From: John Dykstra <john.dykstra1@gmail.com>
Date: Wed, 11 Mar 2009 16:22:51 +0000 (-0700)
Subject: ipv6:  Fix BUG when disabled ipv6 module is unloaded
X-Git-Tag: firefly_0821_release~15263^2~42
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ff8cf9a93800e8118ea097c1aba7203d59a0f3f1;p=firefly-linux-kernel-4.4.55.git

ipv6:  Fix BUG when disabled ipv6 module is unloaded

Do not try to "uninitialize" ipv6 if its initialization had been skipped
because module parameter disable=1 had been specified.

Reported-by:  Thomas Backlund <tmb@mandriva.org>
Signed-off-by: John Dykstra <john.dykstra1@gmail.com>
Acked-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index da944eca2ca6..9c8309ed35cf 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -1192,6 +1192,9 @@ module_init(inet6_init);
 
 static void __exit inet6_exit(void)
 {
+	if (disable_ipv6)
+		return;
+
 	/* First of all disallow new sockets creation. */
 	sock_unregister(PF_INET6);
 	/* Disallow any further netlink messages */