Patch Name: PHKL_23028

Patch Description: s700_800 11.04 (VVOS) Fix panic on deadlock:NULL thread ptr

Creation Date: 01/09/01

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_23028: PANIC
		Based on  PHKL_21680: PANIC

Category Tags:
	defect_repair general_release critical panic

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_23028

Symptoms:
	PHKL_23028:
	Port HP-UX patch PHKL_21680 (fix panic on
	deadlock - NULL thread ptr) to VVOS.

	Based on HP-UX patch PHKL_21680:
	( SR: 8606134000 CR: JAGad03140 )
	When using lockf(2) or fcntl(2) system calls to lock a file
	or regions of a file, the system may panic with "deadlock:
	NULL thread ptr associated with filelock".  The stack trace
	has the following pattern:

	  0) panic+0x14
	  1) deadlock+0x118
	  2) locked+0x1f0
	  3) local_lockctl+0xf4
	  4) fcntl+0x2e4
	  5) syscall+0x480
	  6) $syscallrtn+0x0

Defect Description:
	PHKL_23028:
	Port HP-UX patch PHKL_21680 (fix panic on
	deadlock - NULL thread ptr) to VVOS.

	Based on HP-UX patch PHKL_21680:
	( SR: 8606134000 CR: JAGad03140 )
	In the deadlock detection routine, if the kernel finds that
	a thread which owns a file lock (locking a file or records
	by calling lockf(2) or fcntl(2)) has been terminated without
	releasing the lock, it panics.  The system should not panic
	in this situation as it will not cause a problem or
	deadlock; the lock can be released by another thread, or it
	will be released when the process exits.

	Resolution:
	The panic condition has been changed.  The system panics
	only if deadlock() can not find the thread which locked the
	file, and the process of the thread does not exist or is in
	zombie state.  The panic message has been changed to:
	"deadlock: terminated process associated with filelock".

SR:
	8606134000

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(vfs_lockf.o)

	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP:
	/usr/conf/lib/libhp-ux.a(vfs_lockf.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(vfs_lockf.o):
		$Source: kern/sys/vfs_lockf.c, hpuxsysvfs, vvos_rose
			, rose0141 $ $Date: 01/01/08 14:37:21 $ $Rev
			ision: 1.2.1.8 PATCH_11.04 (PHKL_23028) $

	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP:
	/usr/conf/lib/libhp-ux.a(vfs_lockf.o):
		$Source: kern/sys/vfs_lockf.c, hpuxsysvfs, vvos_rose
			, rose0141 $ $Date: 01/01/08 14:37:21 $ $Rev
			ision: 1.2.1.8 PATCH_11.04 (PHKL_23028) $

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_32,v=HP:
	35553545 17148 /usr/conf/lib/libhp-ux.a(vfs_lockf.o)

	OS-Core.CORE2-KRN,fr=B.11.04,fa=HP-UX_B.11.04_64,v=HP:
	629586931 40432 /usr/conf/lib/libhp-ux.a(vfs_lockf.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_21680:
	s700: 11.00
	s800: 11.00

Patch Package Size: 90 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_23028

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_23028.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_23028.  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_23028.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_23028.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_23028.depot

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

		dd if=/tmp/PHKL_23028.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.