diff options
| -rw-r--r-- | net/tipc/socket.c | 38 |
1 files changed, 15 insertions, 23 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 125dcb0737b2..d45a294f47e9 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -289,7 +289,7 @@ static int release(struct socket *sock) if (buf == NULL) break; atomic_dec(&tipc_queue_size); - if (TIPC_SKB_CB(buf)->handle != msg_data(buf_msg(buf))) + if (TIPC_SKB_CB(buf)->handle != 0) buf_discard(buf); else { if ((sock->state == SS_CONNECTING) || @@ -917,9 +917,6 @@ static int recv_msg(struct kiocb *iocb, struct socket *sock, /* Catch invalid receive requests */ - if (m->msg_iovlen != 1) - return -EOPNOTSUPP; /* Don't do multiple iovec entries yet */ - if (unlikely(!buf_len)) return -EINVAL; @@ -991,11 +988,10 @@ restart: sz = buf_len; m->msg_flags |= MSG_TRUNC; } - if (unlikely(copy_to_user(m->msg_iov->iov_base, msg_data(msg), - sz))) { - res = -EFAULT; + res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg), + m->msg_iov, sz); + if (res) goto exit; - } res = sz; } else { if ((sock->state == SS_READY) || @@ -1041,16 +1037,11 @@ static int recv_stream(struct kiocb *iocb, struct socket *sock, unsigned int sz; int sz_to_copy, target, needed; int sz_copied = 0; - char __user *crs = m->msg_iov->iov_base; - unsigned char *buf_crs; u32 err; int res = 0; /* Catch invalid receive attempts */ - if (m->msg_iovlen != 1) - return -EOPNOTSUPP; /* Don't do multiple iovec entries yet */ - if (unlikely(!buf_len)) return -EINVAL; @@ -1112,24 +1103,25 @@ restart: /* Capture message data (if valid) & compute return value (always) */ if (!err) { - buf_crs = (unsigned char *)(TIPC_SKB_CB(buf)->handle); - sz = (unsigned char *)msg + msg_size(msg) - buf_crs; + u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); + sz -= offset; needed = (buf_len - sz_copied); sz_to_copy = (sz <= needed) ? sz : needed; - if (unlikely(copy_to_user(crs, buf_crs, sz_to_copy))) { - res = -EFAULT; + + res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset, + m->msg_iov, sz_to_copy); + if (res) goto exit; - } + sz_copied += sz_to_copy; if (sz_to_copy < sz) { if (!(flags & MSG_PEEK)) - TIPC_SKB_CB(buf)->handle = buf_crs + sz_to_copy; + TIPC_SKB_CB(buf)->handle = + (void *)(unsigned long)(offset + sz_to_copy); goto exit; } - - crs += sz_to_copy; } else { if (sz_copied != 0) goto exit; /* can't add error msg to valid data */ @@ -1256,7 +1248,7 @@ static u32 filter_rcv(struct sock *sk, struct sk_buff *buf) /* Enqueue message (finally!) */ - TIPC_SKB_CB(buf)->handle = msg_data(msg); + TIPC_SKB_CB(buf)->handle = 0; atomic_inc(&tipc_queue_size); __skb_queue_tail(&sk->sk_receive_queue, buf); @@ -1608,7 +1600,7 @@ restart: buf = __skb_dequeue(&sk->sk_receive_queue); if (buf) { atomic_dec(&tipc_queue_size); - if (TIPC_SKB_CB(buf)->handle != msg_data(buf_msg(buf))) { + if (TIPC_SKB_CB(buf)->handle != 0) { buf_discard(buf); goto restart; } |