Patch Name: PHSS_20651

Patch Description: s700_800 10.20 MeasureWare/Glance C.02.40 libarm patch

Creation Date: 99/12/14

Post Date:  00/01/05

Hardware Platforms - OS Releases:
	s700: 10.20
	s800: 10.20

Products:
	MeasureWare C.02.40
	GlancePlus C.02.40
	GlancePlus Pak C.02.40

Filesets:
	MeasurementInt.TT,C.02.40.000

Automatic Reboot?: No

Status: General Release

Critical: No

Path Name: /hp-ux_patches/s700_800/10.X/PHSS_20651

Symptoms:
	PHSS_20651:
	There is a potential problem that ARM-instrumented programs
	may encounter on systems running with hostnames which are
	exact multiples of 8 characters long.  For example, a
	program linked to libarm.sl running on a system with a 8
	character hostname or a 16 character hostname may abort or
	experience other memory allocation related failures.  This
	symptom is a corner case and is not likely to occur for
	most applications.
	This patch is specific to the 10.20 December 99 Application
	Release.  Other patches provide this same fix for other OS
	and product versions.

Defect Description:
	PHSS_20651:
	There is an interaction of libarm with the small block
	allocator of libc's malloc such that on systems with
	hostnames exactly 8 or 16 or 24 or 32 characters long, one
	byte of heap data may be overwritten by a null character
	when the program calls arm_init.  This happens because
	arm_init called malloc to allocate some internal memory
	based on the size of the hostname, and then it wrote the
	hostname appended with a null character into that memory.

SR:
	R555004886

Patch Files:
	/opt/perf/lib/libarm.a
	/opt/perf/lib/libarm.sl

what(1) Output:
	/opt/perf/lib/libarm.a:
		libarm         C.02.40.10  12/09/99 HP-UX 10.20 =*=
	/opt/perf/lib/libarm.sl:
		libarm         C.02.40.10  12/02/99 HP-UX 10.20 =*=

cksum(1) Output:
	4006671329 45846 /opt/perf/lib/libarm.a
	4217725082 37040 /opt/perf/lib/libarm.sl

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches:
	PHSS_20654:
	s700: 11.00
	s800: 11.00

Patch Package Size: 140 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.
	------------------------------------------------------------
	1. Back up your system before installing a patch.

	2. Login as root.

	3. Copy the patch to the /tmp directory.

	4. Move to the /tmp directory and unshar the patch:

		cd /tmp
		sh PHSS_20651

	5a. For a standalone system, run swinstall to install the
	    patch:

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHSS_20651.depot

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHSS_20651.  If you do not wish to retain a
	copy of the original software, you can create an empty file
	named /var/adm/sw/patch/PATCH_NOSAVE.

	WARNING: If this file exists when a patch is installed, the
	         patch cannot be deinstalled.  Please be careful
		 when using this feature.

	It is recommended that you move the PHSS_20651.text file to
	/var/adm/sw/patch for future reference.

	To put this patch on a magnetic tape and install from the
	tape drive, use the command:

		dd if=/tmp/PHSS_20651.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:
	SUBSYSTEM_SHUT
	Installation of this libarm patch will affect any current
	programs using ARM.  The MeasureWare/Glance MeasurementInt
	daemon processes midaemon and ttd will be terminated if
	they are active when this patch is installed.  This will
	cause any Glance processes, as well as the MeasureWare
	scopeux collection daemon to terminate.  You will need to
	restart them after patch installation completes.  Also,
	any ARMed applications should be restarted after patch
	installation completes.  Application programs which were
	archive-linked with libarm.a should be recompiled.