Date: Sun, 22 Jan 2006 15:12:33 -0500 From: Kris Kennaway <kris@obsecurity.org> To: current@FreeBSD.org Subject: Re: memory corruption in recent -current? Message-ID: <20060122201233.GA59053@xor.obsecurity.org> In-Reply-To: <20060122194129.GZ69162@funkthat.com> References: <20060122194129.GZ69162@funkthat.com>
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--mP3DRpeJDSE+ciuQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Jan 22, 2006 at 11:41:29AM -0800, John-Mark Gurney wrote: > I've been working on a BT878 audio driver (first crack is available > in p4), and with a recent -current (you can sync to my -current as > it's the one in my workspace, jmg_carbon), I get memory corruption: > Memory modified after free 0xc2fb1050(12) val=3D1c @ 0xc2fb1050 > panic: Most recently used by ioctlops > or: > Memory modified after free 0xc2ba2b90(12) val=3D1c @ 0xc2ba2b90 > panic: Most recently used by Unitno >=20 > I went back to a kerenl that is pre-Dec 21st, and I haven't had a single > panic yet. I will admit I haven't done a builtworld between the these > two (the last buildworld matched with the pre-Dec 21st kernel)... I am > using kld modules for my testing, so I was building modules against an > old world, but I don't know of anything that has changed that would > cause problems.. >=20 > Anyone else seeing this? Use memguard to track down the cause. Kris --mP3DRpeJDSE+ciuQ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFD0+cwWry0BWjoQKURArF1AKDw0PDjCugWDWu+g/NdB0QratpWGgCdHi/L r/WiJfqnoCNlpgvHOAcv34o= =NVRM -----END PGP SIGNATURE----- --mP3DRpeJDSE+ciuQ--
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