From patchwork Mon Sep 13 13:11:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 510690 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 66DDDC433FE for ; Mon, 13 Sep 2021 13:54:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5344661C13 for ; Mon, 13 Sep 2021 13:54:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244503AbhIMNzo (ORCPT ); Mon, 13 Sep 2021 09:55:44 -0400 Received: from mail.kernel.org ([198.145.29.99]:40482 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245024AbhIMNxj (ORCPT ); Mon, 13 Sep 2021 09:53:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 27183619E3; Mon, 13 Sep 2021 13:35:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1631540101; bh=6AkgcefdX8RMUOHmbdDoRVQalXnWARQVGajw38GXG2s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ae6B4Ls/7F8RlNwwX0jX4nZILGq3coQnawOu3SMGVMKtDzPCEaH2Px+YhxdHPQaE4 Y/89zWRj0xBH+EQ4qgLFFTqCOhnvmyM5/FhiyD/QIfoxqwkDrdOA2z7vmg3xErlLMT a5GLrOiDBWzjFRm8Jn0Cwn5VLKF9PFrMbymIdgpM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dave Hansen , syzbot , Ard Biesheuvel , Eric Biggers , Herbert Xu , Sasha Levin Subject: [PATCH 5.13 050/300] crypto: x86/aes-ni - add missing error checks in XTS code Date: Mon, 13 Sep 2021 15:11:51 +0200 Message-Id: <20210913131111.040600544@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210913131109.253835823@linuxfoundation.org> References: <20210913131109.253835823@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ard Biesheuvel [ Upstream commit 821720b9f34ec54106ebf012a712ba73bbcf47c2 ] The updated XTS code fails to check the return code of skcipher_walk_virt, which may lead to skcipher_walk_abort() or skcipher_walk_done() being called while the walk argument is in an inconsistent state. So check the return value after each such call, and bail on errors. Fixes: 2481104fe98d ("crypto: x86/aes-ni-xts - rewrite and drop indirections via glue helper") Reported-by: Dave Hansen Reported-by: syzbot Signed-off-by: Ard Biesheuvel Reviewed-by: Eric Biggers Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- arch/x86/crypto/aesni-intel_glue.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c index 2144e54a6c89..388643ca2177 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -849,6 +849,8 @@ static int xts_crypt(struct skcipher_request *req, bool encrypt) return -EINVAL; err = skcipher_walk_virt(&walk, req, false); + if (err) + return err; if (unlikely(tail > 0 && walk.nbytes < walk.total)) { int blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2; @@ -862,7 +864,10 @@ static int xts_crypt(struct skcipher_request *req, bool encrypt) skcipher_request_set_crypt(&subreq, req->src, req->dst, blocks * AES_BLOCK_SIZE, req->iv); req = &subreq; + err = skcipher_walk_virt(&walk, req, false); + if (err) + return err; } else { tail = 0; }