From nobody Tue Dec 24 01:35:27 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=none (zoho.com: 198.145.21.10 is neither permitted nor denied by domain of lists.01.org) smtp.mailfrom=edk2-devel-bounces@lists.01.org Return-Path: Received: from ml01.01.org (ml01.01.org [198.145.21.10]) by mx.zohomail.com with SMTPS id 1514881243127733.6793157403501; Tue, 2 Jan 2018 00:20:43 -0800 (PST) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 9073E2205BEA0; Tue, 2 Jan 2018 00:15:37 -0800 (PST) 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 59D492205BE9D for ; Tue, 2 Jan 2018 00:15:36 -0800 (PST) Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 Jan 2018 00:20:38 -0800 Received: from jwang36-mobl2.ccr.corp.intel.com ([10.239.192.34]) by fmsmga008.fm.intel.com with ESMTP; 02 Jan 2018 00:20:37 -0800 X-Original-To: edk2-devel@lists.01.org Received-SPF: none (zoho.com: 198.145.21.10 is neither permitted nor denied by domain of lists.01.org) client-ip=198.145.21.10; envelope-from=edk2-devel-bounces@lists.01.org; helo=ml01.01.org; Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=192.55.52.93; helo=mga11.intel.com; envelope-from=jian.j.wang@intel.com; receiver=edk2-devel@lists.01.org X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,495,1508828400"; d="scan'208";a="6802861" From: Jian J Wang To: edk2-devel@lists.01.org Date: Tue, 2 Jan 2018 16:20:21 +0800 Message-Id: <20180102082021.17792-3-jian.j.wang@intel.com> X-Mailer: git-send-email 2.15.1.windows.2 In-Reply-To: <20180102082021.17792-1-jian.j.wang@intel.com> References: <20180102082021.17792-1-jian.j.wang@intel.com> Subject: [edk2] [PATCH 2/2] MdeModulePkg/DxePrintLibPrint2Protocol: Fix incomplete print output X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jiewen Yao , Star Zeng , Liming Gao MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Errors-To: edk2-devel-bounces@lists.01.org Sender: "edk2-devel" X-ZohoMail: RSF_4 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" This is caused by a previous patch which tried to fix string over-read. It's found that that patch for PrintLib in MdePkg will cause premature terminating of loop used to traversing format string and cause incomplete string output. Because this library uses similar code to do the same job, it has the same issue too. So the fix is also the same. Cc: Liming Gao Cc: Jiewen Yao Cc: Star Zeng Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jian J Wang Reviewed-by: Star Zeng --- MdeModulePkg/Library/DxePrintLibPrint2Protocol/PrintLib.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/MdeModulePkg/Library/DxePrintLibPrint2Protocol/PrintLib.c b/Md= eModulePkg/Library/DxePrintLibPrint2Protocol/PrintLib.c index 0e6178fc9c..e09520c81b 100644 --- a/MdeModulePkg/Library/DxePrintLibPrint2Protocol/PrintLib.c +++ b/MdeModulePkg/Library/DxePrintLibPrint2Protocol/PrintLib.c @@ -2051,7 +2051,9 @@ InternalPrintLibSPrintMarker ( // ArgumentString is either null-terminated, or it contains Precisio= n characters // for (Count =3D 0; - ArgumentString[Count * BytesPerArgumentCharacter] !=3D '\0' && + (ArgumentString[Count * BytesPerArgumentCharacter] !=3D '\0' || + (BytesPerArgumentCharacter > 1 && + ArgumentString[Count * BytesPerArgumentCharacter + 1]!=3D '\= 0')) && (Count < Precision || ((Flags & PRECISION) =3D=3D 0)); Count++) { ArgumentCharacter =3D ((ArgumentString[Count * BytesPerArgumentCha= racter] & 0xff) | ((ArgumentString[Count * BytesPerArgumentCharacter + 1]) = << 8)) & ArgumentMask; @@ -2110,7 +2112,9 @@ InternalPrintLibSPrintMarker ( // // Copy the string into the output buffer performing the required type= conversions // - while (Index < Count && (*ArgumentString) !=3D '\0') { + while (Index < Count && + (ArgumentString[0] !=3D '\0' || + (BytesPerArgumentCharacter > 1 && ArgumentString[1] !=3D '\0')= )) { ArgumentCharacter =3D ((*ArgumentString & 0xff) | (((UINT8)*(Argumen= tString + 1)) << 8)) & ArgumentMask; =20 LengthToReturn +=3D (1 * BytesPerOutputCharacter); --=20 2.15.1.windows.2 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel