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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id j12-20020a170902c3cc00b001b9e9edbf43sm3884947plj.171.2023.09.15.13.05.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Sep 2023 13:05:54 -0700 (PDT) From: Kees Cook To: Arend van Spriel Cc: Kees Cook , Franky Lin , Hante Meuleman , Kalle Valo , Matthias Brugger , Hector Martin , =?utf-8?q?Alvin_=C5=A0ipraga?= , Hans de Goede , linux-wireless@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, SHA-cyfmac-dev-list@infineon.com, Nathan Chancellor , Nick Desaulniers , Tom Rix , "Russell King (Oracle)" , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH] wifi: brcmfmac: firmware: Annotate struct brcmf_fw_request with __counted_by Date: Fri, 15 Sep 2023 13:05:52 -0700 Message-Id: <20230915200552.never.642-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1682; i=keescook@chromium.org; h=from:subject:message-id; bh=weqFhcMmCNEK0MsxB/YQXMpH/1sEF3VWxqr/sIkwvFs=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlBLkgJxO209fAiikOP4NOLZvvkl0taCniJgeTe BfOIErtc2+JAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZQS5IAAKCRCJcvTf3G3A JuUUEACZ2zaEA8T4Cn+MXQTZsiQW6ccYb+T67EABtpHMJ4cpCBYnDUFObSJdhqyNgTMRDPYL07d 6fCfLAJQEBKhzzlKriudyRK7RKpMLFXL1/VZ2VshpPpr1+nih8BvG6G95958M/2KzzNfBnJW1K2 r8ll18pOYxr53JHtE0afMIbVijjDcCmJ1YBnSdSWF4F0qdJSLYxI7tWXmOcanyNTMgVktHRikWK lvUS2q72eqNEAM8NTOBfg8watlPpbDk7Dvooq+jYCZe5qCV7FFQOohK4NFaje1Y/AbRCAYw6ItN saFM0iOJNyUWDpt0hsG710nZFYvpoGsFkhHBbzqFoySbVFfqhQD5ubDa48yoN0AD0hWntF5IJrk VUiGrKP8rXAHmTO0gqMAKbjlDJr2pZez8QZtkVa2K7hgHpabCN7d60rbWvAyjMaba+QZaMY1oBB 7tHL/Avo/6NdspsNpPVeiFpRU3mDEhjiB6i7fJqblMFndNBs5gywqAYyLtbmMqGKijzhbW3qC+j JYb4HUVvToJO7FD3EzJMQQjuNcxjoc5CmlwNJxMYW1gfIwr/Fv/vSnFOMzB9R0yV8fh2xUHjGeD sEHOO1E+G+Le0NLFJBX6tKqb451jPjxpTyT3+IpcOopCKnL60hv8UlEjI2U93m+xzsWhbrL2F94 WI39utA MSfdKWew== 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 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 brcmf_fw_request. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Arend van Spriel Cc: Franky Lin Cc: Hante Meuleman Cc: Kalle Valo Cc: Matthias Brugger Cc: Hector Martin Cc: "Alvin Šipraga" Cc: Hans de Goede Cc: linux-wireless@vger.kernel.org Cc: brcm80211-dev-list.pdl@broadcom.com Cc: SHA-cyfmac-dev-list@infineon.com Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Matthias Brugger --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h index 1266cbaee072..4002d326fd21 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h @@ -69,7 +69,7 @@ struct brcmf_fw_request { u16 bus_nr; u32 n_items; const char *board_types[BRCMF_FW_MAX_BOARD_TYPES]; - struct brcmf_fw_item items[]; + struct brcmf_fw_item items[] __counted_by(n_items); }; struct brcmf_fw_name {