linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: 권오훈 <ohoono.kwon@samsung.com>
To: "mingo@kernel.org" <mingo@kernel.org>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"christian.brauner@ubuntu.com" <christian.brauner@ubuntu.com>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"ebiederm@xmission.com" <ebiederm@xmission.com>
Cc: 권오훈 <ohoono.kwon@samsung.com>,
	"ohkwon1043@gmail.com" <ohkwon1043@gmail.com>,
	"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: [PATCH] connector: send event on write to /proc/[pid]/comm
Date: Thu, 01 Jul 2021 22:34:58 +0900	[thread overview]
Message-ID: <20210701133458epcms1p68e9eb9bd0eee8903ba26679a37d9d960@epcms1p6> (raw)
In-Reply-To: <CGME20210701133458epcms1p68e9eb9bd0eee8903ba26679a37d9d960@epcms1p6>

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.

Signed-off-by: Ohhoon Kwon <ohoono.kwon@samsung.com>
---
 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 9cbd915025ad..3e1e6b56aa96 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -95,6 +95,7 @@
 #include <linux/posix-timers.h>
 #include <linux/time_namespace.h>
 #include <linux/resctrl.h>
+#include <linux/cn_proc.h>
 #include <trace/events/oom.h>
 #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;
 
-- 
2.17.1

       reply	other threads:[~2021-07-01 13:35 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20210701133458epcms1p68e9eb9bd0eee8903ba26679a37d9d960@epcms1p6>
2021-07-01 13:34 ` 권오훈 [this message]
2021-07-01 21:30   ` Eric W. Biederman
     [not found]   ` <CGME20210701133458epcms1p68e9eb9bd0eee8903ba26679a37d9d960@epcms1p2>
2021-07-08 12:23     ` 권오훈

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210701133458epcms1p68e9eb9bd0eee8903ba26679a37d9d960@epcms1p6 \
    --to=ohoono.kwon@samsung.com \
    --cc=akpm@linux-foundation.org \
    --cc=christian.brauner@ubuntu.com \
    --cc=davem@davemloft.net \
    --cc=ebiederm@xmission.com \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=ohkwon1043@gmail.com \
    --subject='Re: [PATCH] connector: send event on write to /proc/[pid]/comm' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
on how to clone and mirror all data and code used for this inbox