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Date:      Wed, 08 Jan 2020 18:59:57 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 243196] [PowerPC64] panic unloading geom driver
Message-ID:  <bug-243196-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243196

            Bug ID: 243196
           Summary: [PowerPC64] panic unloading geom driver
           Product: Base System
           Version: CURRENT
          Hardware: powerpc
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: alfredo.junior@eldorado.org.br

I hit a kernel panic when unloading some geom drivers on a PowerPC64 QEMU
virtual machine:


[root@alfredo-2 /boot/kernel]# kldload geom_*
[root@alfredo-2 /boot/kernel]# kldunload geom_*
panic: Assertion g_journal_switcher_proc !=3D NULL failed at
/usr/src/sys/geom/journal/g_journal.c:2970
cpuid =3D 15
time =3D 1578519766
KDB: stack backtrace:
0xe0000000641650f0: at kdb_backtrace+0x60
0xe000000064165200: at vpanic+0x1d8
0xe0000000641652b0: at panic+0x40
0xe0000000641652e0: at g_journal_fini+0x268
0xe000000064165390: at g_modevent+0x394
0xe000000064165430: at module_unload+0x70
0xe000000064165470: at linker_file_unload+0x290
0xe000000064165530: at kern_kldunload+0x148
0xe0000000641655e0: at sys_kldunloadf+0x34
0xe000000064165610: at trap+0xd58
0xe000000064165750: at powerpc_interrupt+0x1b8
0xe0000000641657e0: user SC trap by 0x810132350: srr1=3D0x800000000200f032
            r1=3D0x3fffffffffffcef0 cr=3D0x42820b80 xer=3D0 ctr=3D0x8101323=
40
r2=3D0x8102d2378 frame=3D0xe000000064165810
KDB: enter: panic
[ thread pid 40190 tid 100614 ]
Stopped at      kdb_enter+0x78: ori     r0, r0, 0x0



FreeBSD  13.0-CURRENT FreeBSD 13.0-CURRENT #0 r356261: Thu Jan  2 05:59:33 =
UTC
2020=20=20=20=20
root@releng1.nyi.freebsd.org:/usr/obj/usr/src/powerpc.powerpc64/sys/GENERIC=
64=20
powerpc

--=20
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