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-rw-r--r--drivers/net/tun.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index f0db770e8b2f..88bb8cc3555b 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1095,6 +1095,9 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
u32 rxhash;
ssize_t n;
+ if (!(tun->dev->flags & IFF_UP))
+ return -EIO;
+
if (!(tun->flags & IFF_NO_PI)) {
if (len < sizeof(pi))
return -EINVAL;