From: Bernie Harris <bernie.har...@alliedtelesis.co.nz> Date: Mon, 22 Feb 2016 12:58:05 +1300
> IPCB may contain data from previous layers (in the observed case the > qdisc layer). In the observed scenario, the data was misinterpreted as > ip header options, which later caused the ihl to be set to an invalid > value (<5). This resulted in an infinite loop in the mips implementation > of ip_fast_csum. > > This patch clears IPCB(skb)->opt before dst_link_failure can be called for > various types of tunnels. This change only applies to encapsulated ipv4 > packets. > > The code introduced in 11c21a30 which clears all of IPCB has been removed > to be consistent with these changes, and instead the opt field is cleared > unconditionally in ip_tunnel_xmit. The change in ip_tunnel_xmit applies to > SIT, GRE, and IPIP tunnels. > > The relevant vti, l2tp, and pptp functions already contain similar code for > clearing the IPCB. > > Signed-off-by: Bernie Harris <bernie.har...@alliedtelesis.co.nz> Applied and queued up for -stable, thanks!
