[ 076/103] svcrpc: dont error out on small tcp fragment

[Greg Kroah-Hartman]

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "J. Bruce Fields" <bfields@xxxxxxxxxx>

commit 1f691b07c5dc51b2055834f58c0f351defd97f27 upstream.

Though clients we care about mostly don't do this, it is possible for
rpc requests to be sent in multiple fragments.  Here we have a sanity
check to ensure that the final received rpc isn't too small--except that
the number we're actually checking is the length of just the final
fragment, not of the whole rpc.  So a perfectly legal rpc that's
unluckily fragmented could cause the server to close the connection
here.

Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 net/sunrpc/svcsock.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1095,7 +1095,7 @@ static int svc_tcp_recvfrom(struct svc_r
 		goto err_noclose;
 	}
 
-	if (svc_sock_reclen(svsk) < 8) {
+	if (svsk->sk_datalen < 8) {
 		svsk->sk_datalen = 0;
 		goto err_delete; /* client is nuts. */
 	}


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