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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 Content-Language: en-US Subject: [Xen-devel] [PATCH] console: avoid buffer overrun in guest_console_write() X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Juergen Gross , Stefano Stabellini , Julien Grall , Wei Liu , Konrad Wilk , George Dunlap , Andrew Cooper , Ian Jackson Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Y29ucmluZ19wdXRzKCkgaGFzIGJlZW4gcmVxdWlyaW5nIGEgbnVsLXRlcm1pbmF0ZWQgc3RyaW5n LCB3aGljaCB0aGUKbG9jYWwga2J1ZltdIGRvZXNuJ3QgZ2V0IHNldCBmb3IgYW55bW9yZS4gQWRk IGEgbGVuZ3RoIHBhcmFtZXRlciB0byB0aGUKZnVuY3Rpb24sIGp1c3QgbGlrZSB3YXMgZG9uZSBm b3Igb3RoZXJzLCB0aHVzIGFsbG93aW5nIGVtYmVkZGVkIG51bCB0bwphbHNvIGJlIHJlYWQgdGhy b3VnaCBYRU5fU1lTQ1RMX3JlYWRjb25zb2xlLgoKV2hpbGUgdGhlcmUgZHJvcCBhIHN0cmF5IGNh c3Q6IEJvdGggb3BlcmFuZHMgb2YgLSBhcmUgYWxyZWFkeSB1aW50MzJfdC4KCkZpeGVzOiBlYTYw MWVjOTk5NWIgKCJ4ZW4vY29uc29sZTogUmV3b3JrIEhZUEVSQ0FMTF9jb25zb2xlX2lvIGludGVy ZmFjZSIpClJlcG9ydGVkLWJ5OiBKw7xyZ2VuIEdyb8OfIDxqZ3Jvc3NAc3VzZS5jb20+ClNpZ25l ZC1vZmYtYnk6IEphbiBCZXVsaWNoIDxqYmV1bGljaEBzdXNlLmNvbT4KCi0tLSBhL3hlbi9kcml2 ZXJzL2NoYXIvY29uc29sZS5jCisrKyBiL3hlbi9kcml2ZXJzL2NoYXIvY29uc29sZS5jCkBAIC0y NTcsMTYgKzI1NywxNCBAQCBzdGF0aWMgdm9pZCBkb19kZWNfdGhyZXNoKHVuc2lnbmVkIGNoYXIK ICAqICoqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioq KioqCiAgKi8KIAotc3RhdGljIHZvaWQgY29ucmluZ19wdXRzKGNvbnN0IGNoYXIgKnN0cikKK3N0 YXRpYyB2b2lkIGNvbnJpbmdfcHV0cyhjb25zdCBjaGFyICpzdHIsIHNpemVfdCBsZW4pCiB7Ci0g ICAgY2hhciBjOwotCiAgICAgQVNTRVJUKHNwaW5faXNfbG9ja2VkKCZjb25zb2xlX2xvY2spKTsK IAotICAgIHdoaWxlICggKGMgPSAqc3RyKyspICE9ICdcMCcgKQotICAgICAgICBjb25yaW5nW0NP TlJJTkdfSURYX01BU0soY29ucmluZ3ArKyldID0gYzsKKyAgICB3aGlsZSAoIGxlbi0tICkKKyAg ICAgICAgY29ucmluZ1tDT05SSU5HX0lEWF9NQVNLKGNvbnJpbmdwKyspXSA9ICpzdHIrKzsKIAot ICAgIGlmICggKHVpbnQzMl90KShjb25yaW5ncCAtIGNvbnJpbmdjKSA+IGNvbnJpbmdfc2l6ZSAp CisgICAgaWYgKCBjb25yaW5ncCAtIGNvbnJpbmdjID4gY29ucmluZ19zaXplICkKICAgICAgICAg Y29ucmluZ2MgPSBjb25yaW5ncCAtIGNvbnJpbmdfc2l6ZTsKIH0KIApAQCAtNTYyLDcgKzU2MCw3 IEBAIHN0YXRpYyBsb25nIGd1ZXN0X2NvbnNvbGVfd3JpdGUoWEVOX0dVRVMKIAogICAgICAgICAg ICAgaWYgKCBvcHRfY29uc29sZV90b19yaW5nICkKICAgICAgICAgICAgIHsKLSAgICAgICAgICAg ICAgICBjb25yaW5nX3B1dHMoa2J1Zik7CisgICAgICAgICAgICAgICAgY29ucmluZ19wdXRzKGti dWYsIGtjb3VudCk7CiAgICAgICAgICAgICAgICAgdGFza2xldF9zY2hlZHVsZSgmbm90aWZ5X2Rv bTBfY29uX3JpbmdfdGFza2xldCk7CiAgICAgICAgICAgICB9CiAKQEAgLTY4Nyw3ICs2ODUsNyBA QCBzdGF0aWMgdm9pZCBfX3B1dHN0cihjb25zdCBjaGFyICpzdHIpCiAgICAgfQogI2VuZGlmCiAK LSAgICBjb25yaW5nX3B1dHMoc3RyKTsKKyAgICBjb25yaW5nX3B1dHMoc3RyLCBsZW4pOwogCiAg ICAgaWYgKCAhY29uc29sZV9sb2Nrc19idXN0ZWQgKQogICAgICAgICB0YXNrbGV0X3NjaGVkdWxl KCZub3RpZnlfZG9tMF9jb25fcmluZ190YXNrbGV0KTsKCl9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVs QGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1h bi9saXN0aW5mby94ZW4tZGV2ZWw=