linux-kernel - Re: [PATCH -tip ] [BUGFIX] kprobes: Move hash

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Message-ID: <84li9ke88w.fsf@sauna.l.org>
Date:	Mon, 18 Mar 2013 22:57:35 +0200
From:	Timo Juhani Lindfors <timo.lindfors@....fi>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Nadia Yvette Chambers <nyc@...omorphy.com>,
	yrl.pp-manager.tt@...achi.com,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH -tip ] [BUGFIX] kprobes: Move hash_64() into .text.kprobe section

Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> writes:
> Thank you for reporting!!

Thanks for fixing these! I spent some time trying to automate the
process of finding sensitive functions and eventually resorted into
booting a kvm instance with a minimal initrd to test every single
function in a clean and reproducible environment.

I found 7 more cases where calling register_kprobe() leads to an instant
kernel panic:

__flush_tlb_single
native_flush_tlb
native_safe_halt
native_set_pgd
native_set_pmd
native_set_pud
native_write_cr0

You can see full kernel console output for each function at
http://lindi.iki.fi/lindi/linux/kprobes/panics_2013-03-18/
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