
Patch Name: PHKL_23995

Patch Description: s700_800 11.11 Fixes copyin for an erroneous EFAULT return

Creation Date: 01/05/03

Post Date:  01/08/02

Hardware Platforms - OS Releases:
	s700: 11.11
	s800: 11.11

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_23995: OTHER
		Under some race conditions the system returns a
		bad address on a write operation on a valid address.

Category Tags:
	defect_repair general_release critical

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_23995

Symptoms:
	PHKL_23995:
	( SR:8606173564 CR:JAGad42822 )
	The system may return a Bad Address (EFAULT) on a legal
	write()

Defect Description:
	PHKL_23995:
	( SR:8606173564 CR:JAGad42822 )
	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:
	8606173564

Patch Files:

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libvm-pdk.a(vm_mapcall.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libvm-pdk.a(vm_mapcall.o)

what(1) Output:

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libvm-pdk.a(vm_mapcall.o):
		vm_mapcall.c $Date: 2001/04/25 12:45:14 $Revision: r
			11.11/2 PATCH_11.11 (PHKL_23995)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libvm-pdk.a(vm_mapcall.o):
		vm_mapcall.c $Date: 2001/04/25 12:45:14 $Revision: r
			11.11/2 PATCH_11.11 (PHKL_23995)

cksum(1) Output:

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	879357681 9092 /usr/conf/lib/libvm-pdk.a(vm_mapcall.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	3845256753 24816 /usr/conf/lib/libvm-pdk.a(vm_mapcall.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches:
	PHKL_24005:
	s700: 11.00
	s800: 11.00

Patch Package Size: 60 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_23995

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_23995.depot

	By default swinstall will archive the original software in
	/var/adm/sw/save/PHKL_23995.  If you do not wish to retain a
	copy of the original software, include the patch_save_files
	option in the swinstall command above:

		-x patch_save_files=false

	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_23995.text file is
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_23995.depot

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

		dd if=/tmp/PHKL_23995.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None




