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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id c17-20020aa78c11000000b0068c10187dc3sm1896078pfd.168.2023.10.06.13.29.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Oct 2023 13:29:10 -0700 (PDT) From: Kees Cook To: Mauro Carvalho Chehab , Kees Cook Cc: Hans Verkuil , lijian , linux-media@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: Re: [PATCH] media: v4l2-event: Annotate struct v4l2_subscribed_event with __counted_by Date: Fri, 6 Oct 2023 13:28:40 -0700 Message-Id: <169662411867.2154917.2192633783167073007.b4-ty@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230922174951.work.160-kees@kernel.org> References: <20230922174951.work.160-kees@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=2.7 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_SBL_CSS,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.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 (lipwig.vger.email [0.0.0.0]); Fri, 06 Oct 2023 13:29:29 -0700 (PDT) X-Spam-Level: ** On Fri, 22 Sep 2023 10:49:52 -0700, Kees Cook wrote: > 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 v4l2_subscribed_event. > Additionally, since the element count member must be set before accessing > the annotated flexible array member, move its initialization earlier. > > [...] Since this is a trivial change and it's been 2 week without further discussion, I'll snag this patch. Applied to for-next/hardening, thanks! [1/1] media: v4l2-event: Annotate struct v4l2_subscribed_event with __counted_by https://git.kernel.org/kees/c/b1a20bbd4687 Take care, -- Kees Cook