHeaderSize); + CopyMem ((UINT8 *)NewVariableData + Offset, ListWalker, sizeof (EFI_SIGNATURE_LIST) + ListWalker->SignatureHeaderSize); Offset += sizeof (EFI_SIGNATURE_LIST) + ListWalker->SignatureHeaderSize; DataWalker = (EFI_SIGNATURE_DATA *)((UINT8 *)ListWalker + sizeof(EFI_SIGNATURE_LIST) + ListWalker->SignatureHeaderSize); @@ -3181,10 +3186,11 @@ DeleteSignatureEx ( } DataWalker = (EFI_SIGNATURE_DATA *)((UINT8 *)DataWalker + ListWalker->SignatureSize); } - - RemainingSize -= ListWalker->SignatureListSize; } + RemainingSize -= ListWalker->SignatureListSize; + ListWalker = (EFI_SIGNATURE_LIST *)((UINT8 *)ListWalker + ListWalker->SignatureListSize); + // // Copy remaining data, maybe 0. // -- 2.13.2.windows.1