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Date:      Thu, 26 Dec 2013 10:07:35 -0800
From:      "R. Tyler Croy" <tyler@monkeypox.org>
To:        freebsd-stable@freebsd.org
Subject:   Panic while mounting msdosfs on -PRERELEASE (r259490)
Message-ID:  <20131226180735.GA2259@kiwi>

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At the time of the crash I was on wireless, playing some music and the SD c=
ard
that I was attempting to mount had been inserted since before my last
sleep/resume cycle.

After reboot I was not able to immediately reproduce the issue. I'll try ag=
ain
after some sleep/resume cycles when I get a chance.

    Dec 26 09:56:40 kiwi kernel:=20
    Dec 26 09:56:40 kiwi kernel:=20
    Dec 26 09:56:40 kiwi kernel: Fatal trap 12: page fault while in kernel =
mode
    Dec 26 09:56:40 kiwi kernel: cpuid =3D 0; apic id =3D 00
    Dec 26 09:56:40 kiwi kernel: fault virtual address      =3D 0x167a358d
    Dec 26 09:56:40 kiwi kernel: fault code         =3D supervisor write da=
ta, page not present
    Dec 26 09:56:40 kiwi kernel: instruction pointer        =3D 0x20:0xffff=
ffff806c2c01
    Dec 26 09:56:40 kiwi kernel: stack pointer              =3D 0x28:0xffff=
fe0234b677d0
    Dec 26 09:56:40 kiwi kernel: frame pointer              =3D 0x28:0xffff=
fe0234b67790
    Dec 26 09:56:40 kiwi kernel: code segment               =3D base 0x0, l=
imit 0xfffff, type 0x1b
    Dec 26 09:56:40 kiwi kernel: =3D DPL 0, pres 1, long 1, def32 0, gran 1
    Dec 26 09:56:40 kiwi kernel: processor eflags   =3D interrupt enabled, =
resume, IOPL =3D 0
    Dec 26 09:56:40 kiwi kernel: current process            =3D 389 (mount_=
msdosfs)
    Dec 26 09:56:40 kiwi kernel: trap number                =3D 12
    Dec 26 09:56:40 kiwi kernel: panic: page fault
    Dec 26 09:56:40 kiwi kernel: cpuid =3D 0
    Dec 26 09:56:40 kiwi kernel: KDB: stack backtrace:
    Dec 26 09:56:40 kiwi kernel: #0 0xffffffff8066bd50 at kdb_backtrace+0x60
    Dec 26 09:56:40 kiwi kernel: #1 0xffffffff80633835 at panic+0x155
    Dec 26 09:56:40 kiwi kernel: #2 0xffffffff808cd572 at trap_fatal+0x3a2
    Dec 26 09:56:40 kiwi kernel: #3 0xffffffff808cd849 at trap_pfault+0x2c9
    Dec 26 09:56:40 kiwi kernel: #4 0xffffffff808ccfd6 at trap+0x5e6
    Dec 26 09:56:40 kiwi kernel: #5 0xffffffff808b4272 at calltrap+0x8
    Dec 26 09:56:40 kiwi kernel: Uptime: 1d3h30m27s
    Dec 26 09:56:40 kiwi kernel: Automatic reboot in 15 seconds - press a k=
ey on the console to abort
    Dec 26 09:56:40 kiwi kernel: Rebooting...

Cheers
- R. Tyler Croy
------------------
   Code: https://github.com/rtyler
Chatter: https://twitter.com/agentdero
         rtyler@jabber.org


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