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Date:      Thu, 14 Jul 2016 14:38:15 -0400
From:      Allan Jude <allanjude@freebsd.org>
To:        "Oleg V. Nauman" <oleg@opentransfer.com>, freebsd-current@freebsd.org
Subject:   Re: CURRENT: frequent crashes if mpd5 is running
Message-ID:  <24373448-44df-0072-0289-351fbf069b93@freebsd.org>
In-Reply-To: <2010863.QW57ajHvRt@asus.theweb.org.ua>
References:  <2010863.QW57ajHvRt@asus.theweb.org.ua>

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From: Allan Jude <allanjude@freebsd.org>
To: "Oleg V. Nauman" <oleg@opentransfer.com>, freebsd-current@freebsd.org
Message-ID: <24373448-44df-0072-0289-351fbf069b93@freebsd.org>
Subject: Re: CURRENT: frequent crashes if mpd5 is running
References: <2010863.QW57ajHvRt@asus.theweb.org.ua>
In-Reply-To: <2010863.QW57ajHvRt@asus.theweb.org.ua>

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On 2016-07-14 13:13, Oleg V. Nauman wrote:
>  I'm experiencing frequent CURRENT ( 12.0-CURRENT r302535 amd64 ) crash=
es=20
> triggered by mpd5:
>=20
> Fatal trap 12: page fault while in kernel mode
> cpuid =3D 0; apic id =3D 00
> fault virtual address   =3D 0x10
> fault code              =3D supervisor read data, page not present
> instruction pointer     =3D 0x20:0xffffffff814f6162
> stack pointer           =3D 0x28:0xfffffe011b06d640
> frame pointer           =3D 0x28:0xfffffe011b06d670
> 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 901 (mpd5)
> trap number             =3D 12
> panic: page fault
> cpuid =3D 0
>=20
> #0  doadump (textdump=3D<value optimized out>) at pcpu.h:221
> 221     pcpu.h: No such file or directory.
>         in pcpu.h
> (kgdb) #0  doadump (textdump=3D<value optimized out>) at pcpu.h:221
> #1  0xffffffff80749169 in kern_reboot (howto=3D260)
>     at ../../../kern/kern_shutdown.c:366
> #2  0xffffffff807496e1 in vpanic (fmt=3D<value optimized out>,
>     ap=3D<value optimized out>) at ../../../kern/kern_shutdown.c:759
> #3  0xffffffff80749553 in panic (fmt=3D0x0) at ../../../kern/kern_shutd=
own.c:690
> #4  0xffffffff80a5aca1 in trap_fatal (frame=3D0xfffffe011b06d590, eva=3D=
16)
>     at ../../../amd64/amd64/trap.c:841
> #5  0xffffffff80a5af51 in trap_pfault (frame=3D0x0, usermode=3D0)
>     at ../../../amd64/amd64/trap.c:716
> #6  0xffffffff80a5a430 in trap (frame=3D0xfffffe011b06d590)
>     at ../../../amd64/amd64/trap.c:442
> #7  0xffffffff80a3e161 in calltrap () at ../../../amd64/amd64/exception=
=2ES:236
> #8  0xffffffff814f6162 in ng_uncallout (c=3D0xfffff80004842460,
>     node=3D0xfffff80004c79a00)
>     at /usr/src/sys/modules/netgraph/netgraph/../../../netgraph/ng_base=
=2Ec:3815
> #9  0xffffffff8151bbab in ng_pptpgre_disconnect (hook=3D<value optimize=
d out>)
>     at=20
> /usr/src/sys/modules/netgraph/pptpgre/../../../netgraph/ng_pptpgre.c:96=
6
> #10 0xffffffff814f2928 in ng_destroy_hook (hook=3D0xfffff8000487ad80)
>     at /usr/src/sys/modules/netgraph/netgraph/../../../netgraph/ng_base=
=2Ec:1219
> #11 0xffffffff814f2635 in ng_rmnode (node=3D<value optimized out>,
>     dummy1=3D<value optimized out>, dummy2=3D<value optimized out>,
>     dummy3=3D<value optimized out>)
>     at /usr/src/sys/modules/netgraph/netgraph/../../../netgraph/ng_base=
=2Ec:744
> #12 0xffffffff814f4832 in ng_apply_item (node=3D0xfffff80004c79a00,
>     item=3D0xfffff80004e72600, rw=3D1)
>     at /usr/src/sys/modules/netgraph/netgraph/../../../netgraph/ng_base=
=2Ec:2523
> #13 0xffffffff814f41a3 in ng_snd_item (item=3D<value optimized out>,
>     flags=3D<value optimized out>)
>     at /usr/src/sys/modules/netgraph/netgraph/../../../netgraph/ng_base=
=2Ec:2320
> #14 0xffffffff814eec4e in ngc_send (so=3D<value optimized out>,
>     flags=3D<value optimized out>, m=3D<value optimized out>,
>     addr=3D<value optimized out>, control=3D<value optimized out>,
>     td=3D<value optimized out>)
>     at /usr/src/sys/modules/netgraph/socket/../../../netgraph/ng_socket=
=2Ec:338
> #15 0xffffffff807dee17 in sosend_generic (so=3D<value optimized out>,
>     addr=3D<value optimized out>, uio=3D<value optimized out>,
>     top=3D<value optimized out>, control=3D<value optimized out>,
>     flags=3D<value optimized out>, td=3D<value optimized out>)
>     at ../../../kern/uipc_socket.c:1359
> #16 0xffffffff807e66b8 in kern_sendit (td=3D<value optimized out>,
>     s=3D<value optimized out>, mp=3D<value optimized out>, flags=3D0, c=
ontrol=3D0x0,
>     segflg=3D<value optimized out>) at ../../../kern/uipc_syscalls.c:84=
8
> #17 0xffffffff807e6abf in sendit (td=3D0xfffff800047caa00,
>     s=3D<value optimized out>, mp=3D0xfffffe011b06da60,
>     flags=3D<value optimized out>) at ../../../kern/uipc_syscalls.c:775=

> #18 0xffffffff807e690d in sys_sendto (td=3D0x0, uap=3D<value optimized =
out>)
>     at ../../../kern/uipc_syscalls.c:899
> #19 0xffffffff80a5b618 in amd64_syscall (td=3D<value optimized out>, tr=
aced=3D0)
>     at subr_syscall.c:135
> #20 0xffffffff80a3e44b in Xfast_syscall ()
>     at ../../../amd64/amd64/exception.S:396
> #21 0x00000008025d284a in ?? ()
> Previous frame inner to this frame (corrupt stack?)
> Current language:  auto; currently minimal
>=20
> _______________________________________________
> freebsd-current@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.o=
rg"
>=20

There is a patch for this issue:

https://reviews.freebsd.org/D7209

You might try seeing if it solves your problem, and reporting that to
the author

--=20
Allan Jude


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