Eric Dumazet fbfa743a9d
ipv6: fix ip6_tnl_parse_tlv_enc_lim() ...
This function suffers from multiple issues.
First one is that pskb_may_pull() may reallocate skb->head,
so the 'raw' pointer needs either to be reloaded or not used at all.
Second issue is that NEXTHDR_DEST handling does not validate
that the options are present in skb->data, so we might read
garbage or access non existent memory.
With help from Willem de Bruijn.
Signed-off-by: Eric Dumazet <edumazet@google.com >
Reported-by: Dmitry Vyukov <dvyukov@google.com >
Cc: Willem de Bruijn <willemb@google.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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