ping: Check return value of function 'ping_queue_rcv_skb'
Function 'ping_queue_rcv_skb' not always return success, which will also return fail. If not check the wrong return value of it, lead to function `ping_rcv` return success. Signed-off-by:Zheng Yongjun <zhengyongjun3@huawei.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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