nfsd: ensure sockets are closed on error

One the changes in commit d7979ae4a "svc: Move close processing to a
single place" is:

  err_delete:
-       svc_delete_socket(svsk);
+       set_bit(SK_CLOSE, &svsk->sk_flags);
        return -EAGAIN;

This is insufficient. The recvfrom methods must always call
svc_xprt_received on completion so that the socket gets re-queued if
there is any more work to do.  This particular path did not make that
call because it actually destroyed the svsk, making requeue pointless.
When the svc_delete_socket was change to just set a bit, we should have
added a call to svc_xprt_received,

This is the problem that b0401d7253 attempted to fix, incorrectly.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 9e093910c479..a29f259204e6 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -968,6 +968,7 @@ static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp)
         return len;
  err_delete:
         set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
+        svc_xprt_received(&svsk->sk_xprt);
  err_again:
         return -EAGAIN;
 }