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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id z16-20020a656650000000b00565dd935938sm2758499pgv.85.2023.09.15.13.12.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Sep 2023 13:12:55 -0700 (PDT) From: Kees Cook To: Miquel Raynal Cc: Kees Cook , Richard Weinberger , Vignesh Raghavendra , linux-mtd@lists.infradead.org, linux-renesas-soc@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH] mtd: rawnand: renesas: Annotate struct rnand_chip with __counted_by Date: Fri, 15 Sep 2023 13:12:54 -0700 Message-Id: <20230915201254.never.511-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1331; i=keescook@chromium.org; h=from:subject:message-id; bh=0FPGmCgvWt7RjvkdTmKw5gfdGmdouZ3tE6ulzomUB2U=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlBLrGeRmtf7v7PuHT27LUye5Sm4GLfRpWtonSx p2dIfmBTvuJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZQS6xgAKCRCJcvTf3G3A Jm5IEAC1QGXYJ9yOV0x64S8RCZrHbM5hI5qcR13CwhzHoqjMh2ZYHbyfI3r1NJdJai/+Lz6k2Qy mEzqHCjkI/Mub7jmWbQpzrff0loovqVfED8gwE3LDnt21UZALC2CHMhkeynTeqfx3blquFl/4/S 2xcPtvU8OQdr4PA1CDlZv4sIuMDjCztn2Z379LJlimR60iSZgkxcdJGE81pVkF5tD8CRvh5ckn/ JnHJ6MpjFjETsFnCbayrzEsvZTQXAA065p7EpTafPz7trWTN7hjj9nKUDG6aT8lnlALZDWgWf4v BWN3h57Y4cSYBG8z29PniByDsPlVzYfW3J9Lxd1C8430W9VDbH3xu/q957gWp4Bl5U7aQK8QsIJ dAf3OzpoL/ONx8PDuObWUgww//y8mHbjqvRqowuTA+VlchilOGBE0+qz4C6cxLvbBjTSm/XOW4W Q1R+0c+bJtRPYdANjaXw2lFzNTlXg+iHDbwsQsN/6BeNu06htsCNR+N9BpRebycxfmHrIqO86hb oluyC6avf43e1QhfZDl7ViR+6olmcuXajW1hbv4PdUXKzeEqvPZwfbcZzp4kFfYDCyMAV9oifxd yG29Z874XY7Xo5PDqIiflaj4hU2414puFaXtfq8yfQFSglCTM0E+X5RDD2qWfvNo2QdF212WR4F x/g2isV w/p8A3kA== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 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 rnand_chip. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Miquel Raynal Cc: Richard Weinberger Cc: Vignesh Raghavendra Cc: linux-mtd@lists.infradead.org Cc: linux-renesas-soc@vger.kernel.org Signed-off-by: Kees Cook --- drivers/mtd/nand/raw/renesas-nand-controller.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/renesas-nand-controller.c b/drivers/mtd/nand/raw/renesas-nand-controller.c index 589021ea9eb2..c9a01feff8df 100644 --- a/drivers/mtd/nand/raw/renesas-nand-controller.c +++ b/drivers/mtd/nand/raw/renesas-nand-controller.c @@ -210,7 +210,7 @@ struct rnand_chip { u32 tim_gen_seq1; u32 tim_gen_seq2; u32 tim_gen_seq3; - struct rnand_chip_sel sels[]; + struct rnand_chip_sel sels[] __counted_by(nsels); }; struct rnandc { -- 2.34.1