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Digest Name: weekly HP-UX series 700 10.X patch digest
    Created: Thu Mar 1 3:05:06 PST 2001

Table of Contents:

Document ID Title
--------------- -----------
PHKL_22701 s700 10.20 argv[0] passing, ptrace, core creation

The documents are listed below.
-------------------------------------------------------------------------------


Document ID: PHKL_22701
Date Loaded: 20010228
      Title: s700 10.20 argv[0] passing, ptrace, core creation

Patch Name: PHKL_22701

Patch Description: s700 10.20 argv[0] passing, ptrace, core creation

Creation Date: 01/02/08

Post Date: 01/02/28

Hardware Platforms - OS Releases:
        s700: 10.20

Products: N/A

Filesets:
        OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
        No (superseded patches were critical)
        PHKL_23171: HANG

Path Name: /hp-ux_patches/s700/10.X/PHKL_22701

Symptoms:
        PHKL_22701:
        (SR: 8606163811 CR: JAGad33115)
        Once-setuid/setgid processes could create corefiles or be
        attached to with a debugger. If the process core file's
        size limit has been set to 0 in setrlimit(), when the
        process aborts, the core processing is incorrect.

        PHKL_17033:
        One symptom is that scripts ending in rsh have rsh called
        undesirably

        Example: the folling exists in the file x_rsh

        #!/usr/bin/ksh
        cd /foo
        echo "Hello World"

        The cd will not be permitted when the script is exec'd

        PHKL_23171:
        (SR: 8606172359 CR: JAGad41619)
        On a multi-processor system, ptrace of a process by multiple
        processes can fail. This can lead sometimes to process or
        system hangs.

        This defect was introduced with the patch this patch
        supersedes (PHKL_21431) and can only bee seen on
        multi-processor systems.

        PHKL_21431:
        (SR: 5003352484 CR: JAGaa11895)
        Debuggers attempting to work with a child process of a
        process already under debug fail. The failure is reported
        at the moment the child process to be debugged is forked.
        The following is an example of the error that DDE may
        report:

        "kernel internal error: Process events (fork, vfork, exit,
        exec) will not be reported."

Defect Description:
        PHKL_22701:
        (SR: 8606163811 CR: JAGad33115)
        If a setuid/setgid process completely dropped privileges, it
        could create a core file on a subsequent abort, and could be
        attached to with a debugger. If the process core file's
        size limit has been set to 0 in setrlimit(), when the
        process aborts, the core processing is incoreect.

        Resolution:
        Remember that the process was once setuid/setgid, and
        disallow corefiles and debugger attaches. If the process
        core file size limit has been set to zero, don't create a
        core file.

        PHKL_17033:
        When an interpreter was being invoked via a shell script,
        the kernel was incorrectly passing in argv[0]. Instead of
        the interpreter name, the kernel was passing in the name
        of the script to the interpreter which was invoked.

        for example, if your script is named 'script' and has
        the first line
        #!/bin/ksh

        ksh should be passed in for argv[0], but instead,
        'script' was being passed.

        PHKL_23171:
        (SR: 8606172359 CR: JAGad41619)
        Code paths exists which can leave an alpha semaphore locked
        on exit.

        Resolution:
        Calls to ptrace now make sure that alpha semaphores are
        correctly released for all code paths.

        PHKL_21431:
        (SR: 5003352484 CR: JAGaa11895)
        When a process under debug forks out a new child process,
        the debugger, if asked to do so, will also attempt to fork a
        new debugger for the child process. Since the PT_ATTACH for
        the child process occurs when the child process has not yet
        even run, certain variables have not yet been set and
        additional debugger commands fail to work properly.

        Resolution:
        In order to get the debugged child process to go through the
        proper path and initialize the apropriate variables, this
        process is now forced to go from TSSTOP to TSRUN. To
        accomplish this correctly, extra synchronization in the
        PT_ATTACH code executed by the debugger was added. This
        extra synchronization allows the debugged child process to
        complete its initialization before the debugger is allowed
        to continue.

SR:
        1653195487 5003352484 8606163811 8606172359

Patch Files:
        /usr/conf/lib/libhp-ux.a(kern_exec.o)
        /usr/conf/lib/libhp-ux.a(pm_core.o)
        /usr/conf/lib/libhp-ux.a(pm_prot.o)
        /usr/conf/lib/libhp-ux.a(pm_ptrace.o)

what(1) Output:
        /usr/conf/lib/libhp-ux.a(kern_exec.o):
                kern_exec.c $Date: 2001/02/07 12:33:35 $ $Revisio
                        n: 1.93.98.27 $ PATCH_10.20 (PHKL_22701)
        /usr/conf/lib/libhp-ux.a(pm_core.o):
                pm_core.c $Date: 2001/02/07 12:33:58 $ $Revision:
                         1.9.98.12 $ PATCH_10.20 (PHKL_22701)
        /usr/conf/lib/libhp-ux.a(pm_prot.o):
                pm_prot.c $Date: 2001/02/07 12:34:16 $ $Revision: 1.
                        5.98.6 $ PATCH_10.20 (PHKL_22701)
        /usr/conf/lib/libhp-ux.a(pm_ptrace.o):
                pm_ptrace.c $Date: 2001/02/07 12:34:30 $ $Revision:
                        1.6.98.28 $ PATCH_10.20 (PHKL_22701)

cksum(1) Output:
        797856390 17124 /usr/conf/lib/libhp-ux.a(kern_exec.o)
        341467858 7040 /usr/conf/lib/libhp-ux.a(pm_core.o)
        323919827 11192 /usr/conf/lib/libhp-ux.a(pm_prot.o)
        247651324 16456 /usr/conf/lib/libhp-ux.a(pm_ptrace.o)

Patch Conflicts: None

Patch Dependencies:
        s700: 10.20: PHKL_16750

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
        PHKL_17033 PHKL_21431 PHKL_23171

Equivalent Patches:
        PHKL_22702:
        s800: 10.20

        PHKL_22032:
        s700: 11.00

Patch Package Size: 120 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_22701

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

                swinstall -x autoreboot=true -x match_target=true \
                        -s /tmp/PHKL_22701.depot

        By default swinstall will archive the original software in
        /var/adm/sw/patch/PHKL_22701. 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_22701.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_22701.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.
-----End of Document ID: PHKL_22701------------------------------------------

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