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,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 BD23BC4360C for ; Sun, 29 Sep 2019 17:32:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 97D1221D7F for ; Sun, 29 Sep 2019 17:32:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569778338; bh=VHqFPei1l3XYQuzGwjYB6MtsKq7T/Rtc2e+h2ot99yM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=z5IIilNT1KaZYqrNk0NelEcrVYP48qSkXtEaVmCRtHe2f6Edf5bSC+UImhvioNQx9 OQilf0a9rl1a/lpQAV892VCHL7Dz5hmruqMc68wAGCfF/NoAmd0sCHNrw6UpdbVLsd umjAOZi2JvkW2Xx3j1dCf6Rx9m594UkHBcGU/KAU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729720AbfI2RcR (ORCPT ); Sun, 29 Sep 2019 13:32:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:43020 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729690AbfI2RcN (ORCPT ); Sun, 29 Sep 2019 13:32:13 -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 1D2A021906; Sun, 29 Sep 2019 17:32:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569778332; bh=VHqFPei1l3XYQuzGwjYB6MtsKq7T/Rtc2e+h2ot99yM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UZ99K9rDMiD6+svrKZVZJl3eu0E/4zV20KF0IXwVXHnVdsj5uSwzsNOno3frUmcsS upNM5mCkqcCkwqO7np+HG2qVAI90Xjjodc5Ac7fllJCp4ymqjM1JeZu1PZaIb8+11E SKT3oZ0yP1emhMHb+rUThz4gVTzbgtNaTjb7J170= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yunfeng Ye , Herbert Xu , Sasha Levin , linux-crypto@vger.kernel.org Subject: [PATCH AUTOSEL 5.3 41/49] crypto: hisilicon - Fix double free in sec_free_hw_sgl() Date: Sun, 29 Sep 2019 13:30:41 -0400 Message-Id: <20190929173053.8400-41-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190929173053.8400-1-sashal@kernel.org> References: <20190929173053.8400-1-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: Yunfeng Ye [ Upstream commit 24fbf7bad888767bed952f540ac963bc57e47e15 ] There are two problems in sec_free_hw_sgl(): First, when sgl_current->next is valid, @hw_sgl will be freed in the first loop, but it free again after the loop. Second, sgl_current and sgl_current->next_sgl is not match when dma_pool_free() is invoked, the third parameter should be the dma address of sgl_current, but sgl_current->next_sgl is the dma address of next chain, so use sgl_current->next_sgl is wrong. Fix this by deleting the last dma_pool_free() in sec_free_hw_sgl(), modifying the condition for while loop, and matching the address for dma_pool_free(). Fixes: 915e4e8413da ("crypto: hisilicon - SEC security accelerator driver") Signed-off-by: Yunfeng Ye Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/hisilicon/sec/sec_algs.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/crypto/hisilicon/sec/sec_algs.c b/drivers/crypto/hisilicon/sec/sec_algs.c index 02768af0dccdd..8c789b8671fc4 100644 --- a/drivers/crypto/hisilicon/sec/sec_algs.c +++ b/drivers/crypto/hisilicon/sec/sec_algs.c @@ -215,17 +215,18 @@ static void sec_free_hw_sgl(struct sec_hw_sgl *hw_sgl, dma_addr_t psec_sgl, struct sec_dev_info *info) { struct sec_hw_sgl *sgl_current, *sgl_next; + dma_addr_t sgl_next_dma; - if (!hw_sgl) - return; sgl_current = hw_sgl; - while (sgl_current->next) { + while (sgl_current) { sgl_next = sgl_current->next; - dma_pool_free(info->hw_sgl_pool, sgl_current, - sgl_current->next_sgl); + sgl_next_dma = sgl_current->next_sgl; + + dma_pool_free(info->hw_sgl_pool, sgl_current, psec_sgl); + sgl_current = sgl_next; + psec_sgl = sgl_next_dma; } - dma_pool_free(info->hw_sgl_pool, hw_sgl, psec_sgl); } static int sec_alg_skcipher_setkey(struct crypto_skcipher *tfm, -- 2.20.1