Date: Fri, 23 May 2003 23:38:22 +0900 From: Jun Kuriyama <kuriyama@imgsrc.co.jp> To: Current <freebsd-current@FreeBSD.org> Cc: sos@FreeBSD.org Subject: Re: Panic in _mtx_lock_flags+0x40 Message-ID: <7mfzn5k9sx.wl@black.imgsrc.co.jp> In-Reply-To: <XFMail.20030522123313.jhb@FreeBSD.org> References: <7mllwzlu0u.wl@black.imgsrc.co.jp> <XFMail.20030522123313.jhb@FreeBSD.org>
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At Thu, 22 May 2003 16:35:33 +0000 (UTC),
John Baldwin wrote:
> > db> trace
> > _mtx_lock_flags(0,0,c0401b81,11d,e11edb18) at _mtx_lock_flags+0x40
>=20
> Trying to lock a NULL pointer is definitely going to panic, yes.
> I'm curious what vm_fault() line you are at.
>=20
> > vm_fault(c082f000,deadc000,1,0,c3affab0) at vm_fault+0x2cc
> > trap_pfault(e11edc10,0,deadc0de,cf74d400,deadc0de) at trap_pfault+0x161
> > trap(c0410018,10,c03e0010,c7a73c9c,c7e8f600) at trap+0x3ad
> > calltrap() at calltrap+0x5
> > --- trap 0xc, eip =3D 0xc015c580, esp =3D 0xe11edc50, ebp =3D 0xe11edc6=
8 ---
> > ad_detach(c7a73c9c,ffffffff,c03d5de3,0,1) at ad_detach+0x40
>=20
> The real bug is probably here, probably a NULL pointer dereference.
> I would use gdb to figure out what this file:line is and send the
> report to S=F8ren.
>=20
> > ata_reinit(c7a73c00,cacf5100,c03d1747,0,0) at ata_reinit+0x9b
> > ad_timeout(cacf5100,0,c03ec2fe,bf,4feaef) at ad_timeout+0x136
> > softclock(0,0,c03e9271,233,c3afe780) at softclock+0x19c
> > ithread_loop(c3afd200,e11edd48,c03e9122,2f8,0) at ithread_loop+0x182
> > fork_exit(c021bab0,c3afd200,e11edd48) at fork_exit+0xc0
> > fork_trampoline() at fork_trampoline+0x1a
> > --- trap 0x1, eip =3D 0, esp =3D 0xe11edd7c, ebp =3D 0 ---
Is this help you?
(kgdb) l *ad_detach+0x40
0xc015c580 is in ad_detach (../../../dev/ata/ata-disk.c:218).
213 =20
214 atadev->flags |=3D ATA_D_DETACHING;
215 ata_prtdev(atadev, "removed from configuration\n");
216 ad_invalidatequeue(adp, NULL);
217 TAILQ_FOREACH(request, &atadev->channel->ata_queue, chain) {
218 if (request->softc !=3D adp)
219 continue;
220 TAILQ_REMOVE(&atadev->channel->ata_queue, request, chain);
221 biofinish(request->bp, NULL, ENXIO);
222 ad_free(request);
--=20
Jun Kuriyama <kuriyama@imgsrc.co.jp> // IMG SRC, Inc.
<kuriyama@FreeBSD.org> // FreeBSD Project
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