From nobody Wed Nov 12 00:32:07 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1566828263; cv=none; d=zoho.com; s=zohoarc; b=BFl6f8LvCGaCa1rnPkjGR4W+rHj5C8v3fRocgqqRVeN88U8MAyklGWyAgGrZI7Mf/vhFkanFVJ62ZyZECqrYVSl11Fu7ePibZ7FIh7wCh/bQuzr8TkbjTfkYjl3bw5i17Pp5xIrtgA4VPysAm3vfkCu81E8Hcr9TJXlbrO/z1Aw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1566828263; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=T9hSH8+ophemGmdCZZaFjKe3gZ5t0wc/N1gQGD4RpQE=; b=AArOkrc+vnGpQOxxZBaoQ9I+Rkj1LCyXjhRe6yV4hDxHjovC8vAuZQ6UwWxpo9uh9UXLE1JbeQ0p+1hiCy2i9/Bob/l2u+Ua0Ym2yv/KkpvzqmOikZJUEOn689kTohSNwgVrR3yo0j3Z1CQS4NFilq8oT8iuL3AMtUjKSRQoKaU= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1566828263479983.6913552836317; Mon, 26 Aug 2019 07:04:23 -0700 (PDT) Received: from localhost ([::1]:53230 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i2FbZ-00023k-Tg for importer@patchew.org; Mon, 26 Aug 2019 10:04:21 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38439) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i2FQJ-0000Vq-6y for qemu-devel@nongnu.org; Mon, 26 Aug 2019 09:52:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i2FQH-0007Uw-UY for qemu-devel@nongnu.org; Mon, 26 Aug 2019 09:52:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45020) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i2FQE-0007Pl-4d; Mon, 26 Aug 2019 09:52:38 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7489D190C019; Mon, 26 Aug 2019 13:52:31 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4EEC55D6C8; Mon, 26 Aug 2019 13:52:27 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Mon, 26 Aug 2019 16:51:03 +0300 Message-Id: <20190826135103.22410-14-mlevitsk@redhat.com> In-Reply-To: <20190826135103.22410-1-mlevitsk@redhat.com> References: <20190826135103.22410-1-mlevitsk@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.70]); Mon, 26 Aug 2019 13:52:31 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 13/13] qcrypto-luks: implement more rigorous header checking X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Fam Zheng , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , qemu-block@nongnu.org, Markus Armbruster , Max Reitz , Stefan Hajnoczi , Maxim Levitsky Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Check that keyslots don't overlap with the data, and check that keyslots don't overlap with each other. (this is done using naive O(n^2) nested loops, but since there are just 8 keyslots, this doesn't really matter. Signed-off-by: Maxim Levitsky --- crypto/block-luks.c | 46 +++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 44 insertions(+), 2 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index db0fb764b4..fdf4c41f8a 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -541,12 +541,12 @@ fail: static int qcrypto_block_luks_check_header(const QCryptoBlockLUKS *luks, Error **errp) { - int ret; + int ret =3D -EINVAL; + size_t i, j; =20 if (memcmp(luks->header.magic, qcrypto_block_luks_magic, QCRYPTO_BLOCK_LUKS_MAGIC_LEN) !=3D 0) { error_setg(errp, "Volume is not in LUKS format"); - ret =3D -EINVAL; goto fail; } =20 @@ -557,6 +557,48 @@ qcrypto_block_luks_check_header(const QCryptoBlockLUKS= *luks, Error **errp) goto fail; } =20 + /* Check all keyslots for corruption */ + for (i =3D 0 ; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS ; i++) { + + const QCryptoBlockLUKSKeySlot *slot1 =3D &luks->header.key_slots[i= ]; + unsigned int start1 =3D slot1->key_offset_sector; + unsigned int len1 =3D + qcrypto_block_luks_splitkeylen_sectors(luks, slot1->stripes); + + if (slot1->stripes =3D=3D 0) { + error_setg(errp, "Keyslot %zu is corrupted (stripes =3D=3D 0)"= , i); + goto fail; + } + + if (slot1->active !=3D QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED && + slot1->active !=3D QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED) { + error_setg(errp, + "Keyslot %zu state (active/disable) is corrupted", = i); + goto fail; + } + + if (start1 + len1 > luks->header.payload_offset_sector) { + error_setg(errp, + "Keyslot %zu is overlapping with the encrypted payl= oad", + i); + goto fail; + } + + for (j =3D i + 1 ; j < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS ; j++) { + const QCryptoBlockLUKSKeySlot *slot2 =3D &luks->header.key_slo= ts[j]; + unsigned int start2 =3D slot2->key_offset_sector; + unsigned int len2 =3D + qcrypto_block_luks_splitkeylen_sectors(luks, slot2->stripe= s); + + if (start1 + len1 > start2 && start2 + len2 > start1) { + error_setg(errp, + "Keyslots %zu and %zu are overlapping in the he= ader", + i, j); + goto fail; + } + } + + } return 0; fail: return ret; --=20 2.17.2