From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH] x86/traps: Fix cascade crash in show_registers() Date: Thu, 26 Jul 2018 03:51:22 -0600 Message-ID: <5B59999A02000078001D81E0@prv1-mh.provo.novell.com> References: <1532546157-5974-1-git-send-email-andrew.cooper3@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1532546157-5974-1-git-send-email-andrew.cooper3@citrix.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Andrew Cooper Cc: Xen-devel List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDI1LjA3LjE4IGF0IDIxOjE1LCA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3Jv dGU6Cj4gQ29weWluZyBhbGwgb2Ygc3RydWN0IGNwdV91c2VyX3JlZ3MgaXMgZ2VuZXJhbGx5IHVu c2FmZSwgYXMgdGhlIHN0cnVjdHVyZQo+IGV4dGVuZHMgYmV5b25kIHRoZSBoYXJkd2FyZSBleGNl cHRpb24gZnJhbWUuCj4gCj4gVGhpcyBnZW5lcmFsbHkgY29waWVzIDMyIGJ5dGVzIGJleW9uZCB0 aGUgdG9wIG9mIHRoZSB2YWxpZCBzdGFjayBmcmFtZSwgYW5kIGluCj4gdGhlIGNhc2Ugb2YgdGhl IHRvcCBJU1Qgc3RhY2ssIGhpdHMgdGhlIHVubWFwcGVkIGd1YXJkIHBhZ2UuCj4gCj4gU2lnbmVk LW9mZi1ieTogQW5kcmV3IENvb3BlciA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4KPiAtLS0K PiBDQzogSmFuIEJldWxpY2ggPEpCZXVsaWNoQHN1c2UuY29tPgo+IAo+IFJGQywgYmVjYXVzZSBJ IGRvbid0IG5lY2Vzc2VyaWx5IGxpa2UgdGhpcyBmaXguICBJdCBpcyBkaXNhcHBvaW50aW5nIHRo YXQKPiBjcHVfdXNlcl9yZWdzIGlzIGluIHRoZSBwdWJsaWMgQVBJIGJlY2F1c2UgaXQgaGFzIG5v IHJlYWwgYnVpc25lc3MgbGl2aW5nCj4gdGhlcmUuCj4gCj4gTm93IHRoYXQgd2UgYXJlIDY0Yml0 IG9ubHksIHRoZSB2bTg2IGZpZWxkcyBhcmUgbmV2ZXIgdXNlZCBpbiBzdGFjayBmcmFtZXMsCj4g YW5kIG9ubHkgcmVhbGx5IHVzZWQgaW4gc3RydWN0IHZjcHUgd2hlbiBvdXQgb2YgY3VycmVudCBj b250ZXh0LiAgQSBkaWZmZXJlbnQKPiBmaXggd291bGQgYmUgdG8gcmVzcGVjaWZ5IGEgbmV3IHN0 cnVjdHVyZSB3aGljaCBpcyBpbnRlcm5hbCB0byBYZW4gYW5kIHN0b3BzCj4gYXQgdGhlIGhhcmR3 YXJlIGZyYW1lLCBhbmQgYWRkIGEgdGlueSBiaXQgb2YgY29tcGF0IGdsdWUgZm9yIHRoZSBoeXBl cmNhbGxzCj4gd2hpY2ggdXNlIHN0cnVjdCBjcHVfdXNlcl9yZWdzLgo+IAo+IFRoZSBlbmQgcmVz dWx0IG9mIHRoaXMgd291bGQgYmUgdGhhdCByZWdzLT4gZG9lc24ndCBoYXZlIGFueSBmaWVsZHMg d2hpY2ggY2FuCj4gcG9pbnQgb2ZmIHRoZSB2YWxpZCBzdGFjaywgYW5kIHdlIGNhbiBhY3R1YWxs eSBmaXggdGhlIHN0YWNrIGFsaWdubWVudAo+IHJlcXVpcmVtZW50cyBmb3IgRUZJIGFuZCBhdm9p ZCB0aGUgZHViaW91cyBib2RnZSBpbiBjL3MgZjZiN2ZlZGM4LiAgSXQgd2lsbAo+IGFsc28gYWxs b3cgdXMgdG8gbW9yZSBzZW5zaWJseSB1c2UgQVZYL0FWWDUxMiBpbiBYZW4gKHRoaW5rIG9wdGlt aXNlZAo+IGlkbGUtbG9vcCBzY3J1YmJpbmcpLgoKSSdtIGhhdmluZyBkaWZmaWN1bHR5IGNvbm5l Y3Rpbmcgc3RhY2sgYWxpZ25tZW50IGFuZCB0aGUgcHJlc2VuY2Ugb3IKYWJzZW5jZSBvZiB0aGVz ZSBmaWVsZHMgKGl0J3MgZm91ciA2NC1iaXQgc2xvdHMgeW91J2QgZ2V0IHJpZCBvZiwgd2hpY2gg aGFzIG5vCmVmZmVjdCBhdCBhbGwgb24gb3ZlcmFsbCBhbGlnbm1lbnQgYWZhaWNzKSwgb3IgdXNl IG9mIFNJTUQgaW5zbnMuIENvdWxkIHlvdQplbmxpZ2h0ZW4gbWU/Cgo+IC0tLSBhL3hlbi9hcmNo L3g4Ni94ODZfNjQvdHJhcHMuYwo+ICsrKyBiL3hlbi9hcmNoL3g4Ni94ODZfNjQvdHJhcHMuYwo+ IEBAIC05NSwxMSArOTUsMTggQEAgc3RhdGljIHZvaWQgX3Nob3dfcmVnaXN0ZXJzKAo+ICAKPiAg dm9pZCBzaG93X3JlZ2lzdGVycyhjb25zdCBzdHJ1Y3QgY3B1X3VzZXJfcmVncyAqcmVncykKPiAg ewo+IC0gICAgc3RydWN0IGNwdV91c2VyX3JlZ3MgZmF1bHRfcmVncyA9ICpyZWdzOwo+ICsgICAg c3RydWN0IGNwdV91c2VyX3JlZ3MgZmF1bHRfcmVnczsKPiAgICAgIHVuc2lnbmVkIGxvbmcgZmF1 bHRfY3JzWzhdOwo+ICAgICAgZW51bSBjb250ZXh0IGNvbnRleHQ7Cj4gICAgICBzdHJ1Y3QgdmNw dSAqdiA9IHN5c3RlbV9zdGF0ZSA+PSBTWVNfU1RBVEVfc21wX2Jvb3QgPyBjdXJyZW50IDogTlVM TDsKPiAgCj4gKyAgICAvKgo+ICsgICAgICogQ29weSB1cCB0byB0aGUgdG9wIG9mIHRoZSBoYXJk d2FyZSBleGNlcHRpb24gZnJhbWUuICBXaGVuIGluIElTVAo+ICsgICAgICogY29udGV4dCwgdGhl IHZtODYgZmllbGRzIGFyZW4ndCB2YWxpZCBhbmQgcG9pbnQgaW50byB0aGUgYWRqYWNlbnQKPiAr ICAgICAqIHN0YWNrLCB3aGljaCBpbiB0aGUgY2FzZSBvZiB0aGUgaGlnaGVzdCBJU1QgaXMgdGhl IHVubWFwcGVkIGd1YXJkIHBhZ2UuCj4gKyAgICAgKi8KPiArICAgIG1lbWNweSgmZmF1bHRfcmVn cywgcmVncywgb2Zmc2V0b2Yoc3RydWN0IGNwdV91c2VyX3JlZ3MsIGVzKSk7CgpJIGRvbid0IHJl YWxseSBsaWtlIHRoZSBvcGVuLWNvZGVkIHJlZmVyZW5jZSB0byBlcyAtIGNvdWxkIEkgdGFsayB5 b3UgaW50bwpzcGxpdHRpbmcgb3V0IGEgbWFjcm8sIHRoZSBkZWZpbml0aW9uIG9mIHdoaWNoIHdv dWxkIGJlIHB1dCBuZXh0IHRvCmdldF9zdGFja19ib3R0b20oKSdzPyBUaGUgbW9yZSB0aGF0IHRo ZXJlJ3MgYWxyZWFkeSBhIHNpbWlsYXIgb3Blbi0KY29kZWQgdXNlIGluIGxvYWRfc3lzdGVtX3Rh YmxlcygpLiBPdGhlciB0aGFuIHRoYXQgSSdtIGZpbmUgd2l0aCB0aGlzLApubyBtYXR0ZXIgd2hl dGhlciBhcyBhIHRlbXBvcmFyeSBvciBhIHBlcm1hbmVudCBtZWFzdXJlLgoKSmFuCgoKCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWls aW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVu cHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=