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This mismatch causes an out-of-bounds issue: 1. d40_of_probe() accepts up to 8 memcpy channels from DT (num_memcpy > D40_MEMCPY_MAX_CHANS allows 7-8), then writes them into the 6-element dma40_memcpy_channels[], corrupting adjacent stack memory. Fix by defining D40_MEMCPY_MAX_CHANS as 6 to match the array size. Fixes: a7dacb68b35a ("dmaengine: ste_dma40: Allow memcpy channels to be configured from DT") Assisted-by: Opencode:Big-Pickle Signed-off-by: Rosen Penev --- drivers/dma/ste_dma40.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 0d9ffa3e2663..c45643b7f415 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -86,7 +86,7 @@ struct stedma40_platform_data { #define D40_ALLOC_PHY BIT(30) #define D40_ALLOC_LOG_FREE 0 -#define D40_MEMCPY_MAX_CHANS 8 +#define D40_MEMCPY_MAX_CHANS 6 /* Reserved event lines for memcpy only. */ #define DB8500_DMA_MEMCPY_EV_0 51 -- 2.54.0