svn commit: r348687 - head/sys/x86/iommu

[Tycho Nightingale]

Author: tychon
Date: Wed Jun  5 13:08:21 2019
New Revision: 348687
URL: https://svnweb.freebsd.org/changeset/base/348687

Log:
  another occurrence where a very large dma mapping can cause integer overflow
  
  Submitted by:	rlibby
  Sponsored by:	Dell EMC Isilon

Modified:
  head/sys/x86/iommu/busdma_dmar.c

Modified: head/sys/x86/iommu/busdma_dmar.c
==============================================================================
--- head/sys/x86/iommu/busdma_dmar.c	Wed Jun  5 12:53:36 2019	(r348686)
+++ head/sys/x86/iommu/busdma_dmar.c	Wed Jun  5 13:08:21 2019	(r348687)
@@ -702,7 +702,7 @@ dmar_bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmam
 					return (ENOMEM);
 				}
 			}
-			vm_page_initfake(&fma[i], pstart + i * PAGE_SIZE,
+			vm_page_initfake(&fma[i], pstart + ptoa(i),
 			    VM_MEMATTR_DEFAULT);
 			ma[i] = &fma[i];
 		}