Messages in this thread | | | Date | Thu, 17 Aug 2023 20:15:24 -0600 | Subject | Re: [PATCH 17/21] dmaengine: ti: edma: Annotate struct edma_desc 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 edma_desc. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Vinod Koul <vkoul@kernel.org> > Cc: Peter Ujfalusi <peter.ujfalusi@gmail.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/ti/edma.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c > index aa8e2e8ac260..9c2b2c4c3882 100644 > --- a/drivers/dma/ti/edma.c > +++ b/drivers/dma/ti/edma.c > @@ -202,7 +202,7 @@ struct edma_desc { > u32 residue; > u32 residue_stat; > > - struct edma_pset pset[]; > + struct edma_pset pset[] __counted_by(pset_nr); > }; > > struct edma_cc;
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