Bug 856679

Summary: ipvs: fix oops in ip_vs_dst_event on rmmod
Product: Red Hat Enterprise MRG Reporter: John Kacur <jkacur>
Component: realtime-kernelAssignee: John Kacur <jkacur>
Status: CLOSED CURRENTRELEASE QA Contact: David Sommerseth <davids>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 2.1CC: bhu, lgoncalv, ovasik
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Target Release: ---   
Hardware: Unspecified   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: 856675 Environment:
Last Closed: 2012-09-18 19:20:19 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 856675    
Bug Blocks:    

Description John Kacur 2012-09-12 14:52:57 UTC 
+++ This bug was initially created as a clone of Bug #856675 +++
(because we need to fix 3.0-rt as well as 3.4-rt)

The following commit is needed

commit 283283c4da91adc44b03519f434ee1e7e91d6fdb
Author: Julian Anastasov <ja>
Date:   Sat Jul 7 20:30:11 2012 +0300

    ipvs: fix oops in ip_vs_dst_event on rmmod
    
        After commit 39f618b4fd95ae243d940ec64c961009c74e3333 (3.4)
    "ipvs: reset ipvs pointer in netns" we can oops in
    ip_vs_dst_event on rmmod ip_vs because ip_vs_control_cleanup
    is called after the ipvs_core_ops subsys is unregistered and
    net->ipvs is NULL. Fix it by exiting early from ip_vs_dst_event
    if ipvs is NULL. It is safe because all services and dests
    for the net are already freed.