Date: Sat, 6 Jun 2009 10:58:11 +0400 From: georg@dts.su To: freebsd-questions@freebsd.org Subject: Re[2]: fatal trap 12 Message-ID: <15010736657.20090606105811@dts.su> In-Reply-To: <200906021459146250568@ec.com.cn> References: <200906021459146250568@ec.com.cn>
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Hello, Freebsd-questions.
After one of new crash I have this:
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This GDB was configured as "amd64-marcel-freebsd"...
Unread portion of the kernel message buffer:
Fatal trap 12: page fault while in kernel mode
cpuid =3D 2; apic id =3D 02
fault virtual address =3D 0x0
fault code =3D supervisor read data, page not present
instruction pointer =3D 0x8:0xffffffff804c4eb8
stack pointer =3D 0x10:0xffffff807a0478f0
frame pointer =3D 0x10:0xffffff807a047930
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 32668 (perl5.10.0)
Physical memory: 4082 MB
Dumping 1647 MB: 1632 1616 1600 1584 1568 1552 1536 1520 1504 1488 1472 145=
6 1440 1424 1408 1392 1376 1360 1344 1328 1312 1296 1280 1264 1248 1232 121=
6 1200 1184 1168 1152 1136 1120 1104 1088 1072 1056 1040 1024 1008 992 976 =
960 944 928 912 896 880 864 848 832 816 800 784 768 752 736 720 704 688 672=
656 640 624 608 592 576 560 544 528 512 496 480 464 448 432 416 400 384 36=
8 352 336 320 304 288 272 256 240 224 208 192 176 160 144 128 112 96 80 64 =
48 32 16
Reading symbols from /boot/kernel/accf_http.ko...Reading symbols from /boot=
/kernel/accf_http.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/accf_http.ko
#0 doadump () at pcpu.h:195
195 __asm __volatile("movq %%gs:0,%0" : "=3Dr" (td));
(kgdb) list *0xffffffff804c4eb8
0xffffffff804c4eb8 is in pfs_ioctl (/usr/src/sys/fs/pseudofs/pseudofs_vnops=
.c:265).
260 static int
261 pfs_ioctl(struct vop_ioctl_args *va)
262 {
263 struct vnode *vn =3D va->a_vp;
264 struct pfs_vdata *pvd =3D vn->v_data;
265 struct pfs_node *pn =3D pvd->pvd_pn;
266 struct proc *proc;
267 int error;
268
269 PFS_TRACE(("%s: %lx", pn->pn_name, va->a_command));
(kgdb) backtrace
#0 doadump () at pcpu.h:195
#1 0xffffffff801c8dac in db_fncall (dummy1=3DVariable "dummy1" is not avai=
lable.
) at /usr/src/sys/ddb/db_command.c:516
#2 0xffffffff801c92df in db_command (last_cmdp=3D0xffffffff80b30c88, cmd_t=
able=3D0x0, dopager=3D1) at /usr/src/sys/ddb/db_command.c:413
#3 0xffffffff801c94f0 in db_command_loop () at /usr/src/sys/ddb/db_command=
.c:466
#4 0xffffffff801cb0d9 in db_trap (type=3DVariable "type" is not available.
) at /usr/src/sys/ddb/db_main.c:228
#5 0xffffffff80554e55 in kdb_trap (type=3D12, code=3D0, tf=3D0xffffff807a0=
47840) at /usr/src/sys/kern/subr_kdb.c:524
#6 0xffffffff807fae80 in trap_fatal (frame=3D0xffffff807a047840, eva=3DVar=
iable "eva" is not available.
) at /usr/src/sys/amd64/amd64/trap.c:752
#7 0xffffffff807fb254 in trap_pfault (frame=3D0xffffff807a047840, usermode=
=3D0) at /usr/src/sys/amd64/amd64/trap.c:673
#8 0xffffffff807fbc02 in trap (frame=3D0xffffff807a047840) at /usr/src/sys=
/amd64/amd64/trap.c:444
#9 0xffffffff807df35e in calltrap () at /usr/src/sys/amd64/amd64/exception=
.S:209
#10 0xffffffff804c4eb8 in pfs_ioctl (va=3D0xffffff807a047a10) at /usr/src/s=
ys/fs/pseudofs/pseudofs_vnops.c:264
#11 0xffffffff805bb1d3 in vn_ioctl (fp=3DVariable "fp" is not available.
) at vnode_if.h:437
#12 0xffffffff80562d02 in kern_ioctl (td=3D0xffffff0006682000, fd=3D3, com=
=3D1076655123, data=3D0xffffff00ad2b7d40 "") at file.h:269
#13 0xffffffff80563029 in ioctl (td=3D0xffffff0006682000, uap=3D0xffffff807=
a047bf0) at /usr/src/sys/kern/sys_generic.c:571
#14 0xffffffff807fb4d6 in syscall (frame=3D0xffffff807a047c80) at /usr/src/=
sys/amd64/amd64/trap.c:900
#15 0xffffffff807df56b in Xfast_syscall () at /usr/src/sys/amd64/amd64/exce=
ption.S:330
#16 0x0000000800c9c0ec in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)
Can You help me? What can I do? Server crash periodicaly...
> For this question, you must debug the kernel by Serial.=20
> when fatal, you use find the error by command "bt".
> ------------------ =20
> Dean
> 2009-06-02
> -------------------------------------------------------------
> =E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9Ageorg
> =E5=8F=91=E9=80=81=E6=97=A5=E6=9C=9F=EF=BC=9A2009-06-02 14:51:45
> =E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9Afreebsd-questions
> =E6=8A=84=E9=80=81=EF=BC=9A
> =E4=B8=BB=E9=A2=98=EF=BC=9Afatal trap 12
> Hello, Freebsd-questions.
> I use FreeBSD 7.2-STABLE amd64. About month ago system was crashed
> with "Fatal trap 12"...
> I bay new hardware and install new FreeBSD 7.2-STABLE amd64. cPanel
> and ASSP (anti spam proxy). And one a day or two days have this:
> Fatal trap 12: page fault while in kernel mode
> cpuid: =3D 0; apic id =3D 00
> fault virtual address =3D 0x8000000000
> fault code =3D supervisor write data, page not present
> instruction pointer =3D 0x8:0xffffffff8018b839
> stack pointer =3D 0x10:0xffffff807a25d190
> frame pointer =3D 0x10:0xea5f
> 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 59397 (perl5.10.0)
> trap number =3D 12
> And alway, after crash, I see "current process =3D perl5.10.0"...
> Can You help me?
--=20
Regards, mailto:georg@dts.su
Yura
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