Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
iommu/dma-iommu: Fix wrong scatterlist length assignment in P2PDMA path
In iommu_dma_map_sg(), when handling PCI P2PDMA cases, the DMA length
of the current scatterlist segment s is incorrectly assigned from the
head entry sg->length instead of the current entry s->length.
This typo causes all P2PDMA segments in the scatterlist to inherit the length of the first segment, leading to corrupted DMA lengths for multi- segment scatterlists.
Fix this by using s->length instead of sg->length.
Details
- Affected product:
- Debian 10 ELS
- Affected packages:
- linux @ 4.19.0