https://github.com/torvalds/linux
Revision 3b55e4422087f9f7b241031d758a0c65584e4297 authored by Sven Eckelmann on 26 June 2016, 09:16:12 UTC, committed by David S. Miller on 29 June 2016, 08:01:48 UTC
The skb_linearize may reallocate the skb. This makes the calculated pointer
for ethhdr invalid. But it the pointer is used later to fill in the RR
field of the batadv_icmp_packet_rr packet.

Instead re-evaluate eth_hdr after the skb_linearize+skb_cow to fix the
pointer and avoid the invalid read.

Fixes: da6b8c20a5b8 ("batman-adv: generalize batman-adv icmp packet handling")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent baceced
History
Tip revision: 3b55e4422087f9f7b241031d758a0c65584e4297 authored by Sven Eckelmann on 26 June 2016, 09:16:12 UTC
batman-adv: Fix ICMP RR ethernet access after skb_linearize
Tip revision: 3b55e44
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