Merge tag 'nfs-for-4.11-2' of git://git.linux-nfs.org/projects/anna/linux-nfs

[karo-tx-linux.git] / net / packet / af_packet.c

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 2bd0d1949312c3d71c4b33529316dcfe76fa28f1..a0dbe7ca8f724cd33b675ea15fb263d82041994c 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -3103,7 +3103,7 @@ static int packet_bind_spkt(struct socket *sock, struct sockaddr *uaddr,
                            int addr_len)
 {
        struct sock *sk = sock->sk;
-       char name[15];
+       char name[sizeof(uaddr->sa_data) + 1];
 
        /*
         *      Check legality
@@ -3111,7 +3111,11 @@ static int packet_bind_spkt(struct socket *sock, struct sockaddr *uaddr,
 
        if (addr_len != sizeof(struct sockaddr))
                return -EINVAL;
-       strlcpy(name, uaddr->sa_data, sizeof(name));
+       /* uaddr->sa_data comes from the userspace, it's not guaranteed to be
+        * zero-terminated.
+        */
+       memcpy(name, uaddr->sa_data, sizeof(uaddr->sa_data));
+       name[sizeof(uaddr->sa_data)] = 0;
 
        return packet_do_bind(sk, name, 0, pkt_sk(sk)->num);
 }