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 E034CC0015E for ; Thu, 20 Jul 2023 01:24:02 +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:MIME-Version:Date:Message-ID:From: References:CC:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=JE4AGyQm/QVMtln/70S6DupSrpQZA5IF7cZKvEXkipQ=; b=bUWgTh1XbzB/YznXX20A5cEQxP rYXqkL2ya2Q4umSq8JR8/NOKyaYVyPJAoLMu9sw98KoOTjCigycR4YxYLFwRJDEyX34rPguTTtiV6 k8Hm+jHIxDhTakx9orK3LIOriDX8ZN9HTeRT0UGbx5KSAG61+oU5mnm81Roj2Ym9kCcSeV3TZGQNB 2jwbMK2DPLqF3CbXBXGmYeXvr5PqY7j6U9KEXycprJPkT9nA+3Xyv9fKSS+diJUTylJiZV3utMF+F yat1FmX7DB8kraLfkxxJJcU4iSSGgPvutf5hkXNDa9r8TpXG0YT+HjVjOGHhfGjUWQkZQVN4k5DQG qu8NlU5A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qMIOS-009Ri3-03; Thu, 20 Jul 2023 01:23:48 +0000 Received: from szxga03-in.huawei.com ([45.249.212.189]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qMION-009Rg0-1T for linux-mtd@lists.infradead.org; Thu, 20 Jul 2023 01:23:45 +0000 Received: from kwepemm600013.china.huawei.com (unknown [172.30.72.53]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4R5vyn1WCBzLnrV; Thu, 20 Jul 2023 09:21:05 +0800 (CST) Received: from [10.174.178.46] (10.174.178.46) by kwepemm600013.china.huawei.com (7.193.23.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Thu, 20 Jul 2023 09:23:31 +0800 Subject: Re: [RFC PATCH 05/21] ubifs: Pass worst-case buffer size to compression routines To: Ard Biesheuvel CC: Eric Biggers , , Herbert Xu , Kees Cook , Haren Myneni , Nick Terrell , Minchan Kim , Sergey Senozhatsky , Jens Axboe , Giovanni Cabiddu , Richard Weinberger , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Steffen Klassert , , , , , , References: <20230718125847.3869700-1-ardb@kernel.org> <20230718125847.3869700-6-ardb@kernel.org> <20230718223813.GC1005@sol.localdomain> <3330004f-acac-81b4-e382-a17221a0a128@huawei.com> From: Zhihao Cheng Message-ID: <4fc9930e-152b-1de1-9532-d1eefa6c277c@huawei.com> Date: Thu, 20 Jul 2023 09:23:31 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: X-Originating-IP: [10.174.178.46] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemm600013.china.huawei.com (7.193.23.68) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230719_182343_824999_901438F6 X-CRM114-Status: GOOD ( 28.38 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org 5ZyoIDIwMjMvNy8xOSAyMjozOCwgQXJkIEJpZXNoZXV2ZWwg5YaZ6YGTOgo+IE9uIFdlZCwgMTkg SnVsIDIwMjMgYXQgMTY6MjMsIFpoaWhhbyBDaGVuZyA8Y2hlbmd6aGloYW8xQGh1YXdlaS5jb20+ IHdyb3RlOgo+Pgo+PiDlnKggMjAyMy83LzE5IDE2OjMzLCBBcmQgQmllc2hldXZlbCDlhpnpgZM6 Cj4+PiBPbiBXZWQsIDE5IEp1bCAyMDIzIGF0IDAwOjM4LCBFcmljIEJpZ2dlcnMgPGViaWdnZXJz QGtlcm5lbC5vcmc+IHdyb3RlOgo+Pj4+Cj4+Pj4gT24gVHVlLCBKdWwgMTgsIDIwMjMgYXQgMDI6 NTg6MzFQTSArMDIwMCwgQXJkIEJpZXNoZXV2ZWwgd3JvdGU6Cj4+Pj4+IEN1cnJlbnRseSwgdGhl IHViaWZzIGNvZGUgYWxsb2NhdGVzIGEgd29yc3QgY2FzZSBidWZmZXIgc2l6ZSB0bwo+Pj4+PiBy ZWNvbXByZXNzIGEgZGF0YSBub2RlLCBidXQgZG9lcyBub3QgcGFzcyB0aGUgc2l6ZSBvZiB0aGF0 IGJ1ZmZlciB0byB0aGUKPj4+Pj4gY29tcHJlc3Npb24gY29kZS4gVGhpcyBtZWFucyB0aGF0IHRo ZSBjb21wcmVzc2lvbiBjb2RlIHdpbGwgbmV2ZXIgdXNlCj4+Cj4+IEkgdGhpbmsgeW91IG1lYW4g dGhlICdvdXRfbGVuJyB3aGljaCBkZXNjcmliZXMgdGhlIGxlbmdoIG9mICdidWYnIGlzCj4+IHBh c3NlZCBpbnRvIHViaWZzX2RlY29tcHJlc3MsIHdoaWNoIGVmZmVjdHMgdGhlIHJlc3VsdCBvZgo+ PiBkZWNvbXByZXNzb3IoZWcuIGx6NCB1c2VzIGxlbmd0aCB0byBjYWxjdWxhdGUgdGhlIGJ1ZmZl ciBlbmQgcG9zKS4KPj4gU28sIHdlIHNob3VsZCBwYXNzIHRoZSByZWFsIGxlbmdodGggb2YgJ2J1 ZicuCj4+Cj4gCj4gWWVzLCB0aGF0IGlzIHdoYXQgSSBtZWFudC4KPiAKPiBCdXQgRXJpYyBtYWtl cyBhIGdvb2QgcG9pbnQsIGFuZCBsb29raW5nIGEgYml0IG1vcmUgY2xvc2VseSwgdGhlcmUgaXMK PiByZWFsbHkgbm8gbmVlZCBmb3IgdGhlIG11bHRpcGxpY2F0aW9uIGhlcmU6IHdlIGtub3cgdGhl IHNpemUgb2YgdGhlCj4gZGVjb21wcmVzc2VkIGRhdGEsIHNvIHdlIGRvbid0IG5lZWQgdGhlIGFk ZGl0aW9uYWwgc3BhY2UuCj4gCgpSaWdodCwgd2UgZ2V0ICdvdXRfbGVuJyBmcm9tICdkbi0+c2l6 ZScgd2hpY2ggaXMgdGhlIGxlbmd0aCBvZiAKdW5jb21wcmVzc2VkIGRhdGEuIHViaWZzX2NvbXBy ZXNzIG1ha2VzIHN1cmUgdGhlIGNvbXByZXNzZWQgbGVuZ3RoIGlzIApzbWFsbGVyIHRoYW4gb3Jp Z2luYWwgbGVuZ3RoLgoKPiBJIGludGVuZCB0byBkcm9wIHRoaXMgcGF0Y2gsIGFuZCByZXBsYWNl IGl0IHdpdGggdGhlIGZvbGxvd2luZzoKPiAKPiAtLS0tLS0tLS0tLS0tLS0tODwtLS0tLS0tLS0t LS0tLQo+IAo+IEN1cnJlbnRseSwgd2hlbiB0cnVuY2F0aW5nIGEgZGF0YSBub2RlLCBhIGRlY29t cHJlc3Npb24gYnVmZmVyIGlzCj4gYWxsb2NhdGVkIHRoYXQgaXMgdHdpY2UgdGhlIHNpemUgb2Yg dGhlIGRhdGEgbm9kZSdzIHVuY29tcHJlc3NlZCBzaXplLgo+IEhvd2V2ZXIsIHRoZSBmYWN0IHRo YXQgdGhpcyBzcGFjZSBpcyBhdmFpbGFibGUgaXMgbm90IGNvbW11bmljYXRlZCB0bwo+IHRoZSBj b21wcmVzc2lvbiByb3V0aW5lcywgYXMgb3V0X2xlbiBpdHNlbGYgaXMgbm90IHVwZGF0ZWQuCj4g Cj4gVGhlIGFkZGl0aW9uYWwgc3BhY2UgaXMgbm90IG5lZWRlZCBldmVuIGluIHRoZSB0aGVvcmV0 aWNhbCB3b3JzdCBjYXNlCj4gd2hlcmUgY29tcHJlc3Npb24gbWlnaHQgbGVhZCB0byBpbmFkdmVy dGVudCBleHBhbnNpb246IGZpcnN0IG9mIGFsbCwKPiBpbmNyZWFzaW5nIHRoZSBzaXplIG9mIHRo ZSBpbnB1dCBidWZmZXIgZG9lcyBub3QgaGVscCBtaXRpZ2F0ZSB0aGF0Cj4gaXNzdWUuIEFuZCBn aXZlbiB0aGUgdHJ1bmNhdGlvbiBvZiB0aGUgZGF0YSBub2RlIGFuZCB0aGUgZmFjdCB0aGF0IHRo ZQo+IG9yaWdpbmFsIGRhdGEgY29tcHJlc3NlZCB3ZWxsIGVub3VnaCB0byBwYXNzIHRoZSBVQklG U19NSU5fQ09NUFJFU1NfRElGRgo+IHRlc3QsIHRoZXJlIGlzIG5vIHdheSBvbiB0aGlzIHBhcnRp Y3VsYXIgY29kZSBwYXRoIHRoYXQgY29tcHJlc3Npb24KPiBjb3VsZCByZXN1bHQgaW4gZXhwYW5z aW9uIGJleW9uZCB0aGUgb3JpZ2luYWwgZGVjb21wcmVzc2VkIHNpemUsIGFuZCBzbwo+IG5vIG1p dGlnYXRpb24gaXMgbmVjZXNzYXJ5IHRvIGJlZ2luIHdpdGguCj4gCj4gU28gbGV0J3MganVzdCBk cm9wIFdPUlNUX0NPTVBSX0ZBQ1RPUiBoZXJlLgo+IAo+IFNpZ25lZC1vZmYtYnk6IEFyZCBCaWVz aGV1dmVsIDxhcmRiQGtlcm5lbC5vcmc+Cj4gCj4gZGlmZiAtLWdpdCBhL2ZzL3ViaWZzL2pvdXJu YWwuYyBiL2ZzL3ViaWZzL2pvdXJuYWwuYwo+IGluZGV4IGRjNTJhYzBmNGEzNDVmMzAuLjBiNTVj YmZlMGMzMDUwNWUgMTAwNjQ0Cj4gLS0tIGEvZnMvdWJpZnMvam91cm5hbC5jCj4gKysrIGIvZnMv dWJpZnMvam91cm5hbC5jCj4gQEAgLTE0ODksNyArMTQ4OSw3IEBAIHN0YXRpYyBpbnQgdHJ1bmNh dGVfZGF0YV9ub2RlKGNvbnN0IHN0cnVjdAo+IHViaWZzX2luZm8gKmMsIGNvbnN0IHN0cnVjdCBp bm9kZSAqaW4KPiAgICAgICAgICBpbnQgZXJyLCBkbGVuLCBjb21wcl90eXBlLCBvdXRfbGVuLCBk YXRhX3NpemU7Cj4gCj4gICAgICAgICAgb3V0X2xlbiA9IGxlMzJfdG9fY3B1KGRuLT5zaXplKTsK PiAtICAgICAgIGJ1ZiA9IGttYWxsb2NfYXJyYXkob3V0X2xlbiwgV09SU1RfQ09NUFJfRkFDVE9S LCBHRlBfTk9GUyk7Cj4gKyAgICAgICBidWYgPSBrbWFsbG9jKG91dF9sZW4sIEdGUF9OT0ZTKTsK PiAgICAgICAgICBpZiAoIWJ1ZikKPiAgICAgICAgICAgICAgICAgIHJldHVybiAtRU5PTUVNOwo+ IC4KPiAKClRoaXMgdmVyc2lvbiBsb29rcyBiZXR0ZXIuCgpSZXZpZXdlZC1ieTogWmhpaGFvIENo ZW5nIDxjaGVuZ3poaWhhbzFAaHVhd2VpLmNvbT4KCgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTGludXggTVREIGRpc2N1c3Npb24gbWFpbGlu ZyBsaXN0Cmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgt bXRkLwo=