svcrdma: clean up error paths.

These fixes resolved crashes due to resource leak BUG_ON checks. The
resource leaks were detected by introducing asynchronous transport errors.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
index 6c26a67..8b510c5 100644 (file)
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -183,6 +183,7 @@ static int fast_reg_xdr(struct svcxprt_rdma *xprt,
 
  fatal_err:
        printk("svcrdma: Error fast registering memory for xprt %p\n", xprt);
+       vec->frmr = NULL;
        svc_rdma_put_frmr(xprt, frmr);
        return -EIO;
 }
@@ -516,6 +517,7 @@ static int send_reply(struct svcxprt_rdma *rdma,
                       "svcrdma: could not post a receive buffer, err=%d."
                       "Closing transport %p.\n", ret, rdma);
                set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags);
+               svc_rdma_put_frmr(rdma, vec->frmr);
                svc_rdma_put_context(ctxt, 0);
                return -ENOTCONN;
        }
@@ -606,6 +608,7 @@ static int send_reply(struct svcxprt_rdma *rdma,
        return 0;
 
  err:
+       svc_rdma_unmap_dma(ctxt);
        svc_rdma_put_frmr(rdma, vec->frmr);
        svc_rdma_put_context(ctxt, 1);
        return -EIO;

diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 3d810e7..4b0c2fa 100644 (file)
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -520,8 +520,9 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt)
        svc_xprt_get(&xprt->sc_xprt);
        ret = ib_post_recv(xprt->sc_qp, &recv_wr, &bad_recv_wr);
        if (ret) {
-               svc_xprt_put(&xprt->sc_xprt);
+               svc_rdma_unmap_dma(ctxt);
                svc_rdma_put_context(ctxt, 1);
+               svc_xprt_put(&xprt->sc_xprt);
        }
        return ret;