linux-kernel - Re: [PATCH 0/4] ftrace: One more check on x86 and some small fixes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 28 Jun 2016 15:17:56 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Petr Mladek <pmladek@...e.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Jiri Kosina <jkosina@...e.cz>, linux-kernel@...r.kernel.org,
	x86@...nel.org
Subject: Re: [PATCH 0/4] ftrace: One more check on x86 and some small fixes

On Mon, 27 Jun 2016 15:54:33 +0200
Petr Mladek <pmladek@...e.com> wrote:

> 1st patch adds one more paranoid check of the modified function on x86.
> 
> Plus there are 3 small changes that appeared when hunting down
> the 1st patch.
> 
> Petr Mladek (4):
>   ftrace/x86: Make sure to modify 5-bite instructions
>   ftrace/x86: Do not crash when reading wrong ftrace func

The first two are mostly just "detect error, when it happens again"
chanes.

>   ftrace: Always destroy trampoline when shutting down the trace
>   ftrace: Fixup trace_selftest_ops()

These two seem to fix real bugs. I'm thinking they should go in now and
be backported via stable.

Thoughts?

-- Steve

> 
>  arch/x86/kernel/ftrace.c      | 12 ++++++++-
>  kernel/trace/ftrace.c         | 62 ++++++++++++++++++++++---------------------
>  kernel/trace/trace_selftest.c |  7 ++---
>  3 files changed, 47 insertions(+), 34 deletions(-)
>