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Message-Id: <20231006201901.work.278-kees@kernel.org> Date: Fri, 6 Oct 2023 13:19:02 -0700 From: Kees Cook <keescook@...omium.org> To: Kalle Valo <kvalo@...nel.org> Cc: Kees Cook <keescook@...omium.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, linux-wireless@...r.kernel.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: [PATCH] wifi: intersil: hostap: Annotate struct prism2_download_data with __counted_by 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@...nel.org> Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org> Cc: linux-wireless@...r.kernel.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> --- 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); }; -- 2.34.1
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