From 7935de861aed45f97a4262d9b215d9feb172516b Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Thu, 17 Aug 2023 16:58:57 -0700 Subject: dmaengine: uniphier-xdmac: Annotate struct uniphier_xdmac_device 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 uniphier_xdmac_device. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Kunihiko Hayashi Cc: Masami Hiramatsu Cc: dmaengine@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Kees Cook Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230817235859.49846-20-keescook@chromium.org Signed-off-by: Vinod Koul --- drivers/dma/uniphier-xdmac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/dma') diff --git a/drivers/dma/uniphier-xdmac.c b/drivers/dma/uniphier-xdmac.c index dd51522879a7..3a8ee2b173b5 100644 --- a/drivers/dma/uniphier-xdmac.c +++ b/drivers/dma/uniphier-xdmac.c @@ -97,7 +97,7 @@ struct uniphier_xdmac_device { struct dma_device ddev; void __iomem *reg_base; int nr_chans; - struct uniphier_xdmac_chan channels[]; + struct uniphier_xdmac_chan channels[] __counted_by(nr_chans); }; static struct uniphier_xdmac_chan * -- cgit v1.2.3