Merge remote-tracking branch 'stable/linux-3.0.y' into android-3.0

[firefly-linux-kernel-4.4.55.git] / drivers / net / tun.c

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 76b865065679c756003bdbc3dbb7d491d0b4fd97..3cc22b9eda534fc5f4d053601a60b3dfbda06f0c 100644 (file)
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1245,10 +1245,12 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
        }
 #endif
 
-       if (cmd == TUNSETIFF || _IOC_TYPE(cmd) == 0x89)
+       if (cmd == TUNSETIFF || _IOC_TYPE(cmd) == 0x89) {
                if (copy_from_user(&ifr, argp, ifreq_len))
                        return -EFAULT;
-
+       } else {
+               memset(&ifr, 0, sizeof(ifr));
+       }
        if (cmd == TUNGETFEATURES) {
                /* Currently this just means: "what IFF flags are valid?".
                 * This is needed because we never checked for invalid flags on