Re: Fatal trap 12: page fault while in kernel mode with samba

From: Doug White (dwhite_at_gumbysoft.com)
Date: 03/31/04

  • Next message: Doug White: "Re: unable to boot current" 
    Date: Tue, 30 Mar 2004 20:06:41 -0800 (PST)
To: Hilko Meyer <Hilko.Meyer@gmx.de>

    I haven't had time to look at this.

    Can y ou try it with -CURRENT, if you ahve't already? I don't have any
    5.2.1-R boxes around.

    On Mon, 29 Mar 2004, Hilko Meyer wrote:

    > Hilko Meyer schrieb:
    > >Hilko Meyer schrieb:
    > >>Doug White schrieb:
    > >>>On Wed, 24 Mar 2004, Hilko Meyer wrote:
    > >>>
    > >Then I tried the GENERIC-kernel. And it also crashed, if I access the CDROM
    > >via samba. I've compiled it with
    > >makeoptions DEBUG=-g
    > >but the gdb-output looks weird:
    >
    > I've compiled the GENERIC-Kernel again. Of course before I've got the new
    > security advisory....
    > So, the system is still 5.2.1-RELEASE-p3 and the crash occurs with
    > samba-2.2.8a. The Backtrace follows below.
    >
    > ---
    > Fatal trap 12: page fault while in kernel mode
    > cpuid = 0; apic id = 00
    > fault virtual address= 0x8
    > fault code= supervisor read, page not present
    > instruction pointer= 0x8:0xc0632f10
    > stack pointer = 0x10:0xcdaf4c8c
    > frame pointer = 0x10:0xcdaf4cec
    > code segment= base 0x0, limit 0xfffff, type 0x1b
    > = DPL 0, pres 1, def32 1, gran 1
    > processor eflags= interrupt enabled, resume, IOPL = 0
    > current process= 31596 (smbd)
    > trap number= 12
    > panic: page fault
    > cpuid = 0;
    >
    > syncing disks, buffers remaining... 295 295 295 294 294 294 294 294 294 294
    > 294 294 294 294 294 294 294 294 294 294 294 294 294
    > giving up on 231 buffers
    > Uptime: 2h10m33s
    > Dumping 128 MB
    > 16 32 48 64 80 96 112
    > ---
    > Reading symbols from /boot/kernel/logo_saver.ko...done.
    > Loaded symbols for /boot/kernel/logo_saver.ko
    > Reading symbols from
    > /usr/obj/usr/src/sys/GENERIC/modules/usr/src/sys/modules/linux/linux.ko.debug...done.
    > Loaded symbols for
    > /usr/obj/usr/src/sys/GENERIC/modules/usr/src/sys/modules/linux/linux.ko.debug
    > #0 doadump () at /usr/src/sys/kern/kern_shutdown.c:240
    > 240dumping++;
    > (kgdb) list *0xc0632f10
    > 0xc0632f10 is in quotactl (/usr/src/sys/kern/vfs_syscalls.c:206).
    > 201NDFREE(&nd, NDF_ONLY_PNBUF);
    > 202error = vn_start_write(nd.ni_vp, &mp, V_WAIT | PCATCH);
    > 203vrele(nd.ni_vp);
    > 204if (error)
    > 205return (error);
    > 206error = VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg, td);
    > 207vn_finished_write(mp);
    > 208return (error);
    > 209}
    > 210
    > (kgdb) bt
    > #0 doadump () at /usr/src/sys/kern/kern_shutdown.c:240
    > #1 0xc05e8653 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:372
    > #2 0xc05e896b in panic () at /usr/src/sys/kern/kern_shutdown.c:550
    > #3 0xc0756591 in trap_fatal (frame=0xcdaf4c4c, eva=8) at
    > /usr/src/sys/i386/i386/trap.c:821
    > #4 0xc07562cd in trap_pfault (frame=0xcdaf4c4c, usermode=0, eva=8) at
    > /usr/src/sys/i386/i386/trap.c:735
    > #5 0xc0755f65 in trap (frame=
    > {tf_fs = 24, tf_es = 16, tf_ds = 16, tf_edi = -844149484, tf_esi =
    > -1038023424, tf_ebp = -844149524, tf_isp = -844149640, tf_ebx = 0, tf_edx =
    > 4, tf_ecx = -1029080276, tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_eip =
    > -1067241712, tf_cs = 8, tf_eflags = 66118, tf_esp = 0, tf_ss = 136315328})
    > at /usr/src/sys/i386/i386/trap.c:420
    > #6 0xc07458b8 in calltrap () at {standard input}:94
    > #7 0xc075682f in syscall (frame=
    > {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 1003, tf_esi =
    > -1077944416, tf_ebp = -1077944360, tf_isp = -844149388, tf_ebx = 1009,
    > tf_edx = 1009, tf_ecx = -1077942920, tf_eax = 148, tf_trapno = 22, tf_err =
    > 2, tf_eip = 674856735, tf_cs = 31, tf_eflags = 582, tf_esp = -1077944436,
    > tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:1010
    > #8 0xc074590d in Xint0x80_syscall () at {standard input}:136
    > ---Can't read userspace from dump, or kernel process---
    >
    > (kgdb) quit
    >
    > If you need more Information, I'll try to provide you with more Information.
    > But I'll need some help and guidance, because I'm new to kernel debugging.
    >
    > bye,
    > Hilko
    > 

    -- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org
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