From: Andi Kleen <ak@linux.intel.com>
To: John Wood <john.wood@gmx.com>
Cc: Kees Cook <keescook@chromium.org>, Jann Horn <jannh@google.com>,
Randy Dunlap <rdunlap@infradead.org>,
Jonathan Corbet <corbet@lwn.net>,
James Morris <jmorris@namei.org>, Shuah Khan <shuah@kernel.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-kselftest@vger.kernel.org,
kernel-hardening@lists.openwall.com
Subject: Re: [PATCH v5 7/8] Documentation: Add documentation for the Brute LSM
Date: Thu, 11 Mar 2021 12:08:11 -0800 [thread overview]
Message-ID: <20210311200811.GH203350@tassilo.jf.intel.com> (raw)
In-Reply-To: <20210311182252.GA3349@ubuntu>
> When a brute force attack is detected through the fork or execve system call,
> all the tasks involved in the attack will be killed with the exception of the
> init task (task with pid equal to zero). Now, and only if the init task is
> involved in the attack, block the fork system call from the init process during
> a user defined time (using a sysctl attribute). This way the brute force attack
> is mitigated and the system does not panic.
That means nobody can log in and fix the system during that time.
Would be better to have that policy in init. Perhaps add some way
that someone doing wait*() can know the exit was due this mitigation
(and not something way) Then they could disable respawning of that daemon.
-Andi
next prev parent reply other threads:[~2021-03-11 20:08 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-27 15:30 [PATCH v5 0/8] Fork brute force attack mitigation John Wood
2021-02-27 15:30 ` [PATCH v5 1/8] security: Add LSM hook at the point where a task gets a fatal signal John Wood
2021-02-27 15:30 ` [PATCH v5 2/8] security/brute: Define a LSM and manage statistical data John Wood
2021-03-02 5:49 ` [security/brute] cfe92ab6a3: WARNING:inconsistent_lock_state kernel test robot
2021-03-02 18:39 ` John Wood
2021-02-27 15:30 ` [PATCH v5 3/8] securtiy/brute: Detect a brute force attack John Wood
2021-02-27 15:30 ` [PATCH v5 4/8] security/brute: Fine tuning the attack detection John Wood
2021-02-27 15:30 ` [PATCH v5 5/8] security/brute: Mitigate a brute force attack John Wood
2021-03-11 20:32 ` peter enderborg
2021-03-12 16:19 ` John Wood
2021-02-27 15:30 ` [PATCH v5 6/8] selftests/brute: Add tests for the Brute LSM John Wood
2021-02-27 15:30 ` [PATCH v5 7/8] Documentation: Add documentation " John Wood
2021-02-28 18:56 ` Andi Kleen
2021-03-02 18:31 ` John Wood
2021-03-07 15:19 ` Andi Kleen
2021-03-07 16:45 ` John Wood
2021-03-07 17:25 ` Andi Kleen
2021-03-07 18:05 ` John Wood
2021-03-07 22:49 ` Andi Kleen
2021-03-09 18:40 ` John Wood
2021-03-11 18:22 ` John Wood
2021-03-11 20:08 ` Andi Kleen [this message]
2021-03-12 17:47 ` John Wood
2021-03-11 20:05 ` Andi Kleen
2021-03-12 17:54 ` John Wood
2021-02-27 15:30 ` [PATCH v5 8/8] MAINTAINERS: Add a new entry " John Wood
2021-02-27 18:44 ` [PATCH v5 0/8] Fork brute force attack mitigation John Wood
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=20210311200811.GH203350@tassilo.jf.intel.com \
--to=ak@linux.intel.com \
--cc=corbet@lwn.net \
--cc=gregkh@linuxfoundation.org \
--cc=jannh@google.com \
--cc=jmorris@namei.org \
--cc=john.wood@gmx.com \
--cc=keescook@chromium.org \
--cc=kernel-hardening@lists.openwall.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=rdunlap@infradead.org \
--cc=serge@hallyn.com \
--cc=shuah@kernel.org \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).