Patch Name: PHKL_25041

Patch Description: s700_800 11.04 (VVOS) fixes erroneous EFAULT return

Creation Date: 01/09/07

Post Date:  01/09/18

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_25041: OTHER
		Based on HP-UX Patch PHKL_24005:  OTHER
		application sees EFAULT even while using a valid
		address.

Category Tags:
	defect_repair general_release critical

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_25041

Symptoms:
	PHKL_25041:
	Ported HP-UX patch PHKL_24005 to VVOS

	Based on HP-UX patch PHKL_24005:
	( SR: 8606157079 CR:JAGad26413)
	System returns Bad address (EFAULT) even when the
	application supplied a valid address.

Defect Description:
	PHKL_25041:
	Ported HP-UX patch PHKL_24005 to VVOS

	Based on HP-UX patch PHKL_24005:
	( SR: 8606157079 CR:JAGad26413)
	The system checks the access rights for the page twice
	before copying a page in memory. The second check is
	done if the page was not already in memory and was
	brought in by a fault. This second check can fail
	under a race condition.
	Resolution:
	The solution is not to check the access rights again if
	the fault is resolved - resolving the fault ensures that
	the page is in memory with proper access rights.

SR:
	8606157079

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(vm_mapcall.o)

	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP:
	/usr/conf/lib/libhp-ux.a(vm_mapcall.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(vm_mapcall.o):
		vm_mapcall.c $Date: 2001/05/01 13:35:43 $Revision: r
			11ros/3 PATCH_11.00 (PHKL_24005)

	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP:
	/usr/conf/lib/libhp-ux.a(vm_mapcall.o):
		vm_mapcall.c $Date: 2001/05/01 13:35:43 $Revision: r
			11ros/3 PATCH_11.00 (PHKL_24005)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_32,v=HP:
	3027304462 9428 /usr/conf/lib/libhp-ux.a(vm_mapcall.o)

	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP:
	3485969809 28208 /usr/conf/lib/libhp-ux.a(vm_mapcall.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_24005:
	s700: 11.00
	s800: 11.00

Patch Package Size: 70 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_25041

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_25041.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_25041.  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_25041.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_25041.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_25041.depot

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

		dd if=/tmp/PHKL_25041.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.