[PATCH 2/3] af_802154: Disable auto-loading as mitigation against local exploits

Forwarded: not-needed

Recent review has revealed several bugs in obscure protocol
implementations that can be exploited by local users for denial of
service or privilege escalation.  We can mitigate the effect of any
remaining vulnerabilities in such protocols by preventing unprivileged
users from loading the modules, so that they are only exploitable on
systems where the administrator has chosen to load the protocol.

The 'af_802154' (IEEE 802.15.4) protocol is not widely used, was
not present in the 'lenny' kernel, and seems to receive only sporadic
maintenance.  Therefore disable auto-loading.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Gbp-Pq: Topic debian
Gbp-Pq: Name af_802154-Disable-auto-loading-as-mitigation-against.patch

diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index 18d267921bb53152eba295a5456525f3f97ee1d0..786cd34c54cf0b0ef8a8758e9f9ddf3721af1ab8 100644 (file)
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -1140,4 +1140,4 @@ module_exit(af_ieee802154_remove);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("IEEE 802.15.4 socket interface");
-MODULE_ALIAS_NETPROTO(PF_IEEE802154);
+/* MODULE_ALIAS_NETPROTO(PF_IEEE802154); */