linux-kernel - Re: [PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist

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:	Thu, 21 Nov 2013 08:29:38 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	"Frank Ch. Eigler" <fche@...hat.com>, linux-arch@...r.kernel.org,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Sandeepa Prabhu <sandeepa.prabhu@...aro.org>, x86@...nel.org,
	lkml <linux-kernel@...r.kernel.org>,
	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>,
	virtualization@...ts.linux-foundation.org,
	systemtap@...rceware.org, "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and
 general cleaning of kprobe blacklist


* Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> wrote:

> (2013/11/21 2:36), Frank Ch. Eigler wrote:

[ ... ]
> > one needs to resort to something like:
> > 
> > # cat /proc/kallsyms | grep ' [tT] ' | while read addr type symbol; do
> >    perf probe $symbol
> > done
> > 
> > then wait for a few hours for that to finish. Then, or while the loop
> > is still running, run
> > 
> > # perf record -e 'probe:*' -aR sleep 1
> > 
> > to take a kernel down.
> 
> Um, indeed, current blacklist is not perfect. [...]

Then it needs to be fixed ASAP!

> [...] As I reported in this series, I've found 2 more patterns. I 
> guess there still have some others.
> 
> But anyway, I don't think it is good to fix all such bugs in this 
> series.

Fixing these bugs is far more important than any cleanup work.

We can apply the fixes together with your cleanup series to make it 
all simpler, but the bug fixing absolutely needs to happen right now.

Thanks,

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/