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When we initialize nlmsghdr with no payload inside tipc_nl_compat_dumpit() the parsing function returns -EINVAL. We fix it by making the parsing call conditional. Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au> Link: https://lore.kernel.org/r/20201215033151.76139-1-hoang.h.le@dektech.com.au Signed-off-by: Jakub Kicinski <kuba@kernel.org>