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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E6BC6C4332F for ; Mon, 24 Jan 2022 18:54:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343895AbiAXSyJ (ORCPT ); Mon, 24 Jan 2022 13:54:09 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:51690 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236282AbiAXSwf (ORCPT ); Mon, 24 Jan 2022 13:52:35 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C514A614EC; Mon, 24 Jan 2022 18:52:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9CB7BC340E5; Mon, 24 Jan 2022 18:52:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643050354; bh=qtKkJMFmMPARKOd3X03qqmFD/4R6AL0N8Z/w7kj3lLo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=evSUhN1/wjx0RojmPt3msuMt54WzFH2avvDxM9oLw3ScE9fWiePCYElN/6rWOVdRw 9rXqImHreAF0BxyTZToSDqbKfQ+tJZ4QFQmM0KgPOd0yADf8S+pS9M8vji6SwoO1g2 1PaWwV5FQe82HNWkkQyJf/hScXRGzvC+zsO/53PA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kees Cook , Sasha Levin Subject: [PATCH 4.4 048/114] char/mwave: Adjust io port register size Date: Mon, 24 Jan 2022 19:42:23 +0100 Message-Id: <20220124183928.587436790@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124183927.095545464@linuxfoundation.org> References: <20220124183927.095545464@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Kees Cook [ Upstream commit f5912cc19acd7c24b2dbf65a6340bf194244f085 ] Using MKWORD() on a byte-sized variable results in OOB read. Expand the size of the reserved area so both MKWORD and MKBYTE continue to work without overflow. Silences this warning on a -Warray-bounds build: drivers/char/mwave/3780i.h:346:22: error: array subscript 'short unsigned int[0]' is partly outside array bounds of 'DSP_ISA_SLAVE_CONTROL[1]' [-Werror=array-bounds] 346 | #define MKWORD(var) (*((unsigned short *)(&var))) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/char/mwave/3780i.h:356:40: note: in definition of macro 'OutWordDsp' 356 | #define OutWordDsp(index,value) outw(value,usDspBaseIO+index) | ^~~~~ drivers/char/mwave/3780i.c:373:41: note: in expansion of macro 'MKWORD' 373 | OutWordDsp(DSP_IsaSlaveControl, MKWORD(rSlaveControl)); | ^~~~~~ drivers/char/mwave/3780i.c:358:31: note: while referencing 'rSlaveControl' 358 | DSP_ISA_SLAVE_CONTROL rSlaveControl; | ^~~~~~~~~~~~~ Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20211203084206.3104326-1-keescook@chromium.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/char/mwave/3780i.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/mwave/3780i.h b/drivers/char/mwave/3780i.h index fba6ab1160ce8..b167163b18277 100644 --- a/drivers/char/mwave/3780i.h +++ b/drivers/char/mwave/3780i.h @@ -68,7 +68,7 @@ typedef struct { unsigned char ClockControl:1; /* RW: Clock control: 0=normal, 1=stop 3780i clocks */ unsigned char SoftReset:1; /* RW: Soft reset 0=normal, 1=soft reset active */ unsigned char ConfigMode:1; /* RW: Configuration mode, 0=normal, 1=config mode */ - unsigned char Reserved:5; /* 0: Reserved */ + unsigned short Reserved:13; /* 0: Reserved */ } DSP_ISA_SLAVE_CONTROL; -- 2.34.1