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authorBen Hutchings <ben@decadent.org.uk>2014-10-30 19:27:12 +0100
committerDavid S. Miller <davem@davemloft.net>2014-10-31 01:01:18 +0100
commit3d0ad09412ffe00c9afa201d01effdb6023d09b4 (patch)
tree5244d50331be01616a16bf6f122a8769a1a928d8 /drivers/hwspinlock
parentnet: skb_fclone_busy() needs to detect orphaned skb (diff)
downloadlinux-3d0ad09412ffe00c9afa201d01effdb6023d09b4.tar.xz
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drivers/net: Disable UFO through virtio
IPv6 does not allow fragmentation by routers, so there is no fragmentation ID in the fixed header. UFO for IPv6 requires the ID to be passed separately, but there is no provision for this in the virtio net protocol. Until recently our software implementation of UFO/IPv6 generated a new ID, but this was a bug. Now we will use ID=0 for any UFO/IPv6 packet passed through a tap, which is even worse. Unfortunately there is no distinction between UFO/IPv4 and v6 features, so disable UFO on taps and virtio_net completely until we have a proper solution. We cannot depend on VM managers respecting the tap feature flags, so keep accepting UFO packets but log a warning the first time we do this. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Fixes: 916e4cf46d02 ("ipv6: reuse ip6_frag_id from ip6_ufo_append_data") Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/hwspinlock')
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