Bug 638866

Summary: [5.5] a race in pid generation that causes pids to be reused immediately. [rhel-5.5.z]
Product: Red Hat Enterprise Linux 5 Reporter: RHEL Program Management <pm-rhel>
Component: kernelAssignee: Jiri Pirko <jpirko>
Status: CLOSED ERRATA QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: urgent Docs Contact:
Priority: high    
Version: 5.5CC: anderson, cww, dhoward, haliu, jpirko, jwest, moshiro, myamazak, pm-eus, qcai, rkhan, tao
Target Milestone: rcKeywords: ZStream
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
A race in the PID generation caused PIDs to be reused immediately. This caused problems such as signaling or killing wrong processes accidentally, resulting in various application faults. With this update, the reuse of PIDs is detected and is no longer allowed.
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-11-09 18:09:26 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 634850    
Bug Blocks:    

Description RHEL Program Management 2010-09-30 07:38:28 UTC
This bug has been copied from bug #634850 and has been proposed
to be backported to 5.5 z-stream (EUS).

Comment 2 Jiri Pirko 2010-10-11 08:54:56 UTC
in kernel 2.6.18-194.20.1.el5

linux-2.6-misc-fix-race-in-pid-generation-causing-immediate-reuse.patch

Comment 7 errata-xmlrpc 2010-11-09 18:09:26 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2010-0839.html

Comment 8 Martin Prpič 2010-11-11 13:58:31 UTC
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
A race in the PID generation caused PIDs to be reused immediately. This caused problems such as signaling or killing wrong processes accidentally, resulting in various application faults. With this update, the reuse of PIDs is detected and is no longer allowed.