From: Eric Dumazet <edumazet@google.com>
Date: Sat, 13 Jun 2015 02:31:32 +0000 (-0700)
Subject: flow_dissector: fix ipv6 dst, hop-by-hop and routing ext hdrs
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~134^2~72
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1e98a0f08abddde87f0f93237f10629ecb4880ef;p=pandora-kernel.git

flow_dissector: fix ipv6 dst, hop-by-hop and routing ext hdrs

__skb_header_pointer() returns a pointer that must be checked.

Fixes infinite loop reported by Alexei, and add __must_check to
catch these errors earlier.

Fixes: 6a74fcf426f5 ("flow_dissector: add support for dst, hop-by-hop and routing ext hdrs")
Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Tested-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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