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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id 27-20020a17090a031b00b00276cb0757acsm5517150pje.9.2023.09.22.10.50.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Sep 2023 10:50:54 -0700 (PDT) From: Kees Cook To: Tim Harvey Cc: Kees Cook , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH] hwmon: Annotate struct gsc_hwmon_platform_data with __counted_by Date: Fri, 22 Sep 2023 10:50:53 -0700 Message-Id: <20230922175053.work.564-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1180; i=keescook@chromium.org; h=from:subject:message-id; bh=G/sQxhthzDNR478m1f95ahGHMSWbJk7rtQteBk8HET4=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlDdP99vYndLA1caErqy08IrpneOVTAPCIniCNg BvHKfdj/5OJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZQ3T/QAKCRCJcvTf3G3A JuITD/4gvcnPy1qfs5STWxhVJ+FtPRDmPzReDK28rjD27nbQYabkIqPz8oHGhp4Uq+Em/8Uaga2 6QdV0pGz09BFM+dBMRfVY2GDjltT8BFvt1ei5ZYlA2CSgAyylqI83+lh/olv1i+rM2c1kfiXd5x FcrR50fp8UkdwXh0nh45LymHAuYpENyHpmp5LS47fPdvwqq9JY572yadSOY4c2c/3QwcQfXZ0Yj 0pag31BotHRSZiqjK+RXthuNUHwpWJIHHQYfCHI0NPB+i5e34fWN/qjhSRunm4d9RhDOZEmi92m 0bqmvv9JJyo0eAxP5qSQSxybH15zvBM0usFgbPE86XTqUvZD/afK1opfMlR7B3kMJi0FsGXc43W i8Ao0zdZqG9CZf95+DJmCGFk5dBV/GQLZaLYVskmDkOnGkPoF5iagST4CKnD/EXcTwHp+pQ6qBw dHLgnGElgl4GxhFNb6c3DvKKYT1T/x9HNYSUH3HGTlcibFmEqlQdRzQCFQu40W0+JxXAKG/JdfR qkZXrz16Hqj5DKqAo/275AXLMir65QX+EvECu+z+wVP9lSdKSm+LfR/g0f66ayABl6Vj70Q2rxp RjAYE8WmixBqqFTgeEBXDx1S6b7UFYmkT2DxX8jJKY714DKb08H2ZtuEoNB4/XgRB1Tr5tvkkLX RzpO2/z 00+UBXBA== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on morse.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (morse.vger.email [0.0.0.0]); Fri, 22 Sep 2023 10:52:21 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777796441972603709 X-GMAIL-MSGID: 1777796441972603709 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 gsc_hwmon_platform_data. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Tim Harvey Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva --- include/linux/platform_data/gsc_hwmon.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/platform_data/gsc_hwmon.h b/include/linux/platform_data/gsc_hwmon.h index f2781aa7eff8..70e8a6bec0f6 100644 --- a/include/linux/platform_data/gsc_hwmon.h +++ b/include/linux/platform_data/gsc_hwmon.h @@ -40,6 +40,6 @@ struct gsc_hwmon_platform_data { unsigned int resolution; unsigned int vreference; unsigned int fan_base; - struct gsc_hwmon_channel channels[]; + struct gsc_hwmon_channel channels[] __counted_by(nchannels); }; #endif