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Date:      Tue, 20 Jul 2010 00:40:08 -0400
From:      "Mikhail T." <mi+thun@aldan.algebra.com>
To:        stable@FreeBSD.org
Subject:   today's 8.1/i386: panic: bad pte
Message-ID:  <4C4528A8.5040605@aldan.algebra.com>
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Some part of KDE4's kdm crashed at start-up and seems to have taken the 
entire machine with it:

    kgdb /boot/kernel/kernel /var/crash/vmcore.22
    GNU gdb 6.1.1 [FreeBSD]
    Copyright 2004 Free Software Foundation, Inc.
    GDB is free software, covered by the GNU General Public License, and
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    Type "show copying" to see the conditions.
    There is absolutely no warranty for GDB.  Type "show warranty" for
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    This GDB was configured as "i386-marcel-freebsd"...

    Unread portion of the kernel message buffer:
    <6>pid 18398 (drkonqi), uid 0: exited on signal 11 (core dumped)
    TPTE at 0xbfca9488  IS ZERO @ VA 2a522000
    panic: bad pte
    Uptime: 2h28m24s
    Physical memory: 1263 MB
    Dumping 195 MB: 180 164 148 132 116 100 84 68 52 36 20 4

    Reading symbols from /boot/kernel/splash_pcx.ko...Reading symbols
    from /boot/kernel/splash_pcx.ko.symbols...done.
    done.
    Loaded symbols for /boot/kernel/splash_pcx.ko
    Reading symbols from /boot/kernel/vesa.ko...Reading symbols from
    /boot/kernel/vesa.ko.symbols...done.
    done.
    Loaded symbols for /boot/kernel/vesa.ko
    Reading symbols from /boot/modules/nvidia.ko...done.
    Loaded symbols for /boot/modules/nvidia.ko
    Reading symbols from /boot/kernel/linux.ko...Reading symbols from
    /boot/kernel/linux.ko.symbols...done.
    done.
    Loaded symbols for /boot/kernel/linux.ko
    Reading symbols from /boot/kernel/acpi.ko...Reading symbols from
    /boot/kernel/acpi.ko.symbols...done.
    done.
    Loaded symbols for /boot/kernel/acpi.ko
    Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols
    from /boot/kernel/linprocfs.ko.symbols...done.
    done.
    Loaded symbols for /boot/kernel/linprocfs.ko
    #0  doadump () at pcpu.h:231
    231             __asm __volatile("movl %%fs:0,%0" : "=r" (td));
    (kgdb) bt full
    #0  doadump () at pcpu.h:231
    No locals.
    #1  0xc05d10a4 in boot (howto=260) at
    /usr/src/sys/kern/kern_shutdown.c:416
             _giantcnt = Variable "_giantcnt" is not available.
    (kgdb) where
    #0  doadump () at pcpu.h:231
    #1  0xc05d10a4 in boot (howto=260) at
    /usr/src/sys/kern/kern_shutdown.c:416
    #2  0xc05d12b1 in panic (fmt=Variable "fmt" is not available.
    ) at /usr/src/sys/kern/kern_shutdown.c:590
    #3  0xc07f0406 in pmap_remove_pages (pmap=0xc85bbc78) at
    /usr/src/sys/i386/i386/pmap.c:4198
    #4  0xc079516b in vmspace_exit (td=0xc51f3a00) at
    /usr/src/sys/vm/vm_map.c:409
    #5  0xc05a7253 in exit1 (td=0xc51f3a00, rv=139) at
    /usr/src/sys/kern/kern_exit.c:303
    #6  0xc05d3296 in sigexit (td=0xc51f3a00, sig=139) at
    /usr/src/sys/kern/kern_sig.c:2872
    #7  0xc05d47a8 in postsig (sig=11) at /usr/src/sys/kern/kern_sig.c:2759
    #8  0xc06082f8 in ast (framep=0xe5fafd38) at
    /usr/src/sys/kern/subr_trap.c:234
    #9  0xc07e2c44 in doreti_ast () at
    /usr/src/sys/i386/i386/exception.s:368

Does this look familiar to anyone? Thanks!

    -mi

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