Patch Name: PHKL_23063

Patch Description: s700_800 11.04 (VVOS) vfork(2)-panic when low on memory

Creation Date: 01/12/17

Post Date:  01/03/17

Hardware Platforms - OS Releases:
	s700: 11.04
	s800: 11.04

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_32,v=HP
	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_23063: PANIC

Category Tags:
	defect_repair general_release critical panic

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_23063

Symptoms:
	PHKL_23063:
	Ported HP-UX patch PHKL_20731 to VVOS.

	Based on PHKL_20731:
	Under severe memory pressure, system could panic with what
	appeared to be a bad pointer in vasusage().

Defect Description:
	PHKL_23063:
	Ported HP-UX patch PHKL_20731 to VVOS.

	Based on PHKL_20731:
	This was an MP race between vfork(2) and vmtotal().  If the
	system is out of RAM, vfork(2) can fail, and there was a
	small chance that a corrupt p_vas could result.
	Resolution:
	Acquire/release spinlocks around the critical section in
	vfork(2).

SR:
	1653306100

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_32,v=HP:
	/usr/conf/lib/libhp-ux.a(pm_procdup.o)

	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP:
	/usr/conf/lib/libhp-ux.a(pm_procdup.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_32,v=HP:
	/usr/conf/lib/libhp-ux.a(pm_procdup.o):
		pm_procdup.c $Date: 1999/12/17 07:30:52 $Revision: r
			11ros/6 PATCH_11.00 (PHKL_20731)

	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP:
	/usr/conf/lib/libhp-ux.a(pm_procdup.o):
		pm_procdup.c $Date: 1999/12/17 07:30:52 $Revision: r
			11ros/6 PATCH_11.00 (PHKL_20731)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_32,v=HP:
	3083059904 7848 /usr/conf/lib/libhp-ux.a(pm_procdup.o)

	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP:
	3158208446 14608 /usr/conf/lib/libhp-ux.a(pm_procdup.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 11.04: PHKL_19142
	s800: 11.04: PHKL_19142

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches:
	PHKL_20731:
	s800: 11.00

	PHKL_19889:
	s700: 10.20

	PHKL_19890:
	s800: 10.20

Patch Package Size: 50 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 PHKL_23063

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_23063.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_23063.  If you do not wish to retain a
	copy of the original software, use the patch_save_files option:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -x patch_save_files=false -s /tmp/PHKL_23063.depot

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

	For future reference, the contents of the PHKL_23063.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_23063.depot

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

		dd if=/tmp/PHKL_23063.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:
	This patch depends on base patch PHKL_19142.
	For successful installation please insure that PHKL_19142
	is already installed, or that PHKL_19142 is included
	in the same depot with this patch and PHKL_19142
	is selected for installation.