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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id cp15-20020a170902e78f00b00176dc67df44sm3361025plb.132.2022.10.20.15.57.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Oct 2022 15:57:21 -0700 (PDT) Date: Thu, 20 Oct 2022 15:57:21 -0700 From: Kees Cook To: "Edgecombe, Rick P" Cc: "bsingharora@gmail.com" , "hpa@zytor.com" , "Syromiatnikov, Eugene" , "peterz@infradead.org" , "rdunlap@infradead.org" , "Yu, Yu-cheng" , "dave.hansen@linux.intel.com" , "kirill.shutemov@linux.intel.com" , "Eranian, Stephane" , "linux-mm@kvack.org" , "fweimer@redhat.com" , "nadav.amit@gmail.com" , "jannh@google.com" , "dethoma@microsoft.com" , "linux-arch@vger.kernel.org" , "kcc@google.com" , "bp@alien8.de" , "oleg@redhat.com" , "hjl.tools@gmail.com" , "Yang, Weijiang" , "Lutomirski, Andy" , "pavel@ucw.cz" , "arnd@arndb.de" , "Moreira, Joao" , "tglx@linutronix.de" , "mike.kravetz@oracle.com" , "x86@kernel.org" , "linux-doc@vger.kernel.org" , "jamorris@linux.microsoft.com" , "john.allen@amd.com" , "rppt@kernel.org" , "mingo@redhat.com" , "Shankar, Ravi V" , "corbet@lwn.net" , "linux-kernel@vger.kernel.org" , "linux-api@vger.kernel.org" , "gorcunov@gmail.com" Subject: Re: [PATCH v2 27/39] x86/cet/shstk: Handle signals for shadow stack Message-ID: <202210201556.EF52D322@keescook> References: <20220929222936.14584-1-rick.p.edgecombe@intel.com> <20220929222936.14584-28-rick.p.edgecombe@intel.com> <202210031347.6DBE61199@keescook> <56095eac64e95b79ea04e84909d8ba0ab49d9246.camel@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <56095eac64e95b79ea04e84909d8ba0ab49d9246.camel@intel.com> ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=UxXF8cbs; dmarc=pass (policy=none) header.from=chromium.org; spf=pass (imf22.hostedemail.com: domain of keescook@chromium.org designates 209.85.214.174 as permitted sender) smtp.mailfrom=keescook@chromium.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666306643; a=rsa-sha256; cv=none; b=I9EvgP0qaYO4aaZZ2jEESzGq+VpB07d4iSEyxkY8LNDgFhs52ITTmY0HqIUc0b/3/wwo5N M9B19ylPiw0EbCy8bwamW0krUc5UVxFolx3zLqPUafeTCWnjKDyD+tXlrUaV+elT3gigv0 51Eaeysuau2ibGlZvo3fOOa0xRTjjjE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1666306643; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=TMshH9biaVXQs7+fRI1qPbg8/Vmgf41zzdE8Ax9DFYA=; b=Pp0EKjhRNM+io2LuBJIvQpnwpM/lowvfKI+6rfJh+kCys51+9RvWA9Hz9JSkMajc0zPn4z DZN8LMZfznHsZJSfv0IzdDm+kA6uWGqr92UYZ5sYakKAse3EfgD/hcQ8ImfAQ7WdWoGr4X LbIi+ZZrS7rGb5xynaQDW2b+9xayQ0o= Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=UxXF8cbs; dmarc=pass (policy=none) header.from=chromium.org; spf=pass (imf22.hostedemail.com: domain of keescook@chromium.org designates 209.85.214.174 as permitted sender) smtp.mailfrom=keescook@chromium.org X-Rspam-User: X-Rspamd-Server: rspam06 X-Stat-Signature: 4mdytz15zd7h5d1jsoeonojbd8ny6h6g X-Rspamd-Queue-Id: 8DC3AC0009 X-HE-Tag: 1666306643-877015 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, Oct 20, 2022 at 10:08:17PM +0000, Edgecombe, Rick P wrote: > Kees, sorry for the delayed response. There was so much feedback, I > missed responding to some. No worries! Most of my feedback was just to get help filling gaps in my understanding. :) I appreciate the replies -- I'm looking forward to v3! -- Kees Cook