From b9fe0bd5903140cc3e1ae4e542ae7ff38c90d011 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Thu, 17 Aug 2023 16:58:44 -0700 Subject: dmaengine: qcom: bam_dma: Annotate struct bam_async_desc 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 bam_async_desc. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Andy Gross Cc: Bjorn Andersson Cc: Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230817235859.49846-7-keescook@chromium.org Signed-off-by: Vinod Koul --- drivers/dma/qcom/bam_dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/dma') diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c index c4f8d17d0c68..5e7d332731e0 100644 --- a/drivers/dma/qcom/bam_dma.c +++ b/drivers/dma/qcom/bam_dma.c @@ -74,7 +74,7 @@ struct bam_async_desc { struct list_head desc_node; enum dma_transfer_direction dir; size_t length; - struct bam_desc_hw desc[]; + struct bam_desc_hw desc[] __counted_by(num_desc); }; enum bam_reg { -- cgit v1.2.3