Merged revisions 368947 via svnmerge from

Merged revisions 368947 via svnmerge from
file:///srv/subversion/repos/asterisk/branches/10

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  r368947 | mjordan | 2012-06-14 12:31:33 -0500 (Thu, 14 Jun 2012) | 21 lines

  AST-2012-009: Fix crash in chan_skinny due to Key Pad Button Message handling

  AST-2012-008 (r367844) fixed a denial of service attack exploitable in the
  Skinny channel driver that occurred when certain messages are sent after a
  previously registered station sends an Off Hook message.  Unresolved in that
  patch is an issue in the Asterisk 10 releases, wherein, if a Station Key
  Pad Button Message is processed after an Off Hook message, the channel driver
  will inappropriately dereference a NULL pointer.

  This patch fixes those places where the message handling or the channel
  callback functions would attempt to dereference the line's pointer to the
  device.

  (issue ASTERISK-19905)
  Reported by: Christoph Hebeisen
  Tested by: mjordan, Christoph Hebeisen
  Patches:
    AST-2012-009-10.diff uploaded by mjordan (license 6283)
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