Patch Name:  PHKL_2875

Patch Description: panic data segmentation fault (ioctl IOMAPMAP findpreg)

The panic usually occurs as a data segmentation fault in the kernel
routine findpreg.  It occurs when iomapping is done and the driver code
does an iomap_open call and then the process exits before an IOMAPMAP
ioctl call is made.  An entry in a kernel data structure is added at the
time of the open, but not deleted at the exit.  The fix allows for the
deletion of the entry so that it is not referenced.

PHKL_1964: allow duplicate memory mappings

        This allows duplicate uses of map_mem_to_host()
        and iomap(7) on the same address range.


Path Name:  /hp-ux_patches/s700/9.X/PHKL_2875

Effective Date:  930716

Patch Files:  
/system/PHKL_2875/new/io_map.o
/system/PHKL_2875/new/iomap.o

SR/APR#:  None.

"what" string/timestamp:  
io_map.o:
         PATCH_9.01 io_map.o 1.2.61.9.1.1 93/01/15 PHKL_1964
iomap.o:
         iomap.o        $Revision: 1.2.81.4 $ $Date: 93/07/16 15:20:34 $
PATCH_9.01 PHKL_2875


"sum" output:  
26761 9 io_map.o
24873 10 iomap.o


Dependencies:  None.

Supersedes: PHKL_1964

Patch Package Size:  72 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_2875).

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_2875.updt"
   (this assumes that you are in the /tmp directory where PHKL_2875.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_2875/orig.  HP recommends keeping this software there in
order to recover from any potential problems.  It is also recommended that
you move the PHKL_2875.text file to /system/PHKL_2875 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_2875.updt of=/dev/rmt/0m bs=2048