Fatal trap 12

From: Chris Readle (patterner_at_rocketmail.com)
Date: 10/16/03

  • Next message: Chris Readle: "Hrm...didn't check the second trap" 
    Date: Wed, 15 Oct 2003 23:44:45 -0700 (PDT)
To: freebsd-questions@freebsd.org

    Hi all,

    New to FBSD, and in the process of moving my Linux/Windows PC to
    FBSD/Windows.

    I got two spontaneous reboots last night (the first times it happened) and
    I got fatal trap 12s in /var/log/messages each time. I wasn't doing
    anything too heavy, just a make index && make readmes on my ports,
    listening to some music through XMMS and browsing the web via Mozilla.

    I searched the archives and the FAQ. I haven't built a debugging kernel
    yet, but I thought I would post the info I have in the hopes that someone
    might be able to help.

    I did do an nm - n on the kernel, however.

    uname -a:
    FreeBSD creadle.oc.cox.net 4.8-RELEASE-p13 FreeBSD 4.8-RELEASE-p13 #4: Wed
    Oct 15 08:55:21 PDT 2003
    chris@creadle.oc.cox.net:/usr/obj/usr/src/sys/CREADLE i386

    /var/log/messages:
    Oct 14 21:45:23 creadle /kernel: Fatal trap 12: page fault while in kernel
    mode
    Oct 14 21:45:23 creadle /kernel: fault virtual address = 0xbfca02c8
    Oct 14 21:45:23 creadle /kernel: fault code = supervisor read,
    page not present
    Oct 14 21:45:23 creadle /kernel: instruction pointer = 0x8:0xc028fe83
    Oct 14 21:45:23 creadle /kernel: stack pointer = 0x10:0xd2cfbcf8
    Oct 14 21:45:23 creadle /kernel: frame pointer = 0x10:0xd2cfbd08
    Oct 14 21:45:23 creadle /kernel: code segment = base 0x0, limit
    0xfffff, type 0x1b
    Oct 14 21:45:23 creadle /kernel: = DPL 0, pres 1, def32 1, gran 1
    Oct 14 21:45:23 creadle /kernel: processor eflags = interrupt
    enabled, resume, IOPL = 0
    Oct 14 21:45:23 creadle /kernel: current process = 73961
    (sh)
    Oct 14 21:45:23 creadle /kernel: interrupt mask = net tty bio cam
    Oct 14 21:45:23 creadle /kernel: trap number = 12
    Oct 14 21:45:23 creadle /kernel: panic: page fault

    nm -n:
    creadle# nm -n /kernel | grep c028fe8
    c028fe88 T pmap_ts_referenced
    creadle# nm -n /kernel | grep c028fe
    c028fe7c T pmap_phys_address
    c028fe88 T pmap_ts_referenced

    I did two because I thought it was odd that the first one came up with a
    higher address than the actual pointer.

    Any good suggestions?

    chris

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  • Next message: Chris Readle: "Hrm...didn't check the second trap"