Patch Name:  PHKL_3245

Patch Description: s700 9.01 Fixes kernel data segmentation fault

The symptoms of this bug can be very bizarre. The pc value
gets changed and can be executing in a different function than
the one it should return to. This could eventually lead to
data corruption or various panics.

The problem happens due to virtual addresses hashing to the same
page table entry. While inserting the new address into the page table,
there is a possibility of having a TLB miss which could lead to
mapping the kernel stack address to physical page zero in the TLB.
This can lead to bizarre problems.

Path Name:  /hp-ux_patches/s700/9.X/PHKL_3245

Effective Date:  931014

Patch Files:  
/system/PHKL_3245/new/vm_pdir.o

SR/APR#:  5003151027

"what" string/timestamp:  
vm_pdir.o:
         vm_pdir.c     $Revision: 1.11.81.3 $ $Date: 93/10/14 17:29:35 $
PATH_9.01 (PHKL_3245)

"sum" output:  
32272 31 vm_pdir.o


Dependencies:  None

Supersedes:  None

Patch Package Size:  82 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.

---------------------------------------------------------------------------
After getting the patch onto your machine, unshar the patch (sh PHKL_3245).

To install this patch do the following:
1) Run /etc/update (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_3245.updt"
   (this assumes that you are in the /tmp directory where PHKL_3245.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_3245/orig.  HP recommends keeping this software there in
order to recover from any potential problems.  It is also recommended that
you move the PHKL_3245.text file to /system/PHKL_3245 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_3245.updt of=/dev/rmt/0m bs=2048