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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 046EAC433F5 for ; Mon, 25 Oct 2021 19:18:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D706E60EBC for ; Mon, 25 Oct 2021 19:18:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234776AbhJYTUc (ORCPT ); Mon, 25 Oct 2021 15:20:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:37628 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234608AbhJYTTg (ORCPT ); Mon, 25 Oct 2021 15:19:36 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B00F060EBC; Mon, 25 Oct 2021 19:17:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1635189434; bh=Odl8UDWKBjYcjTCSPWj/Qnym7dzhzEKIInjH4DsDsME=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JFD/8vWSL/leADyYgibh4vdhiFtyO6hMQPrci7s7B01DNhQ56MtXMdkC1T4uBjZDA bJ6r1taypRHD70cbwMoaVtlka7YOkGoKuJ3w0Pnhb3JGMPBguyWxCsQXxMcCtn2M/J 1aKZ6KwyEKUY/yoXow4ojIND4OBMPVL2coSB/tao= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Damien Le Moal Subject: [PATCH 4.4 20/44] pata_legacy: fix a couple uninitialized variable bugs Date: Mon, 25 Oct 2021 21:14:01 +0200 Message-Id: <20211025190932.807136321@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211025190928.054676643@linuxfoundation.org> References: <20211025190928.054676643@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: Dan Carpenter commit 013923477cb311293df9079332cf8b806ed0e6f2 upstream. The last byte of "pad" is used without being initialized. Fixes: 55dba3120fbc ("libata: update ->data_xfer hook for ATAPI") Signed-off-by: Dan Carpenter Signed-off-by: Damien Le Moal Signed-off-by: Greg Kroah-Hartman --- drivers/ata/pata_legacy.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/drivers/ata/pata_legacy.c +++ b/drivers/ata/pata_legacy.c @@ -328,7 +328,8 @@ static unsigned int pdc_data_xfer_vlb(st iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); if (unlikely(slop)) { - __le32 pad; + __le32 pad = 0; + if (rw == READ) { pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr)); memcpy(buf + buflen - slop, &pad, slop); @@ -716,7 +717,8 @@ static unsigned int vlb32_data_xfer(stru ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); if (unlikely(slop)) { - __le32 pad; + __le32 pad = 0; + if (rw == WRITE) { memcpy(&pad, buf + buflen - slop, slop); iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);