Patch Name: PHKL_27682

Patch Description: s700_800 11.11 diag0 cumulative patch

Creation Date: 02/10/26

Post Date:  02/10/29

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_27682: PANIC MEMORY_LEAK CORRUPTION

Category Tags:
	defect_repair general_release critical panic corruption
	memory_leak

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_27682

Symptoms:
	PHKL_27682:
	( SR:8606280707 CR:JAGae44677 )
	When a 32-bit application running on a 64-bit
	operating system accesses the diag0 driver, the
	system may panic with a data page fault. The
	panic stack trace may be similar to the
	following:

	    panic+0x14
	    report_trap_or_int_and_panic+0x80
	    trap+0xdb8
	    nokgdb+0x8
	    lbcopy_pcxu_method+0x8
	    privlbcopy+0x1c
	    diag0_send_msg+0xac
	    diag0_strategy+0xbc
	    physio+0x178
	    diag0_write+0x188
	    spubind_cdev_write+0x84
	    spec_rdwr+0x18c
	    vno_rw+0x1d4
	    write+0x104
	    syscall+0x480
	    $syscallrtn+0x0

Defect Description:
	PHKL_27682:
	( SR:8606280707 CR:JAGae44677 )
	The diag0 driver does not synchronize the write()
	system call. As a result, multiple threads could
	reference the same port and could allocate,
	deallocate or modify the same user data structure.
	Simultaneous allocation and deallocation by
	different threads can result in memory leaks,
	and simultaneous modification of the same user
	data structure can result in data corruption.
	This problem is only seen on 32-bit applications
	running on a 64-bit OS.
	Resolution:
	Code for allocating memory and setting up the
	user data structure has been moved from the
	driver's write routine to the strategy routine.

Enhancement:
	No

SR:
	8606280707

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libsio.a(diag0.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libsio.a(diag0.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libsio.a(diag0.o):
		diag0.c $Date: 2002/10/18 06:33:32 $Revision: r11.11
			/2 PATCH_11.11 (PHKL_27682)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libsio.a(diag0.o):
		diag0.c $Date: 2002/10/18 06:33:32 $Revision: r11.11
			/2 PATCH_11.11 (PHKL_27682)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	3311303927 19636 /usr/conf/lib/libsio.a(diag0.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	3897130834 67376 /usr/conf/lib/libsio.a(diag0.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches: None

Patch Package Size: 110 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_27682

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_27682.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_27682.  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_27682.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_27682.depot

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

		dd if=/tmp/PHKL_27682.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None