From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoffer Dall Subject: Re: [PATCH] KVM: arm/arm64: Allow usercopy to vcpu->arch.ctxt and arm64 debug Date: Sun, 22 Oct 2017 09:44:18 +0200 Message-ID: <20171022074418.GA3805@cbox> References: <20171020232525.7387-1-pbonzini@redhat.com> <20171021184545.2497-1-christoffer.dall@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: KVM , "kernel-hardening@lists.openwall.com" , Marc Zyngier , Paolo Bonzini , kvmarm@lists.cs.columbia.edu, "linux-arm-kernel@lists.infradead.org" To: Kees Cook Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org T24gU2F0LCBPY3QgMjEsIDIwMTcgYXQgMDg6MDY6MTBQTSAtMDcwMCwgS2VlcyBDb29rIHdyb3Rl Ogo+IE9uIFNhdCwgT2N0IDIxLCAyMDE3IGF0IDExOjQ1IEFNLCBDaHJpc3RvZmZlciBEYWxsCj4g PGNocmlzdG9mZmVyLmRhbGxAbGluYXJvLm9yZz4gd3JvdGU6Cj4gPiBXZSBkbyBkaXJlY3QgdXNl cmFjY2VzcyBjb3B5aW5nIHRvIHRoZSBrdm1fY3B1X2NvbnRleHQgc3RydWN0dXJlCj4gPiBlbWJl ZGRlZCBpbiB0aGUga3ZtX3ZjcHVfYXJjaCBzdHJ1Y3R1cmUsIGFuZCB0byB0aGUgdmNwdSBkZWJ1 ZyByZWdpc3Rlcgo+ID4gc3RhdGUuICBFdmVyeXRoaW5nIGVsc2UgKHRpbWVyLCBQTVUsIHZnaWMp IGdvZXMgdGhyb3VnaCBhIHRlbXBvcmFyeQo+ID4gaW5kaXJlY3Rpb24uCj4gCj4gQXJlIHRoZXNl IGNvcGllcyBkb25lIHdpdGggYSBkeW5hbWljIHNpemU/IFRoZSBub3JtYWwgd2F5IHRoZXNlIGdl dAo+IHdoaXRlbGlzdGVkIGlzIHZpYSBidWlsdGluX2NvbnN0IHNpemVzIG9uIHRoZSBjb3B5LiBM b29raW5nIGF0Cj4gS1ZNX1JFR19TSVpFKCksIHRob3VnaCwgaXQgc2VlbXMgdGhhdCB3b3VsZCBi ZSBhIGR5bmFtaWMgY2FsY3VsYXRpb24uCj4gCgpJdCdzIHN1cGVyIGNvbmZ1c2luZywgYnV0IGl0 J3MgYWN0dWFsbHkgc3RhdGljLgoKV2UgY2FuIG9ubHkgZ2V0IHRvIHRoZWUgZnVuY3Rpb25zIHZp YSBrdm1fYXJtX3N5c19yZWdfZ2V0X3JlZygpIGFuZAprdm1fYXJtX3N5c19yZWdfc2V0X3JlZygp LCBhbmQgdGhleSBib3RoIGRvCgoJaWYgKEtWTV9SRUdfU0laRShyZWctPmlkKSAhPSBzaXplb2Yo X191NjQpKSIKCQlyZXR1cm4gLUVOT0VOVDsKClNvIHRoaXMgaXMgYWx3YXlzIGEgdTY0IGNvcHku ICBIb3dldmVyLCBJIHRoaW5rIGl0J3MgbXVjaCBjbGVhcmVyIGlmIEkKcmV3cml0ZSB0aGVzZSB0 byB1c2UgZ2V0X3VzZXIoKSBhbmQgcHV0X3VzZXIoKS4gIHYyIGluY29taW5nLgoKPiA+IEZpeGlu ZyBhbGwgYWNjZXNzZXMgdG8ga3ZtX2NwdV9jb250ZXh0IGlzIG1hc3NpdmVseSBpbnZhc2l2ZSwg YW5kIHdlJ2QKPiA+IGxpa2UgdG8gYXZvaWQgdGhhdCwgc28gd2UgdGVsbCBrdm1faW5pdF91c2Vy Y29weSB0byB3aGl0ZWxpc3QgYWNjZXNzZXMKPiA+IHRvIG91dCBjb250ZXh0IHN0cnVjdHVyZS4K PiA+Cj4gPiBUaGUgZGVidWcgc3lzdGVtIHJlZ2lzdGVyIGFjY2Vzc2VzIG9uIGFybTY0IGFyZSBt b2RpZmllZCB0byB3b3JrIHRocm91Z2gKPiA+IGFuIGluZGlyZWN0aW9uIGluc3RlYWQuCj4gPgo+ ID4gQ2M6IGtlcm5lbC1oYXJkZW5pbmdAbGlzdHMub3BlbndhbGwuY29tCj4gPiBDYzogS2VlcyBD b29rIDxrZWVzY29va0BjaHJvbWl1bS5vcmc+Cj4gPiBDYzogUGFvbG8gQm9uemluaSA8cGJvbnpp bmlAcmVkaGF0LmNvbT4KPiA+IENjOiBSYWRpbSBLcsSNbcOhxZkgPHJrcmNtYXJAcmVkaGF0LmNv bT4KPiA+IENjOiBNYXJjIFp5bmdpZXIgPG1hcmMuenluZ2llckBhcm0uY29tPgo+ID4gU2lnbmVk LW9mZi1ieTogQ2hyaXN0b2ZmZXIgRGFsbCA8Y2hyaXN0b2ZmZXIuZGFsbEBsaW5hcm8ub3JnPgo+ ID4gLS0tCj4gPiBUaGlzIGZpeGVzIEtWTS9BUk0gb24gdG9kYXkncyBsaW51eCBuZXh0IHdpdGgg Q09ORklHX0hBUkRFTkVEX1VTRVJDT1BZLgo+ID4KPiA+IFRoZSBwYXRjaCBpcyBiYXNlZCBvbiBs aW51eC1uZXh0IHBsdXMgUGFvbG8ncyB4ODYgcGF0Y2ggd2hpY2ggaW50cm9kdWNlcwo+ID4ga3Zt X2luaXRfdXNlcmNvcHkuICBOb3Qgc3VyZSBob3cgdGhpcyBuZWVkcyB0byBnZXQgbWVyZ2VkLCBi dXQgaXQgd291bGQKPiA+IHBvdGVudGlhbGx5IG1ha2Ugc2Vuc2UgZm9yIFBhb2xvIHRvIHB1dCB0 b2dldGhlciBhIHNldCBvZiB0aGUgcGF0Y2hlcwo+ID4gbmVlZGVkIGZvciB0aGlzLgo+IAo+IEkg d2FzIHBsYW5uaW5nIHRvIGNhcnJ5IFBhb2xvJ3MgcGF0Y2hlcywgYW5kIEkgY2FuIHRha2UgdGhp cyBvbmUgdG9vLgoKU291bmRzIGdvb2QgdG8gbWUuCgo+IElmIHRoaXMgcG9zZXMgYSBwcm9ibGVt LCB0aGVuIEkgY291bGQganVzdCBkbyBhIHR3by1waGFzZSBjb21taXQgb2YKPiB0aGUgd2hpdGVs aXN0aW5nIGNvZGUsIGxlYXZpbmcgdGhlIHZlcnkgbGFzdCBjb21taXQgKHdoaWNoIGVuYWJsZXMg dGhlCj4gZGVmZW5zZSBmb3IgYW55dGhpbmcgbm90IHlldCB3aGl0ZWxpc3RlZCksIHVudGlsIHRo ZSBLVk0gdHJlZXMgbGFuZC4KPiAKPiBXaGF0J3MgcHJlZmVycmVkPwoKQXNzdW1pbmcgdGhlcmUn cyBhbiBhY2sgZnJvbSBNYXJjIFp5bmdpZXIgb24gdjIgb2YgdGhpcyBwYXRjaCwgSSBwcmVmZXIK eW91IGp1c3QgdGFrZSB0aGVtIGFzIHBhcnQgb2YgeW91ciBzZXJpZXMuCgo+IAo+IFRoYW5rcyBm b3IgbG9va2luZyBhdCB0aGlzIQo+IApObyBwcm9ibGVtLAotQ2hyaXN0b2ZmZXIKX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18Ka3ZtYXJtIG1haWxpbmcgbGlz dAprdm1hcm1AbGlzdHMuY3MuY29sdW1iaWEuZWR1Cmh0dHBzOi8vbGlzdHMuY3MuY29sdW1iaWEu ZWR1L21haWxtYW4vbGlzdGluZm8va3ZtYXJtCg==