Messages in this thread | | | Date | Fri, 6 Oct 2023 22:45:10 +0200 | Subject | Re: [PATCH] wifi: intersil: hostap: Annotate struct prism2_download_data with __counted_by | From | "Gustavo A. R. Silva" <> |
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On 10/6/23 22:19, 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 > prism2_download_data. > > Cc: Kalle Valo <kvalo@kernel.org> > Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> > Cc: linux-wireless@vger.kernel.org > Cc: linux-hardening@vger.kernel.org > Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] > Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Thanks! -- Gustavo
> --- > drivers/net/wireless/intersil/hostap/hostap_wlan.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/intersil/hostap/hostap_wlan.h b/drivers/net/wireless/intersil/hostap/hostap_wlan.h > index c25cd21d18bd..f71c0545c0be 100644 > --- a/drivers/net/wireless/intersil/hostap/hostap_wlan.h > +++ b/drivers/net/wireless/intersil/hostap/hostap_wlan.h > @@ -617,7 +617,7 @@ struct prism2_download_data { > u32 addr; /* wlan card address */ > u32 len; > u8 *data; /* allocated data */ > - } data[]; > + } data[] __counted_by(num_areas); > }; > >
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