Re: [PATCH net-next 1/8] flow_keys: Record IP layer protocol in skb_flow_dissect()

The crash happens 100% on IPoIB (IP-over-Infiniband) [1] interfaces
b/c your upstream commit e0f31d8 "flow_keys: Record IP layer protocol
in skb_flow_dissect()" causes the IPoIB data stashed on skb->cb [2] to
smash other skb fields.

So your 3.17-rc1 commit introduced a regression to how things work
since kernel 3.2

Can please see how to revert this hunk

-- a/include/net/sch_generic.h

+++ b/include/net/sch_generic.h

@@ -231,7 +231,7 @@ struct qdisc_skb_cb {
        unsigned int            pkt_len;
        u16                     slave_dev_queue_mapping;
        u16                     _pad;
-       unsigned char           data[20];
+       unsigned char           data[24];
 };

thanks,

Or.

[1]  http://marc.info/?l=linux-rdma&m=141029109017035&w=2
[2] see these commits

936d7de3 IPoIB: Stop lying about hard_header_len and use skb->cb to
stash LL addresses
a0417fa3  net: Make qdisc_skb_cb upper size bound explicit