SUNRPC: Fix an Oops due to socket not set up yet...

We can Oops in both xs_udp_send_request() and xs_tcp_send_request() if the
call to xs_sendpages() returns an error due to the socket not yet being
set up.
Deal with that situation by returning a new error: ENOTSOCK, so that we
know to avoid dereferencing transport->sock.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 5cbb404..a71fefd 100644 (file)
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -467,7 +467,7 @@ static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen,
        int err, sent = 0;
 
        if (unlikely(!sock))
-               return -ENOTCONN;
+               return -ENOTSOCK;
 
        clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags);
        if (base != 0) {
@@ -594,6 +594,10 @@ static int xs_udp_send_request(struct rpc_task *task)
        }
 
        switch (status) {
+       case -ENOTSOCK:
+               status = -ENOTCONN;
+               /* Should we call xs_close() here? */
+               break;
        case -EAGAIN:
                xs_nospace(task);
                break;
@@ -693,6 +697,10 @@ static int xs_tcp_send_request(struct rpc_task *task)
        }
 
        switch (status) {
+       case -ENOTSOCK:
+               status = -ENOTCONN;
+               /* Should we call xs_close() here? */
+               break;
        case -EAGAIN:
                xs_nospace(task);
                break;