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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id 3-20020a621503000000b00581c741f95csm24490646pfv.46.2023.01.20.11.19.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Jan 2023 11:19:50 -0800 (PST) Date: Fri, 20 Jan 2023 11:19:36 -0800 From: Kees Cook To: "Edgecombe, Rick P" Cc: "akpm@linux-foundation.org" , "bsingharora@gmail.com" , "hpa@zytor.com" , "Syromiatnikov, Eugene" , "peterz@infradead.org" , "rdunlap@infradead.org" , "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" , "kcc@google.com" , "linux-arch@vger.kernel.org" , "bp@alien8.de" , "oleg@redhat.com" , "hjl.tools@gmail.com" , "pavel@ucw.cz" , "Lutomirski, Andy" , "linux-doc@vger.kernel.org" , "arnd@arndb.de" , "tglx@linutronix.de" , "Schimpe, Christina" , "mike.kravetz@oracle.com" , "x86@kernel.org" , "Yang, Weijiang" , "jamorris@linux.microsoft.com" , "john.allen@amd.com" , "rppt@kernel.org" , "andrew.cooper3@citrix.com" , "mingo@redhat.com" , "corbet@lwn.net" , "linux-kernel@vger.kernel.org" , "linux-api@vger.kernel.org" , "gorcunov@gmail.com" Subject: Re: [PATCH v5 00/39] Shadow stacks for userspace Message-ID: <202301201118.6A55DE336@keescook> References: <20230119212317.8324-1-rick.p.edgecombe@intel.com> <20230119142602.97b24f3cdba75f20f97786d3@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Queue-Id: 946561C0013 X-Rspamd-Server: rspam01 X-Stat-Signature: os6mefxkxpk3jbtdiozdxmtf5a443arm X-HE-Tag: 1674242418-206116 X-HE-Meta: U2FsdGVkX19TJIB2THOOi+AOXlYVXU64c63N28qno0zTykUFLxYT98EUODfBozXvaQBI8xE2HEEbdWLIeC1+MDE1yPBJ5Ai+JVCY7EN/2KMlIlyNBA/Jj69rn8sxtKBHUUJG3HoDZ6dDbh6tnrTK96dqZUGR6yshy99zqLooPubc6B0mGixVb21ec1I+Ar/EC3BnOugNpIqmi8YIwE4ccHfphgLcNAUdDUlYFSxzJE+TO4DRpcF+ZIS6/t3KMikDrpfS2gBVR26v0+BfgeFzXrPxAoNgXXrwW59hdXsQhu2GtIf7tzvfivbrrAyFUVHeUiRqkYeLJU8OIfYBQWY/uC3Jyu8aOejLbdfGM/0kLkBq9mamkcDpQANXo2AnFOM8tBko9QcwcZ2IVJGOR5fKXKH5hxjrr2F5hVVcIqvPlxTjPub+PZTMjVwUQuP4MIsZjmA958wLhwuNxgD9ov4jxcWGJAqIWLS/N9tmrb4sfYzZCruGhhQAdKSgF/HBxUHSjCifhaAHoT8XCsIEuT1XPxRiUbqxDqnEG/KOKA6iU2SscdIbWqCDFxgjk80L1bV99DHtpk8Gy0KIfdi96Wri04RS/y/kho4dT5vcByzPENNr+Z6Tu+fa9oFrOKxrcYDVbZxtmObGHz4u9sro0qUo9cZpeWKi5wixrNKFAoIi0fCFm/ZoA6/Ax8crDGAOSuJuC8ReqSCqUPgaBv6gL+4kai83pkqzcLbpvUDffqWzoCXd6hB3bnJtOAb+m+1THvf0iV1aonhcAL/3Vk3RuFH+UCB+19GIly6oPqlO9p8XuHTuaVG9MJIrQ7lVNcoWx3etFPZNWT8dFX1bLe58HZ1lDnGoI+ss1hs4mBDSuWFsl6kjSgFPFSIBkE23qRV2qaBlblb6eZmA4lwVNPp+rcLzfqNwbk/R82Jsw1ci8T22mbvOVaXXD9s6O4c7uxn/t3o6tDYC1SG6+/J1iXIs2kk 8YESJFA8 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 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 Fri, Jan 20, 2023 at 05:27:30PM +0000, Edgecombe, Rick P wrote: > On Thu, 2023-01-19 at 14:26 -0800, Andrew Morton wrote: > > On Thu, 19 Jan 2023 13:22:38 -0800 Rick Edgecombe < > > rick.p.edgecombe@intel.com> wrote: > > > > > SHSTK > > > > Sounds like me trying to swear in Russian while drunk. > > > > Is there any chance of s/shstk/shadow_stack/g? > > I'm fine with the name change. I think shstk got debated and picked > early in the history of the series before I got involved. "shstk" is > nice and short, but it's not completely clear what it is unless you > already know about shadow stack. So there is a tradeoff of clarity and > line length/wrapping. Does anyone else have any strong opinions? I prefer SHSTK because it specifically means x86's hardware shadow stack from CET. Lots of things can (and have) implemented things called "shadow stack". -- Kees Cook