Author: sephe
Date: Wed Sep 21 06:43:52 2016
New Revision: 306074
URL: https://svnweb.freebsd.org/changeset/base/306074

Log:
  hyperv/vmbus: Assert that the bufring address is page aligned.
  
  MFC after:    1 week
  Sponsored by: Microsoft
  Differential Revision:        https://reviews.freebsd.org/D7962

Modified:
  head/sys/dev/hyperv/vmbus/vmbus_chan.c

Modified: head/sys/dev/hyperv/vmbus/vmbus_chan.c
==============================================================================
--- head/sys/dev/hyperv/vmbus/vmbus_chan.c      Wed Sep 21 06:27:42 2016        
(r306073)
+++ head/sys/dev/hyperv/vmbus/vmbus_chan.c      Wed Sep 21 06:43:52 2016        
(r306074)
@@ -250,6 +250,8 @@ vmbus_chan_open_br(struct vmbus_channel 
            ("send bufring size is not multiple page"));
        KASSERT((rxbr_size & PAGE_MASK) == 0,
            ("recv bufring size is not multiple page"));
+       KASSERT((cbr->cbr_paddr & PAGE_MASK) == 0,
+           ("bufring is not page aligned"));
 
        /*
         * Zero out the TX/RX bufrings, in case that they were used before.
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