linux-kernel - Re: [PATCH v4] Fix INT1 Recursion with unregistered breakpoints

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Message-ID: <1450578711.3793.8.camel@gmail.com>
Date:	Sun, 20 Dec 2015 03:31:51 +0100
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Jeff Merkey <linux.mdb@...il.com>, linux-kernel@...r.kernel.org
Cc:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, peterz@...radead.org, luto@...nel.org
Subject: Re: [PATCH v4] Fix INT1 Recursion with unregistered breakpoints

On Sat, 2015-12-19 at 19:13 -0700, Jeff Merkey wrote:

> @@ -519,6 +528,18 @@ static int hw_breakpoint_handler(struct die_args
> *args)
>  	    (dr6 & (~DR_TRAP_BITS)))
>  		rc = NOTIFY_DONE;
>  
> +	/*
> +	* if we are about to signal to
> +	* do_debug() to stop further processing
> +	* and we have not ascertained the source
> +	* of the breakpoint, log it as spurious.
> +	*/

Ahem...


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