From 8360c11aef5775745fc10438e24db95ab2329b1d Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Thu, 17 Aug 2023 16:58:47 -0700 Subject: [PATCH] dmaengine: sprd: Annotate struct sprd_dma_dev with __counted_by Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct sprd_dma_dev. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Orson Zhai Cc: Baolin Wang Cc: Chunyan Zhang Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook Acked-by: Chunyan Zhang Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230817235859.49846-10-keescook@chromium.org Signed-off-by: Vinod Koul --- drivers/dma/sprd-dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 97e3dedb6c12..0064a5f4f0cb 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -212,7 +212,7 @@ struct sprd_dma_dev { struct clk *ashb_clk; int irq; u32 total_chns; - struct sprd_dma_chn channels[]; + struct sprd_dma_chn channels[] __counted_by(total_chns); }; static void sprd_dma_free_desc(struct virt_dma_desc *vd);