linux-kernel - Re: 2.6.36-rc5-mmotm0928 BUG while trying to ptrace a process

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Message-ID: <1286372708.2144.183.camel@laptop>
Date:	Wed, 06 Oct 2010 15:45:08 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Valdis.Kletnieks@...edu
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	linux-kernel@...r.kernel.org, fweisbec <fweisbec@...il.com>
Subject: Re: 2.6.36-rc5-mmotm0928 BUG while trying to ptrace a process

On Wed, 2010-10-06 at 05:32 -0400, Valdis.Kletnieks@...edu wrote:
> Dell Latitude E6500,  Intel Core2 Duo P8700 CPU.
> 
> Have seen this three times now while trying to attach gdb to a hung Firefox
> process.
> 
> [20669.480674] BUG: unable to handle kernel NULL pointer dereference at 0000000000000100
> [20669.480682] IP: [<ffffffff810b8275>] __reserve_bp_slot+0x56/0x17d

Known issue I think, Frederic was looking into curing this.

Frederic, what's the current status of that?
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