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Message-ID: <ccaf9c7e-7628-4e70-a054-246b4edfbeff@quicinc.com> Date: Fri, 15 Sep 2023 13:38:53 -0700 From: Jeff Johnson <quic_jjohnson@...cinc.com> To: Kees Cook <keescook@...omium.org>, Kalle Valo <kvalo@...nel.org> CC: <ath10k@...ts.infradead.org>, <linux-wireless@...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] wifi: ath10k: Annotate struct ath10k_ce_ring with __counted_by On 9/15/2023 1:06 PM, 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 ath10k_ce_ring. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Kalle Valo <kvalo@...nel.org> > Cc: Jeff Johnson <quic_jjohnson@...cinc.com> > Cc: ath10k@...ts.infradead.org > Cc: linux-wireless@...r.kernel.org > Signed-off-by: Kees Cook <keescook@...omium.org> Acked-by: Jeff Johnson <quic_jjohnson@...cinc.com> > --- > drivers/net/wireless/ath/ath10k/ce.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/ath/ath10k/ce.h b/drivers/net/wireless/ath/ath10k/ce.h > index 666ce384a1d8..27367bd64e95 100644 > --- a/drivers/net/wireless/ath/ath10k/ce.h > +++ b/drivers/net/wireless/ath/ath10k/ce.h > @@ -110,7 +110,7 @@ struct ath10k_ce_ring { > struct ce_desc_64 *shadow_base; > > /* keep last */ > - void *per_transfer_context[]; > + void *per_transfer_context[] __counted_by(nentries); > }; > > struct ath10k_ce_pipe {
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