Patch Name: PHKL_11825

Patch Description: s700 10.10 chown() limit, mknod and utime cumulative patch

Creation Date: 97/07/16

Post Date:  97/07/25

Hardware Platforms - OS Releases:
	s700: 10.10

Products: N/A

Filesets:
	OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Superseded

Critical: No

Path Name: /hp-ux_patches/s700/10.X/PHKL_11825

Symptoms:
	PHKL_11825:
	When a user specifies the owner and group value of a file
	to be 60,000 (Decimal), the chown command fails. But when
	he specifies a value of 100,000, the chown command takes
	the last 16 bits and modifies the ownership of the file.
	(in this case chown command should fail). According to
	chown man page, the maximum value for uid and gid should
	be less than 60,000 and any specified value which is
	greater than or equal to UID_MAX (60,000) is INVALID and
	chown should return an error code (EINVAL).

	PHKL_7761:
	Setting a negative timestamp with utime() fails

	PHKL_6486:
	mknod with mode S_IFSOCK appears to succeed, though the file
	it makes doesn't actually do anything.  According to XPG4v2
	mknod S_IFSOCK should return EINVAL.

Defect Description:
	PHKL_11825:
	There is NO check in chown() system call for values of
	uid/gid which are greater or equal to UID_MAX (60,000).
	uid and gid are of type int (signed) and when they are
	assigned to va_uid and va_gid for doing a vnode operation,
	they are casted to 16-bit shorts. So the truncated values
	are passed onto the file system.

	uid and gid are defined as:

	                register struct a {
	                char    *fname;
	                int     uid;
	                int     gid;
	        } *uap;

	And va_uid and va_uid are defined as:

	       u_short  va_uid;  /* owner user id */
	       u_short  va_gid;  /* owner group id */

	Now in chown() we are assigning va_uid to uid thus
	truncating those values to 16-bits.

	       vattr.va_uid = uap->uid;
	       vattr.va_gid = uap->gid;

	NOTE:
	       Some signed uid/gids are valid.
	       e.g.
	       -2 is used by NFS for "nobody" or "anonymous".
	       We should not be truncating this information by
	       only allowing positive values.

	All valid negative values fall as unsigned positive values
	above 60000 and below 65536 (-1 translates to 65535 in
	16-bit signed/unsigned conversion).

	PHKL_7761:
	Negative time values for file modtimes are not defined in
	standards.  Release 10.0 opted to make such values invalid.
	Unfortunately, some vendors were using negative times as
	flags rather than timestamps, and disallowing such values
	broke the application.

	The fix was to allow negative timestamps again.

	PHKL_6486:
	see above

SR:
	1653138164 4701311407 5003374389

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

what(1) Output:
	/usr/conf/lib/libhp-ux.a(vfs_scalls.o):
		vfs_scalls.c  $Date: 97/07/16 15:55:35 $ $Revision:
			1.14.89.28 $ PATCH_10.10 (PHKL_11825)

cksum(1) Output:
	1591236260 25176 /usr/conf/lib/libhp-ux.a(vfs_scalls.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_6486 PHKL_7761

Equivalent Patches:
	PHKL_11826:
	s800: 10.10

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_11825

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

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_11825.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_11825.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_11825.  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_11825.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_11825.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None