lkml.org 
[lkml]   [2021]   [Sep]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH AUTOSEL 5.14 19/25] connector: send event on write to /proc/[pid]/comm
    Date
    From: Ohhoon Kwon <ohoono.kwon@samsung.com>

    [ 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 <ohoono.kwon@samsung.com>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: David S. Miller <davem@davemloft.net>
    Cc: Christian Brauner <christian.brauner@ubuntu.com>
    Cc: Eric W. Biederman <ebiederm@xmission.com>
    Cc: Alexey Dobriyan <adobriyan@gmail.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    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 <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;

    --
    2.30.2
    \
     
     \ /
      Last update: 2021-09-14 00:37    [W:4.001 / U:0.268 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site