From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: [PATCH] x86/traps: Fix cascade crash in show_registers() Date: Wed, 25 Jul 2018 20:15:57 +0100 Message-ID: <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: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Xen-devel Cc: Andrew Cooper , Jan Beulich List-Id: xen-devel@lists.xenproject.org Q29weWluZyBhbGwgb2Ygc3RydWN0IGNwdV91c2VyX3JlZ3MgaXMgZ2VuZXJhbGx5IHVuc2FmZSwg YXMgdGhlIHN0cnVjdHVyZQpleHRlbmRzIGJleW9uZCB0aGUgaGFyZHdhcmUgZXhjZXB0aW9uIGZy YW1lLgoKVGhpcyBnZW5lcmFsbHkgY29waWVzIDMyIGJ5dGVzIGJleW9uZCB0aGUgdG9wIG9mIHRo ZSB2YWxpZCBzdGFjayBmcmFtZSwgYW5kIGluCnRoZSBjYXNlIG9mIHRoZSB0b3AgSVNUIHN0YWNr LCBoaXRzIHRoZSB1bm1hcHBlZCBndWFyZCBwYWdlLgoKU2lnbmVkLW9mZi1ieTogQW5kcmV3IENv b3BlciA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4KLS0tCkNDOiBKYW4gQmV1bGljaCA8SkJl dWxpY2hAc3VzZS5jb20+CgpSRkMsIGJlY2F1c2UgSSBkb24ndCBuZWNlc3NlcmlseSBsaWtlIHRo aXMgZml4LiAgSXQgaXMgZGlzYXBwb2ludGluZyB0aGF0CmNwdV91c2VyX3JlZ3MgaXMgaW4gdGhl IHB1YmxpYyBBUEkgYmVjYXVzZSBpdCBoYXMgbm8gcmVhbCBidWlzbmVzcyBsaXZpbmcKdGhlcmUu CgpOb3cgdGhhdCB3ZSBhcmUgNjRiaXQgb25seSwgdGhlIHZtODYgZmllbGRzIGFyZSBuZXZlciB1 c2VkIGluIHN0YWNrIGZyYW1lcywKYW5kIG9ubHkgcmVhbGx5IHVzZWQgaW4gc3RydWN0IHZjcHUg d2hlbiBvdXQgb2YgY3VycmVudCBjb250ZXh0LiAgQSBkaWZmZXJlbnQKZml4IHdvdWxkIGJlIHRv IHJlc3BlY2lmeSBhIG5ldyBzdHJ1Y3R1cmUgd2hpY2ggaXMgaW50ZXJuYWwgdG8gWGVuIGFuZCBz dG9wcwphdCB0aGUgaGFyZHdhcmUgZnJhbWUsIGFuZCBhZGQgYSB0aW55IGJpdCBvZiBjb21wYXQg Z2x1ZSBmb3IgdGhlIGh5cGVyY2FsbHMKd2hpY2ggdXNlIHN0cnVjdCBjcHVfdXNlcl9yZWdzLgoK VGhlIGVuZCByZXN1bHQgb2YgdGhpcyB3b3VsZCBiZSB0aGF0IHJlZ3MtPiBkb2Vzbid0IGhhdmUg YW55IGZpZWxkcyB3aGljaCBjYW4KcG9pbnQgb2ZmIHRoZSB2YWxpZCBzdGFjaywgYW5kIHdlIGNh biBhY3R1YWxseSBmaXggdGhlIHN0YWNrIGFsaWdubWVudApyZXF1aXJlbWVudHMgZm9yIEVGSSBh bmQgYXZvaWQgdGhlIGR1YmlvdXMgYm9kZ2UgaW4gYy9zIGY2YjdmZWRjOC4gIEl0IHdpbGwKYWxz byBhbGxvdyB1cyB0byBtb3JlIHNlbnNpYmx5IHVzZSBBVlgvQVZYNTEyIGluIFhlbiAodGhpbmsg b3B0aW1pc2VkCmlkbGUtbG9vcCBzY3J1YmJpbmcpLgoKVGhvdWdodHM/Ci0tLQogeGVuL2FyY2gv eDg2L3g4Nl82NC90cmFwcy5jIHwgOSArKysrKysrKy0KIDEgZmlsZSBjaGFuZ2VkLCA4IGluc2Vy dGlvbnMoKyksIDEgZGVsZXRpb24oLSkKCmRpZmYgLS1naXQgYS94ZW4vYXJjaC94ODYveDg2XzY0 L3RyYXBzLmMgYi94ZW4vYXJjaC94ODYveDg2XzY0L3RyYXBzLmMKaW5kZXggZWQwMmI3OC4uNzBi ODg5YSAxMDA2NDQKLS0tIGEveGVuL2FyY2gveDg2L3g4Nl82NC90cmFwcy5jCisrKyBiL3hlbi9h cmNoL3g4Ni94ODZfNjQvdHJhcHMuYwpAQCAtOTUsMTEgKzk1LDE4IEBAIHN0YXRpYyB2b2lkIF9z aG93X3JlZ2lzdGVycygKIAogdm9pZCBzaG93X3JlZ2lzdGVycyhjb25zdCBzdHJ1Y3QgY3B1X3Vz ZXJfcmVncyAqcmVncykKIHsKLSAgICBzdHJ1Y3QgY3B1X3VzZXJfcmVncyBmYXVsdF9yZWdzID0g KnJlZ3M7CisgICAgc3RydWN0IGNwdV91c2VyX3JlZ3MgZmF1bHRfcmVnczsKICAgICB1bnNpZ25l ZCBsb25nIGZhdWx0X2Nyc1s4XTsKICAgICBlbnVtIGNvbnRleHQgY29udGV4dDsKICAgICBzdHJ1 Y3QgdmNwdSAqdiA9IHN5c3RlbV9zdGF0ZSA+PSBTWVNfU1RBVEVfc21wX2Jvb3QgPyBjdXJyZW50 IDogTlVMTDsKIAorICAgIC8qCisgICAgICogQ29weSB1cCB0byB0aGUgdG9wIG9mIHRoZSBoYXJk d2FyZSBleGNlcHRpb24gZnJhbWUuICBXaGVuIGluIElTVAorICAgICAqIGNvbnRleHQsIHRoZSB2 bTg2IGZpZWxkcyBhcmVuJ3QgdmFsaWQgYW5kIHBvaW50IGludG8gdGhlIGFkamFjZW50CisgICAg ICogc3RhY2ssIHdoaWNoIGluIHRoZSBjYXNlIG9mIHRoZSBoaWdoZXN0IElTVCBpcyB0aGUgdW5t YXBwZWQgZ3VhcmQgcGFnZS4KKyAgICAgKi8KKyAgICBtZW1jcHkoJmZhdWx0X3JlZ3MsIHJlZ3Ms IG9mZnNldG9mKHN0cnVjdCBjcHVfdXNlcl9yZWdzLCBlcykpOworCiAgICAgaWYgKCBndWVzdF9t b2RlKHJlZ3MpICYmIGlzX2h2bV92Y3B1KHYpICkKICAgICB7CiAgICAgICAgIHN0cnVjdCBzZWdt ZW50X3JlZ2lzdGVyIHNyZWc7Ci0tIAoyLjEuNAoKCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxp c3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9s aXN0aW5mby94ZW4tZGV2ZWw=