5.2.1 panic

[John Baldwin]

On Thursday 13 May 2004 01:16 pm, Kevin A. Pieckiel wrote:
> The situation:
>
> Dell PowerEdge 1750, Dual 3.2 GHz, 1 GB RAM.
> Sources compiled from CVS on 4 May 2004, RELENG_5_2 branch.
>
> # uname -a
> FreeBSD hr-stc-file2.smartrafficenter.net 5.2.1-RELEASE-p5 FreeBSD
> 5.2.1-RELEASE-p5 #0: Tue May  4 11:02:47 EDT 2004    
> toor at fileserver2.smartrafficenter.net:/usr/obj/usr/src/sys/FILESERVER1 
> i386
>
> One filesystem NFS mounted from another FBSD 4.9 box.
> Samba 3.0.4 is installed and running (AD member server).
> Samba is mapping home directories to the NFS-mounted files.
>
> When accessing a home directory from a Windows computer (trying
> to read files from the NFS-mounted filesystem), the computer
> panics and reboots.
>
> NFS support provided via modules, not compiled into kernel.
> Gdb output and kernel config follow.
>
> Any ideas why or how to fix?
>
> Kevin
>
>
> Gdb and backtrace output:
>
> This GDB was configured as "i386-unknown-freebsd"...
> panic: page fault
> panic messages:
> ---
> Fatal trap 12: page fault while in kernel mode
> cpuid = 1; apic id = 01
> fault virtual address   = 0x8
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc0519a64

Do 'l *0xc0519a64' in gdb to get the line that it actually faulted on.  Since 
this is likely a NULL pointer deref that might help you fix the bug or at 
least find out its cause.

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org