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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id z8sm3049258pgr.70.2020.09.25.13.37.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Sep 2020 13:37:08 -0700 (PDT) Date: Fri, 25 Sep 2020 13:37:07 -0700 From: Kees Cook To: Andy Lutomirski Subject: Re: [PATCH v2 seccomp 3/6] seccomp/cache: Add "emulator" to check if filter is arg-dependent Message-ID: <202009251332.24CE0C58@keescook> References: <202009251223.8E46C831E2@keescook> <2FA23A2E-16B0-4E08-96D5-6D6FE45BBCF6@amacapital.net> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <2FA23A2E-16B0-4E08-96D5-6D6FE45BBCF6@amacapital.net> Cc: Andrea Arcangeli , Giuseppe Scrivano , Valentin Rothberg , Jann Horn , YiFei Zhu , Linux Containers , Tobin Feldman-Fitzthum , kernel list , Hubertus Franke , Jack Chen , Dimitrios Skarlatos , Josep Torrellas , Will Drewry , bpf , Tianyin Xu X-BeenThere: containers@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux Containers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: containers-bounces@lists.linux-foundation.org Sender: "Containers" T24gRnJpLCBTZXAgMjUsIDIwMjAgYXQgMTI6NTE6MjBQTSAtMDcwMCwgQW5keSBMdXRvbWlyc2tp IHdyb3RlOgo+IAo+IAo+ID4gT24gU2VwIDI1LCAyMDIwLCBhdCAxMjo0MiBQTSwgS2VlcyBDb29r IDxrZWVzY29va0BjaHJvbWl1bS5vcmc+IHdyb3RlOgo+ID4gCj4gPiDvu79PbiBGcmksIFNlcCAy NSwgMjAyMCBhdCAxMTo0NTowNUFNIC0wNTAwLCBZaUZlaSBaaHUgd3JvdGU6Cj4gPj4gT24gVGh1 LCBTZXAgMjQsIDIwMjAgYXQgMTA6MDQgUE0gWWlGZWkgWmh1IDx6aHV5aWZlaTE5OTlAZ21haWwu Y29tPiB3cm90ZToKPiA+Pj4+IFdoeSBkbyB0aGUgcHJlcGFyZSBoZXJlIGluc3RlYWQgb2YgZHVy aW5nIGF0dGFjaD8gKEFuZCBub3RlIHRoYXQgaXQKPiA+Pj4+IHNob3VsZCBub3QgYmUgd3JpdHRl biB0byBmYWlsLikKPiA+Pj4gCj4gPj4+IFJpZ2h0Lgo+ID4+IAo+ID4+IER1cmluZyBhdHRhY2gg YSBzcGlubG9jayAoY3VycmVudC0+c2lnaGFuZC0+c2lnbG9jaykgaXMgaGVsZC4gRG8gd2UKPiA+ PiByZWFsbHkgd2FudCB0byBwdXQgdGhlIGVtdWxhdG9yIGluIHRoZSAiYXRvbWljIHNlY3Rpb24i Pwo+ID4gCj4gPiBJdCdzIGEgZ29vZCBwb2ludCwgYnV0IEkgaGFkIHNvbWUgb3RoZXIgaWRlYXMg YXJvdW5kIGl0IHRoYXQgbGVhZCB0byBtZQo+ID4gYSBkaWZmZXJlbnQgY29uY2x1c2lvbi4gSGVy ZSdzIHdoYXQgSSd2ZSBnb3QgaW4gbXkgaGVhZDoKPiA+IAo+ID4gSSBkb24ndCB2aWV3IGZpbHRl ciBhdHRhY2ggKG5vciB0aGUgc2lnbG9jaykgYXMgZmFzdHBhdGg6IHRoZSBsb2NrIGlzCj4gPiBy YXJlbHkgY29udGVzdGVkIGFuZCB0aGUgImxvbmcgdGltZSIgd2lsbCBvbmx5IGJlIGR1cmluZyBm aWx0ZXIgYXR0YWNoLgo+ID4gCj4gPiBXaGVuIHBlcmZvcm1pbmcgZmlsdGVyIGVtdWxhdGlvbiwg YWxsIHRoZSBzeXNjYWxscyB0aGF0IGFyZSBhbHJlYWR5Cj4gPiBtYXJrZWQgYXMgIm11c3QgcnVu IGZpbHRlciIgb24gdGhlIHByZXZpb3VzIGZpbHRlciBjYW4gYmUgc2tpcHBlZCBmb3IKPiA+IHRo ZSBuZXcgZmlsdGVyLCBzaW5jZSBpdCBjYW5ub3QgY2hhbmdlIHRoZSBvdXRjb21lLCB3aGljaCBt YWtlcyB0aGUKPiA+IGVtdWxhdGlvbiBzdGVwIGZhc3Rlci4KPiA+IAo+ID4gVGhlIHByZXZpb3Vz IGZpbHRlcidzIGJpdG1hcCBpc24ndCAic3RhYmxlIiB1bnRpbCBzaWdsb2NrIGlzIGhlbGQuCj4g PiAKPiA+IElmIHdlIGRvIHRoZSBlbXVsYXRpb24gc3RlcCBiZWZvcmUgc2lnbG9jaywgd2UgaGF2 ZSB0byBhbHdheXMgZG8gZnVsbAo+ID4gZXZhbHVhdGlvbiBvZiBhbGwgc3lzY2FsbHMsIGFuZCB0 aGVuIG1lcmdlIHRoZSBiaXRtYXAgZHVyaW5nIGF0dGFjaC4KPiA+IFRoYXQgbWVhbnMgYWxsIGZp bHRlcnMgZXZlciBhdHRhY2hlZCB3aWxsIHRha2UgbWF4aW1hbCB0aW1lIHRvIHBlcmZvcm0KPiA+ IGVtdWxhdGlvbi4KPiA+IAo+ID4gSSBwcmVmZXIgdGhlIGlkZWEgb2YgdGhlIGVtdWxhdGlvbiBz dGVwIHRha2luZyBhZHZhbnRhZ2Ugb2YgdGhlIGJpdG1hcAo+ID4gb3B0aW1pemF0aW9uLCBzaW5j ZSB0aGUga2VybmVsIHNwZW5kcyBsZXNzIHRpbWUgZG9pbmcgd29yayBvdmVyIHRoZSBsaWZlCj4g PiBvZiB0aGUgcHJvY2VzcyB0cmVlLiBJdCdzIGNlcnRhaW5seSBtYXJnaW5hbCwgYnV0IGl0IGFs c28gbGV0cyBhbGwgdGhlCj4gPiBiaXRtYXAgbWFuaXB1bGF0aW9uIHN0YXkgaW4gb25lIHBsYWNl IChhcyBvcHBvc2VkIHRvIGJlaW5nIHNwbGl0IGJldHdlZW4KPiA+ICJwcmVwYXJlIiBhbmQgImF0 dGFjaCIpLgo+ID4gCj4gPiBXaGF0IGRvIHlvdSB0aGluaz8KPiA+IAo+ID4gCj4gCj4gSeKAmW0g d29uZGVyaW5nIGlmIHdlIHNob3VsZCBiZSBtdWNoIG11Y2ggbGF6aWVyLiBXZSBjb3VsZCBwb3Rl bnRpYWxseSB3YWl0IHVudGlsIHNvbWVvbmUgYWN0dWFsbHkgdHJpZXMgdG8gZG8gYSBnaXZlbiBz eXNjYWxsIGJlZm9yZSB3ZSB0cnkgdG8gZXZhbHVhdGUgd2hldGhlciB0aGUgcmVzdWx0IGlzIGZp eGVkLgoKVGhhdCBzZWVtcyBsaWtlIHdlJ2QgbmVlZCB0byB0cmFjayB5ZXQgYW5vdGhlciBiaXRt YXAgb2YgImRpZCB3ZSBlbXVsYXRlCnRoaXMgeWV0PyIgQW5kIGl0IG1lYW5zIHRoZSBmaWx0ZXIg aXNuJ3QgcmVhbGx5ICJkb25lIiB1bnRpbCB5b3UgcnVuCmFub3RoZXIgc3lzY2FsbD8gZWVoLCBJ J20gbm90IGEgZmFuOiBpdCBzY3JhdGNoZXMgYXQgbXkgZGVzaXJlIGZvcgpkZXRlcm1pbmlzbS4g OykgT3IgbWF5YmUgbXkgaW1wbGVtZW50YXRpb24gaW1hZ2luYXRpb24gaXMgbWlzc2luZwpzb21l dGhpbmc/CgotLSAKS2VlcyBDb29rCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fCkNvbnRhaW5lcnMgbWFpbGluZyBsaXN0CkNvbnRhaW5lcnNAbGlzdHMubGlu dXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxt YW4vbGlzdGluZm8vY29udGFpbmVycw==