Date: Tue, 24 Jan 2006 09:03:55 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Kris Kennaway <kris@obsecurity.org>, current@FreeBSD.org Subject: Re: memory corruption in recent -current? Message-ID: <20060124140354.GB66330@xor.obsecurity.org> In-Reply-To: <20060124082755.GB69162@funkthat.com> References: <20060122194129.GZ69162@funkthat.com> <20060122201233.GA59053@xor.obsecurity.org> <20060124082755.GB69162@funkthat.com>
index | next in thread | previous in thread | raw e-mail
[-- Attachment #1 --] On Tue, Jan 24, 2006 at 12:27:55AM -0800, John-Mark Gurney wrote: > Kris Kennaway wrote this message on Sun, Jan 22, 2006 at 15:12 -0500: > > 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=1c @ 0xc2fb1050 > > > panic: Most recently used by ioctlops > > > or: > > > Memory modified after free 0xc2ba2b90(12) val=1c @ 0xc2ba2b90 > > > panic: Most recently used by Unitno > > > > > > 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.. > > > > > > Anyone else seeing this? > > > > Use memguard to track down the cause. > > Well, looks like memguard is broken? I just ran it, and got this > panic: I run it on a number of my 'production' machines, so I don't think it can be this broken everywhere. Perhaps it's interacting badly with your code :( Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFD1jPKWry0BWjoQKURAtiJAJ0ergNBFBvhfmvc+Q4WqamSkGT6cQCgiFMp yAX6v5iT3khZ9eq3wislSD8= =Tgi3 -----END PGP SIGNATURE-----help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060124140354.GB66330>