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=-9.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,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 40499C072B1 for ; Thu, 30 May 2019 03:46:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 147C024CBE for ; Thu, 30 May 2019 03:46:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559187978; bh=5PplgaAws3iXqb6sbpckHoEGhKhqIT2kiGkYsYt5o04=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kA6YDY+CGCk42ROZ6ji7+ZJIzkqBsA47RDxRswysAE4BX6cpqUppgEIJiwTzZfZJD KSubxWV7L7X4pFGFAhOokicju2CgnYuh9dsptRwI5ooQrJGUyoHYnj11wYTvaftLJe /E26EbsFKVW734407P5pp38JIYcNiU/MRfe04o+c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732036AbfE3DqP (ORCPT ); Wed, 29 May 2019 23:46:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:59298 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732295AbfE3DUm (ORCPT ); Wed, 29 May 2019 23:20:42 -0400 Received: from localhost (ip67-88-213-2.z213-88-67.customer.algx.net [67.88.213.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CCB5024949; Thu, 30 May 2019 03:20:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559186441; bh=5PplgaAws3iXqb6sbpckHoEGhKhqIT2kiGkYsYt5o04=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EcIGmiEvIsxWG/oyt+pNK4MaVrssJ40bKpDAdkI7k23Qa3CnUBAn0Z+7jCOWKnY6C MSMVC3o/2jaaNJSNe7F0W9c/SIbs95wxFpSE/P2C/Wn8Kq6pJtCGld4p1BkRi/Zqir ZRW0enx7bFdYgMpbzysxQv3wDjxEAugECBG2omSg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Corentin Labbe , Herbert Xu , Sasha Levin Subject: [PATCH 4.9 045/128] crypto: sun4i-ss - Fix invalid calculation of hash end Date: Wed, 29 May 2019 20:06:17 -0700 Message-Id: <20190530030442.779255122@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190530030432.977908967@linuxfoundation.org> References: <20190530030432.977908967@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit f87391558acf816b48f325a493d81d45dec40da0 ] When nbytes < 4, end is wronlgy set to a negative value which, due to uint, is then interpreted to a large value leading to a deadlock in the following code. This patch fix this problem. Fixes: 6298e948215f ("crypto: sunxi-ss - Add Allwinner Security System crypto accelerator") Signed-off-by: Corentin Labbe Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c index 0de2f62d51ff7..ec16ec2e284d0 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c @@ -250,7 +250,10 @@ static int sun4i_hash(struct ahash_request *areq) } } else { /* Since we have the flag final, we can go up to modulo 4 */ - end = ((areq->nbytes + op->len) / 4) * 4 - op->len; + if (areq->nbytes < 4) + end = 0; + else + end = ((areq->nbytes + op->len) / 4) * 4 - op->len; } /* TODO if SGlen % 4 and op->len == 0 then DMA */ -- 2.20.1