From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43A54C31E40 for ; Tue, 6 Aug 2019 21:45:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0E45321874 for ; Tue, 6 Aug 2019 21:45:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565127947; bh=Jk5erRwdW6Xn1aFjjqOIfAEDX4aSw+GfypMFT+zJTA4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dRv8jY2prNDEFfm85tcm8P2rf2Lbz4g05BJOKKVAzcQO9CNkLIkSvXqra23qNmnML PH7Z6xETCLwa2WP+xjPzbhMy/gZoaRJ8La4jlcputFMWwdb+r9Kps8CcZcgPJRZ6E5 prv06hCCwHcmBrdwVzCOm5T8Ldu9r+wi+tu4fR6M= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729048AbfHFVpn (ORCPT ); Tue, 6 Aug 2019 17:45:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:51768 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727357AbfHFVdy (ORCPT ); Tue, 6 Aug 2019 17:33:54 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A10FE217D7; Tue, 6 Aug 2019 21:33:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565127233; bh=Jk5erRwdW6Xn1aFjjqOIfAEDX4aSw+GfypMFT+zJTA4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=feHyXgTcy9GqrMhZxry1QlRp1GoyC86IVKzC3w4cKySDKWAyf/igLa2nOeNUW2x+L ZgAxG+rTdaTGGH0KLspj7EJEUonaP0r1bvriEjqxU6K/ANp1h5l4PPK+uUNpYzHeUp YxcWsgSWi1ZD8m9cEfbDaGmRrMN652J1pZqg1MdQ= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kees Cook , Jeffrin Jose T , Nick Desaulniers , Jens Axboe , Sasha Levin , linux-ide@vger.kernel.org Subject: [PATCH AUTOSEL 5.2 20/59] libata: zpodd: Fix small read overflow in zpodd_get_mech_type() Date: Tue, 6 Aug 2019 17:32:40 -0400 Message-Id: <20190806213319.19203-20-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190806213319.19203-1-sashal@kernel.org> References: <20190806213319.19203-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kees Cook [ Upstream commit 71d6c505b4d9e6f76586350450e785e3d452b346 ] Jeffrin reported a KASAN issue: BUG: KASAN: global-out-of-bounds in ata_exec_internal_sg+0x50f/0xc70 Read of size 16 at addr ffffffff91f41f80 by task scsi_eh_1/149 ... The buggy address belongs to the variable: cdb.48319+0x0/0x40 Much like commit 18c9a99bce2a ("libata: zpodd: small read overflow in eject_tray()"), this fixes a cdb[] buffer length, this time in zpodd_get_mech_type(): We read from the cdb[] buffer in ata_exec_internal_sg(). It has to be ATAPI_CDB_LEN (16) bytes long, but this buffer is only 12 bytes. Reported-by: Jeffrin Jose T Fixes: afe759511808c ("libata: identify and init ZPODD devices") Link: https://lore.kernel.org/lkml/201907181423.E808958@keescook/ Tested-by: Jeffrin Jose T Reviewed-by: Nick Desaulniers Signed-off-by: Kees Cook Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/ata/libata-zpodd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ata/libata-zpodd.c b/drivers/ata/libata-zpodd.c index 173e6f2dd9af0..eefda51f97d35 100644 --- a/drivers/ata/libata-zpodd.c +++ b/drivers/ata/libata-zpodd.c @@ -56,7 +56,7 @@ static enum odd_mech_type zpodd_get_mech_type(struct ata_device *dev) unsigned int ret; struct rm_feature_desc *desc; struct ata_taskfile tf; - static const char cdb[] = { GPCMD_GET_CONFIGURATION, + static const char cdb[ATAPI_CDB_LEN] = { GPCMD_GET_CONFIGURATION, 2, /* only 1 feature descriptor requested */ 0, 3, /* 3, removable medium feature */ 0, 0, 0,/* reserved */ -- 2.20.1