From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9E533C001DF for ; Fri, 20 Oct 2023 20:39:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=O3Zfq3xT/ODsDLsn6jB2w2z0e316SJy4FsUhuQisoXo=; b=jVXgAWiGfocwNy SuypbUGTGiR7T+Kg742WW9B6B0AuzdQYs2kMvXLJJ+D98AT4fl1fU8g0TfeJ3GqMiiDkbo1h9KZVs EfhxZuLObGRRqhmkZYvyijt9YPbGO+/GTprSR5HYPlZNHsOQWg5ruXPOXYFxPAIA01ZjJcNV4S2Mt d2mYsZp+UKUrAv//1Uk4LEsr9JyHweQvq9LARRfAbHnMrf+SySlQJ83oxcUXDAglDTIzb9sGSNgzP WkXs4fG8Ke9IDYlOPVEC5GzC9KDYA8ziRThyN7ghIaXcixYrVdLYeeKb4m/na+IE4XqYBCMIRYb/9 g4hipp6UVakEuw3J0dWw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qtwHV-002zcE-2f; Fri, 20 Oct 2023 20:39:41 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qtwHT-002zbs-0Z for kexec@lists.infradead.org; Fri, 20 Oct 2023 20:39:40 +0000 Received: from [192.168.86.69] (unknown [50.46.228.62]) by linux.microsoft.com (Postfix) with ESMTPSA id 125D020B74C3; Fri, 20 Oct 2023 13:39:38 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 125D020B74C3 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1697834378; bh=nUkytYBweex8FSgiBNfhqS2Sgayb8/6IvaMM7FHfpuw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=rhia76cNBiD4gCSlrI5nPiVXjYyRYpSd1a606ghhKEF+3VR0DhHlY5P592bT5PrLI Y7qDls4yaoOq8fmRYVPxG22lfsmf6zKXhF1QhTFpK3V3zX7cEx0ratVQoDKM6MKiwd r8DzH2CRK3MVkPWVWUEuINinPQgHSZTglkT0rz4c= Message-ID: <55585644-2170-d462-4d64-ca3a963b30fe@linux.microsoft.com> Date: Fri, 20 Oct 2023 13:39:37 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [PATCH v2 6/7] ima: make the memory for events between kexec load and exec configurable Content-Language: en-US To: Stefan Berger , zohar@linux.ibm.com, ebiederm@xmission.com, noodles@fb.com, bauermann@kolabnow.com, kexec@lists.infradead.org, linux-integrity@vger.kernel.org Cc: code@tyhicks.com, nramas@linux.microsoft.com, paul@paul-moore.com References: <20231005182602.634615-1-tusharsu@linux.microsoft.com> <20231005182602.634615-7-tusharsu@linux.microsoft.com> From: Tushar Sugandhi In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231020_133939_257183_25C2A72F X-CRM114-Status: GOOD ( 19.96 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org CgpPbiAxMC8xMi8yMyAxNzoyNywgU3RlZmFuIEJlcmdlciB3cm90ZToKPiAKPiBPbiAxMC81LzIz IDE0OjI2LCBUdXNoYXIgU3VnYW5kaGkgd3JvdGU6Cj4+IElNQSBjdXJyZW50bHkgYWxsb2NhdGVz IGhhbGYgYSBQQUdFX1NJWkUgZm9yIHRoZSBleHRyYSBldmVudHMgdGhhdCB3b3VsZAo+PiBiZSBt ZWFzdXJlZCBiZXR3ZWVuIGtleGVjICdsb2FkJyBhbmQgJ2V4ZWN1dGUnLsKgIERlcGVuZGluZyBv biB0aGUgSU1BCj4+IHBvbGljeSBhbmQgdGhlIHN5c3RlbSBzdGF0ZSwgdGhhdCBtZW1vcnkgbWF5 IG5vdCBiZSBzdWZmaWNpZW50IHRvIGhvbGQKPj4gdGhlIGV4dHJhIElNQSBldmVudHMgbWVhc3Vy ZWQgYWZ0ZXIga2V4ZWMgJ2xvYWQnLsKgIFRoZSBtZW1vcnkKPj4gcmVxdWlyZW1lbnRzIHZhcnkg ZnJvbSBzeXN0ZW0gdG8gc3lzdGVtIGFuZCB0aGV5IHNob3VsZCBiZSBjb25maWd1cmFibGUuCj4+ Cj4+IERlZmluZSBhIEtjb25maWcgb3B0aW9uLCBJTUFfS0VYRUNfRVhUUkFfUEFHRVMsIHRvIGNv bmZpZ3VyZSB0aGUgbnVtYmVyCj4+IG9mIGV4dHJhIHBhZ2VzIHRvIGJlIGFsbG9jYXRlZCBmb3Ig SU1BIG1lYXN1cmVtZW50cyBhZGRlZCBpbiB0aGUgd2luZG93Cj4+IGZyb20ga2V4ZWMgJ2xvYWQn IHRvIGtleGVjICdleGVjdXRlJy4KPj4KPj4gVXBkYXRlIGltYV9hZGRfa2V4ZWNfYnVmZmVyKCkg ZnVuY3Rpb24gdG8gYWxsb2NhdGUgbWVtb3J5IGJhc2VkIG9uIHRoZQo+PiBLY29uZmlnIG9wdGlv biB2YWx1ZSwgcmF0aGVyIHRoYW4gdGhlIGN1cnJlbnRseSBoYXJkY29kZWQgb25lLgo+Pgo+PiBT aWduZWQtb2ZmLWJ5OiBUdXNoYXIgU3VnYW5kaGk8dHVzaGFyc3VAbGludXgubWljcm9zb2Z0LmNv bT4KPj4gLS0tCj4+IMKgIHNlY3VyaXR5L2ludGVncml0eS9pbWEvS2NvbmZpZ8KgwqDCoMKgIHzC oCA5ICsrKysrKysrKwo+PiDCoCBzZWN1cml0eS9pbnRlZ3JpdHkvaW1hL2ltYV9rZXhlYy5jIHwg MTMgKysrKysrKystLS0tLQo+PiDCoCAyIGZpbGVzIGNoYW5nZWQsIDE3IGluc2VydGlvbnMoKyks IDUgZGVsZXRpb25zKC0pCj4+Cj4+IGRpZmYgLS1naXQgYS9zZWN1cml0eS9pbnRlZ3JpdHkvaW1h L0tjb25maWcgCj4+IGIvc2VjdXJpdHkvaW50ZWdyaXR5L2ltYS9LY29uZmlnCj4+IGluZGV4IDYw YTUxMWM2YjU4My4uMWI1NWNkMmJjYjM2IDEwMDY0NAo+PiAtLS0gYS9zZWN1cml0eS9pbnRlZ3Jp dHkvaW1hL0tjb25maWcKPj4gKysrIGIvc2VjdXJpdHkvaW50ZWdyaXR5L2ltYS9LY29uZmlnCj4+ IEBAIC0zMzgsMyArMzM4LDEyIEBAIGNvbmZpZyBJTUFfRElTQUJMRV9IVEFCTEUKPj4gwqDCoMKg wqDCoCBkZWZhdWx0IG4KPj4gwqDCoMKgwqDCoCBoZWxwCj4+IMKgwqDCoMKgwqDCoMKgwqAgVGhp cyBvcHRpb24gZGlzYWJsZXMgaHRhYmxlIHRvIGFsbG93IG1lYXN1cmVtZW50IG9mIGR1cGxpY2F0 ZSAKPj4gcmVjb3Jkcy4KPj4gKwo+PiArY29uZmlnIElNQV9LRVhFQ19FWFRSQV9QQUdFUwo+PiAr wqDCoMKgIGludAo+PiArwqDCoMKgIGRlcGVuZHMgb24gSU1BICYmIElNQV9LRVhFQwo+PiArwqDC oMKgIGRlZmF1bHQgMTYKPj4gK8KgwqDCoCBoZWxwCj4+ICvCoMKgwqDCoMKgIElNQV9LRVhFQ19F WFRSQV9QQUdFUyBkZXRlcm1pbmVzIHRoZSBudW1iZXIgb2YgZXh0cmEKPj4gK8KgwqDCoMKgwqAg cGFnZXMgdG8gYmUgYWxsb2NhdGVkIGZvciBJTUEgbWVhc3VyZW1lbnRzIGFkZGVkIGluIHRoZQo+ PiArwqDCoMKgwqDCoCB3aW5kb3cgZnJvbSBrZXhlYyAnbG9hZCcgdG8ga2V4ZWMgJ2V4ZWN1dGUn Lgo+IAo+IAo+IE9uIHBwYzY0IGEgcGFnZSBpcyA2NGtiLiBJIHdvdWxkIGFzayBmb3IgYWRkaXRp b25hbCBrYiBoZXJlLgo+IAo+IApOb3Qgc3VyZSBJIHVuZGVyc3RhbmQuICBEbyB5b3UgbWVhbiBJ IHNob3VsZCBtYWtlIHRoZSBkZWZhdWx0IHZhbHVlIG9mCnRoZSBjb25maWcgSU1BX0tFWEVDX0VY VFJBX1BBR0VTIDY0IG9yIHNvbWV0aGluZz8KCkluIGNvZGUsIEkgbXVsdGlwbHkgdGhlIGNvbmZp ZyB2YWx1ZSB3aXRoIFBBR0VfU0laRS4gIFNvIG1vcmUgbWVtb3J5CndvdWxkIGJlIGFsbG9jYXRl ZCBvbiBwcGM2NCBmb3IgZ2l2ZW4gZGVmYXVsdCBjb25maWcgdmFsdWUuIENvdWxkIHlvdQpwbGVh c2UgY2xhcmlmeSB3aGF0IGNoYW5nZSB5b3UgYXJlIHN1Z2dlc3RpbmcgaGVyZT8KCgorICAgICAg ICBiaW5hcnlfcnVudGltZV9zaXplID0gaW1hX2dldF9iaW5hcnlfcnVudGltZV9zaXplKCkgKwor ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHNpemVvZihzdHJ1Y3QgaW1hX2tleGVjX2hk cikgKworICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIChDT05GSUdfSU1BX0tFWEVDX0VY VFJBX1BBR0VTICoKUEFHRV9TSVpFKTsKCn5UdXNoYXIKCj4+IGRpZmYgLS1naXQgYS9zZWN1cml0 eS9pbnRlZ3JpdHkvaW1hL2ltYV9rZXhlYy5jIAo+PiBiL3NlY3VyaXR5L2ludGVncml0eS9pbWEv aW1hX2tleGVjLmMKPj4gaW5kZXggMTNmYmJiOTAzMTliLi42Y2Q1ZjQ2YTcyMDggMTAwNjQ0Cj4+ IC0tLSBhL3NlY3VyaXR5L2ludGVncml0eS9pbWEvaW1hX2tleGVjLmMKPj4gKysrIGIvc2VjdXJp dHkvaW50ZWdyaXR5L2ltYS9pbWFfa2V4ZWMuYwo+PiBAQCAtMTUwLDE1ICsxNTAsMTggQEAgdm9p ZCBpbWFfYWRkX2tleGVjX2J1ZmZlcihzdHJ1Y3Qga2ltYWdlICppbWFnZSkKPj4gwqDCoMKgwqDC oCBpbnQgcmV0Owo+PiDCoMKgwqDCoMKgIC8qCj4+IC3CoMKgwqDCoCAqIFJlc2VydmUgYW4gZXh0 cmEgaGFsZiBwYWdlIG9mIG1lbW9yeSBmb3IgYWRkaXRpb25hbCBtZWFzdXJlbWVudHMKPj4gLcKg wqDCoMKgICogYWRkZWQgZHVyaW5nIHRoZSBrZXhlYyBsb2FkLgo+PiArwqDCoMKgwqAgKiBSZXNl cnZlIGV4dHJhIG1lbW9yeSBmb3IgbWVhc3VyZW1lbnRzIGFkZGVkIGluIHRoZSB3aW5kb3cgZnJv bQo+PiArwqDCoMKgwqAgKiBrZXhlYyAnbG9hZCcgdG8ga2V4ZWMgJ2V4ZWN1dGUnLgo+PiDCoMKg wqDCoMKgwqAgKi8KPj4gLcKgwqDCoCBiaW5hcnlfcnVudGltZV9zaXplID0gaW1hX2dldF9iaW5h cnlfcnVudGltZV9zaXplKCk7Cj4+ICvCoMKgwqAgYmluYXJ5X3J1bnRpbWVfc2l6ZSA9IGltYV9n ZXRfYmluYXJ5X3J1bnRpbWVfc2l6ZSgpICsKPj4gK8KgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqAgc2l6ZW9mKHN0cnVjdCBpbWFfa2V4ZWNfaGRyKSArCj4+ICvCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgIChDT05GSUdfSU1BX0tFWEVDX0VYVFJBX1BBR0VTICogUEFH RV9TSVpFKTsKPj4gKwo+PiDCoMKgwqDCoMKgIGlmIChiaW5hcnlfcnVudGltZV9zaXplID49IFVM T05HX01BWCAtIFBBR0VfU0laRSkKPj4gwqDCoMKgwqDCoMKgwqDCoMKgIGtleGVjX3NlZ21lbnRf c2l6ZSA9IFVMT05HX01BWDsKPj4gwqDCoMKgwqDCoCBlbHNlCj4+IC3CoMKgwqDCoMKgwqDCoCBr ZXhlY19zZWdtZW50X3NpemUgPSBBTElHTihpbWFfZ2V0X2JpbmFyeV9ydW50aW1lX3NpemUoKSAr Cj4+IC3CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBQQUdFX1NJ WkUgLyAyLCBQQUdFX1NJWkUpOwo+PiArwqDCoMKgwqDCoMKgwqAga2V4ZWNfc2VnbWVudF9zaXpl ID0gQUxJR04oYmluYXJ5X3J1bnRpbWVfc2l6ZSwgUEFHRV9TSVpFKTsKPj4gKwo+PiDCoMKgwqDC oMKgIGlmICgoa2V4ZWNfc2VnbWVudF9zaXplID09IFVMT05HX01BWCkgfHwKPj4gwqDCoMKgwqDC oMKgwqDCoMKgICgoa2V4ZWNfc2VnbWVudF9zaXplID4+IFBBR0VfU0hJRlQpID4gdG90YWxyYW1f cGFnZXMoKSAvIDIpKSB7Cj4+IMKgwqDCoMKgwqDCoMKgwqDCoCBwcl9lcnIoIkJpbmFyeSBtZWFz dXJlbWVudCBsaXN0IHRvbyBsYXJnZS5cbiIpOwoKX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX18Ka2V4ZWMgbWFpbGluZyBsaXN0CmtleGVjQGxpc3RzLmluZnJh ZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9rZXhl Ywo=