fatal trap 12
Paul B. Mahol
onemda at gmail.com
Sat Jun 6 10:33:43 UTC 2009
On 6/6/09, georg at dts.su <georg at dts.su> wrote:
> Hello, Freebsd-questions.
>
> After one of new crash I have this:
>
> GNU gdb 6.1.1 [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
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for details.
> 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 = 2; apic id = 02
> fault virtual address = 0x0
> fault code = supervisor read data, page not present
> instruction pointer = 0x8:0xffffffff804c4eb8
> stack pointer = 0x10:0xffffff807a0478f0
> frame pointer = 0x10:0xffffff807a047930
> code segment = base 0x0, limit 0xfffff, type 0x1b
> = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags = interrupt enabled, resume, IOPL = 0
> current process = 32668 (perl5.10.0)
> Physical memory: 4082 MB
> Dumping 1647 MB: 1632 1616 1600 1584 1568 1552 1536 1520 1504 1488 1472 1456
> 1440 1424 1408 1392 1376 1360 1344 1328 1312 1296 1280 1264 1248 1232 1216
> 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
> 640 624 608 592 576 560 544 528 512 496 480 464 448 432 416 400 384 368 352
> 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" : "=r" (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 = va->a_vp;
> 264 struct pfs_vdata *pvd = vn->v_data;
> 265 struct pfs_node *pn = 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=Variable "dummy1" is not
> available.
> ) at /usr/src/sys/ddb/db_command.c:516
> #2 0xffffffff801c92df in db_command (last_cmdp=0xffffffff80b30c88,
> cmd_table=0x0, dopager=1) 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=Variable "type" is not available.
> ) at /usr/src/sys/ddb/db_main.c:228
> #5 0xffffffff80554e55 in kdb_trap (type=12, code=0, tf=0xffffff807a047840)
> at /usr/src/sys/kern/subr_kdb.c:524
> #6 0xffffffff807fae80 in trap_fatal (frame=0xffffff807a047840, eva=Variable
> "eva" is not available.
> ) at /usr/src/sys/amd64/amd64/trap.c:752
> #7 0xffffffff807fb254 in trap_pfault (frame=0xffffff807a047840, usermode=0)
> at /usr/src/sys/amd64/amd64/trap.c:673
> #8 0xffffffff807fbc02 in trap (frame=0xffffff807a047840) 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=0xffffff807a047a10) at
> /usr/src/sys/fs/pseudofs/pseudofs_vnops.c:264
> #11 0xffffffff805bb1d3 in vn_ioctl (fp=Variable "fp" is not available.
> ) at vnode_if.h:437
> #12 0xffffffff80562d02 in kern_ioctl (td=0xffffff0006682000, fd=3,
> com=1076655123, data=0xffffff00ad2b7d40 "") at file.h:269
> #13 0xffffffff80563029 in ioctl (td=0xffffff0006682000,
> uap=0xffffff807a047bf0) at /usr/src/sys/kern/sys_generic.c:571
> #14 0xffffffff807fb4d6 in syscall (frame=0xffffff807a047c80) at
> /usr/src/sys/amd64/amd64/trap.c:900
> #15 0xffffffff807df56b in Xfast_syscall () at
> /usr/src/sys/amd64/amd64/exception.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...
Add more debug options to kernel, because dump is not useful
with corrupted stack.
>> For this question, you must debug the kernel by Serial.
>> when fatal, you use find the error by command "bt".
>
>> ------------------
>> Dean
>> 2009-06-02
>
>> -------------------------------------------------------------
>> 发件人：georg
>> 发送日期：2009-06-02 14:51:45
>> 收件人：freebsd-questions
>> 抄送：
>> 主题：fatal 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: = 0; apic id = 00
>> fault virtual address = 0x8000000000
>> fault code = supervisor write data, page not present
>> instruction pointer = 0x8:0xffffffff8018b839
>> stack pointer = 0x10:0xffffff807a25d190
>> frame pointer = 0x10:0xea5f
>> code segment = base 0x0, limit 0xfffff, type 0x1b
>> = DPL 0, pres 1, long 1, def32 0, gran 1
>> processor eflags = interrupt enabled, resume, IOPL = 0
>> current process = 59397 (perl5.10.0)
>> trap number = 12
>
>> And alway, after crash, I see "current process = perl5.10.0"...
>
>> Can You help me?
>
>
> --
> Regards, mailto:georg at dts.su
> Yura
>
>
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--
Paul
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