ipv6: sr: fix incorrect unregister order

[ Upstream commit 6e370a7 ]

Commit 5559cea ("ipv6: sr: fix possible use-after-free and
null-ptr-deref") changed the register order in seg6_init(). But the
unregister order in seg6_exit() is not updated.

Fixes: 5559cea ("ipv6: sr: fix possible use-after-free and null-ptr-deref")
Signed-off-by: Hangbin Liu <[email protected]>
Reviewed-by: Sabrina Dubroca <[email protected]>
Reviewed-by: David Ahern <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
FOF: 0724
Signed-off-by: Alok Tiwari <[email protected]>

Author: liuhangbin

net/ipv6/seg6.c

@@ -495,6 +495,6 @@ void seg6_exit(void)
 #ifdef CONFIG_IPV6_SEG6_LWTUNNEL
 	seg6_iptunnel_exit();
 #endif
-	unregister_pernet_subsys(&ip6_segments_ops);
 	genl_unregister_family(&seg6_genl_family);
+	unregister_pernet_subsys(&ip6_segments_ops);
 }