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isdn/gigaset: fix NULL pointer dereference
authorTilman Schmidt <tilman@imap.cc>
Sat, 11 Oct 2014 11:46:29 +0000 (13:46 +0200)
committerDavid S. Miller <davem@davemloft.net>
Tue, 14 Oct 2014 19:05:33 +0000 (15:05 -0400)
In do_action, a NULL pointer might be passed to function start_dial
which will dereference it.
Fix by adding a check for NULL before the call.

Spotted with Coverity.

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

No differences found
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