Bug#493055: BRIStuff patches introduce deadlock

[Kevin Shanahan]

Package: asterisk
Version: 1.4.21.2~dfsg-1
Severity: grave

I had some problems with my Asterisk installation having the PRI
channels lock up completely when certain types of calls were
received. Eventually this was traced back to a deadlock caused by the
bristuff patches being applied.

Various information, logs and a stack trace of the lockup here:
   http://bugs.digium.com/view.php?id=13192

I'm choosing severity "grave" because this effectively will allow
someone calling in with particlar caller ID options/flags to lock up
your PRI span on demand (i.e. DoS).

Regards,
Kevin.