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05 April 2024, 19:05:47 UTC
Revision 57031eb794906eea4e1c7b31dc1e2429c0af0c66 authored by Willem de Bruijn on 07 February 2017, 20:57:21 UTC, committed by David S. Miller on 08 February 2017, 18:56:37 UTC 
packet: round up linear to header len
 
Link layer protocols may unconditionally pull headers, as Ethernet
does in eth_type_trans. Ensure that the entire link layer header
always lies in the skb linear segment. tpacket_snd has such a check.
Extend this to packet_snd.

Variable length link layer headers complicate the computation
somewhat. Here skb->len may be smaller than dev->hard_header_len.

Round up the linear length to be at least as long as the smallest of
the two.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 217e6fa
History
Tip revision: 57031eb794906eea4e1c7b31dc1e2429c0af0c66 authored by Willem de Bruijn on 07 February 2017, 20:57:21 UTC
packet: round up linear to header len
Tip revision: 57031eb
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