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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id x186sm6325466pfc.65.2021.04.01.14.46.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Apr 2021 14:46:23 -0700 (PDT) Date: Thu, 1 Apr 2021 14:46:23 -0700 From: Kees Cook To: Roy Yang Cc: akpm@linux-foundation.org, alex.popov@linux.com, ard.biesheuvel@linaro.org, catalin.marinas@arm.com, corbet@lwn.net, david@redhat.com, elena.reshetova@intel.com, glider@google.com, jannh@google.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, luto@kernel.org, mark.rutland@arm.com, peterz@infradead.org, rdunlap@infradead.org, rppt@linux.ibm.com, tglx@linutronix.de, vbabka@suse.cz, will@kernel.org, x86@kernel.org Subject: Re: [PATCH v8 0/6] Optionally randomize kernel stack offset each syscall Message-ID: <202104011442.B20F2BAFC@keescook> References: <20210330205750.428816-1-keescook@chromium.org> <20210401191744.1685896-1-royyang@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210401191744.1685896-1-royyang@google.com> X-Rspamd-Queue-Id: 4516320001D6 X-Stat-Signature: 6qox7ocfgmoeaiyoiye4tu5e9coewdt4 X-Rspamd-Server: rspam02 Received-SPF: none (chromium.org>: No applicable sender policy available) receiver=imf28; identity=mailfrom; envelope-from=""; helo=mail-pg1-f178.google.com; client-ip=209.85.215.178 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1617313585-135072 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Apr 01, 2021 at 12:17:44PM -0700, Roy Yang wrote: > Both Android and Chrome OS really want this feature; For Container-Optimized OS, we have customers > interested in the defense too. It's pretty close! There are a couple recent comments that need to be addressed, but hopefully it can land if x86 and arm64 maintainers are happy v10. > Change-Id: I1eb1b726007aa8f9c374b934cc1c690fb4924aa3 > -- > 2.31.0.208.g409f899ff0-goog And to let other folks know, I'm guessing this email got sent with git send-email to try to get a valid In-Reply-To header, but I guess git trashed the Subject and ran hooks to generate a Change-Id UUID. I assume it's from following the "Reply instructions" at the bottom of: https://lore.kernel.org/lkml/20210330205750.428816-1-keescook@chromium.org/ (It seems those need clarification about Subject handling.) -- Kees Cook