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very large dma mappings can cause integer overflow

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Reviewed by:	kib
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D20505
This commit is contained in:
Tycho Nightingale 2019-06-03 19:19:35 +00:00
parent ce88141b27
commit 88e9fbe568
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=348571
3 changed files with 3 additions and 3 deletions
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2
sys/arm64/arm64/busdma_bounce.c
View File

@ -660,7 +660,7 @@ _bus_dmamap_reserve_pages(bus_dma_tag_t dmat, bus_dmamap_t map, int flags)
/*
* Add a single contiguous physical range to the segment list.
*/
static int
static bus_size_t
_bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t curaddr,
bus_size_t sgsize, bus_dma_segment_t *segs, int *segp)
{

2
sys/x86/iommu/busdma_dmar.c
View File

@ -686,7 +686,7 @@ dmar_bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map1,
return (ENOMEM);
fma = NULL;
for (i = 0; i < ma_cnt; i++) {
paddr = pstart + i * PAGE_SIZE;
paddr = pstart + ptoa(i);
ma[i] = PHYS_TO_VM_PAGE(paddr);
if (ma[i] == NULL || VM_PAGE_TO_PHYS(ma[i]) != paddr) {
/*

2
sys/x86/x86/busdma_bounce.c
View File

@ -667,7 +667,7 @@ _bus_dmamap_reserve_pages(bus_dma_tag_t dmat, bus_dmamap_t map, int flags)
/*
* Add a single contiguous physical range to the segment list.
*/
static int
static bus_size_t
_bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t curaddr,
bus_size_t sgsize, bus_dma_segment_t *segs, int *segp)
{