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authorLinus Torvalds <torvalds@linux-foundation.org>2022-02-27 12:42:37 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-02-27 12:42:37 -0800
commit98f3e84f8df66f1ac9d04b6d8093993c9bfd69e6 (patch)
tree2b63116b52a5ba74ee2565b3f13454b300947777 /kernel
parent6676ba2a6df6864a6b7b11f20166026e2201b627 (diff)
parentddbd89deb7d32b1fbb879f48d68fda1a8ac58e8e (diff)
Merge tag 'dma-mapping-5.17-1' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fix from Christoph Hellwig: - fix a swiotlb info leak (Halil Pasic) * tag 'dma-mapping-5.17-1' of git://git.infradead.org/users/hch/dma-mapping: swiotlb: fix info leak with DMA_FROM_DEVICE
Diffstat (limited to 'kernel')
-rw-r--r--kernel/dma/swiotlb.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index f1e7ea160b43..bfc56cb21705 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -628,7 +628,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
mem->slots[index + i].orig_addr = slot_addr(orig_addr, i);
tlb_addr = slot_addr(mem->start, index) + offset;
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
- (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL))
+ (!(attrs & DMA_ATTR_OVERWRITE) || dir == DMA_TO_DEVICE ||
+ dir == DMA_BIDIRECTIONAL))
swiotlb_bounce(dev, tlb_addr, mapping_size, DMA_TO_DEVICE);
return tlb_addr;
}