SUNRPC: remove BUG_ON in xdr_shrink_bufhead

Replace bounds checking BUG_ON() with a WARN_ON_ONCE() and resetting
the requested len to the max.

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 08f50afd5f2a..56055632f151 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -318,7 +318,10 @@ xdr_shrink_bufhead(struct xdr_buf *buf, size_t len)
 
         tail = buf->tail;
         head = buf->head;
-        BUG_ON (len > head->iov_len);
+
+        WARN_ON_ONCE(len > head->iov_len);
+        if (len > head->iov_len)
+                len = head->iov_len;
 
         /* Shift the tail first */
         if (tail->iov_len != 0) {