From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3750317FF9 for ; Tue, 29 Aug 2023 13:33:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D16EC433C8; Tue, 29 Aug 2023 13:33:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1693316035; bh=+lDlZIwh9YO+GWW5KUibHH5CjJc9m+CI/kUqVP0XdAM=; h=From:To:Cc:Subject:Date:From; b=TLUfsN8nxb6mlBH7HUk4Z9Mh35iuWqvIf5Mr9u3lW+HaWYBuWwytjW3kQh28hrjVQ S27cQLi9K7JmiGLsPLXOClgnh/yOdr52i5L8JEu1XjUfvRgLyrUZzYInybEVxZr1vc DWHk4yo2JUlX+uW2DUt7gx6XYFKSXzD4nt56BugnspMVeM7RejsL4MWOAfuNLd41VJ M8y4xeCfQr/iRm+00kWltjVZR/NewhzslVPoaxvR9zsBa1WYoWJ9ejT1d9bw6qV2tK myIz5BSZxM9npIBYc6+s7z7D8HOjAdA3piVZC8QoGQmVE8VP/de3S9Y+mLDTW40DFq 4fLBHPSfwf2ig== 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: Tue, 29 Aug 2023 09:33:47 -0400 Message-Id: <20230829133352.520671-1-sashal@kernel.org> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.4.254 Content-Transfer-Encoding: 8bit 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; } -- 2.40.1