Merge tag 'v3.10.108' into update

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / packet / af_packet.c

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 0bbb3470fa7854aabd9c0b07499945127c019901..2f22b0759f2cacccdc70c51769e71fdca50e0a91 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -3183,14 +3183,19 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
 
                if (optlen != sizeof(val))
                        return -EINVAL;
-               if (po->rx_ring.pg_vec || po->tx_ring.pg_vec)
-                       return -EBUSY;
                if (copy_from_user(&val, optval, sizeof(val)))
                        return -EFAULT;
                if (val > INT_MAX)
                        return -EINVAL;
-               po->tp_reserve = val;
-               return 0;
+               lock_sock(sk);
+               if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) {
+                       ret = -EBUSY;
+               } else {
+                       po->tp_reserve = val;
+                       ret = 0;
+               }
+               release_sock(sk);
+               return ret;
        }
        case PACKET_LOSS:
        {
@@ -3338,6 +3343,8 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
        case PACKET_HDRLEN:
                if (len > sizeof(int))
                        len = sizeof(int);
+               if (len < sizeof(int))
+                       return -EINVAL;
                if (copy_from_user(&val, optval, len))
                        return -EFAULT;
                switch (val) {