Date: Tue, 12 Apr 2005 08:59:19 -0700 (PDT) From: Doug White <dwhite@gumbysoft.com> To: David O'Brien <obrien@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: [PANIC] vm? vfs? Message-ID: <20050412085900.Y2178@carver.gumbysoft.com> In-Reply-To: <20050411032558.GA1406@dragon.NUXI.org> References: <20050411032558.GA1406@dragon.NUXI.org>
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pseudoterminals. Join the ptcread/write panic club. :-)
On Sun, 10 Apr 2005, David O'Brien wrote:
> FreeBSD 6.0-CURRENT FreeBSD 6.0-CURRENT #0: Tue Apr 5 12:19:35 PDT 2005
>
> GNU gdb 20040810 [GDB v6.x for FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you =
are
> welcome to change it and/or distribute copies of it under certain conditi=
ons.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for detail=
s.
> This GDB was configured as "i386-portbld-freebsd6.0"...
> panic: page fault
> panic messages:
> ---
> Fatal trap 12: page fault while in kernel mode
> cpuid =3D 1; apic id =3D 01
> fault virtual address=09=3D 0x0
> fault code=09=09=3D supervisor read, page not present
> instruction pointer=09=3D 0x8:0xc063596a
> stack pointer=09 =3D 0x10:0xf04e9b64
> frame pointer=09 =3D 0x10:0xf04e9b90
> code segment=09=09=3D base 0x0, limit 0xfffff, type 0x1b
> =09=09=09=3D DPL 0, pres 1, def32 1, gran 1
> processor eflags=09=3D interrupt enabled, resume, IOPL =3D 0
> current process=09=09=3D 1062 (xterm-static)
> trap number=09=09=3D 12
> panic: page fault
> cpuid =3D 1
> KDB: stack backtrace:
> kdb_backtrace(c067f02d,1,c065a072,f04e9a88,c344a730) at 0xc04f910e =3D kd=
b_backtrace+0x2e
> panic(c065a072,c0680005,f04e9b24,1,1) at 0xc04dc508 =3D panic+0x128
> trap_fatal(f04e9b24,0,c06801e7,2c3,c344a730) at 0xc0637a84 =3D trap_fatal=
+0x304
> trap_pfault(f04e9b24,0,0,f04e9b1c,0) at 0xc0637758 =3D trap_pfault+0x1b8
> trap(18,10,10,f04e9bac,0) at 0xc0637340 =3D trap+0x350
> calltrap() at 0xc062408a =3D calltrap+0x5
> --- trap 0xc, eip =3D 0xc063596a, esp =3D 0xf04e9b64, ebp =3D 0xf04e9b90 =
---
> generic_bcopy(c37d2038,f04e9bac,64,808cc30,c06b92a0) at 0xc063596a =3D ge=
neric_bcopy+0x1a
> ptcread(c33f1500,f04e9c80,4,3ae,1000) at 0xc0518d95 =3D ptcread+0x185
> devfs_read_f(c380a360,f04e9c80,c3395880,0,c344a730) at 0xc049a806 =3D dev=
fs_read_f+0xa6
> dofileread(c344a730,c380a360,4,8085c20,1000) at 0xc0504aa2 =3D dofileread=
+0xc2
> read(c344a730,f04e9d14,c,3ff,3) at 0xc050490b =3D read+0x6b
> syscall(2f,2f,2f,8085c20,80a0084) at 0xc0637de2 =3D syscall+0x2b2
> Xint0x80_syscall() at 0xc06240df =3D Xint0x80_syscall+0x1f
> --- syscall (3, FreeBSD ELF32, read), eip =3D 0x28382edf, esp =3D 0xbfbfe=
66c, ebp =3D 0xbfbfe698 ---
> Uptime: 1d8h49m32s
> Dumping 1536 MB
> [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [=
CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] 16[CTRL-C to abort] [=
CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTR=
L-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] 32[CTR=
L-C to abort] [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] 48[CTR=
L-C to abort] 64 80[CTRL-C to abort] 96 112 128 144 160 176 192 208 224 2=
40 256 272 288 304 320 336 352 368 384 400 416 432 448 464 480 496 512 528 =
544 560 576 592 608 624 640 656 672 688 704 720 736 752 768 784 800 816 832=
848 864 880 896 912 928 944 960 976 992 1008 1024 1040 1056 1072 1088 1104=
1120 1136 1152 1168 1184 1200 1216 1232 1248 1264 1280 1296 1312 1328 1344=
1360 1376 1392 1408 1424 1440 1456 1472 1488 1504 1520
> ---
> #0 doadump () at pcpu.h:164
> 164=09=09__asm __volatile("movl %%fs:0,%0" : "=3Dr" (td));
> doadump () at pcpu.h:164
> 164=09=09__asm __volatile("movl %%fs:0,%0" : "=3Dr" (td));
> (kgdb) where
> #0 doadump () at pcpu.h:164
> #1 0xc04dc1d2 in boot (howto=3D260) at ../../../kern/kern_shutdown.c:398
> #2 0xc04dc583 in panic (fmt=3D0xc065a072 "%s")
> at ../../../kern/kern_shutdown.c:554
> #3 0xc0637a84 in trap_fatal (frame=3D0xf04e9b24, eva=3D0)
> at ../../../i386/i386/trap.c:806
> #4 0xc0637758 in trap_pfault (frame=3D0xf04e9b24, usermode=3D0, eva=3D0)
> at ../../../i386/i386/trap.c:724
> #5 0xc0637340 in trap (frame=3D
> {tf_fs =3D 24, tf_es =3D 16, tf_ds =3D 16, tf_edi =3D -263283796, t=
f_esi =3D 0, tf_ebp =3D -263283824, tf_isp =3D -263283888, tf_ebx =3D 38, t=
f_edx =3D 0, tf_ecx =3D 9, tf_eax =3D -263283796, tf_trapno =3D 12, tf_err =
=3D 0, tf_eip =3D -1067230870, tf_cs =3D 8, tf_eflags =3D 66071, tf_esp =3D=
-1015209928, tf_ss =3D 128})
> at ../../../i386/i386/trap.c:414
> #6 0xc062408a in calltrap () at ../../../i386/i386/exception.s:139
> #7 0x00000018 in ?? ()
> #8 0x00000010 in ?? ()
> #9 0x00000010 in ?? ()
> #10 0xf04e9bac in ?? ()
> #11 0x00000000 in ?? ()
> #12 0xf04e9b90 in ?? ()
> #13 0xf04e9b50 in ?? ()
> #14 0x00000026 in ?? ()
> #15 0x00000000 in ?? ()
> #16 0x00000009 in ?? ()
> #17 0xf04e9bac in ?? ()
> #18 0x0000000c in ?? ()
> #19 0x00000000 in ?? ()
> #20 0xc063596a in generic_bcopy () at ../../../i386/i386/support.s:489
> ---Type <return> to continue, or q <return> to quit---
> #21 0xc37d2038 in ?? ()
> #22 0x00000080 in ?? ()
> #23 0xc05199fa in q_to_b (clistp=3D0xc063596a,
> dest=3D0xf04e9bac "\r\n/FBSD: write failed, filesystem is \025?=C3`=
=A3\200=C3=F0\233N=F0=EA\003K=C0=A0\222k=C0", amount=3D100) at ../../../ker=
n/tty_subr.c:290
> #24 0xc0518d95 in ptcread (dev=3D0x0, uio=3D0xf04e9c80, flag=3D4) at libk=
ern.h:56
> #25 0xc049a806 in devfs_read_f (fp=3D0xc380a360, uio=3D0xf04e9c80,
> cred=3D0xc3395880, flags=3D0, td=3D0xc344a730)
> at ../../../fs/devfs/devfs_vnops.c:943
> #26 0xc0504aa2 in dofileread (td=3D0xc344a730, fp=3D0xc380a360, fd=3D0, b=
uf=3D0x0,
> nbyte=3D3228113056, offset=3DUnhandled dwarf expression opcode 0x93
> ) at file.h:234
> #27 0xc050490b in read (td=3D0xc344a730, uap=3D0xf04e9d14)
> at ../../../kern/sys_generic.c:107
> #28 0xc0637de2 in syscall (frame=3D
> {tf_fs =3D 47, tf_es =3D 47, tf_ds =3D 47, tf_edi =3D 134765600, tf=
_esi =3D 134873220, tf_ebp =3D -1077942632, tf_isp =3D -263283340, tf_ebx =
=3D 0, tf_edx =3D 0, tf_ecx =3D 4, tf_eax =3D 3, tf_trapno =3D 0, tf_err =
=3D 2, tf_eip =3D 674770655, tf_cs =3D 31, tf_eflags =3D 642, tf_esp =3D -1=
077942676, tf_ss =3D 47})
> at ../../../i386/i386/trap.c:951
> #29 0xc06240df in Xint0x80_syscall () at ../../../i386/i386/exception.s:2=
00
> #30 0x0000002f in ?? ()
> #31 0x0000002f in ?? ()
> #32 0x0000002f in ?? ()
> #33 0x08085c20 in ?? ()
> #34 0x080a0084 in ?? ()
> #35 0xbfbfe698 in ?? ()
> #36 0xf04e9d74 in ?? ()
> #37 0x00000000 in ?? ()
> #38 0x00000000 in ?? ()
> ---Type <return> to continue, or q <return> to quit---
> #39 0x00000004 in ?? ()
> #40 0x00000003 in ?? ()
> #41 0x00000000 in ?? ()
> #42 0x00000002 in ?? ()
> #43 0x28382edf in ?? ()
> #44 0x0000001f in ?? ()
> #45 0x00000282 in ?? ()
> #46 0xbfbfe66c in ?? ()
> #47 0x0000002f in ?? ()
> #48 0x28184f96 in ?? ()
> #49 0x28184fa6 in ?? ()
> #50 0x28184fb6 in ?? ()
> #51 0x28184fc6 in ?? ()
> #52 0x49eee000 in ?? ()
> #53 0xc350a5f4 in ?? ()
> #54 0xc344a730 in ?? ()
> #55 0xf04e99b0 in ?? ()
> #56 0xf04e9990 in ?? ()
> #57 0xc2bc4a10 in ?? ()
> #58 0xc04efda0 in sched_switch (td=3D0x80a0084, newtd=3D0x0, flags=3D---C=
an't read userspace from dump, or kernel process---
>
> )
> at ../../../kern/sched_4bsd.c:963
> Previous frame inner to this frame (corrupt stack?)
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--=20
Doug White | FreeBSD: The Power to Serve
dwhite@gumbysoft.com | www.FreeBSD.org
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