Patch Name: PHKL_20605

Patch Description: s700 10.20 mmap, munmap, fcntl/mmap, mmap64 Fixes

Creation Date: 99/12/08

Post Date:  99/12/13

Hardware Platforms - OS Releases:
	s700: 10.20

Products: N/A

Filesets:
	OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Superseded

Critical:
	Yes
	PHKL_20605: PANIC

Path Name: /hp-ux_patches/s700/10.X/PHKL_20605

Symptoms:
	PHKL_20605:
	( SR: 8606105836 CR: JAGab74182 )
	Data page fault panic in hdl_choose_protid().  Stack
	trace looks like:

	panic+0x10
	report_trap_or_int_and_panic+0xe8
	trap+0x1054
	$RDB_trap_patch+0x20
	hdl_choose_protid+0xe4
	hdl_changerange_0xe4
	hdl_mprotect+0x404
	choose_shared_mmap_space+0x2c8
	choose_space+0xcc
	hdl_attach+0x1a4
	attachreg+0x88
	smmap_common+0x27c
	smmap+0x38
	syscall+0x1a4
	$syscallrtn+0x0

	( SR: 8606110048 CR: JAGab82751 )
	Data page fault panic on multiprocessor system.
	Stack trace might look like:

	panic+0x10
	report_trap_or_int_and_panic+0xe8
	trap+0xa48
	$RDB_trap_patch+0x20
	hdl_range_same+0x68
	hdl_changerange+0x90
	hdl_mprotect+0x404
	choose_shared_mmap_space+0x268
	choose_space+0x9c
	hdl_attach+0x1a4
	attachreg+0x88
	smmap_common+0x728
	smmap+0x38
	syscall+0x1a4

	or

	panic+0x10
	report_trap_or_int_and_panic+0xe8
	trap+0xa48
	$call_trap+0x20
	hdl_range_same+0x68
	hdl_changerange+0x90
	hdl_mprotect+0x404
	do_shared_munmap+0xe8
	do_munmap+0x14c
	foreach_pregion+0xb8
	munmap+0x64
	syscall+0x1a4

	PHKL_19383:
	mmap64(2) returns an error when used to map portions of a
	file beyond the 2 GB file offset.

	PHKL_16880:
	It is possible for "munmap" to unexpectedly release the
	lock that is obtained from "fcntl".  The application may
	experience an unexpected behavior because of this.
	Therefore, this patch is to rectify this unexpected
	behavior.

Defect Description:
	PHKL_20605:
	( SR: 8606105836 CR: JAGab74182 )
	When removing a pregion from a region's pregion list, the
	appropriate pregion structure field was not always cleared.

	Resolution:
	This patch ensures that the pregion structure is properly
	updated when we remove it from a region's pregion list.

	( SR: 8606110048 CR: JAGab82751 )
	A multiprocessor race condition between mmap/munmap resulted
	in attempting to access a subpregion before it had been
	initialized.

	Resolution:
	This patch ensures we initialize the subpregion before
	attempting to access it.

	PHKL_19383:
	mmap64(2) previously only supported file offsets up to 2 GB.
	Resolution:
	The mmap64(2) system call has been enhanced to support file
	offsets up to 4 GB.

	PHKL_16880:
	To correct the problem, the associations between
	"memory mapped file" and the system-wide file table
	reference count is removed.  (i.e. The reference count
	is no longer stored in the system wide file table,
	however, the vnode reference counter still gets updated
	when "mmap" and "munmap".)

SR:
	1653270546 1653277004 8606105836 8606110048

Patch Files:
	/usr/conf/lib/libhp-ux.a(hdl_policy.o)
	/usr/conf/lib/libhp-ux.a(vm_mmap.o)
	/usr/conf/lib/libhp-ux.a(vm_pregion.o)

what(1) Output:
	/usr/conf/lib/libhp-ux.a(hdl_policy.o):
		hdl_policy.c $Date: 99/12/08 10:23:20 $ $Revision: 1
			.15.98.16 $ PATCH_10.20 (PHKL_20605)
	/usr/conf/lib/libhp-ux.a(vm_mmap.o):
		vm_mmap.c     $Date: 99/08/09 09:49:44 $ $Revision:
			1.17.98.21 $ PATCH_10.20 (PHKL_19383)
	/usr/conf/lib/libhp-ux.a(vm_pregion.o):
		vm_pregion.c  $Date: 99/12/08 10:20:06 $ $Revision:
			1.16.98.15 $ PATCH_10.20 (PHKL_20605)

cksum(1) Output:
	3183592068 12184 /usr/conf/lib/libhp-ux.a(hdl_policy.o)
	2671705764 21376 /usr/conf/lib/libhp-ux.a(vm_mmap.o)
	2455028766 11932 /usr/conf/lib/libhp-ux.a(vm_pregion.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 10.20: PHKL_16750

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_16880 PHKL_19383

Equivalent Patches:
	PHKL_20606:
	s800: 10.20

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_20605

	5a. For a standalone system, run swinstall to install the
	    patch:

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_20605.depot

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHKL_20605.  If you do not wish to retain a
	copy of the original software, you can create an empty file
	named /var/adm/sw/patch/PATCH_NOSAVE.

	WARNING: If this file exists when a patch is installed, the
	         patch cannot be deinstalled.  Please be careful
		 when using this feature.

	It is recommended that you move the PHKL_20605.text file to
	/var/adm/sw/patch for future reference.

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

		dd if=/tmp/PHKL_20605.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:
	This patch depends on base patch PHKL_16750.
	For successful installation, please ensure that PHKL_16750
	is in the same depot with this patch, or PHKL_16750 is
	already installed.