[asterisk-bugs] [DAHDI-linux 0009379]: [patch] zt_specchan_open race because ZT_FLAG_OPEN testing and setting is not atomic

[Asterisk Bug Tracker]

The following issue has been RESOLVED. 
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https://issues.asterisk.org/view.php?id=9379 
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Reported By:                Matti
Assigned To:                sruffell
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Project:                    DAHDI-linux
Issue ID:                   9379
Category:                   zaptel (the module)
Reproducibility:            have not tried
Severity:                   minor
Priority:                   normal
Status:                     resolved
JIRA:                        
Reviewboard Link:            
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2007-03-26 07:55 CDT
Last Modified:              2010-10-20 07:23 CDT
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Summary:                    [patch] zt_specchan_open race because ZT_FLAG_OPEN
testing and setting is not atomic
Description: 
Function zt_specchan_open in file zaptel.c can have a race condition
because ZT_FLAG_OPEN testing and setting is not atomic. The function should
check and set the flag holding the spin lock continuously in and between
the following lines:
if (chans[unit]->flags & ZT_FLAG_OPEN)
chans[unit]->flags |= ZT_FLAG_OPEN;
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Relationships       ID      Summary
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related to          0010806 Channel opening and unregistering race
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Issue History 
Date Modified    Username       Field                    Change               
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2010-10-20 07:23 svnbot         Status                   assigned => resolved
2010-10-20 07:23 svnbot         Resolution               reopened => fixed   
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