[asterisk-bugs] [Zaptel 0009379]: [patch] zt_specchan_open race because ZT_FLAG_OPEN testing and setting is not atomic
noreply at bugs.digium.com
noreply at bugs.digium.com
Sat Jun 7 13:59:54 CDT 2008
A NOTE has been added to this issue.
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http://bugs.digium.com/view.php?id=9379
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Reported By: Matti
Assigned To: mattf
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Project: Zaptel
Issue ID: 9379
Category: zaptel (the module)
Reproducibility: have not tried
Severity: minor
Priority: normal
Status: assigned
Zaptel Version: 1.4.7.1
SVN Branch (only for SVN checkouts, not tarball releases): N/A
SVN Revision (number only!):
Disclaimer on File?: No
Request Review:
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Date Submitted: 03-26-2007 07:55 CDT
Last Modified: 06-07-2008 13:59 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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svnbot - 06-07-08 13:59
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Repository: dahdi
Revision: 4183
_U branches/1.4/
U branches/1.4/kernel/zaptel-base.c
U branches/1.4/kernel/zaptel.h
------------------------------------------------------------------------
r4183 | mattf | 2008-06-07 13:59:53 -0500 (Sat, 07 Jun 2008) | 1 line
Partial fix for http://bugs.digium.com/view.php?id=9379. Fixes potential race
condition in open and close
routines for zaptel devices
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http://svn.digium.com/view/dahdi?view=rev&revision=4183
Issue History
Date Modified Username Field Change
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06-07-08 13:59 svnbot Checkin
06-07-08 13:59 svnbot Note Added: 0088417
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