From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
When CONFIG_DMA_ENGINE_RAID is defined, unmap_pool[] is just 1
element in size, however, allows orders of 2..8 to access
outside unmap_pool and returns an invalid address. Ensure
we fall into the default path and report a BUG() when
CONFIG_DMA_ENGINE_RAID is defined and order is out of range.
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
drivers/dma/dmaengine.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 8c9f45f..6027e66 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -1100,12 +1100,14 @@ static struct dmaengine_unmap_pool *__get_unmap_pool(int nr)
switch (order) {
case 0 ... 1:
return &unmap_pool[0];
+ #if IS_ENABLED(CONFIG_DMA_ENGINE_RAID)
case 2 ... 4:
return &unmap_pool[1];
case 5 ... 7:
return &unmap_pool[2];
case 8:
return &unmap_pool[3];
+ #endif
default:
BUG();
return NULL;
--
2.8.1
--
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