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-rw-r--r--net/core/dev.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index e91390533999..a90737fe2472 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -967,6 +967,14 @@ int dev_set_alias(struct net_device *dev, const char *alias, size_t len)
if (len >= IFALIASZ)
return -EINVAL;
+ if (!len) {
+ if (dev->ifalias) {
+ kfree(dev->ifalias);
+ dev->ifalias = NULL;
+ }
+ return 0;
+ }
+
dev->ifalias = krealloc(dev->ifalias, len+1, GFP_KERNEL);
if (!dev->ifalias)
return -ENOMEM;