Date: Mon, 11 Sep 2006 12:01:18 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Kris Kennaway <kris@obsecurity.org> Cc: Alexander Leidinger <Alexander@Leidinger.net>, current@freebsd.org Subject: Re: panic: System call old.recv returning with 1 locks held Message-ID: <20060911100117.GA92022@garage.freebsd.pl> In-Reply-To: <20060910211556.GA9924@xor.obsecurity.org> References: <20060910194536.1b699733@Magellan.Leidinger.net> <20060910184359.GA7152@xor.obsecurity.org> <20060910230003.28fbc780@Magellan.Leidinger.net> <20060910211556.GA9924@xor.obsecurity.org>
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--OXfL5xGRrasGEqWY Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Sep 10, 2006 at 05:15:56PM -0400, Kris Kennaway wrote: > On Sun, Sep 10, 2006 at 11:00:03PM +0200, Alexander Leidinger wrote: > > Quoting Kris Kennaway <kris@obsecurity.org> (Sun, 10 Sep 2006 14:43:59 = -0400): > >=20 > > > Enable DEBUG_LOCKS and DEBUG_VFS_LOCKS then run 'show lockedvnods' > > > from DDB to find out where the lockmgr lock was acquired. > >=20 > > I've enabled them (and WITNESS, INVARIANTS and DIAGNOSTICS) and rebuild > > the kernel. Not much files where rebuild. >=20 > That's a warning sign; almost every file in the kernel should have > been rebuilt when you turned on WITNESS and INVARIANTS. Perhaps you > didn't run 'make depend'? >=20 > > show lockedvnods did not show any locks. >=20 > Odd, I thought your initial panic was from a held lockmgr lock, so it > should have showed up here. In HEAD (not sure if it was MFCed) jhb@ added code to track number of mutexes/sx-locks acquired/released. So bascially this panic can happen when you leak a lock of any kind. 'show alllocks' has to show them when the kernel (and modules) is compiled with WITNESS. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --OXfL5xGRrasGEqWY Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (FreeBSD) iD8DBQFFBTPtForvXbEpPzQRAg8nAKDwE3ouyO+VRPGlwpVo2kb6ojsyWgCdEuxZ Hm6amt0U6zzvWb8jUjIma5I= =cgtA -----END PGP SIGNATURE----- --OXfL5xGRrasGEqWY--
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