From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=134.134.136.100; helo=mga07.intel.com; envelope-from=ruiyu.ni@intel.com; receiver=edk2-devel@lists.01.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (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 E81522116DA0C for ; Sun, 14 Oct 2018 23:37:34 -0700 (PDT) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Oct 2018 23:37:34 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,383,1534834800"; d="scan'208";a="78046742" Received: from ray-dev.ccr.corp.intel.com ([10.239.9.11]) by fmsmga007.fm.intel.com with ESMTP; 14 Oct 2018 23:37:33 -0700 From: Ruiyu Ni To: edk2-devel@lists.01.org Cc: Star Zeng , Jiewen Yao Date: Mon, 15 Oct 2018 14:38:26 +0800 Message-Id: <20181015063833.61304-5-ruiyu.ni@intel.com> X-Mailer: git-send-email 2.16.1.windows.1 In-Reply-To: <20181015063833.61304-1-ruiyu.ni@intel.com> References: <20181015063833.61304-1-ruiyu.ni@intel.com> Subject: [PATCH 04/11] MdeModulePkg/UsbBus: Reject descriptor whose length is bad X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Oct 2018 06:37:35 -0000 Today's implementation doesn't check whether the length of descriptor is valid before using it. The patch fixes this issue. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ruiyu Ni Cc: Star Zeng Cc: Jiewen Yao --- MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c index a93060deea..d9bc1f9e28 100644 --- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c +++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c @@ -767,6 +767,13 @@ UsbGetOneConfig ( DEBUG (( EFI_D_INFO, "UsbGetOneConfig: total length is %d\n", Desc.TotalLength)); + // + // Reject if TotalLength even cannot cover itself. + // + if (Desc.TotalLength < OFFSET_OF (EFI_USB_CONFIG_DESCRIPTOR, TotalLength) + sizeof (Desc.TotalLength)) { + return NULL; + } + Buf = AllocateZeroPool (Desc.TotalLength); if (Buf == NULL) { -- 2.16.1.windows.1