linux-arch.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "Frank Ch. Eigler" <fche@redhat.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
	linux-arch@vger.kernel.org,
	Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
	Sandeepa Prabhu <sandeepa.prabhu@linaro.org>,
	x86@kernel.org, lkml <linux-kernel@vger.kernel.org>,
	"Steven Rostedt (Red Hat)" <rostedt@goodmis.org>,
	virtualization@lists.linux-foundation.org,
	systemtap@sourceware.org, "David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist
Date: Wed, 20 Nov 2013 12:36:00 -0500	[thread overview]
Message-ID: <20131120173600.GK8993@redhat.com> (raw)
In-Reply-To: <20131120153801.GA9743@gmail.com>

Hi -

> > 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.

AFAIK, no kernel since kprobes was introduced has ever stood up to
that test.  perf probe lacks the wildcarding powers of systemtap, so
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.


- FChE

  parent reply	other threads:[~2013-11-20 17:36 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-11-20  4:21 [PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist Masami Hiramatsu
2013-11-20  4:21 ` Masami Hiramatsu
2013-11-20  4:21 ` [PATCH -tip v3 01/23] kprobes: Prohibit probing on .entry.text code Masami Hiramatsu
2013-11-20  4:21   ` Masami Hiramatsu
2013-11-20  4:21 ` [PATCH -tip v3 02/23] kprobes: Introduce NOKPROBE_SYMBOL() macro for blacklist Masami Hiramatsu
2013-11-20  4:21   ` Masami Hiramatsu
2013-11-27 13:32   ` Ingo Molnar
2013-11-27 13:32     ` Ingo Molnar
2013-11-28  7:56     ` Masami Hiramatsu
2013-11-20  4:21 ` [PATCH -tip v3 03/23] kprobes: Show blacklist entries via debugfs Masami Hiramatsu
2013-11-20  4:21 ` [PATCH -tip v3 04/23] kprobes: Support blacklist functions in module Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 05/23] kprobes: Use NOKPROBE_SYMBOL() in sample modules Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 06/23] kprobes/x86: Allow probe on some kprobe preparation functions Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 07/23] kprobes/x86: Use NOKPROBE_SYMBOL instead of __kprobes Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 08/23] kprobes: Allow probe on some kprobe functions Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 09/23] kprobes: Use NOKPROBE_SYMBOL macro instead of __kprobes Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 10/23] ftrace/kprobes: Allow probing on some preparation functions Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 11/23] ftrace/kprobes: Use NOKPROBE_SYMBOL macro in ftrace Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 12/23] x86/hw_breakpoint: Use NOKPROBE_SYMBOL macro in hw_breakpoint Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 13/23] x86/trap: Use NOKPROBE_SYMBOL macro in trap.c Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-22 21:21   ` Andi Kleen
2013-11-23 12:11     ` Masami Hiramatsu
2013-11-27  1:38     ` Masami Hiramatsu
2013-11-27  1:38       ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 14/23] x86/fault: Use NOKPROBE_SYMBOL macro in fault.c Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 15/23] x86/alternative: Use NOKPROBE_SYMBOL macro in alternative.c Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 16/23] x86/nmi: Use NOKPROBE_SYMBOL macro for nmi handlers Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 17/23] x86/kvm: Use NOKPROBE_SYMBOL macro in kvm.c Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 18/23] x86/dumpstack: Use NOKPROBE_SYMBOL macro in dumpstack.c Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-21 11:30   ` Ingo Molnar
2013-11-21 11:30     ` Ingo Molnar
2013-11-22  2:08     ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 19/23] [BUGFIX] kprobes/x86: Prohibit probing on debug_stack_* Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 20/23] [BUGFIX] kprobes: Prohibit probing on func_ptr_is_kernel_text Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 21/23] notifier: Use NOKPROBE_SYMBOL macro in notifier Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 22/23] sched: Use NOKPROBE_SYMBOL macro in sched Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20  4:22 ` [PATCH -tip v3 23/23] kprobes/x86: Use kprobe_blacklist for .kprobes.text and .entry.text Masami Hiramatsu
2013-11-20  4:22   ` Masami Hiramatsu
2013-11-20 14:26 ` [PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist Frank Ch. Eigler
2013-11-20 15:38   ` Ingo Molnar
2013-11-20 15:38     ` Ingo Molnar
2013-11-20 17:36     ` Frank Ch. Eigler [this message]
2013-11-20 17:56       ` Steven Rostedt
2013-11-20 18:09         ` Josh Stone
2013-11-21  2:14       ` Masami Hiramatsu
2013-11-21  2:14         ` Masami Hiramatsu
2013-11-21  7:29         ` Ingo Molnar
2013-11-22  2:35           ` Masami Hiramatsu
2013-11-22  2:35             ` Masami Hiramatsu
2013-11-22 11:46             ` Masami Hiramatsu
2013-11-27 13:30               ` Ingo Molnar
2013-11-27 13:30                 ` Ingo Molnar
2013-11-28 10:43                 ` Masami Hiramatsu
2013-11-30 13:46                   ` Ingo Molnar
2013-12-01  2:16                     ` Masami Hiramatsu
2013-12-01  2:16                       ` Masami Hiramatsu

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=20131120173600.GK8993@redhat.com \
    --to=fche@redhat.com \
    --cc=ananth@in.ibm.com \
    --cc=davem@davemloft.net \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=masami.hiramatsu.pt@hitachi.com \
    --cc=mingo@kernel.org \
    --cc=rostedt@goodmis.org \
    --cc=sandeepa.prabhu@linaro.org \
    --cc=systemtap@sourceware.org \
    --cc=virtualization@lists.linux-foundation.org \
    --cc=x86@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).