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=-3.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 DB9CAC2BA1A for ; Fri, 24 Apr 2020 06:43:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8568120767 for ; Fri, 24 Apr 2020 06:43:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="O5rZfLz/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8568120767 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D83ED8E0005; Fri, 24 Apr 2020 02:43:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D33558E0003; Fri, 24 Apr 2020 02:43:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C4A098E0005; Fri, 24 Apr 2020 02:43:47 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0026.hostedemail.com [216.40.44.26]) by kanga.kvack.org (Postfix) with ESMTP id AB20B8E0003 for ; Fri, 24 Apr 2020 02:43:47 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 7AB85442B for ; Fri, 24 Apr 2020 06:43:47 +0000 (UTC) X-FDA: 76741808094.21.flag73_5b47a0f62e71b X-HE-Tag: flag73_5b47a0f62e71b X-Filterd-Recvd-Size: 2279 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf10.hostedemail.com (Postfix) with ESMTP for ; Fri, 24 Apr 2020 06:43:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=cBz4tJHnQHNWX5/s05IRxaWmdiK710lyvwkHBVoVZ1A=; b=O5rZfLz/kA3hjQLqxThURHHFHw WVdVmpBegPWygKZU22Jw9l3pQ9IWS/996tNQ0C4wj38TTWNK7myf+3P6LrFcc+AZZ1lsqPYKzKqfG vzIzFiC+ccCq9PcH3pGYeyq5JAlL0Tsy4CyZrjfJRHRNySyHnov41WcAoZoGZlXBciOzPgBAxG++8 FNybSovzHbahApoVHS4sp5bL/X1eeQdr7b1XitrN/2ysBS1Vl4+xx7HZ3r6Jl3ZzjTCjwZ4BPFfL4 UER/3AcVJUKAo8h2UqFT8wUr5Z1TdIQzGfwkcfq6oWHFURm4j/w3I5c9jTHqm1ksyMV4QbNaItlTI 9agJNzvA==; Received: from [2001:4bb8:193:f203:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jRs3o-00012a-Hd; Fri, 24 Apr 2020 06:43:40 +0000 From: Christoph Hellwig To: Kees Cook , Iurii Zaikin Cc: Alexei Starovoitov , Daniel Borkmann , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org Subject: pass kernel pointers to the sysctl ->proc_handler method v3 Date: Fri, 24 Apr 2020 08:43:33 +0200 Message-Id: <20200424064338.538313-1-hch@lst.de> X-Mailer: git-send-email 2.26.1 MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi all, this series changes the sysctl ->proc_handler methods to take kernel pointers. This simplifies some of the pointer handling in the methods (which could probably be further simplified now), and gets rid of the set_fs address space overrides used by bpf. Changes since v2: - free the buffer modified by BPF - move pid_max and friends to pid.h Changes since v1: - drop a patch merged by Greg - don't copy data out on a write - fix buffer allocation in bpf