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Message-ID: <495ab28c-b3bc-b690-ddbc-54284143b44e@embeddedor.com> Date: Sat, 23 Sep 2023 10:34:56 -0600 From: "Gustavo A. R. Silva" <gustavo@...eddedor.com> To: Kees Cook <keescook@...omium.org>, Support Opensource <support.opensource@...semi.com> Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.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] regulator: da9063: Annotate struct da9063_regulators with __counted_by On 9/22/23 11:52, 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 da9063_regulators. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Support Opensource <support.opensource@...semi.com> > Cc: Liam Girdwood <lgirdwood@...il.com> > Cc: Mark Brown <broonie@...nel.org> > Signed-off-by: Kees Cook <keescook@...omium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org> Thanks -- Gustavo > --- > drivers/regulator/da9063-regulator.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c > index a0621665a6d2..82bf321ae06f 100644 > --- a/drivers/regulator/da9063-regulator.c > +++ b/drivers/regulator/da9063-regulator.c > @@ -158,7 +158,7 @@ struct da9063_regulator { > struct da9063_regulators { > unsigned int n_regulators; > /* Array size to be defined during init. Keep at end. */ > - struct da9063_regulator regulator[]; > + struct da9063_regulator regulator[] __counted_by(n_regulators); > }; > > /* BUCK modes for DA9063 */
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