From: Herbert Xu <redacted>
Date: Wed, 27 Jul 2011 21:10:08 +0800

gro: Only reset frag0 when skb can be pulled

Currently skb_gro_header_slow unconditionally resets frag0 and
frag0_len.  However, when we can't pull on the skb this leaves
the GRO fields in an inconsistent state.

This patch fixes this by only resetting those fields after the
pskb_may_pull test.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Applied, thanks.

I'll queue this up for -stable too.