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Date:      Sun, 15 Dec 2024 23:17:10 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 267028] kernel panics when booting with both (zfs,ko or vboxnetflt,ko or acpi_wmi.ko) and amdgpu.ko
Message-ID:  <bug-267028-3630-zTb0dV6Hno@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-267028-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-267028-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D267028

--- Comment #237 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Mark Millard from comment #235)

Old comments that reference one or both of:

0xFFFFF80000000000 (also  known as 18446735277616529408)
0xFFFFF80000000007

comment #44
comment #94
comment #148

Example from 44 (that 94 references):

#8  vtozoneslab (va=3D18446735277616529408, zone=3D<optimized out>,=20
    slab=3D<optimized out>) at /usr/src/sys/vm/uma_int.h:635
#9  free (addr=3D0xfffff80000000007, mtp=3D0xffffffff824332b0 <M_SOLARIS>)
    at /usr/src/sys/kern/kern_malloc.c:911
#10 0xffffffff8214d251 in nv_mem_free (nvp=3D<optimized out>,=20
    buf=3D0xfffff80000000007, size=3D16688648)
    at /usr/src/sys/contrib/openzfs/module/nvpair/nvpair.c:216

Example from 148 (an nfsd process context):

#7  0xffffffff80c895cb in atomic_fcmpset_long (src=3D18446741877726026240,=
=20
    dst=3D<optimized out>, expect=3D<optimized out>)
    at /usr/src/sys/amd64/include/atomic.h:225
#8  selfdfree (stp=3Dstp@entry=3D0xfffff80012aa8080, sfp=3D0xfffff800000000=
07)
    at /usr/src/sys/kern/sys_generic.c:1755
#9  0xffffffff80c8866b in seltdclear (td=3Dtd@entry=3D0xfffffe00b52e9a00)
    at /usr/src/sys/kern/sys_generic.c:1967

[I'll note that 18446741877726026240 =3D 0xFFFFFE00B52E9A00 but is likely
from use of dereferencing something based on the 0xfffff80000000007 in
some way.]

The history suggests that 0xfffff80000000007 (or 0xfffff80000000000)
corruption is not limited to a specific place.

--=20
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