In dma_cache_maint_page(), if offset is larger than PAGE_SIZE,
len becomes PAGE_SIZE - offset. If size is smaller than
PAGE_SIZE - offset, next calcuation of left cause overflow.
Signed-off-by: KyongHo Cho <pullip.cho@xxxxxxxxxxx>
---
arch/arm/mm/dma-mapping.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 1aa664a..14f53b6 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -517,7 +517,7 @@ static void dma_cache_maint_page(struct page *page, unsigned long offset,
page += offset / PAGE_SIZE;
offset %= PAGE_SIZE;
}
- len = PAGE_SIZE - offset;
+ len = min_t(size_t, PAGE_SIZE - offset, len);
}
vaddr = kmap_high_get(page);
if (vaddr) {
--
1.7.1
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