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Patch Name: PHKL_27282
Patch Description: s700_800 11.00 signal cumulative patch
Creation Date: 02/06/26
Post Date: 02/07/26
Hardware Platforms - OS Releases:
s700: 11.00
s800: 11.00
Products: N/A
Filesets:
OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP
OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP
Automatic Reboot?: Yes
Status: General Release
Critical:
Yes
PHKL_27282: ABORT
Category Tags:
defect_repair enhancement general_release critical
halts_system
Path Name: /hp-ux_patches/s700_800/11.X/PHKL_27282
Symptoms:
PHKL_27282:
( SR:8606258511 CR:JAGae22811 )
Applications which are compiled for the 32-bit data model
and run on a 64-bit kernel can sometimes abort with the
messages: "Pid <nnn> killed due to trashed stack. Pid <nnn>
was killed due to failure in writing the signal context."
In most cases, the application was compiled with +O2
optimization or uses alloca(3C) with a computed size
argument.
PHKL_20228:
( SR: 8606107525 DTS: JAGab77768 )
This patch is patch 7 of 8 patches necessary to add support
for the 3 Gb private address space feature.
Defect Description:
PHKL_27282:
( SR:8606258511 CR:JAGae22811 )
The problem is that the upper half of the 64-bit stack
pointer can sometimes contain non-zero data (e.g., due to
overflows in calculating the size argument for alloca(); or
due to optimizer use of the upper half of the register for
temporary storage). This causes the kernel to make invalid
references to the user stack, resulting in program aborts.
Resolution:
For 32-bit programs, the kernel will now use only the lower
half of the stack pointer register, which is the correct and
complete address.
PHKL_20228:
( SR: 8606107525 DTS: JAGab77768 )
This is one of 8 patches necessary to add support for the
3 Gb private address space feature. This feature allows a
process to have a private 3rd quadrant (normally the 3rd
quadrant, which is a 1 Gb range of address space from
0x80000000 to 0xC0000000, is used for shared objects). The
chatr command must be used to enable this feature for an
executable (chatr +q3p enable <a.out>). Note that this
feature is only enabled for 32 bit processes running on the
64 bit version of HP-UX.
The other 7 patches necessary to enable this feature are
PHKL_20222, PHKL_20223, PHKL_20224, PHKL_20225, PHKL_20226,
PHKL_20227 and PHKL_20229. Each patch may be installed
independently of the others - if enabling the 3 Gb private
address space feature is not desired. If fewer than all
8 patches are installed, the 3 Gb private address space
feature will not be enabled. The code in this patch that
is part of this feature will not have any impact on the
system until all 8 patches are installed.
Resolution:
A subset of the code to support the 3 Gb private address
space feature was added. When all 8 patches are installed
the following code changes to support this feature will
have been added:
1) Code to recognize the request for a private 3rd
quadrant (Q3) during exec() of an executable.
An executable that requests a private 3rd
quadrant will be referred to as a q3p process
below.
2) Code to prevent allocation of shared objects
in q3p processes.
3) Code to allow data to extend over the 2nd/3rd
quadrant boundary for q3p processes.
4) Code to put the stack for the primary thread
in the 3rd quadrant for q3p processes.
5) Code to map a shared library into the private
address space if there is no more room in the
4th shared quadrant for q3p processes.
SR:
8606107525 8606258511
Patch Files:
OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP:
/usr/conf/lib/libhp-ux.a(pm_sendsig.o)
OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
/usr/conf/lib/libhp-ux.a(pm_sendsig.o)
what(1) Output:
OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP:
/usr/conf/lib/libhp-ux.a(pm_sendsig.o):
pm_sendsig.c $Date: 2002/06/26 09:50:32 $Revision: r
11ros/5 PATCH_11.00 (PHKL_27282)
OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
/usr/conf/lib/libhp-ux.a(pm_sendsig.o):
pm_sendsig.c $Date: 2002/06/26 09:50:32 $Revision: r
11ros/5 PATCH_11.00 (PHKL_27282)
cksum(1) Output:
OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_32,v=HP:
3473568661 21384 /usr/conf/lib/libhp-ux.a(pm_sendsig.o)
OS-Core.CORE2-KRN,fr=B.11.00,fa=HP-UX_B.11.00_64,v=HP:
2231778966 51904 /usr/conf/lib/libhp-ux.a(pm_sendsig.o)
Patch Conflicts: None
Patch Dependencies:
s700: 11.00: PHKL_18543
s800: 11.00: PHKL_18543
Hardware Dependencies: None
Other Dependencies: None
Supersedes:
PHKL_20228
Equivalent Patches:
PHKL_27283:
s700: 11.11
s800: 11.11
Patch Package Size: 100 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_27282
5. Run swinstall to install the patch:
swinstall -x autoreboot=true -x patch_match_target=true \
-s /tmp/PHKL_27282.depot
By default swinstall will archive the original software in
/var/adm/sw/save/PHKL_27282. 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_27282.text file is
available in the product readme:
swlist -l product -a readme -d @ /tmp/PHKL_27282.depot
To put this patch on a magnetic tape and install from the
tape drive, use the command:
dd if=/tmp/PHKL_27282.depot of=/dev/rmt/0m bs=2k
Special Installation Instructions:
This patch depends on base patch PHKL_18543.
For successful installation please insure that PHKL_18543
is already installed, or that PHKL_18543 is included
in the same depot with this patch and PHKL_18543
is selected for installation.
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