[LLC]: Fix for Bugzilla ticket #5156

Signed-off-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index a75b8f2aab19..0607cd3fd12c 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -296,6 +296,12 @@ static int llc_ui_bind(struct socket *sock, struct sockaddr *uaddr, int addrlen)
         rc = -EAFNOSUPPORT;
         if (unlikely(addr->sllc_family != AF_LLC))
                 goto out;
+        rc = -ENODEV;
+        rtnl_lock();
+        llc->dev = dev_getbyhwaddr(addr->sllc_arphrd, addr->sllc_mac);
+        rtnl_unlock();
+        if (!llc->dev)
+                goto out;
         if (!addr->sllc_sap) {
                 rc = -EUSERS;
                 addr->sllc_sap = llc_ui_autoport();