From patchwork Tue Jun 16 03:25:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 11606309 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 ED58E912 for ; Tue, 16 Jun 2020 03:25:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D49462082F for ; Tue, 16 Jun 2020 03:25:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="IgudgnzK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726946AbgFPDZj (ORCPT ); Mon, 15 Jun 2020 23:25:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44662 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726791AbgFPDZb (ORCPT ); Mon, 15 Jun 2020 23:25:31 -0400 Received: from mail-pl1-x643.google.com (mail-pl1-x643.google.com [IPv6:2607:f8b0:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D8248C08C5CB for ; Mon, 15 Jun 2020 20:25:30 -0700 (PDT) Received: by mail-pl1-x643.google.com with SMTP id n2so7746901pld.13 for ; Mon, 15 Jun 2020 20:25:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=d7bw5q/TJxpqMicrHyIFon0t9gt+svhVPDuc7AUFnrI=; b=IgudgnzK6YOeQXxO/GhbZyRnD7yKsB19/poCwHH5zYg0DNwv/OjS7ClaVfKBcPYMJl gk02nAiuMCNLKeX/ZV8hAsNyo4xkNMZpUlVd73LjLWPTM3vu0gDsAt4qIgmqVBNttPDZ W8gmwOqh2kvJFeY1MjkoUB2YMUS901i5ZFCmE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=d7bw5q/TJxpqMicrHyIFon0t9gt+svhVPDuc7AUFnrI=; b=P4erS5pCncTMByKXGJeCCPSvmp17LB8h7eGZIlXqtxvs6yB7pZOzngW1+p8aL8brMw 5IiXNYVvk04KUjuRa3iCs2owIHzmdYN14CJ01tGeQLjWQNzlihBgwkv+ohZa+3HQ4UTd c/4qT48hgZsdeWuOC/9zc4//OKBu2M5pY0q7S5Z7hUMM0lm5H6mDqOmXz8A2qx5UIv2o +nN2TBdZdIJxMnuFWhOSlqwMPhCG7EbsW+sVzHlGf6TkpXPiOeeij9LuJfm2Q7QdEyWH WGCNedSiJh7FdFQNmyC3ywootVEGm8V7fmmhQRV9GuDcQGrAXfdKys6jub0g4/Q2/tba PdMg== X-Gm-Message-State: AOAM533yp6PWslfIGQRuvNrdb4ddd9ydAbg8LKOgok5uMbhaJxnywP+B eZP+y/9lgUiEPAd/23wE6N9qzA== X-Google-Smtp-Source: ABdhPJw66Qb+fMMy1G2QTWCPav55PuClQnfisvC1pdmVOLwHIqdy34tq0HaqwNMimHEa+bRLc4w0yQ== X-Received: by 2002:a17:902:8346:: with SMTP id z6mr329196pln.27.1592277930455; Mon, 15 Jun 2020 20:25:30 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id u4sm762715pjn.42.2020.06.15.20.25.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2020 20:25:28 -0700 (PDT) From: Kees Cook To: linux-kernel@vger.kernel.org Cc: Kees Cook , Sargun Dhillon , Christian Brauner , "David S. Miller" , Christoph Hellwig , Tycho Andersen , Jakub Kicinski , Alexander Viro , Aleksa Sarai , Matt Denton , Jann Horn , Chris Palmer , Robert Sesek , Giuseppe Scrivano , Greg Kroah-Hartman , Andy Lutomirski , Will Drewry , Shuah Khan , netdev@vger.kernel.org, containers@lists.linux-foundation.org, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v4 04/11] pidfd: Replace open-coded partial fd_install_received() Date: Mon, 15 Jun 2020 20:25:17 -0700 Message-Id: <20200616032524.460144-5-keescook@chromium.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200616032524.460144-1-keescook@chromium.org> References: <20200616032524.460144-1-keescook@chromium.org> MIME-Version: 1.0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The sock counting (sock_update_netprioidx() and sock_update_classid()) was missing from pidfd's implementation of received fd installation. Replace the open-coded version with a call to the new fd_install_received() helper. Fixes: 8649c322f75c ("pid: Implement pidfd_getfd syscall") Signed-off-by: Kees Cook --- kernel/pid.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/kernel/pid.c b/kernel/pid.c index f1496b757162..24924ec5df0e 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -635,18 +635,9 @@ static int pidfd_getfd(struct pid *pid, int fd) if (IS_ERR(file)) return PTR_ERR(file); - ret = security_file_receive(file); - if (ret) { - fput(file); - return ret; - } - - ret = get_unused_fd_flags(O_CLOEXEC); + ret = fd_install_received(file, O_CLOEXEC); if (ret < 0) fput(file); - else - fd_install(ret, file); - return ret; }