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Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [PATCH 01/10] ima: implement function to allocate buffer at kexec load Content-Language: en-US To: Mimi Zohar , 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, Eric Biederman References: <20230703215709.1195644-1-tusharsu@linux.microsoft.com> <20230703215709.1195644-2-tusharsu@linux.microsoft.com> <494dffc6cc7cfb8c6ca78f3bae442d57362a8857.camel@linux.ibm.com> <31eb2a9c-7410-b655-43d2-3b2966d2d3da@linux.microsoft.com> <66ca5d5504291161d887d141bc43ce2a4c14ff8c.camel@linux.ibm.com> From: Tushar Sugandhi In-Reply-To: <66ca5d5504291161d887d141bc43ce2a4c14ff8c.camel@linux.ibm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230712_124953_313859_7FC62472 X-CRM114-Status: GOOD ( 22.56 ) 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 Ck9uIDcvMTEvMjMgMTQ6MTEsIE1pbWkgWm9oYXIgd3JvdGU6Cj4gT24gVHVlLCAyMDIzLTA3LTEx IGF0IDEwOjU5IC0wNzAwLCBUdXNoYXIgU3VnYW5kaGkgd3JvdGU6Cj4+IEFkZGluZyBFcmljIHRv IGNjLgo+Pgo+PiBPbiA3LzcvMjMgMDY6MDAsIE1pbWkgWm9oYXIgd3JvdGU6Cj4+PiBIaSBUdXNo YXIsCj4+Pgo+Pj4gT24gTW9uLCAyMDIzLTA3LTAzIGF0IDE0OjU3IC0wNzAwLCBUdXNoYXIgU3Vn YW5kaGkgd3JvdGU6Cj4+Pj4gSU1BIGRvZXMgbm90IHByb3ZpZGUgYSBtZWNoYW5pc20gdG8gYWxs b2NhdGUgbWVtb3J5IGZvciBJTUEgbG9nIHN0b3JhZ2UKPj4+PiBkdXJpbmcga2V4ZWMgb3BlcmF0 aW9uLgo+Pj4gVGhlIElNQSBtZWFzdXJlbWVudCBsaXN0IGlzIGN1cnJlbnRseSBiZWluZyBjYXJy aWVkIGFjcm9zcyBrZXhlYywgc28KPj4+IG9idmlvdXNseSBhIGJ1ZmZlciBpcyBiZWluZyBhbGxv Y2F0ZWQgZm9yIGl0LiAgSU1BIG5vdCBhbGxvY2F0aW5nCj4+PiBtZW1vcnkgZm9yIHRoZSBtZWFz dXJtZW50IGxpc3QgaXMgbm90IHRoZSBwcm9ibGVtIHN0YXRlbWVudC4gIFBsZWFzZQo+Pj4gY29u Y2lzZWx5IHByb3ZpZGUgdGhlIHByb2JsZW0gc3RhdGVtZW50LCBleHBsYWluaW5nIHdoeSBJTUEg bmVlZHMgdG8KPj4+IGFsbG9jYXRlIHRoZSBidWZmZXIuCj4+Pgo+PiBJIG1lYW50IElNQSBkb2Vz IG5vdCBwcm92aWRlIHNlcGFyYXRlIGZ1bmN0aW9ucyB0byBhbGxvY2F0ZSBidWZmZXIgYW5kCj4+ IHBvcHVsYXRlIG1lYXN1cmVtZW50cy4gIEJvdGggb3BlcmF0aW9ucyBhcmUgd3JhcHBlZCBpbiBh biBhdG9taWMKPj4gaW1hX2R1bXBfbWVhc3VyZW1lbnRfbGlzdCgpLgo+IE9rLgo+Cj4+IEFzIEkg bWVudGlvbmVkIGluIHRoZSBjb21tZW50IGluIHRoZSBjb3ZlciBsZXR0ZXIsIGlmIHRoZXJlIGlz IG5vIHN1Y2gKPj4gdGVjaG5pY2FsIGxpbWl0YXRpb24gdG8gYWxsb2NhdGUgdGhlIGJ1ZmZlciBh bmQgY29weSB0aGUgbWVhc3VyZW1lbnRzIGF0Cj4+IGtleGVjIOKAmGV4ZWN1dGXigJkg4oCTIEkg d2lsbCBtYWtlIHRoZSBuZWNlc3NhcnkgY29kZSBjaGFuZ2VzIGFuZCB1cGRhdGUgdGhlCj4+IGFi b3ZlIGxpbmUgaW4gdGhlIHBhdGNoIGRlc2NyaXB0aW9uIGFjY29yZGluZ2x5Lgo+IFRoZSAibm9y bWFsIiB3YXkgb2YgbWFraW5nIHRoaXMgdHlwZSBvZiBjaGFuZ2Ugd291bGQgYmUgdG8gc3BsaXQg dGhlCj4gZXhpc3RpbmcgaW1hX2R1bXBfbWVhc3VyZW1lbnRfbGlzdCgpIGZ1bmN0aW9uLiAgQ29w eWluZyB0aGUgbWVhc3VyZW1lbnQKPiBsaXN0IHdvdWxkIHN0aWxsIGJlIG5hbWVkIGltYV9kdW1w X21lYXN1cmVtZW50X2xpc3QoKS4gIFRoZSBvdGhlciBjb3VsZAo+IGJlIG5hbWVkIGltYV9hbGxv Y19rZXhlY19idWYoKS4gIEJvdGggZnVuY3Rpb25zIGluaXRpYWxseSB3b3VsZCBiZQo+IGNhbGxl ZC4KPgpTb3VuZHMgZ29vZC7CoCBJIHdpbGwgbWFrZSB0aGF0IGNoYW5nZS4KSSB3aWxsIGRlZmlu ZSBpbWFfYWxsb2Nfa2V4ZWNfYnVmKCkgdG8gYWxsb2NhdGUgbWVtb3J5IGF0IGtleGVjICdsb2Fk Jy4KQW5kIHVwZGF0ZSBpbWFfZHVtcF9tZWFzdXJlbWVudF9saXN0KCkgdG8gb25seSBjb3B5IHRo ZSBtZWFzdXJlbWVudHMuCgpCb3RoIHRoZSBmdW5jdGlvbnMgd2lsbCBiZSBjYWxsZWQgZHVyaW5n IGtleGVjICdsb2FkJy4KCkFuZCBvbmx5IHRoZSB1cGRhdGVkIGltYV9kdW1wX21lYXN1cmVtZW50 X2xpc3QoKSB3aWxsIGJlIGNhbGxlZApkdXJpbmcga2V4ZWMgJ2V4ZWN1dGUnLgoKUGxlYXNlIGNv cnJlY3QgbWUgaWYgSSBtaXN1bmRlcnN0b29kLgoKQlRXLCBhcyBkaXNjdXNzZWQgZWxzZXdoZXJl IEkgYW0gaG9waW5nIHRvIGdldCBjbGFyaXR5IG9uIGlmIHdlIGNhbiBtb3ZlCmV2ZXJ5dGhpbmcg KG1lbW9yeSBhbGxvY2F0aW9uIGFuZCBjb3B5aW5nIG1lYXN1cmVtZW50cykgdG8ga2V4ZWMgJ2V4 ZWN1dGUnLgoKTXkgY3VycmVudCB1bmRlcnN0YW5kaW5nIGlzIHNlZ21lbnQgbWFwcGluZyBtdXN0 IGhhcHBlbiBhdCBrZXhlYyAnbG9hZCcuCkhvcGVmdWxseSBzb21lb25lIG9uIHRoaXMgdGhyZWFk IGNhbiB2YWxpZGF0ZSBpZiBpdHMgdHJ1ZSBvciBub3QuCgo+IEVyaWMsIGJlc2lkZXMgdXBkYXRp bmcgdGhlIGJ1ZmZlciBhdCBrZXhlYyBleGVjdXRlLCBpcyB0aGVyZSBhbnl0aGluZwo+IGVsc2Ug dGhhdCBuZWVkcyB0byBiZSBkb25lIChlLmcuIHVwZGF0aW5nIGRpZ2VzdHMpPwo+Ckkgd2lsbCBh bHNvIHdhaXQgZm9yIGhpcyByZXNwb25zZS4gOikKPj4+PiBUaGUgZnVuY3Rpb24gc2hvdWxkIGhh bmRsZSB0aGUgc2NlbmFyaW8gd2hlcmUKPj4+PiB0aGUga2V4ZWMgbG9hZCBpcyBjYWxsZWQgbXVs dGlwbGUgdGltZXMuCj4+PiBDdXJyZW50bHkgdGhlIGJ1ZmZlciBpcyBiZWluZyBmcmVlZCB3aXRo IHRoZSBrZXhlYyAndW5sb2FkJy4gIFdpdGggdGhpcwo+Pj4gcGF0Y2ggSU1BIGlzIGFsbG9jYXRp bmcgYSBidWZmZXIgZm9yIHRoZSBtZWFzdXJlbWVudCBsaXN0LCB3aGljaCBuZWVkcwo+Pj4gdG8g YmUgZnJlZWQgaW5kZXBlbmRlbnRseSBvZiB0aGUga2V4ZWMgJ3VubG9hZCcuCj4+IElmIHdlIGVu ZCB1cCBhbGxvY2F0aW5nIHRoZSBidWZmZXIgYXQga2V4ZWMg4oCYZXhlY3V0ZeKAmSAod2hpY2gg cmVzdWx0cyBpbgo+PiBzb2Z0IGJvb3QgdG8gbmV4dCBLZXJuZWwpIOKAkyBpcyBpdCB0ZWNobmlj YWxseSBwb3NzaWJsZSB0aGF0Cj4+IGtleGVjIOKAmHVubG9hZOKAmSBiZWluZyBjYWxsZWQgYWZ0 ZXIgY2FsbGluZyBrZXhlYyDigJhleGVjdXRl4oCZPwo+PiBJZiBub3QsIHNob3VsZCBJIHN0aWxs IGZyZWUgdGhlIGJ1ZmZlciBhdCBrZXhlYyDigJh1bmxvYWTigJkgaW4gdGhpcwo+PiBzY2VuYXJp bz8KPiBUaGUgcXVlc3Rpb24gaXMgaG93IHRvIGFjY2VzcyB0aGUgYnVmZmVyIG9uY2Uga2V4ZWNf YWRkX2J1ZmZlcigpIGlzCj4gY2FsbGVkLgo+Cj4gTWltaQoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18Ka2V4ZWMgbWFpbGluZyBsaXN0CmtleGVjQGxpc3Rz LmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5m by9rZXhlYwo=