linux-kernel - Re: [PATCH][kprobes] support kretprobe-blacklist

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Message-ID: <20070827133154.GA22322@infradead.org>
Date:	Mon, 27 Aug 2007 14:31:54 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, ananth@...ibm.com,
	prasanna@...ibm.com, anil.s.keshavamurthy@...el.com,
	Jim Keniston <jkenisto@...ibm.com>, davem@...emloft.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH][kprobes] support kretprobe-blacklist

On Fri, Aug 17, 2007 at 03:43:04PM -0400, Masami Hiramatsu wrote:
> This patch introduces architecture dependent kretprobe
> blacklists to prohibit users from inserting return
> probes on the function in which kprobes can be inserted
> but kretprobes can not.

I don't like this at all.  If people want to shoot themselves into
their own foot using kernel modules they have an unlimited number
of ways to do this, and even more with kprobes, so there's no point
in making it a little harder for some cases.

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