Date: Sun, 24 Dec 2017 15:16:59 +0100 From: Dimitry Andric <dimitry@andric.com> To: David Wolfskill <david@catwhisker.org> Cc: current <current@freebsd.org>, Warner Losh <imp@bsdimp.com> Subject: Re: Panic @ orm_identify+0x308 (kernel probes) after r327103 -> r327140 Message-ID: <FC1A3E5C-2B7E-42EF-BAE1-09DC96179F4B@andric.com> In-Reply-To: <20171224132710.GN1555@albert.catwhisker.org> References: <20171224132710.GN1555@albert.catwhisker.org>
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On 24 Dec 2017, at 14:27, David Wolfskill <david@catwhisker.org> wrote:
>
> Had this on the laptop; fotunately, also got it on the build machine (as
> it's a lot easier to work with the serial console of the latter for
> this -- and it runs a GENERIC kernel):
...
> Fatal trap 9: general protection fault while in kernel mode
> cpuid = 2; apic id = 02
> instruction pointer = 0x20:0xffffffff81066968
> stack pointer = 0x28:0xffffffff82286a90
> frame pointer = 0x28:0xffffffff82286ad0
> code segment = base 0x0, limit 0xfffff, type 0x1b
> = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags = interrupt enabled, resume, IOPL = 0
> current process = 0 (swapper)
> [ thread pid 0 tid 100000 ]
> Stopped at orm_identify+0x308: movq (%r14),%rax
> db> bt
> Tracing pid 0 tid 100000 td 0xffffffff81e94340
> orm_identify() at orm_identify+0x308/frame 0xffffffff82286ad0
> bus_generic_probe() at bus_generic_probe+0x74/frame 0xffffffff82286b00
> isa_probe_children() at isa_probe_children+0x19/frame 0xffffffff82286b50
> mi_startup() at mi_startup+0x9c/frame 0xffffffff82286b70
> btext() at btext+0x2c
Since there is "isa" in the backtrace, I would consider r327120 ("Warn
when nonPNP ISA devices are attached in GENERIC that they are being
removed from GENERIC in 12") by Warner suspect...
Specifically, this change:
https://svnweb.freebsd.org/base/head/sys/x86/isa/orm.c?r1=327120&r2=327119&pathrev=327120
-Dimitry
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