linux-kernel - Re: [RFC PATCH v1.9 07/14] x86/stacktrace: add function for detecting reliable stack traces

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Date:	Fri, 8 Apr 2016 10:24:15 +0200
From:	Petr Mladek <pmladek@...e.com>
To:	Josh Poimboeuf <jpoimboe@...hat.com>
Cc:	Jiri Kosina <jikos@...nel.org>, Jessica Yu <jeyu@...hat.com>,
	Miroslav Benes <mbenes@...e.cz>, linux-kernel@...r.kernel.org,
	live-patching@...r.kernel.org, Vojtech Pavlik <vojtech@...e.com>
Subject: Re: [RFC PATCH v1.9 07/14] x86/stacktrace: add function for
 detecting reliable stack traces

On Thu 2016-04-07 09:46:55, Josh Poimboeuf wrote:
> On Thu, Apr 07, 2016 at 01:55:52PM +0200, Petr Mladek wrote:
> > Well, I wonder if we should be more suspicious and make
> > sure that only the regular process stack is used.
> 
> Notice the save_stack_stack_reliable() function, which is called by
> dump_trace() when the task is running on an interrupt or exception
> stack.  It returns -EINVAL, so the stack gets marked unreliable.  Does
> that address your concern, or did you mean something else?

I see. It does what I wanted.

Thanks,
Petr