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On some hv_sock workloads which quickly open/close many connections occasionally, channel IDs would get re-used while still having work pending. This can cause a kernel crash on a NULL pointer exception. The three patches added to the 4.9.x and 4.10.x kernels fixes these bugs. The patches are being prepared to be upstreamed, but for now we cherry-picked them from the developers tree. Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>