very large dma mappings can cause integer overflow
Reviewed by: kib Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D20505
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parent
ce88141b27
commit
88e9fbe568
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=348571
@ -660,7 +660,7 @@ _bus_dmamap_reserve_pages(bus_dma_tag_t dmat, bus_dmamap_t map, int flags)
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/*
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* Add a single contiguous physical range to the segment list.
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*/
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static int
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static bus_size_t
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_bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t curaddr,
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bus_size_t sgsize, bus_dma_segment_t *segs, int *segp)
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{
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@ -686,7 +686,7 @@ dmar_bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map1,
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return (ENOMEM);
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fma = NULL;
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for (i = 0; i < ma_cnt; i++) {
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paddr = pstart + i * PAGE_SIZE;
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paddr = pstart + ptoa(i);
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ma[i] = PHYS_TO_VM_PAGE(paddr);
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if (ma[i] == NULL || VM_PAGE_TO_PHYS(ma[i]) != paddr) {
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/*
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@ -667,7 +667,7 @@ _bus_dmamap_reserve_pages(bus_dma_tag_t dmat, bus_dmamap_t map, int flags)
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/*
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* Add a single contiguous physical range to the segment list.
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*/
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static int
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static bus_size_t
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_bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t curaddr,
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bus_size_t sgsize, bus_dma_segment_t *segs, int *segp)
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{
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