Messages in this thread | | | Date | Thu, 17 Aug 2023 19:24:00 -0600 | Subject | Re: [PATCH 07/21] dmaengine: qcom: bam_dma: Annotate struct bam_async_desc with __counted_by | From | "Gustavo A. R. Silva" <> |
| |
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 bam_async_desc. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Vinod Koul <vkoul@kernel.org> > Cc: Andy Gross <agross@kernel.org> > Cc: Bjorn Andersson <andersson@kernel.org> > Cc: Konrad Dybcio <konrad.dybcio@linaro.org> > Cc: linux-arm-msm@vger.kernel.org > 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/qcom/bam_dma.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c > index 4c3eb972039d..65b89bb7a56b 100644 > --- a/drivers/dma/qcom/bam_dma.c > +++ b/drivers/dma/qcom/bam_dma.c > @@ -74,7 +74,7 @@ struct bam_async_desc { > struct list_head desc_node; > enum dma_transfer_direction dir; > size_t length; > - struct bam_desc_hw desc[]; > + struct bam_desc_hw desc[] __counted_by(num_desc); > }; > > enum bam_reg {
| |