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Re: [PATCH -tip tracing/kprobes 6/6] kprobes: Prohibit to probe native_get_debugreg
- From: Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>
- To: Masami Hiramatsu <mhiramat at redhat dot com>
- Cc: Frederic Weisbecker <fweisbec at gmail dot com>, Ingo Molnar <mingo at elte dot hu>, lkml<linux-kernel at vger dot kernel dot org>, systemtap<systemtap at sources dot redhat dot com>, DLE<dle-develop at lists dot sourceforge dot net>
- Date: Fri, 28 Aug 2009 10:11:35 +0530
- Subject: Re: [PATCH -tip tracing/kprobes 6/6] kprobes: Prohibit to probe native_get_debugreg
- References: <20090827152539.GE6058@nowhere> <20090827172332.8246.34194.stgit@localhost.localdomain>
- Reply-to: ananth at in dot ibm dot com
On Thu, Aug 27, 2009 at 01:23:32PM -0400, Masami Hiramatsu wrote:
> Since do_debug() calls get_debugreg(), native_get_debugreg() will be called
> from singlestepping. This can cause an int3 infinit loop.
>
> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
> Cc: Frederic Weisbecker <fweisbec@gmail.com>
> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
> Cc: Ingo Molnar <mingo@elte.hu>
> ---
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>