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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 D86FEC433F5 for ; Mon, 13 Sep 2021 22:34:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BDFCF6124D for ; Mon, 13 Sep 2021 22:34:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245330AbhIMWf4 (ORCPT ); Mon, 13 Sep 2021 18:35:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:50722 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348390AbhIMWfW (ORCPT ); Mon, 13 Sep 2021 18:35:22 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3406D61163; Mon, 13 Sep 2021 22:34:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631572446; bh=zGBAYFJpWCBJwShup3H4U2EPZYTc5BvLr0AMTxsTDmg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ti97m0ccDAABfOkG8pejUjVk0U8yfFmUKGS7ZJ/Sm+dVwfR6830N7E0MBheBaB3fI t1NUgcrpaBfrJXs8/uYfTG5Ew7420ZHGyyqJuA57LsuHZNm4u2sWNbIlGpqSbbvJrd Zb8maQA/RWBToZxJfmLT2HFm3QNuaov1XHV9dmIKc8TfLwlWKWY0AagzWu3FViEqlL v21bHxs2/T1ZrpK70ipiQGTGm2YRs2alcxe7iz+ieUYWp46ZQqh0h82/sDD01MCqo+ ITU/o3JK4qkjlH1WOYLBDnhePkCXFtkwM3Yh9F1MySrN9RzUg3zrgEf+wsswgEO4xg QGWFhGinM6dlw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ohhoon Kwon , Ingo Molnar , "David S . Miller" , Christian Brauner , "Eric W . Biederman" , Alexey Dobriyan , Andrew Morton , Linus Torvalds , Sasha Levin , linux-fsdevel@vger.kernel.org Subject: [PATCH AUTOSEL 5.14 19/25] connector: send event on write to /proc/[pid]/comm Date: Mon, 13 Sep 2021 18:33:33 -0400 Message-Id: <20210913223339.435347-19-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210913223339.435347-1-sashal@kernel.org> References: <20210913223339.435347-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ohhoon Kwon [ Upstream commit c2f273ebd89a79ed87ef1025753343e327b99ac9 ] While comm change event via prctl has been reported to proc connector by 'commit f786ecba4158 ("connector: add comm change event report to proc connector")', connector listeners were missing comm changes by explicit writes on /proc/[pid]/comm. Let explicit writes on /proc/[pid]/comm report to proc connector. Link: https://lkml.kernel.org/r/20210701133458epcms1p68e9eb9bd0eee8903ba26679a37d9d960@epcms1p6 Signed-off-by: Ohhoon Kwon Cc: Ingo Molnar Cc: David S. Miller Cc: Christian Brauner Cc: Eric W. Biederman Cc: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- fs/proc/base.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/proc/base.c b/fs/proc/base.c index e5b5f7709d48..533d5836eb9a 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -95,6 +95,7 @@ #include #include #include +#include #include #include "internal.h" #include "fd.h" @@ -1674,8 +1675,10 @@ static ssize_t comm_write(struct file *file, const char __user *buf, if (!p) return -ESRCH; - if (same_thread_group(current, p)) + if (same_thread_group(current, p)) { set_task_comm(p, buffer); + proc_comm_connector(p); + } else count = -EINVAL; -- 2.30.2