Description
In the Linux kernel, the following vulnerability has been resolved: parisc: fix a possible DMA corruption ARCH_DMA_MINALIGN was defined as 16 - this is too small - it may be possible that two unrelated 16-byte allocations share a cache line. If one of these allocations is written using DMA and the other is written using cached write, the value that was written with DMA may be corrupted. This commit changes ARCH_DMA_MINALIGN to be 128 on PA20 and 32 on PA1.1 - that's the largest possible cache line size. As different parisc microarchitectures have different cache line size, we define arch_slab_minalign(), cache_line_size() and dma_get_cache_alignment() so that the kernel may tune slab cache parameters dynamically, based on the detected cache line size.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a01fece2e4185ac173abd16d10304d73d47ebf00 to < 00baca74fb5879e5f9034b6156671301f500f8eeaffecteda01fece2e4185ac173abd16d10304d73d47ebf00 to < 642a0b7453daff0295310774016fcb56d1f5bc7faffecteda01fece2e4185ac173abd16d10304d73d47ebf00 to < 533de2f470baac40d3bf622fe631f15231a03c9faffecteda01fece2e4185ac173abd16d10304d73d47ebf00 to < 7ae04ba36b381bffe2471eff3a93edced843240faffected
Linux Linux
Default version status: affected
4.4affected0 to < 4.4unaffected6.1.119 to ≤ 6.1.*unaffected6.6.46 to ≤ 6.6.*unaffected6.10.5 to ≤ 6.10.*unaffected6.11 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/00baca74fb5879e5f9034b6156671301f500f8ee ↗
- https://git.kernel.org/stable/c/642a0b7453daff0295310774016fcb56d1f5bc7f ↗
- https://git.kernel.org/stable/c/533de2f470baac40d3bf622fe631f15231a03c9f ↗
- https://git.kernel.org/stable/c/7ae04ba36b381bffe2471eff3a93edced843240f ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗