Patch Name: PHKL_11942

Patch Description: s700 10.01 UFS disk space leak using mmap() patch

Creation Date: 97/07/24

Post Date:  97/07/29

Hardware Platforms - OS Releases:
	s700: 10.01

Products: N/A

Filesets:
	OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_11942: OTHER
		UFS file systems could experience disk space leak.

Path Name: /hp-ux_patches/s700/10.X/PHKL_11942

Symptoms:
	PHKL_11942:
	Disk space leak on UFS file systems; running fsck(1M) on
	a `clean' file system would report inconsistencies such as:
	  ...
	  ** Phase 1 - Check Blocks and Sizes
	  INCORRECT BLOCK COUNT I=386 (4 should be 1)
	  ...
	  ** Phase 5 - Check Cyl groups
	  3 BLK(S) MISSING
	  ...
	This would be observed only on UFS file systems with a
	fragment size less than 4KB.

Defect Description:
	PHKL_11942:
	A corner case use of mmap(2) consisting of mapping the first
	few bytes of a small file (less than 3KB)  residing on a UFS
	file system  wrongly  resulted in  increasing  the number of
	fragments allocated to the file.  The file-system disk space
	could  leak, but  running  fsck(1M)  would fix the  problem.
	This problem  would only occur on UFS file  systems  using a
	fragment size less than 4KB.

SR:
	4701347963

Patch Files:
	/usr/conf/lib/libhp-ux.a(ufs_vm.o)

what(1) Output:
	/usr/conf/lib/libhp-ux.a(ufs_vm.o):
		ufs_vm.c  $Date: 97/07/24 12:16:25 $ $Revision: 1.2.
			72.26 $ PATCH_10.01 (PHKL_11942)

cksum(1) Output:
	1293888105 9788 /usr/conf/lib/libhp-ux.a(ufs_vm.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches:
	PHKL_11943:
	s800: 10.01

Patch Package Size: 70 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_11942

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

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_11942.depot

	5b. For a homogeneous NFS Diskless cluster run swcluster on the
	    server to install the patch on the server and the clients:

		swcluster -i -b

	    This will invoke swcluster in the interactive mode and
	    force all clients to be shut down.

	    WARNING: All cluster clients must be shut down prior to the
		     patch installation.  Installing the patch while the
		     clients are booted is unsupported and can lead to
		     serious problems.

	    The swcluster command will invoke an swinstall session in which
	    you must specify:

		alternate root path  -  default is /export/shared_root/OS_700
		source depot path    -  /tmp/PHKL_11942.depot

	    To complete the installation, select the patch by choosing
	    "Actions -> Match What Target Has" and then "Actions -> Install"
	    from the Menubar.

	5c. For a heterogeneous NFS Diskless cluster:

		- run swinstall on the server as in step 5a to install
		  the patch on the cluster server.

		- run swcluster on the server as in step 5b to install
		  the patch on the cluster clients.

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHKL_11942.  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_11942.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_11942.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None