Date: Fri, 24 Jun 2005 12:51:03 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Thierry Herbelot <thierry@herbelot.com> Cc: freebsd-current@freebsd.org Subject: Re: panic: Memory modified after free Message-ID: <20050624165103.GA36147@xor.obsecurity.org> In-Reply-To: <200506241737.56466.thierry@herbelot.com> References: <200506241626.57469.thierry@herbelot.com> <20050624150350.GA3256@xor.obsecurity.org> <200506241737.56466.thierry@herbelot.com>
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[-- Attachment #1 --] On Fri, Jun 24, 2005 at 05:37:55PM +0200, Thierry Herbelot wrote: > Le Friday 24 June 2005 17:03, Kris Kennaway a ?crit : > > On Fri, Jun 24, 2005 at 04:26:55PM +0200, Thierry Herbelot wrote: > > > This is with an SMP machine (oldish BP6) > > > > Looks like you forgot to include the full panic...wasn't there a "last > > used by FOO" also displayed? If so, you should configure > > DEBUG_MEMGUARD to watch this malloc type (some assembly required, but > > it's pretty straightforward -- see Bosko Milekic's post to this > > mailing list when he committed support describing how to do it) and > > try to replicate the panic. > > sorry if I forgot anything : > this is the only message I had on the serial console : > > [traditional dmesg startup messages] > > Local package initialization:. > Additional TCP options:. > Starting background file system checks in 60 seconds. > > Fri Jun 24 09:10:10 CEST 2005 > > FreeBSD/i386 (multi-cur.herbelot.nom) (ttyd0) > > login: Jun 24 09:11:02 multi-cur su: thierry.herbelot to root on /dev/ttyp0 > panic: Memory modified after free 0xc15c1400(256) val=0 @ 0xc15c1400 Sorry, you're right..this is probably related to Mike's recent commit that adds debugging and catches a new class of error. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCvDn2Wry0BWjoQKURAgzTAKC0Ph8ZsBytGZ6jahKuaZQ10IsP6QCgnsTx kBl9iq1ifJeSZLpWd9ryHHg= =BkYQ -----END PGP SIGNATURE-----
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