tree 1f78a2f37ba05126f902cd5be66c37414a4c6683
parent 854d23b77aa25b203c7af11de885c3b8b3834c20
author Tilman Schmidt <tilman@imap.cc> 1413027990 +0200
committer David S. Miller <davem@davemloft.net> 1413313534 -0400

isdn/capi: prevent NULL pointer dereference on invalid CAPI command

An invalid CAPI 2.0 command/subcommand combination may retrieve a
NULL pointer from the cpars[] array which will later be dereferenced
by the parser routines.
Fix by adding NULL pointer checks in strategic places.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>