1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/dma-coherent.c b/kernel/dma-coherent.c
index 8056d081609..038707404b7 100644
--- a/kernel/dma-coherent.c
+++ b/kernel/dma-coherent.c
@@ -118,6 +118,8 @@ int dma_alloc_from_coherent(struct device *dev, ssize_t size,
         mem = dev->dma_mem;
         if (!mem)
                 return 0;
+        if (unlikely(size > mem->size))
+                return 0;
 
         pageno = bitmap_find_free_region(mem->bitmap, mem->size, order);
         if (pageno >= 0) {