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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id a12-20020a170902ee8c00b001acae9734c0sm4331895pld.266.2023.10.06.13.19.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Oct 2023 13:19:03 -0700 (PDT) From: Kees Cook To: Kalle Valo Cc: Kees Cook , "Gustavo A. R. Silva" , linux-wireless@vger.kernel.org, linux-hardening@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH] wifi: intersil: hostap: Annotate struct prism2_download_data with __counted_by Date: Fri, 6 Oct 2023 13:19:02 -0700 Message-Id: <20231006201901.work.278-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1293; i=keescook@chromium.org; h=from:subject:message-id; bh=TKH2rwBEryE3wL9UTdezXy/1pyU6gGSThNovHiWR+yA=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlIGu2xaMzE8hOMdtfFrRZu2+Af9UD+Je6xgVdx MTm5JiaiHGJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZSBrtgAKCRCJcvTf3G3A Ju49EACitXCernnFJ9biGqz8FuXcSt+CYk4lCp82ncDmztIE7w8s7PrVYr3qyIXD5St+yemEvIY 8+TFJqHuSJ+paWaoNHAhsxTg1r09JWvOimJUZ3ElMl6n/Bd8/pxwY1ZHbmnlgOkLvs8+kXiYhfN /6++V7c10DTQExTdfUBlANEEoIZ8mQdJEHPv6sbSbxYOFYQeKo4XW3BxYi9WU4g1JcCmoRSNQB3 /k0E9TD8cAbbKU8FvNLEMCG9ME9FlhoA9yskpT6t7sTt4eBqzc1XNpXHTEnqwn9kHsRmi2WaUui vCgEF5gre80jNXK/sNllBjTiVbWYgBw3dyX1ghrHZMJmec97kDFi+IDdwdp9X68JKFcIqwEdM0i eJROy9QnWw9Rqo9gH+mfkop6wvtjTIlAfOTHlRzMvS+rIXhZAdMu/q88krRTEI4Q39mFJnxOuCE gOHoMiSxFoo+Lk8jQ4psIWfiq616RjfdOkBeWatRJ1SXz5clGVKm/GIjrmAUNUfQQ03Tnnj08W3 YQzgJWjH7EcBu0Yi0xiAELx8XW4MBy1Dn+rlcWlyOXyMd0J0W3M0iPxQD0ttRrhHVa/pILy9THj ACXphBwkKUpFySPa87ZUKJkkZETjbhD+ROuipwdrpc9vCOeiP22iA6esHKK6LteyO+UPePjIBJE ouK1x0v ulZR6wig== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org 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 Cc: "Gustavo A. R. Silva" 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 Reviewed-by: Gustavo A. R. Silva --- 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); };