[PATCH] PATCH - RPC/TCP 4 of 4 - Handle short read when reading RPC/TCP packet length

The code already copes with the possibility of having
read some of the 4byte length but not all, but can never
get into that situation.  We just need to add a 'return'
for the case where read got some data but not enough.
Either 0 or -EAGAIN could be returned, they both have the
same effect.

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index ea15fcb2648e21a01511f60b9b3b8afe3b5783bf..ab28937c1dcd268c22204413f822cbf1fa015ace 100644 (file)
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -811,6 +811,9 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
                        goto error;
                svsk->sk_tcplen += len;
 
+               if (len < want)
+                       return 0;
+
                svsk->sk_reclen = ntohl(svsk->sk_reclen);
                if (!(svsk->sk_reclen & 0x80000000)) {
                        /* FIXME: technically, a record can be fragmented,