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パッチ名: PHKL_36153
パッチ摘要: s700_800 11.23 sem_close(2)/msgseg(5)のマンページパッチ
作成日: 07/03/09
公開日: 07/03/20
ハードウェアプラットフォームおよびOSリリース:
s700: 11.23
s800: 11.23
現象:
PHKL_36153:
1.(SR:8606456040 CR:JAGag12475)
複数のsem_open(2)呼び出しを実行する場合のsem_close(2)の使用法が、
sem_close(2)のマンページでは不明確です。
2.(SR:8606431565 CR:JAGaf91007)
Sys V IPCメッセージキューカーネルパラメータ(msgseg * msgssz)に2GBより
大きな値を設定すると、msgsnd(2)がEAGAINで異常終了します。
問題点の説明:
PHKL_36153:
1.(SR:8606456040 CR:JAGag12475)
sem_open(2)を呼び出すたびに、プロセス内の同じ名前付きセマフォに対して、
対応するsem_close(2)を呼び出す必要があるのかどうかが、sem_close(2)のマ
ンページでは不明確でした。
解決方法:
同じセマフォに対してsem_close(2)を複数回呼び出すと不定な動作になる可能
性があることを明記したWARNINGSセクションをsem_close(2)のマンページに追
加しました。
2.(SR:8606431565 CR:JAGaf91007)
Sys V IPCメッセージスペースのサポート対象上限値は2GBです。msgseg(5)の
マンページに記載されていた上限値は間違っていました。そのため、2GBを超
える値を設定すると、msgsnd(2)がEAGAINで異常終了していました。
解決方法:
msgseg(5)のマンページを修正しました。
-----------------------------------------------------------------------------
Patch Name: PHKL_36153
Patch Description: s700_800 11.23 sem_close(2) and msgseg(5) manpage patch
Creation Date: 07/03/09
Post Date: 07/03/20
Hardware Platforms - OS Releases:
s700: 11.23
s800: 11.23
Products: N/A
Filesets:
OS-Core.KERN-ENG-A-MAN,fr=B.11.23,fa=HP-UX_B.11.23_IA/PA,v=HP
ProgSupport.PAUX-ENG-A-MAN,fr=B.11.23,fa=HP-UX_B.11.23_IA/PA,v=HP
Automatic Reboot?: No
Status: General Release
Critical: No
Category Tags:
defect_repair general_release
Path Name: /hp-ux_patches/s700_800/11.X/PHKL_36153
Symptoms:
PHKL_36153:
( SR:8606456040 CR:JAGag12475 )
Ambiguity in sem_close(2) manpage over usage of multiple
sem_open(2) call
( SR:8606431565 CR:JAGaf91007 )
msgsnd(2) fails with EAGAIN when Sys V IPC message queue
kernel parameter value (msgseg * msgssz) is set to a value
greater than 2GB.
Defect Description:
PHKL_36153:
( SR:8606456040 CR:JAGag12475 )
The sem_close(2) manpage is unclear about whether for each
sem_open(2) call there must be a corresponding sem_close(2)
call made on the same named semaphore within the process.
Resolution:
Added a WARNINGS section to the sem_close(2) man page which
clarifies that multiple calls to sem_close(2) on the same
semaphore can result in an undefined behavior.
( SR:8606431565 CR:JAGaf91007 )
Sys V IPC message space support is 2GB, there is a mistake
in the msgseg(5) man page in indicating the limit. Hence,
msgsnd(2) fails with EAGAIN when trying to set beyond 2GB
value.
Resolution:
Corrected the msgseg(5) manpage to indicate the supported
limit of 2GB.
Enhancement:
No
SR:
8606456040 8606431565
Patch Files:
OS-Core.KERN-ENG-A-MAN,fr=B.11.23,fa=HP-UX_B.11.23_IA/PA,
v=HP:
/usr/share/man/man5.Z/msgseg.5
ProgSupport.PAUX-ENG-A-MAN,fr=B.11.23,
fa=HP-UX_B.11.23_IA/PA,v=HP:
/usr/share/man/man2.Z/sem_close.2
what(1) Output:
OS-Core.KERN-ENG-A-MAN,fr=B.11.23,fa=HP-UX_B.11.23_IA/PA,
v=HP:
/usr/share/man/man5.Z/msgseg.5:
None
ProgSupport.PAUX-ENG-A-MAN,fr=B.11.23,
fa=HP-UX_B.11.23_IA/PA,v=HP:
/usr/share/man/man2.Z/sem_close.2:
None
cksum(1) Output:
OS-Core.KERN-ENG-A-MAN,fr=B.11.23,fa=HP-UX_B.11.23_IA/PA,
v=HP:
877024993 2591 /usr/share/man/man5.Z/msgseg.5
ProgSupport.PAUX-ENG-A-MAN,fr=B.11.23,
fa=HP-UX_B.11.23_IA/PA,v=HP:
2033095747 1590 /usr/share/man/man2.Z/sem_close.2
Patch Conflicts: None
Patch Dependencies:
s700: 11.23: PHKL_31500
s800: 11.23: PHKL_31500
Hardware Dependencies: None
Other Dependencies: None
Supersedes: None
Equivalent Patches: None
Patch Package Size: 40 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_36153
5. Run swinstall to install the patch:
swinstall -x autoreboot=true -x patch_match_target=true \
-s /tmp/PHKL_36153.depot
By default swinstall will archive the original software in
/var/adm/sw/save/PHKL_36153. 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_36153.text file is
available in the product readme:
swlist -l product -a readme -d @ /tmp/PHKL_36153.depot
To put this patch on a magnetic tape and install from the
tape drive, use the command:
dd if=/tmp/PHKL_36153.depot of=/dev/rmt/0m bs=2k
Special Installation Instructions: None
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