Patch Name: PHKL_21680

Patch Description: s700_800 11.00 Fix panic on deadlock: NULL thread ptr

Creation Date: 00/05/11

Post Date:  00/05/22

Hardware Platforms - OS Releases:
	s700: 11.00
	s800: 11.00

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_21680: PANIC

Category Tags:
	defect_repair general_release critical panic

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_21680

Symptoms:
	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_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.11.00,fa=HP-UX_B.11.00_32,v=HP:
	/usr/conf/lib/libhp-ux.a(vfs_lockf.o)

	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
	/usr/conf/lib/libhp-ux.a(vfs_lockf.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP:
	/usr/conf/lib/libhp-ux.a(vfs_lockf.o):
		vfs_lockf.c $Date: 2000/05/10 09:36:06 $Revision: r1
			1ros/6 PATCH_11.00 (PHKL_21680)

	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
	/usr/conf/lib/libhp-ux.a(vfs_lockf.o):
		vfs_lockf.c $Date: 2000/05/10 09:36:06 $Revision: r1
			1ros/6 PATCH_11.00 (PHKL_21680)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP:
	786787523 17436 /usr/conf/lib/libhp-ux.a(vfs_lockf.o)

	OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
	1908067956 40208 /usr/conf/lib/libhp-ux.a(vfs_lockf.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 11.00: PHKL_18543
	s800: 11.00: PHKL_18543

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches: None

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_21680

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_21680.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_21680.  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_21680.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_21680.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_21680.depot

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

		dd if=/tmp/PHKL_21680.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:
	This patch depends on base patch PHKL_18543.
	For successful installation please insure that PHKL_18543
	is already installed, or that PHKL_18543 is included
	in the same depot with this patch and PHKL_18543
	is selected for installation.