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Date: Wed, 10 Oct 2012 21:37:46 GMT
From: Mateusz Guzik <mjguzik@gmail.com>
To: freebsd-gnats-submit@FreeBSD.org
Subject: hwpmc can leak memory on unload
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>Number:         172577
>Category:       kern
>Synopsis:       [hwmpc] hwpmc can leak memory on unload
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    davide
>State:          patched
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct 10 22:58:27 UTC 2012
>Closed-Date:    
>Last-Modified:  Tue Apr 30 16:54:17 UTC 2013
>Originator:     Mateusz Guzik
>Release:        head r241305
>Organization:
>Environment:
>Description:
On unload of hwpmc the following is reported:

Warning: memory type pmc leaked memory on destroy (2 allocations, 512 byt
es leaked).

Cause:
on load pmc_md_initialize() causes some buffers to be allocated
on unload the following code from pmc_cleanup is executed:
              if (md->pmd_cputype == PMC_CPU_GENERIC)
                        pmc_generic_cpu_finalize(md);
                else
                        pmc_md_finalize(md);


pmc_generic_cpu_finalize does not free any memory allocated by functions called by pmc_md_initialize.
>How-To-Repeat:
I have CPU: Intel(R) Core(TM)2 Duo CPU     P9600  @ 2.66GHz (2660.06-MHz K8-class CPU) and ran the following in VirtualBox:

# kldload hwpmc
# kldunlod hwpmc
>Fix:


>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->patched 
State-Changed-By: hiren 
State-Changed-When: Tue Apr 30 16:50:25 UTC 2013 
State-Changed-Why:  
http://svnweb.freebsd.org/base?view=revision&amp;revision=250097 



Responsible-Changed-From-To: freebsd-bugs->davide 
Responsible-Changed-By: hiren 
Responsible-Changed-When: Tue Apr 30 16:50:25 UTC 2013 
Responsible-Changed-Why:  
Davide fixed it in r250097 


http://www.freebsd.org/cgi/query-pr.cgi?pr=172577 
>Unformatted:
