batman-adv: Check skb size before using encapsulated ETH+VLAN header

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commit c78296665c upstream.

The encapsulated ethernet and VLAN header may be outside the received
ethernet frame. Thus the skb buffer size has to be checked before it can be
parsed to find out if it encapsulates another batman-adv packet.

Fixes: 420193573f ("batman-adv: softif bridge loop avoidance")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Sven Eckelmann 2016-02-26 17:56:13 +01:00 • committed by Greg Kroah-Hartman

parent f9d4649488

commit c6865db3a4

1 changed files with 6 additions and 2 deletions

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net/batman-adv/soft-interface.c

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