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This infrastructure is not used anymore after moving ct timeout and helper to use datapath refcount to track object use. Revert commitc56716c69c("netfilter: extensions: introduce extension genid count") this patch disables all ct extensions (leading to NULL) for unconfirmed conntracks, when this is only targeted at ct helper and ct timeout. There is also codebase that dereferences the ct extension without checking for NULL which could lead to crash. Fixes:c56716c69c("netfilter: extensions: introduce extension genid count") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>