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Date:      Tue, 3 Dec 2019 11:57:41 +0100
From:      peter.blok@bsd4all.org
To:        FreeBSD Stable <freebsd-stable@freebsd.org>
Subject:   Re: panic when stopping jails
Message-ID:  <1D8CFDE4-D146-4275-8253-D48BE441B58A@bsd4all.org>
In-Reply-To: <74BFA719-C09A-47C7-89F9-B7F9DF6B1EF7@bsd4all.org>
References:  <74BFA719-C09A-47C7-89F9-B7F9DF6B1EF7@bsd4all.org>

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Forgot to mention that it is a very recent 12-STABLE and I don=E2=80=99t =
suspect any recent commits. It is just that jails are now stopped more =
often.


> On 3 Dec 2019, at 11:47, peter.blok@bsd4all.org wrote:
>=20
> Hi,
>=20
> I=E2=80=99m getting the following panic when stopping jais. When =
ifunit_ref iterates over the VNET ifnet=E2=80=99s it gets a bad ifp. =
I=E2=80=99m using netgrapg bridge=E2=80=99s.
>=20
> Any pointers how to debug are welcome. Crash dump is available.
>=20
> Peter
>=20
>=20
> Fatal trap 9: general protection fault while in kernel mode
> cpuid =3D 3; apic id =3D 03
> instruction pointer	=3D 0x20:0xffffffff807377c5
> stack pointer	        =3D 0x28:0xfffffe00d1e90870
> frame pointer	        =3D 0x28:0xfffffe00d1e90870
> 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 8537 (ifconfig)
> trap number		=3D 9
> panic: general protection fault
> cpuid =3D 3
> time =3D 1575297301
> KDB: stack backtrace:
> #0 0xffffffff8069a8d7 at kdb_backtrace+0x67
> #1 0xffffffff8064ec6d at vpanic+0x19d
> #2 0xffffffff8064eac3 at panic+0x43
> #3 0xffffffff809e450c at trap_fatal+0x39c
> #4 0xffffffff809e395a at trap+0x6a
> #5 0xffffffff809be97c at calltrap+0x8
> #6 0xffffffff80750ff1 at ifunit_ref+0x51
> #7 0xffffffff8075328c at ifioctl+0x47c
> #8 0xffffffff806b8b2e at kern_ioctl+0x2be
> #9 0xffffffff806b87fd at sys_ioctl+0x15d
> #10 0xffffffff809e50a2 at amd64_syscall+0x362
> #11 0xffffffff809bf2b0 at fast_syscall_common+0x101
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