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-rw-r--r--net/core/net-sysfs.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 51d5836d8fb9..799b75268291 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -382,7 +382,7 @@ static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr,
struct net_device *netdev = to_net_dev(dev);
struct net *net = dev_net(netdev);
size_t count = len;
- ssize_t ret;
+ ssize_t ret = 0;
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;
@@ -391,9 +391,20 @@ static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr,
if (len > 0 && buf[len - 1] == '\n')
--count;
- ret = dev_set_alias(netdev, buf, count);
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ if (dev_isalive(netdev)) {
+ ret = dev_set_alias(netdev, buf, count);
+ if (ret < 0)
+ goto err;
+ ret = len;
+ netdev_state_change(netdev);
+ }
+err:
+ rtnl_unlock();
- return ret < 0 ? ret : len;
+ return ret;
}
static ssize_t ifalias_show(struct device *dev,