From 83c5d35bf9112577da097c1b4fbfedef93b951e6 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Thu, 17 Aug 2023 16:58:38 -0700 Subject: dmaengine: apple-admac: Annotate struct admac_data 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 admac_data. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Hector Martin Cc: Sven Peter Cc: Alyssa Rosenzweig Cc: asahi@lists.linux.dev Cc: linux-arm-kernel@lists.infradead.org Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230817235859.49846-1-keescook@chromium.org Signed-off-by: Vinod Koul --- drivers/dma/apple-admac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/dma') diff --git a/drivers/dma/apple-admac.c b/drivers/dma/apple-admac.c index 46bb02858561..5b63996640d9 100644 --- a/drivers/dma/apple-admac.c +++ b/drivers/dma/apple-admac.c @@ -128,7 +128,7 @@ struct admac_data { int irq; int irq_index; int nchannels; - struct admac_chan channels[]; + struct admac_chan channels[] __counted_by(nchannels); }; struct admac_tx { -- cgit v1.2.3