From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.netfilter.org (mail.netfilter.org [217.70.188.207]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 0D50C16F27F; Mon, 12 Aug 2024 10:24:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.188.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723458298; cv=none; b=C/dksr26022CXi2pj6m/55NOuBlj95kZPkKa0yYcvx9vYiFnL2SHkpKFA9vy8PD0muIJVQdd5A013u10lw2+X0IZhYbajhp65zogHyabTMuZtyd/dq5cnsmf64KFFgjJqHDJrICNZqi63K78zIXhiC+dN0ZkCTnB1mifaYdYHO0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723458298; c=relaxed/simple; bh=3F5i7p7TlD20eYtbNbyTpyN/18/P2PXAZAvhqfKsTCs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=XCWvYm8IrZAClTXLEmjl2aro4Z+vwTuDm+/ukAUbMnRW7XmQ8Ikv4fXgIh3VYCmlvcO4p+yTYNgJHdarjSXkqMttedsfwXbjpbJq/p5x2vGtRKFUzuEcJT8UW6bB+uD/ULXft131XFRVmOcoMtyNvfOjTDCOzESJqNoQgmV43W8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=netfilter.org; spf=pass smtp.mailfrom=netfilter.org; arc=none smtp.client-ip=217.70.188.207 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=netfilter.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=netfilter.org From: Pablo Neira Ayuso To: netfilter-devel@vger.kernel.org Cc: gregkh@linuxfoundation.org, sashal@kernel.org, stable@vger.kernel.org Subject: [PATCH -stable,5.15.x 3/5] netfilter: nf_tables: bail out if stateful expression provides no .clone Date: Mon, 12 Aug 2024 12:24:44 +0200 Message-Id: <20240812102446.369777-4-pablo@netfilter.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20240812102446.369777-1-pablo@netfilter.org> References: <20240812102446.369777-1-pablo@netfilter.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit commit 3c13725f43dcf43ad8a9bcd6a9f12add19a8f93e upstream. All existing NFT_EXPR_STATEFUL provide a .clone interface, remove fallback to copy content of stateful expression since this is never exercised and bail out if .clone interface is not defined. Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_tables_api.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 04f4f75e74da..395bd8c1f5c3 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -3053,14 +3053,13 @@ int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src) { int err; - if (src->ops->clone) { - dst->ops = src->ops; - err = src->ops->clone(dst, src); - if (err < 0) - return err; - } else { - memcpy(dst, src, src->ops->size); - } + if (WARN_ON_ONCE(!src->ops->clone)) + return -EINVAL; + + dst->ops = src->ops; + err = src->ops->clone(dst, src); + if (err < 0) + return err; __module_get(src->ops->type->owner); -- 2.30.2