Dear SCO Customer,

Support Level Supplement (SLS) ptf7439e, the UnixWare 7.1.0 s5, sfs,
memfs and vxfs Driver Supplement, addresses all of the issues listed 
below.


SLS ptf7439a addressed this issue:

1. Some actions can consume the whole of memory, forcing the system to
   start swapping.


SLS ptf7439b addressed these issues:

2. The ls command locks on memfs.

3. A security issue in the usage of /tmp involving linking or symbolic
   linking of well-known temporary filenames to critical system files
   is fixed. The fix is implemented as additional restrictions on link,
   rename (mv) and symbolic linking on directories that have the sticky
   bit set.


SLS ptf7439c addressed these issues:

4. VxFS caused a kma paranoid panic due to not checking for vnode 
   softcounts before kmem_free()ing the vx_biginode.

5. Incorrect KMA buffer references occur after kernel memory has
   been freed in memfs.


SLS ptf7439d addressed this issue:

6. A problem was found in the vx_rename1() routine of the VxFS driver
   that caused a kernel panic.


SLS ptf7439e additionally addresses these issues:

7. Unmounting a vxfs snapshot volume fails to update the volume status,
   preventing removal of that volume.

8. The kernel panics when trying to create a vxfs snapshot in which
   either target or destination device (or both) is a disk slice (and
   not an ODM volume).


Contents
--------

        /etc/conf/pack.d/memfs/Driver_atup.o
        /etc/conf/pack.d/memfs/Driver_mp.o
        /etc/conf/pack.d/s5/Driver_atup.o
        /etc/conf/pack.d/s5/Driver_mp.o
        /etc/conf/pack.d/sfs/Driver_atup.o
        /etc/conf/pack.d/sfs/Driver_mp.o
        /etc/conf/pack.d/vxfs/Driver_atup.o
        /etc/conf/pack.d/vxfs/Driver_mp.o
        /etc/conf/pack.d/vol/Driver_atup.o
        /etc/conf/pack.d/vol/Driver_mp.o
        /etc/conf/pack.d/mem/Driver_atup.o
        /etc/conf/pack.d/mem/Driver_mp.o


Software Notes and Recommendations
----------------------------------

SLS ptf7439e should only be installed on:

        UnixWare 7 Release 7.1.0


Installation Instructions
-------------------------

1. Download the ptf7439e.Z file to the /tmp directory on your machine.

2. As root, uncompress the file and add the SLS package to your system 
   using these commands:

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7439e.Z
        # pkgadd -d /tmp/ptf7439e
        # rm /tmp/ptf7439e

Alternatively, this SLS package may be installed in quiet mode,
that is, without displaying the release notes and asking for
installation confirmation.  To do this, use these commands:

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7439e.Z
        # pkgadd -qd /tmp/ptf7439e all
        # rm /tmp/ptf7439e

3. Reboot the system after installing this SLS package.

The release notes displayed prior to installation can be found in:

        /var/sadm/pkg/ptf7439/install/ptf7439.txt


Removal Instructions
--------------------

1. As root, remove the SLS package using these commands:

        $ su
        Password: <type your root password>
        # pkgrm ptf7439

2. Reboot the system after removing this SLS package.

If you have questions regarding this SLS, or the product on which
it is installed, please contact your software supplier.