From patchwork Mon Nov 8 10:11:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Borislav Petkov X-Patchwork-Id: 12608135 X-Patchwork-Delegate: kuba@kernel.org 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73BFDC433F5 for ; Mon, 8 Nov 2021 10:13:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60B45611C4 for ; Mon, 8 Nov 2021 10:13:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238575AbhKHKPm (ORCPT ); Mon, 8 Nov 2021 05:15:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238574AbhKHKPN (ORCPT ); Mon, 8 Nov 2021 05:15:13 -0500 Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42E42C061714; Mon, 8 Nov 2021 02:12:26 -0800 (PST) Received: from zn.tnic (p200300ec2f33110088892b77bd117736.dip0.t-ipconnect.de [IPv6:2003:ec:2f33:1100:8889:2b77:bd11:7736]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 8B61B1EC0516; Mon, 8 Nov 2021 11:12:25 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1636366345; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=81p4IKlZUJtfRfnIfPVwCEdhFh/UCrCf47nC2WuyJyI=; b=hk/VQz6TaLZ5BMhEiZkVv867QuxxYSUFl64uJ6A+1q39/ledBAMMCVtgeWcENM9g8qlIYX 65yMvc3jmxRQpS1GqB+pTpQOLRn6gdf0F2JS8zIWyokH/hWhK/vNgePGV0kJ2iE/jRl1x8 Mw4OhnKEFjN50AD+MrGOVZ5gLLz/Hxs= From: Borislav Petkov To: LKML Cc: netdev@vger.kernel.org Subject: [PATCH v0 22/42] net: fib_notifier: Check notifier registration return value Date: Mon, 8 Nov 2021 11:11:37 +0100 Message-Id: <20211108101157.15189-23-bp@alien8.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20211108101157.15189-1-bp@alien8.de> References: <20211108101157.15189-1-bp@alien8.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Borislav Petkov Avoid homegrown notifier registration checks. No functional changes. Signed-off-by: Borislav Petkov Cc: netdev@vger.kernel.org --- net/core/fib_notifier.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/core/fib_notifier.c b/net/core/fib_notifier.c index fc96259807b6..fa07d6a81ba0 100644 --- a/net/core/fib_notifier.c +++ b/net/core/fib_notifier.c @@ -86,7 +86,9 @@ static bool fib_dump_is_consistent(struct net *net, struct notifier_block *nb, { struct fib_notifier_net *fn_net = net_generic(net, fib_notifier_net_id); - atomic_notifier_chain_register(&fn_net->fib_chain, nb); + if (atomic_notifier_chain_register(&fn_net->fib_chain, nb)) + pr_warn("FIB notifier already registered\n"); + if (fib_seq == fib_seq_sum(net)) return true; atomic_notifier_chain_unregister(&fn_net->fib_chain, nb);