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]

Message-ID: <20131120153801.GA9743@gmail.com>
Date:	Wed, 20 Nov 2013 16:38:01 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	"Frank Ch. Eigler" <fche@...hat.com>
Cc:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.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


* Frank Ch. Eigler <fche@...hat.com> wrote:

> masami.hiramatsu.pt wrote:
> 
> > [...]  This series also includes a change which prohibits probing 
> > on the address in .entry.text because the code is used for very 
> > low-level sensitive interrupt/syscall entries. Probing such code 
> > may cause unexpected result (actually most of that area is already 
> > in the kprobe blacklist).  So I've decide to prohibit probing all 
> > of them. [...]
> 
> Does this new blacklist cover enough that the kernel now survives a 
> broadly wildcarded perf-probe, e.g. over e.g. all of its kallsyms?

That's generally the purpose of the annotations - if it doesn't then 
that's a bug.

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/