From: Alexey Gladkov <gladkov.alexey@gmail.com>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Linux FS Devel <linux-fsdevel@vger.kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Alexey Dobriyan <adobriyan@gmail.com>,
Alexey Gladkov <legion@kernel.org>,
Andy Lutomirski <luto@kernel.org>,
"Eric W . Biederman" <ebiederm@xmission.com>,
Kees Cook <keescook@chromium.org>
Subject: [PATCH 0/2] proc: use subset option to hide some top-level procfs entries
Date: Thu, 4 Jun 2020 22:04:11 +0200 [thread overview]
Message-ID: <20200604200413.587896-1-gladkov.alexey@gmail.com> (raw)
Greetings!
Preface
-------
This patch set can be applied over:
git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git d35bec8a5788
Overview
--------
Directories and files can be created and deleted by dynamically loaded modules.
Not all of these files are virtualized and safe inside the container.
However, subset=pid is not enough because many containers wants to have
/proc/meminfo, /proc/cpuinfo, etc. We need a way to limit the visibility of
files per procfs mountpoint.
Introduced changes
------------------
Allow to specify the names of files and directories in the subset= parameter and
thereby make a whitelist of top-level permitted names.
Alexey Gladkov (2):
proc: use subset option to hide some top-level procfs entries
docs: proc: update documentation about subset= parameter
Documentation/filesystems/proc.rst | 6 +++
fs/proc/base.c | 15 +++++-
fs/proc/generic.c | 75 +++++++++++++++++++++------
fs/proc/inode.c | 18 ++++---
fs/proc/internal.h | 12 +++++
fs/proc/root.c | 81 ++++++++++++++++++++++++------
include/linux/proc_fs.h | 11 ++--
7 files changed, 175 insertions(+), 43 deletions(-)
--
2.25.4
next reply other threads:[~2020-06-04 20:04 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-04 20:04 Alexey Gladkov [this message]
2020-06-04 20:04 ` [PATCH 1/2] proc: use subset option to hide some top-level procfs entries Alexey Gladkov
2020-06-05 2:19 ` kernel test robot
2020-06-05 2:19 ` [PATCH] proc: fix boolreturn.cocci warnings kernel test robot
2020-06-04 20:04 ` [PATCH 2/2] docs: proc: update documentation about subset= parameter Alexey Gladkov
2020-06-04 20:33 ` [PATCH 0/2] proc: use subset option to hide some top-level procfs entries Eric W. Biederman
2020-06-04 21:32 ` Christian Brauner
2020-06-05 0:28 ` Alexey Gladkov
2020-06-05 0:08 ` Alexey Gladkov
2020-06-05 4:17 ` Eric W. Biederman
2020-06-05 14:47 ` Alexey Gladkov
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