From patchwork Mon May 11 11:19:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 11540279 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7FB3C15AB for ; Mon, 11 May 2020 11:19:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5E55F2082E for ; Mon, 11 May 2020 11:19:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="k7SqLLlC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729305AbgEKLTm (ORCPT ); Mon, 11 May 2020 07:19:42 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:52254 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729260AbgEKLTk (ORCPT ); Mon, 11 May 2020 07:19:40 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 04BBJSah099239; Mon, 11 May 2020 06:19:28 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1589195968; bh=D+FkBTnlxhFt8rwKSbgbew41pOYqmQRAEPiRqzTmXOQ=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=k7SqLLlClB8ZEFDGzF/pEUjn9BCGo8CrPPLntbI3b+zIRIG5Y5f+HFEkqF/iHxxmM rptNWFqR9e5RqifD7oSS0UxIFqrIPgD+VXAzz9u9Uz7HBCgqRoZbashL7sLX+DNUEF u59A9G19vHup5sEpc5STyVYuRMfsE9RvYj5S1cvQ= Received: from DLEE104.ent.ti.com (dlee104.ent.ti.com [157.170.170.34]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 04BBJSUk003413 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 11 May 2020 06:19:28 -0500 Received: from DLEE104.ent.ti.com (157.170.170.34) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Mon, 11 May 2020 06:19:28 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Mon, 11 May 2020 06:19:28 -0500 Received: from sokoban.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 04BBJKOY004306; Mon, 11 May 2020 06:19:27 -0500 From: Tero Kristo To: , , CC: Subject: [PATCHv2 4/7] crypto: omap-sham: huge buffer access fixes Date: Mon, 11 May 2020 14:19:10 +0300 Message-ID: <20200511111913.26541-5-t-kristo@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200511111913.26541-1-t-kristo@ti.com> References: <20200511111913.26541-1-t-kristo@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org The ctx internal buffer can only hold buflen amount of data, don't try to copy over more than that. Also, initialize the context sg pointer if we only have data in the context internal buffer, this can happen when closing a hash with certain data amounts. Signed-off-by: Tero Kristo --- drivers/crypto/omap-sham.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 0c837bbd8f0c..9823d7dfca9c 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -751,8 +751,15 @@ static int omap_sham_align_sgs(struct scatterlist *sg, int offset = rctx->offset; int bufcnt = rctx->bufcnt; - if (!sg || !sg->length || !nbytes) + if (!sg || !sg->length || !nbytes) { + if (bufcnt) { + sg_init_table(rctx->sgl, 1); + sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, bufcnt); + rctx->sg = rctx->sgl; + } + return 0; + } new_len = nbytes; @@ -896,7 +903,7 @@ static int omap_sham_prepare_request(struct ahash_request *req, bool update) if (hash_later < 0) hash_later = 0; - if (hash_later) { + if (hash_later && hash_later <= rctx->buflen) { scatterwalk_map_and_copy(rctx->buffer, req->src, req->nbytes - hash_later,