From 32b5e2d7cd14c80de1fa1cdffcc6ec211b615d82 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Thu, 17 Aug 2023 16:58:52 -0700 Subject: [PATCH] dmaengine: tegra: Annotate struct tegra_dma_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 tegra_dma_desc. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Laxman Dewangan Cc: Jon Hunter Cc: Thierry Reding Cc: dmaengine@vger.kernel.org Cc: linux-tegra@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230817235859.49846-15-keescook@chromium.org Signed-off-by: Vinod Koul --- drivers/dma/tegra186-gpc-dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c index 868c18cc72b1..fa4d4142a68a 100644 --- a/drivers/dma/tegra186-gpc-dma.c +++ b/drivers/dma/tegra186-gpc-dma.c @@ -221,7 +221,7 @@ struct tegra_dma_desc { unsigned int sg_count; struct virt_dma_desc vd; struct tegra_dma_channel *tdc; - struct tegra_dma_sg_req sg_req[]; + struct tegra_dma_sg_req sg_req[] __counted_by(sg_count); }; /*