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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id c9-20020aa78809000000b0068a13b0b300sm1951757pfo.11.2023.10.06.13.17.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Oct 2023 13:17:17 -0700 (PDT) From: Kees Cook To: Ping-Ke Shih Cc: Kees Cook , Kalle Valo , "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: rtw89: coex: Annotate struct rtw89_btc_btf_set_slot_table with __counted_by Date: Fri, 6 Oct 2023 13:17:15 -0700 Message-Id: <20231006201715.work.239-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1321; i=keescook@chromium.org; h=from:subject:message-id; bh=eu6W7wXw5RTTiD60SAAgUrQDRZxpZuc1EvwMJ2JgTAI=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlIGtLFrvUk7TV+fsu3RoZBXUeAY5BE45UBpI5o H04FXBoP4qJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZSBrSwAKCRCJcvTf3G3A JkN9D/9DbkQ9s24VTWKihPeasIWSlCASR9Q6UgMN2sh4QmgFMoBiZlxb12IObvOXPnLVlYdHbmX EVy9OcIWuPk43HGC3iU/j44eEHlpM/TqUYFwvguvhr8W3ZvbTF8lzfpmCs0SmJXhbFMBaZ5+mB2 2qIy4G6fMNcmwLK4jH/1l5P8/Ls4R6xkfMqkDb4ibaFLM+VlsWnSEQYN7HIWR5ZiT8vPIHPAymc 6mi+AVnfzirQ380CiVqi7z4Llsn8ZXvpBa7RbJc+XMfQlLESPt2LTk6gskIP+d/mAzribY7z7xF UJr/yeImzGyEY+MrWTNG64p3AhBR3uTee3rMN+6QU/hQu8A9ng7ddLD+J/uVZYdOdMXqpHIQD0T sKVockWMg/GUEvNzpsNb6ebVslSZXGRRCN7NKF8y7T3jNQKzxDO0dppZdThl+D9gjUNeILx4rqs UWb00OkZQK2gTdUSzsm3Qy9fwl0/nCa7nwaIT86096mOrdJx+kkV23p4fujH9DXzzzuKJIrZ63h 2aXKuHw1/zaTlGRFHj0yAW1UVA487R9UVz+H/dDgCooswodM7cvImtDGZvKogqwPG2ICG7pepP2 V75uq6CUWbyaJRKJxrdFTlZLJtnlcmkqDtyNWUN7zOI8kEGoDOLH5Ab4a73LxseCO2tTiBtgstk FLmAlOo dZguPuXA== 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 rtw89_btc_btf_set_slot_table. Cc: Ping-Ke Shih 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/realtek/rtw89/coex.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtw89/coex.c b/drivers/net/wireless/realtek/rtw89/coex.c index 4ba8b3df70ae..d66a1152c3f5 100644 --- a/drivers/net/wireless/realtek/rtw89/coex.c +++ b/drivers/net/wireless/realtek/rtw89/coex.c @@ -237,7 +237,7 @@ struct rtw89_btc_btf_set_report { struct rtw89_btc_btf_set_slot_table { u8 fver; u8 tbl_num; - u8 buf[]; + u8 buf[] __counted_by(tbl_num); } __packed; struct rtw89_btc_btf_set_mon_reg {