Patch Name: PHKL_28631

Patch Description: s700_800 11.11 lofs panic in lo_realvfs,freelonode

Creation Date: 03/02/18

Post Date: 03/04/18

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_28631: PANIC

Category Tags:
	defect_repair general_release critical panic

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_28631

Symptoms:
	PHKL_28631:
	( SR:8606288981 CR:JAGae52912 )
	System panic when attempting to free an inactive lnode.
	It may appear as a Data Page Fault in freelonode(), with
	a stack trace similar to the first trace shown below, or
	as a call to panic() from lo_realvfs(), with a stack trace
	similar to the second.

	freelonode+0x90
	lo_inactive+0x124
	locallookuppn+0x508
	lookuppn+0x104
	lookupname+0x40
	vn_open+0x68
	copen+0xd0
	open+0x3c
	syscall+0x6f8
	open+0x3c
	syscall+0x6f8
	syscallinit+0x54c

	panic+0x14
	lo_realvfs+0x9c
	freelonode+0xdc
	lo_inactive+0x124
	locallookuppn+0x508
	lookuppn+0x104
	vn_create+0x94
	vn_open+0x1a0
	copen+0xd0
	open+0x3c
	syscall+0x6f8
	syscallrtn+0x0

Defect Description:
	PHKL_28631:
	( SR:8606288981 CR:JAGae52912 )
	These panics occurred after multiple threads were allowed
	to create duplicate lfsnode structures.  The code intended
	to detect and compensate for this situation sometimes
	freed the "wrong" entry, leading to a subsequent panic
	when later attempting to free the lnode structure which
	referred it.

	Resolution:
	The code was modified so that duplicate lfsnode structures
	are no longer created.

Enhancement:
	No

SR:
	8606288981

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/liblofs.a(lo_subr.o)

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

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/liblofs.a(lo_subr.o):
		lo_subr.c $Date: 2003/02/06 07:30:21 $Revision: r11.
			11/1 PATCH_11.11 (PHKL_28631)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/liblofs.a(lo_subr.o):
		lo_subr.c $Date: 2003/02/06 07:30:21 $Revision: r11.
			11/1 PATCH_11.11 (PHKL_28631)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	4247780017 5796 /usr/conf/lib/liblofs.a(lo_subr.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	1368565649 15648 /usr/conf/lib/liblofs.a(lo_subr.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches: None

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_28631

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_28631.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_28631.  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_28631.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_28631.depot

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

		dd if=/tmp/PHKL_28631.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None