Messages in this thread | | | Date | Thu, 17 Aug 2023 19:24:34 -0600 | Subject | Re: [PATCH 09/21] dmaengine: sf-pdma: Annotate struct sf_pdma with __counted_by | From | "Gustavo A. R. Silva" <> |
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On 8/17/23 17:58, Kees Cook wrote: > 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 sf_pdma. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Vinod Koul <vkoul@kernel.org> > Cc: Green Wan <green.wan@sifive.com> > Cc: dmaengine@vger.kernel.org > Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Thanks -- Gustavo
> --- > drivers/dma/sf-pdma/sf-pdma.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/dma/sf-pdma/sf-pdma.h b/drivers/dma/sf-pdma/sf-pdma.h > index 5c398a83b491..d05772b5d8d3 100644 > --- a/drivers/dma/sf-pdma/sf-pdma.h > +++ b/drivers/dma/sf-pdma/sf-pdma.h > @@ -113,7 +113,7 @@ struct sf_pdma { > void __iomem *membase; > void __iomem *mappedbase; > u32 n_chans; > - struct sf_pdma_chan chans[]; > + struct sf_pdma_chan chans[] __counted_by(n_chans); > }; > > #endif /* _SF_PDMA_H */
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