Date: Tue, 4 Dec 2012 10:56:29 -0500 From: John Baldwin <jhb@freebsd.org> To: Peter Wemm <peter@wemm.org> Cc: Tommy Sonne =?iso-8859-1?q?Alstr=F8m?= <tommy@anakin.ws>, freebsd-amd64@freebsd.org Subject: Re: amd64/173235: Have received two crashes within 1 day after installing new packages: Fatal trap 12: page fault in kernel mode Message-ID: <201212041056.29259.jhb@freebsd.org> In-Reply-To: <CAGE5yCq=tQTCPqrC=rxnvtT8zGn3k1Ey1Ljser%2BxiM4p=Mx3vQ@mail.gmail.com> References: <201210311250.q9VCo1Wx025049@freefall.freebsd.org> <509BF9ED.90205@FreeBSD.org> <CAGE5yCq=tQTCPqrC=rxnvtT8zGn3k1Ey1Ljser%2BxiM4p=Mx3vQ@mail.gmail.com>
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On Thursday, November 08, 2012 2:32:32 pm Peter Wemm wrote: > On Thu, Nov 8, 2012 at 10:29 AM, John Baldwin <jhb@freebsd.org> wrote: > > On 10/31/12 8:50 AM, Tommy Sonne Alstr=F8m wrote: > >> The following reply was made to PR amd64/173235; it has been noted by= =20 GNATS. > >> > >> From: =3D?ISO-8859-1?Q?Tommy_Sonne_Alstr=3DF8m?=3D <tommy@anakin.ws> > >> To: Andriy Gapon <avg@FreeBSD.org> > >> Cc: bug-followup@FreeBSD.org > >> Subject: Re: amd64/173235: Have received two crashes within 1 day afte= r=20 installing > >> new packages: Fatal trap 12: page fault in kernel mode > >> Date: Wed, 31 Oct 2012 13:44:01 +0100 > >> > >> I'm very sorry, I just realized that I copied the 1st readout twice. = The > >> 2nd readout was like this > >> > >> Fatal trap 12: page fault while in kernel mode > >> cpuid =3D 0; apic id =3D 00 > >> fault virtual address =3D 0x6 > >> fault code =3D supervisor read data, page not present > >> instruction pointer =3D 0x20:0xffffffff809da0cc > >> stack pointer =3D 0x28:0xffffff8451f549b0 > >> frame pointer =3D 0x28:0xffffff8451f54a40 > >> 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 1068 (named) > >> trap number =3D 12 > >> panic: page fault > >> cpuid =3D 0 > >> KDB: stack backtrace: > >> #0 0xffffffff808680fe at kdb_backtrace+0x5e > >> #1 0xffffffff80832cb7 at panic+0x187 > >> #2 0xffffffff80b185a0 at trap_fatal+0x290 > >> #3 0xffffffff80b188e9 at trap_pfault+0x1f9 > >> #4 0xffffffff80b18daf at trap+0x3df > >> #5 0xffffffff80b0324f at calltrap+0x8 > >> #6 0xffffffff809f75a7 at udp6_bind+0xa7 > >> #7 0xffffffff808a152e at kern_bind+0xde > >> #8 0xffffffff808a15a1 at sys_bind+0x41 > >> #9 0xffffffff80b17e90 at amd64_syscall+0x4e0 > >> #10 0xffffffff80b03537 at Xfast_syscall+0xf7 > >> Uptime: 9h41m13s > >> Dumping 3411 out of 16088 > >> MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91% > > > > Both of your panics involve faults where the bad pointer only has a > > single bit set. They are also in very different places. I suspect > > you are having a hardware failure (e.g. single-bit memory errors). >=20 > Which ones are you looking at? A fault va of 0x20 and 0x6 is what I'd > normally suspect of being a null pointer + structure member offset > dereference. I must have misparsed 0x6 as 0x8. =2D-=20 John Baldwin
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