Patch Name: PHKL_0881

Patch Description: kernel panic executing process over NFS.

   This patch fixes a kernel panic of "Data segmentation fault" when a
   executable that is NFS mounted is executed and it tries to write a core
   file.  The problem occurs when the original executable has been removed on
   the NFS server and the core dumping routines on the NFS client can not
   read the initialized data.  The problem only occurs if the initialized
   data must never have been paged in.

   The file fixed was mach.800/vm_mapcall.c

   When this problem occurs, the kernel will no longer panic, but it will
   not write out the core file since it can not determine what the initialized
   data was.  To avoid this problem the user should not remove executables
   while they are being used by NFS clients.  This is a generic problem of
   NFS and can not be fixed at this time.

   The equivalent patch for 8.07 is PHKL_0877.

Path Name: /hp-ux_patches/s700/8.X/PHKL_0881

Effective Date: 920302

Patch Files: /system/PHKL_0881/new/conf/nfs_vnops.o

SR/APR#: 5000671909

"what" string/timestamp:
vm_mapcall.o:
	 PATCH_8.05:     vm_mapcall.o    1.9.43.5    92/03/02 PHKL_0881

"sum" output:
27715 7 vm_mapcall.o

Dependencies:  None.

Supersedes: None.

Patch Package Size: 37 Kbytes

Installation Instructions: 

     Please review all instructions and the Hewlett-Packard
     SupportLine User Guide or your Hewlett-Packard support terms
     and conditions for precautions, scope of license,
     restrictions, and, limitation of liability and warranties,
     before installing this patch.

     Note: Please back up your system before you patch.

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After getting the patch onto your machine, unshar the patch (sh PHKL_0881).

To install this patch do the following:
1) Run the update program (Note: you must be logged in as root to update
   a system).
2) Once in the update "Main Menu" move the highlighted line to "Change
   Source or Destination ->" and press "Return" or "Select Item".
3) Make sure the highlighted item in the "Change Source or Destination"
   window is "From Tape Device to Local System ...", then press "Return" or
   "Select Item".
4) You should now be in the "From Tape Device to Local System" window.
   Change the "Source:  /dev/rmt/0m" to "Source: /tmp/PHKL_0881.updt" 
   (this assumes that you are in the /tmp directory where PHKL_0881.updt
   has been placed).  Note: You must enter the complete path name.
5) Press "Done".
6) From here on follow the standard directions for update.

The customized script that update runs will move the original software 
to /system/PHKL_0881/orig.  HP recommends keeping this software there in
order to recover from any potential problems.  It is also recommended that
you move the PHKL_0881.text file to /system/PHKL_0881 to be retained for
future reference.

If you wish to put this patch on a magnetic tape and update from the tape
drive, dd a copy of the patch to the tape drive.  As an example the
following will create a copy of the patch that update can read:
dd if=PHKL_0881.updt of=/dev/rmt/0m bs=2048