Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH 15/21] dmaengine: tegra: Annotate struct tegra_dma_desc with __counted_by | Date | Thu, 17 Aug 2023 16:58:52 -0700 |
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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 <vkoul@kernel.org> Cc: Laxman Dewangan <ldewangan@nvidia.com> Cc: Jon Hunter <jonathanh@nvidia.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: dmaengine@vger.kernel.org Cc: linux-tegra@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- 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 33b101001100..5e3d5f5d1e20 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); }; /* -- 2.34.1
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