Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH 05/21] dmaengine: hisilicon: Annotate struct hisi_dma_dev with __counted_by | Date | Thu, 17 Aug 2023 16:58:42 -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 hisi_dma_dev.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Vinod Koul <vkoul@kernel.org> Cc: Zhou Wang <wangzhou1@hisilicon.com> Cc: Jie Hai <haijie1@huawei.com> Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- 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
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