Date: Wed, 1 Feb 2006 09:47:56 +0100 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-current@freebsd.org, Steve Kargl <sgk@troutmask.apl.washington.edu> Subject: Re: panic: Memory modified after free Message-ID: <20060201084756.GA764@garage.freebsd.pl> In-Reply-To: <20060131224721.GA16866@xor.obsecurity.org> References: <20060131212209.GA870@troutmask.apl.washington.edu> <20060131215021.GG4395@haakonia.hitnet.RWTH-Aachen.DE> <20060131220828.GA2953@garage.freebsd.pl> <20060131224721.GA16866@xor.obsecurity.org>
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--pf9I7BMVVzbSWLtt Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jan 31, 2006 at 05:47:21PM -0500, Kris Kennaway wrote: +> On Tue, Jan 31, 2006 at 11:11:20PM +0100, Pawel Jakub Dawidek wrote: +> > On Tue, Jan 31, 2006 at 10:50:21PM +0100, Christian Brueffer wrote: +> > +> On Tue, Jan 31, 2006 at 01:22:09PM -0800, Steve Kargl wrote: +> > +> > The system is a dual proc Tyan K8S Pro with 12 GB of memory. +> > +> > The kernel is UP. This was recorded by hand. I have the crash du= mp. +> > +> >=20 +> > +> > Memory modified after free 0xffffff02505e0c00(504) val=3Ddeadc0dd= @ +> > +> > 0xffffff02505e0cd0 +> > +> >=20 +> > +>=20 +> > +> For the record, I got this as well today. Here it was on my notebo= ok +> > +> at system shutdown. +> >=20 +> > Cool, so you have a chance to try memguard(9) and verify my patch to +> > manual page:) +> >=20 +> > --- memguard.9 30 Dec 2005 12:28:19 -0000 1.2 +> > +++ memguard.9 31 Jan 2006 22:06:04 -0000 +> > @@ -56,6 +56,9 @@ vm.memguard.desc=3D<memory_type> +> > .Ed +> > .Pp +> > Where memory_type is a short description of memory type to monitor. +> > +The short description of memory type is the second argument to +> > +.Xr MALLOC_DECLARE 9 , +> > +so one has to find it in the kernel source. +>=20 +> ITYM MALLOC_DEFINE? Yes, DEFINE. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --pf9I7BMVVzbSWLtt Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFD4HW7ForvXbEpPzQRAgc3AKCUfTLQHdBwei5COrN6NKGncjhg2gCfWcJB 1cMEmDBnIgyOIh9HNFkDefE= =CUVH -----END PGP SIGNATURE----- --pf9I7BMVVzbSWLtt--
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