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 X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B47C8C433E3 for ; Mon, 27 Jul 2020 10:46:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F399206E7 for ; Mon, 27 Jul 2020 10:46:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728256AbgG0Kqj (ORCPT ); Mon, 27 Jul 2020 06:46:39 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:36312 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727897AbgG0Kqj (ORCPT ); Mon, 27 Jul 2020 06:46:39 -0400 Received: from ip5f5af08c.dynamic.kabel-deutschland.de ([95.90.240.140] helo=wittgenstein) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1k00eT-00077R-By; Mon, 27 Jul 2020 10:46:37 +0000 Date: Mon, 27 Jul 2020 12:46:36 +0200 From: Christian Brauner To: Christoph Hellwig Cc: linux-kernel@vger.kernel.org Subject: bpfilter logging write errors in dmesg Message-ID: <20200727104636.nuz3u4xb7ba7ue5a@wittgenstein> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hey Christoph, Seems that commit 6955a76fbcd5 ("bpfilter: switch to kernel_write") causes bpfilter to spew these useless messages in dmesg? [ 26.356824] Started bpfilter [ 26.357059] bpfilter: write fail -22 [ 26.396244] Started bpfilter [ 26.396325] bpfilter: Loaded bpfilter_umh pid 637 [ 26.396542] bpfilter: write fail -22 [ 26.409588] bpfilter: Loaded bpfilter_umh pid 638 [ 26.410790] Started bpfilter [ 26.410960] bpfilter: write fail -22 [ 26.445718] Started bpfilter [ 26.445799] bpfilter: Loaded bpfilter_umh pid 640 [ 26.445983] bpfilter: write fail -22 [ 26.451122] bpfilter: read fail 0 [ 26.496497] bpfilter: Loaded bpfilter_umh pid 648 [ 26.497889] Started bpfilter [ 26.750028] bpfilter: write fail -22 [ 26.768400] Started bpfilter [ 26.768496] bpfilter: Loaded bpfilter_umh pid 661 [ 26.768699] bpfilter: write fail -22 [ 26.806550] Started bpfilter [ 26.806616] bpfilter: Loaded bpfilter_umh pid 663 [ 26.864708] bpfilter: write fail -22 [ 26.872345] bpfilter: Loaded bpfilter_umh pid 666 [ 26.873072] Started bpfilter [ 26.873194] bpfilter: write fail -22 [ 27.295514] kauditd_printk_skb: 22 callbacks suppressed This is on a pure v5.8-rc7 via make bindep-pkg. I'm not using bpfilter in any shape or form afaict and haven't seen those messages before and this seems to be the last change I see. Thanks! Christian