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From: Lubomir Rintel <lkundrak@v3.sk>
To: linux-fsdevel@vger.kernel.org
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Subject: 4.2: Can't mount sysfs in a mount ns & user ns
Date: Thu, 13 Aug 2015 09:53:16 +0200	[thread overview]
Message-ID: <1439452396.23299.33.camel@v3.sk> (raw)

Hi,

4.0.6-300.fc22.x86_64:
[lkundrak@fedora22-1 ~]$ unshare -r --mount --net
[root@fedora22-1 ~]# mount --make-slave /sys
[root@fedora22-1 ~]# mount -t sysfs sysfs /sys
[root@fedora22-1 ~]# 

4.2.0-0.rc6.git0.1.fc24.x86_64:
[lkundrak@fedora23-1 ~]$ unshare -r --mount --net
[root@fedora23-1 ~]# mount --make-slave /sys
[root@fedora23-1 ~]# mount -t sysfs sysfs /sys
mount: permission denied
[root@fedora23-1 ~]#

we use this in NetworkManager test suite, to ensure the devices we see
via GUdev are the same as we see via rtnetlink.

I'm wondering if this is a bug or an intended change?

Thanks,
Lubo 

             reply	other threads:[~2015-08-13  8:02 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-13  7:53 Lubomir Rintel [this message]
2015-08-13 15:20 ` 4.2: Can't mount sysfs in a mount ns & user ns Eric W. Biederman
2015-08-13 16:07   ` Lubomir Rintel
2015-08-13 16:17     ` Eric W. Biederman
2015-08-14 13:21       ` [PATCH] kdbus: create /sys/fs/kdbus with sysfs_create_mount_point() Lubomir Rintel
2015-08-17 17:23         ` David Herrmann
2015-08-17 20:52           ` Josh Boyer

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