svcrpc: don't error out on small tcp fragment

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.

Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index df74919c81c0..305374d4fb98 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1095,7 +1095,7 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
                 goto err_noclose;
         }
 
-        if (svc_sock_reclen(svsk) < 8) {
+        if (svsk->sk_datalen < 8) {
                 svsk->sk_datalen = 0;
                 goto err_delete; /* client is nuts. */
         }