[Crash-utility] Can anyone give me a hint as to what's likely going wrong here?

Dave Anderson anderson at redhat.com
Mon Aug 20 20:54:25 UTC 2007


James Washer wrote:
> This is a SLES9sp3 lcrash dump... on and x86_64 box... Should I expect crash to work here (using a -g kernel)?
> 
> Any/all help/hints are appreciated.
> 
>
> <readmem: ffffffff8036cda0, KVADDR, "kernel_config_data", 32768, (ROE), 13535a0>
> WARNING: could not find MAGIC_START!
> <readmem: ffffffff8058f210, KVADDR, "xtime", 16, (FOE), 9062b0>
> <readmem: ffffffff803d42e0, KVADDR, "system_utsname", 390, (ROE), 90689c>
> <readmem: ffffffff803d42c8, KVADDR, "linux_banner", 8, (FOE), 7fbfffd5d8>
> WARNING: invalid linux_banner pointer: 0
> <readmem: 0, KVADDR, "accessible check", 8, (ROE|Q), 7fbfffd250>
> crash: invalid kernel virtual address: 0  type: "accessible check"
> crash: /usr/src/linux-2.6.5-7.244/vmlinux and /root/dale/dump.1 do not match!
> 
> Usage:
>   crash [-h [opt]][-v][-s][-i file][-d num] [-S] [mapfile] [namelist] [dumpfile]
> 
> Enter "crash -h" for details.

I can't answer why, but it's simply a matter that the
"linux_banner" pointer at address ffffffff803d42c8 contains
a zero.  That all presumes that the translation of the
the kernel virtual address ffffffff803d42c8 into its
location in the dumpfile is correct, and that the dumpfile
contents are legitimate.

Dave





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