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Message-ID: <3c42ae53-ca2a-4b99-8010-ca70e4fbad58@embeddedor.com> Date: Fri, 6 Oct 2023 22:46:54 +0200 From: "Gustavo A. R. Silva" <gustavo@...eddedor.com> To: Kees Cook <keescook@...omium.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, linux-hardening@...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 Subject: Re: [PATCH] driver core: platform: Annotate struct irq_affinity_devres with __counted_by On 10/6/23 22:17, 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 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 > irq_affinity_devres. > > Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> > Cc: "Rafael J. Wysocki" <rafael@...nel.org> > Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org> > Cc: linux-hardening@...r.kernel.org > Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] > Signed-off-by: Kees Cook <keescook@...omium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org> Thanks! -- Gustavo > --- > drivers/base/platform.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/base/platform.c b/drivers/base/platform.c > index 76bfcba25003..07216889d3ba 100644 > --- a/drivers/base/platform.c > +++ b/drivers/base/platform.c > @@ -291,7 +291,7 @@ EXPORT_SYMBOL_GPL(platform_irq_count); > > struct irq_affinity_devres { > unsigned int count; > - unsigned int irq[]; > + unsigned int irq[] __counted_by(count); > }; > > static void platform_disable_acpi_irq(struct platform_device *pdev, int index)
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