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@xxxxxxxxxx> Cc: Laxman Dewangan <ldewangan@xxxxxxxxxx> Cc: Jon Hunter <jonathanh@xxxxxxxxxx> Cc: Thierry Reding <thierry.reding@xxxxxxxxx> Cc: dmaengine@xxxxxxxxxxxxxxx Cc: linux-tegra@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- 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
