net: fix skb_seq_read returning wrong offset/length for page frag data
When called with a consumed value that is less than skb_headlen(skb) bytes into a page frag, skb_seq_read() incorrectly returns an offset/length relative to skb->data. Ensure that data which should come from a page frag does. Signed-off-by: NThomas Chenault <thomas_chenault@dell.com> Tested-by: NShyam Iyer <shyam_iyer@dell.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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