From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: [PATCH for-4.10] xen/domctl: Fix Xen heap leak via XEN_DOMCTL_getvcpucontext Date: Mon, 9 Oct 2017 11:07:18 +0100 Message-ID: <1507543638-13706-1-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.xen.org Sender: "Xen-devel" To: Xen-devel Cc: Andrew Cooper , Julien Grall , Jan Beulich List-Id: xen-devel@lists.xenproject.org VGhlIGJhY2tpbmcgc3RydWN0dXJlIGZvciBYRU5fRE9NQ1RMX2dldHZjcHVjb250ZXh0IGlzIG9u bHkgemVyb2VkIGluIHRoZSB4ODYKSFZNIGNhc2UuICBBdCB0aGUgdmVyeSBsZWFzdCwgdGhpcyBt ZWFucyB0aGF0IEFSTSByZXR1cm5zIGp1bmsgdGhyb3VnaCBpdHMKZmxhZ3MgZmllbGQgKGFzIGl0 IGlzIG9ubHkgZXZlciBjb25kaXRpb25hbGx5IG9yJ2QgaW50byksIGFuZCB4ODYgUFYgbGVha3MK ZGF0YSB0aHJvdWdoIGdkdF9mcmFtZXNbMTQuLi4xNV0uICAoQW4gZXhoYXVzdGl2ZSBzZWFyY2gg Zm9yIG90aGVyIGxlYWtzCmhhc24ndCBiZWVuIHBlcmZvcm1lZCkuCgpVbmNvbmRpdGlvbmFsbHkg emVybyB0aGUgbWVtb3J5IHVwb24gYWxsb2NhdGlvbiwgYW5kIGZvcmdvIHRoZSBkb3VibGUgY2xl YXIKZm9yIHg4NiBIVk0uICBUaGVzZSBoeXBlcmNhbGxzIGFyZSBub3Qgb24gaG90cGF0aHMuCgpO b3RlIHRoYXQgdGhpcyBkb2VzIG5vdCBxdWFsaWZ5IGZvciBhbiBYU0EuICBQZXIgWFNBLTc3LApY RU5fRE9NQ1RMX2dldHZjcHVjb250ZXh0IGlzIHVuc2FmZSBmb3IgZGlzYWdncmVnYXRpb24sIG1l YW5pbmcgdGhhdCBvbmx5IHRoZQpjb250cm9sIGRvbWFpbiBjYW4gdXNlIHRoaXMgaHlwZXJjYWxs LgoKU2lnbmVkLW9mZi1ieTogQW5kcmV3IENvb3BlciA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNv bT4KUmV2aWV3ZWQtYnk6IEphbiBCZXVsaWNoIDxqYmV1bGljaEBzdXNlLmNvbT4KLS0tCkNDOiBK dWxpZW4gR3JhbGwgPGp1bGllbi5ncmFsbEBhcm0uY29tPgoKVGhpcyBzaG91bGQgYmUgYmFja3Bv cnRlZCB0byBzdGFibGUgYnJhbmNoZXMKLS0tCiB4ZW4vYXJjaC94ODYvZG9tY3RsLmMgfCAyIC0t CiB4ZW4vY29tbW9uL2RvbWN0bC5jICAgfCAyICstCiAyIGZpbGVzIGNoYW5nZWQsIDEgaW5zZXJ0 aW9uKCspLCAzIGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL3hlbi9hcmNoL3g4Ni9kb21jdGwu YyBiL3hlbi9hcmNoL3g4Ni9kb21jdGwuYwppbmRleCA1NDBiYTA4Li4xYjIwOGY5IDEwMDY0NAot LS0gYS94ZW4vYXJjaC94ODYvZG9tY3RsLmMKKysrIGIveGVuL2FyY2gveDg2L2RvbWN0bC5jCkBA IC0xNTMwLDggKzE1MzAsNiBAQCB2b2lkIGFyY2hfZ2V0X2luZm9fZ3Vlc3Qoc3RydWN0IHZjcHUg KnYsIHZjcHVfZ3Vlc3RfY29udGV4dF91IGMpCiAgICAgYm9vbCBjb21wYXQgPSBpc19wdl8zMmJp dF9kb21haW4oZCk7CiAjZGVmaW5lIGMoZmxkKSAoIWNvbXBhdCA/IChjLm5hdC0+ZmxkKSA6IChj LmNtcC0+ZmxkKSkKIAotICAgIGlmICggIWlzX3B2X2RvbWFpbihkKSApCi0gICAgICAgIG1lbXNl dChjLm5hdCwgMCwgc2l6ZW9mKCpjLm5hdCkpOwogICAgIG1lbWNweSgmYy5uYXQtPmZwdV9jdHh0 LCB2LT5hcmNoLmZwdV9jdHh0LCBzaXplb2YoYy5uYXQtPmZwdV9jdHh0KSk7CiAgICAgYyhmbGFn cyA9IHYtPmFyY2gudmdjX2ZsYWdzICYgfihWR0NGX2kzODdfdmFsaWR8VkdDRl9pbl9rZXJuZWwp KTsKICAgICBpZiAoIHYtPmZwdV9pbml0aWFsaXNlZCApCmRpZmYgLS1naXQgYS94ZW4vY29tbW9u L2RvbWN0bC5jIGIveGVuL2NvbW1vbi9kb21jdGwuYwppbmRleCBkMDNiYmYyLi4zYzZmYTRlIDEw MDY0NAotLS0gYS94ZW4vY29tbW9uL2RvbWN0bC5jCisrKyBiL3hlbi9jb21tb24vZG9tY3RsLmMK QEAgLTg2OSw3ICs4NjksNyBAQCBsb25nIGRvX2RvbWN0bChYRU5fR1VFU1RfSEFORExFX1BBUkFN KHhlbl9kb21jdGxfdCkgdV9kb21jdGwpCiAgICAgICAgICAgICAgICAgICAgICA8IHNpemVvZihz dHJ1Y3QgY29tcGF0X3ZjcHVfZ3Vlc3RfY29udGV4dCkpOwogI2VuZGlmCiAgICAgICAgIHJldCA9 IC1FTk9NRU07Ci0gICAgICAgIGlmICggKGMubmF0ID0geG1hbGxvYyhzdHJ1Y3QgdmNwdV9ndWVz dF9jb250ZXh0KSkgPT0gTlVMTCApCisgICAgICAgIGlmICggKGMubmF0ID0geHphbGxvYyhzdHJ1 Y3QgdmNwdV9ndWVzdF9jb250ZXh0KSkgPT0gTlVMTCApCiAgICAgICAgICAgICBnb3RvIGdldHZj cHVjb250ZXh0X291dDsKIAogICAgICAgICB2Y3B1X3BhdXNlKHYpOwotLSAKMi4xLjQKCgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFp bGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy94 ZW4tZGV2ZWwK