Patch Name: PHKL_28539

Patch Description: s700_800 11.00 JFS3.3 Veritas FSO patch;dmapi panic

Creation Date: 03/04/10

Post Date: 03/04/24

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

Products:
	JFS 3.3;

Filesets:
	JFS.JFS-BASE2-KRN,fr=3.3,fa=HP-UX_B.11.00_32,v=HP
	JFS.JFS-BASE2-KRN,fr=3.3,fa=HP-UX_B.11.00_64,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_28539: PANIC
	PHKL_22122: HANG PANIC

Category Tags:
	defect_repair general_release critical panic halts_system

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_28539

Symptoms:
	PHKL_28539:
	( SR:8606290939 CR:JAGae54782 )
	System panic appears as a DPF or spinlock timeout in
	kdm_k_get_nextevent(), with a stack trace similar to
	the one shown below.
	panic+0x14
	report_trap_or_int_and_panic+0x80
	trap+0xdb8
	nokgdb+0x8
	kdm_k_get_nextevent+0x4b8
	kdm_dmapi_ioctl+0x1b8
	vxportal_ioctl+0x110
	spubind_cdev_ioctl+0x94
	spec_ioctl+0xac
	vno_ioctl+0x90
	ioctl+0x1f4
	syscall+0x480
	$syscallrtn+0x0

	PHKL_22122:
	( SR: 8606135465 CR: JAGad04599 )
	When using FSO, an optional Veritas product that works with
	VxFS 3.3, the system may hang or panic.

Defect Description:
	PHKL_28539:
	( SR:8606290939 CR:JAGae54782 )
	The events in hsms_outq may be freed in
	kdm_eventprocess() while these addresses are being
	traversed in kdm_k_get_nextevent().  This causes
	corruption of templist when these free addresses
	are reused.  It leads either to an infinite loop
	that causes spinlock timeout, or a DPF, owing to
	an invalid pointer in kdm_k_get_nextevent().

	Resolution:
	Now we have modified the code to take care of this
	race condition problem.

	PHKL_22122:
	( SR: 8606135465 CR: JAGad04599 )
	This problem is due to lack of synchronization between two
	VxFS 3.3 threads while accessing/updating a kernel data
	structure.  A thread doing deferred truncation bumps the
	generation count even if there are outstanding holds on the
	structure.  Another part of the VxFS code (DMAPI) assumes
	that a hold stabilizes the generation count.  This causes a
	race condition, producing unpredictable behavior.

	Resolution:
	Make sure that the generation count is not changed after
	obtaining the read-write lock on the structure in DMAPI code
	before proceeding.  If it is changed, retrun an error.

Enhancement:
	No

SR:
	8606135465 8606290939

Patch Files:
	
	JFS.JFS-BASE2-KRN,fr=3.3,fa=HP-UX_B.11.00_32,v=HP:
	/usr/conf/lib/libvxfs.a(kdm33_core.o)

	JFS.JFS-BASE2-KRN,fr=3.3,fa=HP-UX_B.11.00_64,v=HP:
	/usr/conf/lib/libvxfs.a(kdm33_core.o)

what(1) Output:
	
	JFS.JFS-BASE2-KRN,fr=3.3,fa=HP-UX_B.11.00_32,v=HP:
	/usr/conf/lib/libvxfs.a(kdm33_core.o):
		kdm33_core.c $Date: 2003/03/20 00:18:47 $Revision: r
			11ros/3 PATCH_11.00 (PHKL_28539)

	JFS.JFS-BASE2-KRN,fr=3.3,fa=HP-UX_B.11.00_64,v=HP:
	/usr/conf/lib/libvxfs.a(kdm33_core.o):
		kdm33_core.c $Date: 2003/03/20 00:18:47 $Revision: r
			11ros/3 PATCH_11.00 (PHKL_28539)

cksum(1) Output:
	
	JFS.JFS-BASE2-KRN,fr=3.3,fa=HP-UX_B.11.00_32,v=HP:
	3543236814 56084 /usr/conf/lib/libvxfs.a(kdm33_core.o)

	JFS.JFS-BASE2-KRN,fr=3.3,fa=HP-UX_B.11.00_64,v=HP:
	2873689970 134888 /usr/conf/lib/libvxfs.a(kdm33_core.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_22122 

Equivalent Patches: None

Patch Package Size: 210 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_28539

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_28539.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_28539.  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_28539.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_28539.depot

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

		dd if=/tmp/PHKL_28539.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None