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[209.85.208.42]) by smtp.gmail.com with ESMTPSA id w24-20020aa7cb58000000b0051e0f8aac74sm8959877edt.8.2023.07.16.13.40.14 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 16 Jul 2023 13:40:14 -0700 (PDT) Received: by mail-ed1-f42.google.com with SMTP id 4fb4d7f45d1cf-51de9c2bc77so5003402a12.3 for ; Sun, 16 Jul 2023 13:40:14 -0700 (PDT) X-Received: by 2002:a50:ee97:0:b0:518:7a40:b75e with SMTP id f23-20020a50ee97000000b005187a40b75emr11562286edr.25.1689540013798; Sun, 16 Jul 2023 13:40:13 -0700 (PDT) MIME-Version: 1.0 References: <20230716184204.GFZLQ5/DJ1+q8vpuuN@fat_crate.local> In-Reply-To: <20230716184204.GFZLQ5/DJ1+q8vpuuN@fat_crate.local> From: Linus Torvalds Date: Sun, 16 Jul 2023 13:39:56 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [GIT PULL] objtool/urgent for v6.5-rc2 To: Borislav Petkov Cc: x86-ml , lkml Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 16 Jul 2023 at 11:42, Borislav Petkov wrote: > > - Mark copy_iovec_from_user() __noclone in order to prevent gcc from > doing an inter-procedural optimization and confuse objtool This is painful. Isn't there some way to mark the user_access_begin() itself so that the compiler doesn't move it? I've pulled this thing, but it does seem like we're chasing the symptoms, not the deeper cause.. Linus