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Date:      Tue, 3 Dec 2019 11:47:37 +0100
From:      peter.blok@bsd4all.org
To:        FreeBSD Stable <freebsd-stable@freebsd.org>
Subject:   panic when stopping jails
Message-ID:  <74BFA719-C09A-47C7-89F9-B7F9DF6B1EF7@bsd4all.org>

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Hi,

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.

Any pointers how to debug are welcome. Crash dump is available.

Peter


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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