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authorMichael S. Tsirkin <mst@redhat.com>2011-08-31 08:03:29 +0000
committerDavid S. Miller <davem@davemloft.net>2011-09-15 14:49:44 -0400
commit48c830120f2a20b44220aa26feda9ed15f49eaab (patch)
tree5a9bfdf7493cf53e59350b82d5c3c9017fe403a5 /net/ethernet
parent0542b69e2c57fc9668ce6a03155bea6e1f557901 (diff)
net: copy userspace buffers on device forwarding
dev_forward_skb loops an skb back into host networking stack which might hang on the memory indefinitely. In particular, this can happen in macvtap in bridged mode. Copy the userspace fragments to avoid blocking the sender in that case. As this patch makes skb_copy_ubufs extern now, I also added some documentation and made it clear the SKBTX_DEV_ZEROCOPY flag automatically instead of doing it in all callers. This can be made into a separate patch if people feel it's worth it. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ethernet')
0 files changed, 0 insertions, 0 deletions

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