diff --git a/[refs] b/[refs]
index 870a9c1f0843..2d4a48a92dae 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 746ae30f821a8533ffba7769e492f59a96fdbeec
+refs/heads/master: 5dc5503f5a400be5a7dc611745a034f04b0679b8
diff --git a/trunk/drivers/isdn/i4l/isdn_net.c b/trunk/drivers/isdn/i4l/isdn_net.c
index 1f73d7f7e024..2339d7396b9e 100644
--- a/trunk/drivers/isdn/i4l/isdn_net.c
+++ b/trunk/drivers/isdn/i4l/isdn_net.c
@@ -2756,6 +2756,9 @@ isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
 			char *c,
 			*e;
 
+			if (strnlen(cfg->drvid, sizeof(cfg->drvid)) ==
+					sizeof(cfg->drvid))
+				return -EINVAL;
 			drvidx = -1;
 			chidx = -1;
 			strcpy(drvid, cfg->drvid);