cls_u32: signedness bug
skb_headroom() is unsigned so "skb_headroom(skb) + toff" is also unsigned and can't be less than zero. This test was added in 66d50d25: "u32: negative offset fix" It was supposed to fix a regression. Signed-off-by: NDan Carpenter <error27@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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