From: Tilman Schmidt <tilman@imap.cc>
Date: Sat, 11 Oct 2014 11:46:30 +0000 (+0200)
Subject: isdn/gigaset: fix non-heap pointer deallocation
X-Git-Tag: fixes-against-v3.18-rc2~61^2~49^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b8324f94202af7dc688576259803a2ef9a98d655;p=pandora-kernel.git

isdn/gigaset: fix non-heap pointer deallocation

at_state structures may be allocated individually or as part of a
cardstate or bc_state structure. The disconnect() function handled
both cases, creating a risk that it might try to deallocate an
at_state structure that had not been allocated individually.
Fix by splitting disconnect() into two variants handling cases
with and without an associated B channel separately, and adding
an explicit check.

Spotted with Coverity.

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