From patchwork Wed Jul 1 20:09:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11637175 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 75E0992A for ; Wed, 1 Jul 2020 20:18:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5E2022082F for ; Wed, 1 Jul 2020 20:18:53 +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="uEPTS9P/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726287AbgGAUSt (ORCPT ); Wed, 1 Jul 2020 16:18:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725915AbgGAUSs (ORCPT ); Wed, 1 Jul 2020 16:18:48 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18D46C08C5C1; Wed, 1 Jul 2020 13:18:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=PIZcUHBXRzg4FA/EeFx1uXo9md1v0NkQLsX0zI2zg6M=; b=uEPTS9P/57U6zVBU4HM1S/JoSB tuswIdLWP5PxsW0JaLId+9defgEDQOobmxYG10079sOiA4FZ9QuYU7izV5WAMygXJibP9qgZ/ilnb JHD2dnfhsNIrzk6MTPcm2E4j3wvD98k6UdoTBqX9TNUhQLeeMUzvtZ1q1UEhCBNse9nKIqrx+EURS /miA0OTip9oV7zBRpggY2SP+e9qoyQ6NcbmoPCR+ZI5kV7SeIyDeLixTRquF/Pveq77jNgfHbCIpa 5zApxMmoUulFgqTvqJZeRqtPEmdDQsI6lQV8vGejhoHExItK83UpN2IIBW8rpvvRfeRm+eelpnZ+C GxiMRoIA==; Received: from 213-225-32-40.nat.highway.a1.net ([213.225.32.40] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jqjBo-0001wu-BH; Wed, 01 Jul 2020 20:18:41 +0000 From: Christoph Hellwig To: Al Viro , Linus Torvalds Cc: Luis Chamberlain , Matthew Wilcox , Kees Cook , Iurii Zaikin , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 03/23] bpfilter: switch to kernel_write Date: Wed, 1 Jul 2020 22:09:31 +0200 Message-Id: <20200701200951.3603160-4-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200701200951.3603160-1-hch@lst.de> References: <20200701200951.3603160-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org While pipes don't really need sb_writers projection, __kernel_write is an interface better kept private, and the additional rw_verify_area does not hurt here. Signed-off-by: Christoph Hellwig --- net/bpfilter/bpfilter_kern.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c index c0f0990f30b604..1905e01c3aa9a7 100644 --- a/net/bpfilter/bpfilter_kern.c +++ b/net/bpfilter/bpfilter_kern.c @@ -50,7 +50,7 @@ static int __bpfilter_process_sockopt(struct sock *sk, int optname, req.len = optlen; if (!bpfilter_ops.info.pid) goto out; - n = __kernel_write(bpfilter_ops.info.pipe_to_umh, &req, sizeof(req), + n = kernel_write(bpfilter_ops.info.pipe_to_umh, &req, sizeof(req), &pos); if (n != sizeof(req)) { pr_err("write fail %zd\n", n);