[asterisk-bugs] [Asterisk 0014682]: Race condition in ast_db_get()

[Asterisk Bug Tracker]

The following issue has been SUBMITTED. 
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http://bugs.digium.com/view.php?id=14682 
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Reported By:                makoto
Assigned To:                
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Project:                    Asterisk
Issue ID:                   14682
Category:                   Core/General
Reproducibility:            sometimes
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.2.X 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-03-16 20:07 CDT
Last Modified:              2009-03-16 20:07 CDT
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Summary:                    Race condition in ast_db_get()
Description: 
ast_db_get() may retrieve a wrong value because the data are copied
to the variable value after dblock is unlocked.
The copy should be done before unlock.

This can be reproduced on our cutomer's environment which is based on
Asterisk 1.2.18. I don't test it on the 1.4.x yet, but I believe that
this can be reproduced also on Asterisk 1.4 or later.

Attached patch will fix the problem.

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Issue History 
Date Modified    Username       Field                    Change               
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2009-03-16 20:07 makoto         New Issue                                    
2009-03-16 20:07 makoto         Asterisk Version          => 1.2.X           
2009-03-16 20:07 makoto         Regression                => No              
2009-03-16 20:07 makoto         SVN Branch (only for SVN checkouts, not tarball
releases) => N/A             
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