Date: Mon, 9 Sep 2013 14:57:44 -0400 From: "J.R. Oldroyd" <fbsd@opal.com> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-acpi@freebsd.org Subject: Re: panic after acpi suspend/resume 9.1, 9.2rc3 Message-ID: <20130909145744.63fcba85@shibato> In-Reply-To: <201309091122.30193.jhb@freebsd.org> References: <20130908172454.15812086@shibato> <201309091122.30193.jhb@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
--Sig_/EUJJhy2sFqpOzmZwydjaLl0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: quoted-printable
On Mon, 9 Sep 2013 11:22:29 -0400 John Baldwin <jhb@freebsd.org> wrote:
>
> > Fatal trap 12: page fault while in kernel mode
> > cpuid =3D 0; apic id =3D 00
> > fault virtual address =3D 0x0
> > fault code =3D supervisor write data, page not present
> > instruction pointer =3D 0x20:0xffffffff80ceddcd
> > stack pointer =3D 0x28:0xffffff80dbfe25e0
> > frame pointer =3D 0x28:0xffffff80dbfe2660
> > code segment =3D base 0x0, limit 0xfffff, type 0x1b
> > =3D DPL 0, pres 1, long 1, def32 0, gran 1
> > processor eflags =3D interrupt enabled, resume, IOPL =3D 0
> > current process =3D 52022 (firefox)
> > trap number =3D 12
> > panic: page fault
> > cpuid =3D 0
> > KDB: stack backtrace:
> > #0 0xffffffff80947986 at kdb_backtrace+0x66
> > #1 0xffffffff8090d9ae at panic+0x1ce
> > #2 0xffffffff80cf1db0 at trap_fatal+0x290
> > #3 0xffffffff80cf2111 at trap_pfault+0x211
> > #4 0xffffffff80cf26c4 at trap+0x344
> > #5 0xffffffff80cdb9f3 at calltrap+0x8
> > #6 0xffffffff80b797a7 at vm_fault_hold+0x1b87
>=20
> This is where the NULL pointer is. Frame 9 (listed below) is above this.
>=20
> > (kgdb) list *0xffffffff80ceddcd
> > 0xffffffff80ceddcd is in pmap_enter (../../../amd64/amd64/pmap.c:3577).
> > 3572 if ((m->oflags & VPO_UNMANAGED) =3D=3D 0) {
> > 3573 newpte |=3D PG_MANAGED;
> > 3574 pv =3D get_pv_entry(pmap, &lock);
> > 3575 pv->pv_va =3D va;
> > 3576 CHANGE_PV_LIST_LOCK_TO_PHYS(&lock, pa);
> > 3577 TAILQ_INSERT_TAIL(&m->md.pv_list, pv, pv_list);
> > 3578 if ((newpte & PG_RW) !=3D 0)
> > 3579 vm_page_aflag_set(m, PGA_WRITEABLE);
> > 3580 }
> > 3581
>=20
> So it seems like pv_list of a page might be busted? Can you try looking =
at
> the disassembly to see if you can find 'm' in one of the registers?
>=20
Sure, here you go...
(kgdb) print m
$1 =3D 0xfffffe00b260b430
(kgdb) print m->md.pv_list
$4 =3D {tqh_first =3D 0x0, tqh_last =3D 0x0}
(kgdb) print pv
$2 =3D 0xfffffe0095088ad8
(kgdb) print pv_list
No symbol "pv_list" in current context.
(kgdb) info registers
rax 0x1 1
rbx 0xfffffe0095088ae0 -2196522890528
rcx 0x0 0
rdx 0xfffffe00b260b430 -2196030573520
rsi 0x0 0
rdi 0x153 339
rbp 0xffffff80dbfe2660 0xffffff80dbfe2660
rsp 0xffffff80dbfe25f0 0xffffff80dbfe25f0
r8 0x0 0
r9 0x827689000 35020902400
r10 0x63 99
r11 0xfffffe00b260b430 -2196030573520
r12 0x47f 1151
r13 0xfffffe00862458d8 -2196772726568
r14 0xfffffe0092907448 -2196564315064
r15 0xfffffe0095088ad8 -2196522890536
rip 0xffffffff80ceddcd 0xffffffff80ceddcd <pmap_enter+1709>
eflags 0x10202 66050
cs 0x20 32
ss 0x0 0
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
--Sig_/EUJJhy2sFqpOzmZwydjaLl0
Content-Type: application/pgp-signature; name=signature.asc
Content-Disposition: attachment; filename=signature.asc
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (FreeBSD)
iEUEARECAAYFAlIuGisACgkQls33urr0k4mOdgCdGKN1VVwYKDEe9z0s7mFQRpXH
fc8AmJ07mKw+RsSBOSvfoKoldf8zWWU=
=XhJe
-----END PGP SIGNATURE-----
--Sig_/EUJJhy2sFqpOzmZwydjaLl0--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20130909145744.63fcba85>