From: Ying Xue <ying.xue@windriver.com>
Date: Thu, 28 Aug 2014 02:02:41 +0000 (+0800)
Subject: tipc: fix a potential oops
X-Git-Tag: fixes-against-v3.18-rc2~81^2~199
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cc086fcf92996965f0dcf05c6641d65381705266;p=pandora-kernel.git

tipc: fix a potential oops

Commit 6c9808ce09f7 ("tipc: remove port_lock") accidentally involves
a potential bug: when tipc socket instance(tsk) is not got with given
reference number in tipc_sk_get(), tsk is set to NULL. Subsequently
we jump to exit label where to decrease socket reference counter
pointed by tsk pointer in tipc_sk_put(). However, As now tsk is NULL,
oops may happen because of touching a NULL pointer.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Erik Hugne <erik.hugne@ericsson.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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