Commit: 52d6a05bdf8a ("netfilter: ip6_tables: guard ip6t_unregister_table_pre_exit against NULL ops")
	Fixes tag: Fixes: ee177a54413a ("netfilter: ip6_tables: Use xt_register_table()")
	Has these problem(s):
		- Subject does not match target commit subject
		  Just use
			git log -1 --format='Fixes: %h ("%s")'