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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EF30FC433F5 for ; Sun, 27 Mar 2022 22:36:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236950AbiC0WiL (ORCPT ); Sun, 27 Mar 2022 18:38:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33660 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236943AbiC0WiK (ORCPT ); Sun, 27 Mar 2022 18:38:10 -0400 Received: from kadath.azazel.net (unknown [IPv6:2001:8b0:135f:bcd1:e0cb:4eff:fedf:e608]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A17411141 for ; Sun, 27 Mar 2022 15:36:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=azazel.net; s=20190108; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=7E+0LzssTJNLLVd+0aFH5RcVmMzLcOrrvBKi6gd+BNY=; b=Je6PxiQtVq+I1/YvU2BM5gtelD Uh7SHtjnRjUqaPOAcjhzP2R1HILPyMnkDuYop9GnICxnVir544JYsjruqbPPobau29rKWs6Q18GH3 VjyG/eBJU1M4CpnmvTi+73++i93s8fU/WDT7UzH5HRZ7ZNUXo37Liry4scs0WGDojc7ya95ext53A bZ0VUik9u5JcILi8aGgicxUpumxSSyUPx5/vCcHuaD/WXoMCvRY7PAyv8zWf4DPHkbxZk00+WN4/f lwfscFtXiRTv21tuiyxAzXzWts0p4gN81244x/NCS3/OhbLXri/eOOmJtuXgetR3Xvuwj1QdYzpvY wF7Cfkxg==; Received: from ulthar.dreamlands.azazel.net ([2001:8b0:fb7d:d6d7:2e4d:54ff:fe4b:a9ae]) by kadath.azazel.net with esmtp (Exim 4.94.2) (envelope-from ) id 1nYbUr-00DmvK-FI; Sun, 27 Mar 2022 23:36:29 +0100 From: Jeremy Sowden To: Pablo Neira Ayuso Cc: Netfilter Devel Subject: [nf PATCH v2] netfilter: bitwise: fix reduce comparisons Date: Sun, 27 Mar 2022 23:36:25 +0100 Message-Id: <20220327223625.134198-1-jeremy@azazel.net> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220327215223.73014-1-jeremy@azazel.net> References: <20220327215223.73014-1-jeremy@azazel.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:8b0:fb7d:d6d7:2e4d:54ff:fe4b:a9ae X-SA-Exim-Mail-From: jeremy@azazel.net X-SA-Exim-Scanned: No (on kadath.azazel.net); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org The `nft_bitwise_reduce` and `nft_bitwise_fast_reduce` functions should compare the bitwise operation in `expr` with the tracked operation associated with the destination register of `expr`. However, instead of being called on `expr` and `track->regs[priv->dreg].selector`, `nft_expr_priv` is called on `expr` twice, so both reduce functions return true even when the operations differ. Fixes: be5650f8f47e ("netfilter: nft_bitwise: track register operations") Signed-off-by: Jeremy Sowden --- Since v1: * fix `nft_bitwise_fast_reduce` as well as `nft_bitwise_reduce`. net/netfilter/nft_bitwise.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/netfilter/nft_bitwise.c b/net/netfilter/nft_bitwise.c index 7b727d3ebf9d..04bd2f89afe8 100644 --- a/net/netfilter/nft_bitwise.c +++ b/net/netfilter/nft_bitwise.c @@ -287,7 +287,7 @@ static bool nft_bitwise_reduce(struct nft_regs_track *track, if (!track->regs[priv->sreg].selector) return false; - bitwise = nft_expr_priv(expr); + bitwise = nft_expr_priv(track->regs[priv->dreg].selector); if (track->regs[priv->sreg].selector == track->regs[priv->dreg].selector && track->regs[priv->dreg].bitwise && track->regs[priv->dreg].bitwise->ops == expr->ops && @@ -434,7 +434,7 @@ static bool nft_bitwise_fast_reduce(struct nft_regs_track *track, if (!track->regs[priv->sreg].selector) return false; - bitwise = nft_expr_priv(expr); + bitwise = nft_expr_priv(track->regs[priv->dreg].selector); if (track->regs[priv->sreg].selector == track->regs[priv->dreg].selector && track->regs[priv->dreg].bitwise && track->regs[priv->dreg].bitwise->ops == expr->ops && -- 2.35.1