commit ca07e43e288956a0ad5e6bd075f7aa1fca3bca00
author Eric Dumazet <edumazet@google.com> Sat Oct 06 22:28:06 2012 +0000
committer David S. Miller <davem@davemloft.net> Sun Oct 07 14:49:17 2012 -0400
tree fa3b345f2940b257f7c1b5b268f2ee52926bcbf5
parent 51ec04038c113a811b177baa85d293feff9ce995

net: gro: fix a potential crash in skb_gro_reset_offset

Before accessing skb first fragment, better make sure there
is one.

This is probably not needed for old kernels, since an ethernet frame
cannot contain only an ethernet header, but the recent GRO addition
to tunnels makes this patch needed.

Also skb_gro_reset_offset() can be static, it actually allows
compiler to inline it.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>