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spf=none smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1izKWQ-00058y-RD; Wed, 05 Feb 2020 13:15:14 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1izKWP-00058l-9n for xen-devel@lists.xenproject.org; Wed, 05 Feb 2020 13:15:13 +0000 X-Inumbo-ID: 8a6bc236-4819-11ea-8396-bc764e2007e4 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 8a6bc236-4819-11ea-8396-bc764e2007e4; Wed, 05 Feb 2020 13:15:12 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id D4823AC69; Wed, 5 Feb 2020 13:15:11 +0000 (UTC) From: Jan Beulich To: "xen-devel@lists.xenproject.org" References: <730add36-bfa0-e1bb-e2cb-b5570540688c@suse.com> Message-ID: <043fa4ef-b46d-6ddf-8348-33b3bce69b3f@suse.com> Date: Wed, 5 Feb 2020 14:15:19 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: <730add36-bfa0-e1bb-e2cb-b5570540688c@suse.com> Content-Language: en-US Subject: [Xen-devel] [PATCH 3/6] xmalloc: guard against integer overflow 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: Stefano Stabellini , Julien Grall , Wei Liu , Konrad Wilk , George Dunlap , Andrew Cooper , Ilja Van Sprundel , Ian Jackson Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" VGhlcmUgYXJlIGh5cGVyY2FsbCBoYW5kbGluZyBwYXRocyAoRUZJIG9uZXMgYXJlIHdoYXQgdGhp cyB3YXMgZm91bmQKd2l0aCkgbmVlZGluZyB0byBhbGxvY2F0ZSBidWZmZXJzIG9mIGEgY2FsbGVy IHNwZWNpZmllZCBzaXplLiBUaGlzIGlzCmdlbmVyYWxseSBmaW5lLCBhcyBvdXIgcGFnZSBhbGxv Y2F0b3IgZW5mb3JjZXMgYW4gdXBwZXIgYm91bmQgb24gYWxsCmFsbG9jYXRpb25zLiBIb3dldmVy LCBjZXJ0YWluIGV4dHJlbWVseSBsYXJnZSBzaXplcyBjb3VsZCwgd2hlbiBhZGRpbmcKaW4gYWxs b2NhdG9yIG92ZXJoZWFkLCByZXN1bHQgaW4gYW4gYXBwYXJlbnRseSB0aW55IGFsbG9jYXRpb24g c2l6ZSwKd2hpY2ggd291bGQgdHlwaWNhbGx5IHJlc3VsdCBpbiBlaXRoZXIgYSBzdWNjZXNzZnVs IGFsbG9jYXRpb24sIGJ1dCBhCnNldmVyZSBidWZmZXIgb3ZlcnJ1biB3aGVuIHVzaW5nIHRoYXQg bWVtb3J5IGJsb2NrLCBvciBpbiBhIGNyYXNoIHJpZ2h0CmluIHRoZSBhbGxvY2F0b3IgY29kZS4K ClJlcG9ydGVkLWJ5OiBJbGphIFZhbiBTcHJ1bmRlbCA8aXZhbnNwcnVuZGVsQGlvYWN0aXZlLmNv bT4KU2lnbmVkLW9mZi1ieTogSmFuIEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgpSZXZpZXdl ZC1ieTogR2VvcmdlIER1bmxhcCA8Z2VvcmdlLmR1bmxhcEBjaXRyaXguY29tPgoKLS0tIGEveGVu L2NvbW1vbi94bWFsbG9jX3Rsc2YuYworKysgYi94ZW4vY29tbW9uL3htYWxsb2NfdGxzZi5jCkBA IC0zNzgsNyArMzc4LDE3IEBAIHZvaWQgKnhtZW1fcG9vbF9hbGxvYyh1bnNpZ25lZCBsb25nIHNp emUKICAgICBpbnQgZmwsIHNsOwogICAgIHVuc2lnbmVkIGxvbmcgdG1wX3NpemU7CiAKLSAgICBz aXplID0gKHNpemUgPCBNSU5fQkxPQ0tfU0laRSkgPyBNSU5fQkxPQ0tfU0laRSA6IFJPVU5EVVBf U0laRShzaXplKTsKKyAgICBpZiAoIHNpemUgPCBNSU5fQkxPQ0tfU0laRSApCisgICAgICAgIHNp emUgPSBNSU5fQkxPQ0tfU0laRTsKKyAgICBlbHNlCisgICAgeworICAgICAgICB0bXBfc2l6ZSA9 IFJPVU5EVVBfU0laRShzaXplKTsKKyAgICAgICAgLyogR3VhcmQgYWdhaW5zdCBvdmVyZmxvdy4g Ki8KKyAgICAgICAgaWYgKCB0bXBfc2l6ZSA8IHNpemUgKQorICAgICAgICAgICAgcmV0dXJuIE5V TEw7CisgICAgICAgIHNpemUgPSB0bXBfc2l6ZTsKKyAgICB9CisKICAgICAvKiBSb3VuZGluZyB1 cCB0aGUgcmVxdWVzdGVkIHNpemUgYW5kIGNhbGN1bGF0aW5nIGZsIGFuZCBzbCAqLwogCiAgICAg c3Bpbl9sb2NrKCZwb29sLT5sb2NrKTsKQEAgLTU5NCw2ICs2MDQsMTAgQEAgdm9pZCAqX3htYWxs b2ModW5zaWduZWQgbG9uZyBzaXplLCB1bnNpZwogICAgICAgICBhbGlnbiA9IE1FTV9BTElHTjsK ICAgICBzaXplICs9IGFsaWduIC0gTUVNX0FMSUdOOwogCisgICAgLyogR3VhcmQgYWdhaW5zdCBv dmVyZmxvdy4gKi8KKyAgICBpZiAoIHNpemUgPCBhbGlnbiAtIE1FTV9BTElHTiApCisgICAgICAg IHJldHVybiBOVUxMOworCiAgICAgaWYgKCAheGVucG9vbCApCiAgICAgICAgIHRsc2ZfaW5pdCgp OwogCkBAIC02NDYsNiArNjYwLDEwIEBAIHZvaWQgKl94cmVhbGxvYyh2b2lkICpwdHIsIHVuc2ln bmVkIGxvbmcKICAgICAgICAgdW5zaWduZWQgbG9uZyB0bXBfc2l6ZSA9IHNpemUgKyBhbGlnbiAt IE1FTV9BTElHTjsKICAgICAgICAgY29uc3Qgc3RydWN0IGJoZHIgKmI7CiAKKyAgICAgICAgLyog R3VhcmQgYWdhaW5zdCBvdmVyZmxvdy4gKi8KKyAgICAgICAgaWYgKCB0bXBfc2l6ZSA8IHNpemUg KQorICAgICAgICAgICAgcmV0dXJuIE5VTEw7CisKICAgICAgICAgaWYgKCB0bXBfc2l6ZSA8IFBB R0VfU0laRSApCiAgICAgICAgICAgICB0bXBfc2l6ZSA9ICh0bXBfc2l6ZSA8IE1JTl9CTE9DS19T SVpFKSA/IE1JTl9CTE9DS19TSVpFIDoKICAgICAgICAgICAgICAgICBST1VORFVQX1NJWkUodG1w X3NpemUpOwoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f Clhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=