From: Alexander Wirt <[EMAIL PROTECTED]>

Signed-off-by: Andreas Henriksson <[EMAIL PROTECTED]>
---
 ip/iplink.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/ip/iplink.c b/ip/iplink.c
index 4060845..da1f64e 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c
@@ -670,6 +670,10 @@ static int do_set(int argc, char **argv)
        }
 
        if (newname && strcmp(dev, newname)) {
+               if (strlen(newname) == 0) {
+                   printf("\"\" is not valid device identifier\n");
+                   return -1;
+               }
                if (do_changename(dev, newname) < 0)
                        return -1;
                dev = newname;
-- 
1.5.3.4

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