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skbuff: skb_segment: orphan frags before copying
skb_segment copies frags around, so we need to copy them carefully to avoid accessing user memory after reporting completion to userspace through a callback. skb_segment doesn't normally happen on datapath: TSO needs to be disabled - so disabling zero copy in this case does not look like a big deal. Signed-off-by: Michael S. Tsirkin <email@example.com> Acked-by: Herbert Xu <firstname.lastname@example.org> Signed-off-by: David S. Miller <email@example.com>
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