tree 4973b70e2590391fcf1ecc12f5021081a60cbfd2
parent 95e27a4da6143ad8a0c908215a0f402031b9ebf3
author Hoang Le <hoang.h.le@dektech.com.au> 1554271504 +0700
committer David S. Miller <davem@davemloft.net> 1554424451 -0700

tipc: add NULL pointer check

skb somehow dequeued out of inputq before processing, it causes to
NULL pointer and kernel crashed.

Add checking skb valid before using.

Fixes: c55c8edafa9 ("tipc: smooth change between replicast and broadcast")
Reported-by: Tuong Lien Tong <tuong.t.lien@dektech.com.au>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>