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Date:      Tue, 27 Aug 2024 13:39:48 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 281035] agp driver kernel panic on 14.1 - agp_close(): page fault while in kernel mode
Message-ID:  <bug-281035-227-qgpZoJcOvZ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-281035-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-281035-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D281035

--- Comment #2 from Franco Fichtner <franco@opnsense.org> ---
(kgdb) frame 18
#18 agp_close (kdev=3D<optimized out>, fflag=3D<optimized out>, devtype=3D<=
optimized
out>, td=3D<optimized out>) at /usr/src/sys/dev/agp/agp.c:840
840                             AGP_UNBIND_MEMORY(dev, mem);
(kgdb) p dev
$1 =3D (device_t) 0xfffff800045d3000
(kgdb) p mem
$2 =3D (struct agp_memory *) 0xfffff800045d2600
(kgdb) p *dev
$3 =3D {ops =3D 0xfffff80004892900, link =3D {tqe_next =3D 0xf5c00000000000=
18, tqe_prev
=3D 0x0}, devlink =3D {tqe_next =3D 0x0, tqe_prev =3D 0xfffff800045d3018}, =
parent =3D
0x1, children =3D {
    tqh_first =3D 0xfffff800045e7800, tqh_last =3D 0xfffff800045e7400}, dri=
ver =3D
0xffffffff811ece77, devclass =3D 0x1030000, unit =3D 0, nameunit =3D 0x0,=20
  desc =3D 0x10000000 <error: Cannot access memory at address 0x10000000>, =
busy =3D
76113856, state =3D 4294965248, devflags =3D 0, flags =3D 2047, order =3D 8=
388608,
ivars =3D 0x10000,=20
  softc =3D 0xfffff800045d2700, sysctl_ctx =3D {tqh_first =3D 0x0, tqh_last=
 =3D
0xfffff80004892b00}, sysctl_tree =3D 0xfffff80004892880}
(kgdb) p *mem
$4 =3D {am_link =3D {tqe_next =3D 0xfffff80004768000, tqe_prev =3D 0xfffff8=
00045d2500},
am_id =3D 73213704, am_size =3D 18446735277689742592, am_type =3D 73213720,=
 am_obj =3D
0xfffff800045d2800,=20
  am_physical =3D 18446735277689745920, am_offset =3D 18446735277689745672,
am_is_bound =3D -2119914208}

--=20
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