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Re: [RFC] [PATCH 2.6.37-rc5-tip 11/20] 11: uprobes: slot allocation for uprobes
- From: Peter Zijlstra <peterz at infradead dot org>
- To: Srikar Dronamraju <srikar at linux dot vnet dot ibm dot com>
- Cc: Ingo Molnar <mingo at elte dot hu>, Steven Rostedt <rostedt at goodmis dot org>, Linux-mm <linux-mm at vger dot kernel dot org>, Arnaldo Carvalho de Melo <acme at infradead dot org>, Linus Torvalds <torvalds at linux-foundation dot org>, Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Christoph Hellwig <hch at infradead dot org>, Masami Hiramatsu <masami dot hiramatsu dot pt at hitachi dot com>, Oleg Nesterov <oleg at redhat dot com>, Andrew Morton <akpm at linux-foundation dot org>, SystemTap <systemtap at sources dot redhat dot com>, Jim Keniston <jkenisto at linux dot vnet dot ibm dot com>, Frederic Weisbecker <fweisbec at gmail dot com>, Andi Kleen <andi at firstfloor dot org>, LKML <linux-kernel at vger dot kernel dot org>, "Paul E. McKenney" <paulmck at linux dot vnet dot ibm dot com>
- Date: Tue, 25 Jan 2011 14:56:16 +0100
- Subject: Re: [RFC] [PATCH 2.6.37-rc5-tip 11/20] 11: uprobes: slot allocation for uprobes
- References: <20101216095714.23751.52601.sendpatchset@localhost6.localdomain6> <20101216095926.23751.9405.sendpatchset@localhost6.localdomain6>
On Thu, 2010-12-16 at 15:29 +0530, Srikar Dronamraju wrote:
> + /*
> + * We keep the vma's vm_start rather than a pointer to the vma
> + * itself. The probed process or a naughty kernel module could make
> + * the vma go away, and we must handle that reasonably gracefully.
> + */
> + unsigned long vaddr; /* Page(s) of instruction slots */
You could simply refuse to let the user unmap that area and rogue kernel
modules aren't something you can do anything about anyway.
But yeah..