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 16473EB64DD for ; Mon, 26 Jun 2023 21:53:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231738AbjFZVxy (ORCPT ); Mon, 26 Jun 2023 17:53:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231610AbjFZVxQ (ORCPT ); Mon, 26 Jun 2023 17:53:16 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 098742720; Mon, 26 Jun 2023 14:51:35 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id B57B760FA1; Mon, 26 Jun 2023 21:51:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D0ACFC433CC; Mon, 26 Jun 2023 21:51:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1687816278; bh=pHx28e+t/THsLVmMcAyCtSXYbf++yJVnrB+rJRRiExk=; h=From:To:Cc:Subject:Date:From; b=rdu9LO8QATLMV2l58ggCOZFcwkhCnspDL/XNDtK1DYj4EhTOpXvOjLDKTTCJOiOGW J7Z/DeyoHl4n1kGWVAUkczyItNhMFlJM40NRIGk0JtXrtgfzHpG24D/ujVRkikzXve aUc3PTaqy5Oob9Zw/LJigLIcuElNIvHRQs83auqvP3dIGiSUn31vb8u7cDXKBltSfp mJkncInCFi5cEhDnS775XHP3brUUV/4u5MS91Gw9sbSPVVddPtS23Ldy59sIJ1siML PZJ2NQjLkpFkffDcoB2fzE5FBF0ajwbsryvw+/RGWp2gYBZagmWsWjQEWM2Rn9FU6b ZzGJ3PQfH/IZA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Mastykin , Paul Moore , "David S . Miller" , Sasha Levin , edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 1/6] netlabel: fix shift wrapping bug in netlbl_catmap_setlong() Date: Mon, 26 Jun 2023 17:51:11 -0400 Message-Id: <20230626215116.179581-1-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.4.248 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: From: Dmitry Mastykin [ Upstream commit b403643d154d15176b060b82f7fc605210033edd ] There is a shift wrapping bug in this code on 32-bit architectures. NETLBL_CATMAP_MAPTYPE is u64, bitmap is unsigned long. Every second 32-bit word of catmap becomes corrupted. Signed-off-by: Dmitry Mastykin Acked-by: Paul Moore Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/netlabel/netlabel_kapi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c index 91b35b7c80d82..96059c99b915e 100644 --- a/net/netlabel/netlabel_kapi.c +++ b/net/netlabel/netlabel_kapi.c @@ -857,7 +857,8 @@ int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap, offset -= iter->startbit; idx = offset / NETLBL_CATMAP_MAPSIZE; - iter->bitmap[idx] |= bitmap << (offset % NETLBL_CATMAP_MAPSIZE); + iter->bitmap[idx] |= (NETLBL_CATMAP_MAPTYPE)bitmap + << (offset % NETLBL_CATMAP_MAPSIZE); return 0; } -- 2.39.2