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 hisi_dma_dev. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul <vkoul@xxxxxxxxxx> Cc: Zhou Wang <wangzhou1@xxxxxxxxxxxxx> Cc: Jie Hai <haijie1@xxxxxxxxxx> Cc: dmaengine@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- drivers/dma/hisi_dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c index c1350a36fddd..4c47bff81064 100644 --- a/drivers/dma/hisi_dma.c +++ b/drivers/dma/hisi_dma.c @@ -163,7 +163,7 @@ struct hisi_dma_dev { u32 chan_depth; enum hisi_dma_reg_layout reg_layout; void __iomem *queue_base; /* queue region start of register */ - struct hisi_dma_chan chan[]; + struct hisi_dma_chan chan[] __counted_by(chan_num); }; #ifdef CONFIG_DEBUG_FS -- 2.34.1
