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Message-ID: <436d7488-1a20-b6af-8e3f-f151ba2c210d@embeddedor.com> Date: Sat, 23 Sep 2023 10:37:30 -0600 From: "Gustavo A. R. Silva" <gustavo@...eddedor.com> To: Kees Cook <keescook@...omium.org>, Andy Gross <agross@...nel.org> Cc: Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, Amit Kucheria <amitk@...nel.org>, Thara Gopinath <thara.gopinath@...il.com>, "Rafael J. Wysocki" <rafael@...nel.org>, Daniel Lezcano <daniel.lezcano@...aro.org>, Zhang Rui <rui.zhang@...el.com>, linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org, Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, linux-hardening@...r.kernel.org Subject: Re: [PATCH] drivers: thermal: tsens: Annotate struct tsens_priv with __counted_by On 9/22/23 11:53, 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 tsens_priv. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Andy Gross <agross@...nel.org> > Cc: Bjorn Andersson <andersson@...nel.org> > Cc: Konrad Dybcio <konrad.dybcio@...aro.org> > Cc: Amit Kucheria <amitk@...nel.org> > Cc: Thara Gopinath <thara.gopinath@...il.com> > Cc: "Rafael J. Wysocki" <rafael@...nel.org> > Cc: Daniel Lezcano <daniel.lezcano@...aro.org> > Cc: Zhang Rui <rui.zhang@...el.com> > Cc: linux-arm-msm@...r.kernel.org > Cc: linux-pm@...r.kernel.org > Signed-off-by: Kees Cook <keescook@...omium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org> Thanks -- Gustavo > --- > drivers/thermal/qcom/tsens.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h > index 2805de1c6827..cb637fa289ca 100644 > --- a/drivers/thermal/qcom/tsens.h > +++ b/drivers/thermal/qcom/tsens.h > @@ -585,7 +585,7 @@ struct tsens_priv { > struct dentry *debug_root; > struct dentry *debug; > > - struct tsens_sensor sensor[]; > + struct tsens_sensor sensor[] __counted_by(num_sensors); > }; > > /**
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