Date: Tue, 12 Oct 2010 14:25:07 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: Andriy Gapon <avg@icyb.net.ua> Cc: freebsd-acpi@freebsd.org Subject: Re: MacBookPro 5,1 Message-ID: <201010121425.07279.hselasky@c2i.net> In-Reply-To: <4CB4434E.7020006@icyb.net.ua> References: <201010121209.06397.hselasky@c2i.net> <4CB4434E.7020006@icyb.net.ua>
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On Tuesday 12 October 2010 13:15:26 Andriy Gapon wrote:
> on 12/10/2010 13:09 Hans Petter Selasky said the following:
> > Hi,
> >
> > My MacBookPro 5,1 does not boot using -current because memory inside the
> > ACPI kernel module is used after free.
> >
> > The following patch temporily mitigates the problem:
> >
> > /usr/src/sys/dev/acpica/Osd/OsdMemory.c
> >
> > void
> > AcpiOsFree(void *Memory)
> > {
> > + if (cold == 0)
> >
> > free(Memory, M_ACPICA);
> >
> > }
> >
> > Is there any way to debug this from user-land?
>
> I think that the best way is to get a backtrace at least or better a
> crashdump.
The crashdump is not helpful. It crashes at init time, while the actual free
happens very early during boot.
--HPS
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