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Differential D20505

very large dma mappings can cause integer overflow
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Authored by tychon on Jun 3 2019, 5:10 PM.
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rS348571: very large dma mappings can cause integer overflow
Summary

Some integer overflow issues can occur with (very) large DMA mappings. In dmar_bus_dmamap_load_phys() this causes the miscomputation of a physical address. In _bus_dmamap_addseg() it causes a segment to appear truncated.

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rS FreeBSD src repository - subversion
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head/
sys/
arm64/
arm64/
2 lines
x86/
iommu/
2 lines
x86/
2 lines

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head/sys/arm64/arm64/busdma_bounce.c

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head/sys/x86/iommu/busdma_dmar.c

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head/sys/x86/x86/busdma_bounce.c

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