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 B998FC7EE31 for ; Fri, 27 Jun 2025 07:32:58 +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=ApCrrieHkiB8bk8diZhb1jS6tsky+2c37/tYHjlbInM=; b=B+qS/z1pD363Z3 ++20Lip+op2frkNFy9jMMB8ffnIQ0eKIe6AgMbr53Q7PZSm0Rpg8IcTHooiMc8Bval5raraWvq98A 46J8HkVtXymFle2J0zN0RbhRdLo2eLv/SVh85nccXjrfw1dN5J4IqVQgBpAFKx5kryKBVykivV629 j8S4jPEv7kTai1jVlwClWm5NjtM7W8P5YVgwffy80Njs4zWKwo+HEWMx4s4k1UTLqQ9h8794sr5/M gXRt3yvULKhjglWafGMZqL265CsYbn6tH9i6qwSsdG+YTAlBYn7dlKsy4wo+2Z13FaOVKVrU9bglk cwLUYS2kD7oTv+1+/lqg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uV3Zn-0000000DpoT-47LQ; Fri, 27 Jun 2025 07:32:47 +0000 Received: from out-188.mta0.migadu.com ([2001:41d0:1004:224b::bc]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uV3Ja-0000000Do4z-3m7B for linux-riscv@lists.infradead.org; Fri, 27 Jun 2025 07:16:04 +0000 Message-ID: <1d39b66e-4009-4143-a8fa-5d876bc1f7e7@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1751008550; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2YlWsvrV7BaACfyKv597+qNsvY3pISsv0aYbyAd91Ns=; b=b/S9FkV17dZyBU9gyIoqvCZ9lEWKMXK/izhpXtTf2yF3lzMVVnGX5YDWIEAMOyw+JsnWYy ZS/rlXdv+yGYpIGe7LtEkl5IvH7HC+w5BVIfUfUlYeVeQFfEQNv2+ilmf3FIPf6WpIp1B5 GZr8YjBl/kjDa13f8vVty5wzMBiXjgI= Date: Fri, 27 Jun 2025 15:15:41 +0800 MIME-Version: 1.0 Subject: Re: [PATCH v2 1/1] mm/rmap: fix potential out-of-bounds page table access during batched unmap Content-Language: en-US To: Barry Song <21cnbao@gmail.com> Cc: akpm@linux-foundation.org, david@redhat.com, baolin.wang@linux.alibaba.com, chrisl@kernel.org, kasong@tencent.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, lorenzo.stoakes@oracle.com, ryan.roberts@arm.com, v-songbaohua@oppo.com, x86@kernel.org, huang.ying.caritas@gmail.com, zhengtangquan@oppo.com, riel@surriel.com, Liam.Howlett@oracle.com, vbabka@suse.cz, harry.yoo@oracle.com, mingzhe.yang@ly.com, stable@vger.kernel.org, Lance Yang References: <20250627062319.84936-1-lance.yang@linux.dev> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Lance Yang In-Reply-To: X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250627_001603_072213_D09C42B0 X-CRM114-Status: GOOD ( 12.94 ) X-BeenThere: linux-riscv@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: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org CgpPbiAyMDI1LzYvMjcgMTQ6NTUsIEJhcnJ5IFNvbmcgd3JvdGU6Cj4gT24gRnJpLCBKdW4gMjcs IDIwMjUgYXQgNjo1MuKAr1BNIEJhcnJ5IFNvbmcgPDIxY25iYW9AZ21haWwuY29tPiB3cm90ZToK Pj4KPj4gT24gRnJpLCBKdW4gMjcsIDIwMjUgYXQgNjoyM+KAr1BNIExhbmNlIFlhbmcgPGlvd29y a2VyMEBnbWFpbC5jb20+IHdyb3RlOgo+Pj4KPj4+IEZyb206IExhbmNlIFlhbmcgPGxhbmNlLnlh bmdAbGludXguZGV2Pgo+Pj4KPj4+IEFzIHBvaW50ZWQgb3V0IGJ5IERhdmlkWzFdLCB0aGUgYmF0 Y2hlZCB1bm1hcCBsb2dpYyBpbiB0cnlfdG9fdW5tYXBfb25lKCkKPj4+IGNhbiByZWFkIHBhc3Qg dGhlIGVuZCBvZiBhIFBURSB0YWJsZSBpZiBhIGxhcmdlIGZvbGlvIGlzIG1hcHBlZCBzdGFydGlu ZyBhdAo+Pj4gdGhlIGxhc3QgZW50cnkgb2YgdGhhdCB0YWJsZS4gSXQgd291bGQgYmUgcXVpdGUg cmFyZSBpbiBwcmFjdGljZSwgYXMKPj4+IE1BRFZfRlJFRSB0eXBpY2FsbHkgc3BsaXRzIHRoZSBs YXJnZSBmb2xpbyA7KQo+Pj4KPj4+IFNvIGxldCdzIGZpeCB0aGUgcG90ZW50aWFsIG91dC1vZi1i b3VuZHMgcmVhZCBieSByZWZhY3RvcmluZyB0aGUgbG9naWMgaW50bwo+Pj4gYSBuZXcgaGVscGVy LCBmb2xpb191bm1hcF9wdGVfYmF0Y2goKS4KPj4+Cj4+PiBUaGUgbmV3IGhlbHBlciBub3cgY29y cmVjdGx5IGNhbGN1bGF0ZXMgdGhlIHNhZmUgbnVtYmVyIG9mIHBhZ2VzIHRvIHNjYW4gYnkKPj4+ IGxpbWl0aW5nIHRoZSBvcGVyYXRpb24gdG8gdGhlIGJvdW5kYXJpZXMgb2YgdGhlIGN1cnJlbnQg Vk1BIGFuZCB0aGUgUFRFCj4+PiB0YWJsZS4KPj4+Cj4+PiBJbiBhZGRpdGlvbiwgdGhlICJhbGwt b3Itbm90aGluZyIgYmF0Y2hpbmcgcmVzdHJpY3Rpb24gaXMgcmVtb3ZlZCB0bwo+Pj4gc3VwcG9y dCBwYXJ0aWFsIGJhdGNoZXMuIFRoZSByZWZlcmVuY2UgY291bnRpbmcgaXMgYWxzbyBjbGVhbmVk IHVwIHRvIHVzZQo+Pj4gZm9saW9fcHV0X3JlZnMoKS4KPj4+Cj4+PiBbMV0gaHR0cHM6Ly9sb3Jl Lmtlcm5lbC5vcmcvbGludXgtbW0vYTY5NDM5OGMtOWYwMy00NzM3LTgxYjktN2U0OWM4NTdmY2Jl QHJlZGhhdC5jb20KPj4+Cj4+Cj4+IFdoYXQgYWJvdXQgPwo+Pgo+PiBBcyBwb2ludGVkIG91dCBi eSBEYXZpZFsxXSwgdGhlIGJhdGNoZWQgdW5tYXAgbG9naWMgaW4gdHJ5X3RvX3VubWFwX29uZSgp Cj4+IG1heSByZWFkIHBhc3QgdGhlIGVuZCBvZiBhIFBURSB0YWJsZSB3aGVuIGEgbGFyZ2UgZm9s aW8gc3BhbnMgYWNyb3NzIHR3byBQTURzLAo+PiBwYXJ0aWN1bGFybHkgYWZ0ZXIgYmVpbmcgcmVt YXBwZWQgd2l0aCBtcmVtYXAoKS4gVGhpcyBwYXRjaCBmaXhlcyB0aGUKPj4gcG90ZW50aWFsIG91 dC1vZi1ib3VuZHMgYWNjZXNzIGJ5IGNhcHBpbmcgdGhlIGJhdGNoIGF0IHZtX2VuZCBhbmQgdGhl IFBNRAo+PiBib3VuZGFyeS4KPj4KPj4gSXQgYWxzbyByZWZhY3RvcnMgdGhlIGxvZ2ljIGludG8g YSBuZXcgaGVscGVyLCBmb2xpb191bm1hcF9wdGVfYmF0Y2goKSwKPj4gd2hpY2ggc3VwcG9ydHMg YmF0Y2hpbmcgYmV0d2VlbiAxIGFuZCBmb2xpb19ucl9wYWdlcy4gVGhpcyBpbXByb3ZlcyBjb2Rl Cj4+IGNsYXJpdHkuIE5vdGUgdGhhdCBzdWNoIGNhc2VzIGFyZSByYXJlIGluIHByYWN0aWNlLCBh cyBNQURWX0ZSRUUgdHlwaWNhbGx5Cj4+IHNwbGl0cyBsYXJnZSBmb2xpb3MuCj4gCj4gU29ycnks IEkgbWVhbnQgdGhhdCBNQURWX0ZSRUUgdHlwaWNhbGx5IHNwbGl0cyBsYXJnZSBmb2xpb3MgaWYg dGhlIHNwZWNpZmllZAo+IHJhbmdlIGRvZXNuJ3QgY292ZXIgdGhlIGVudGlyZSBmb2xpby4KCkht bS4uLiBJIGdvdCBpdCB3cm9uZyBhcyB3ZWxsIDooIEl0J3MgdGhlIHBhcnRpYWwgY292ZXJhZ2Ug dGhhdCB0cmlnZ2VycyAKdGhlIHNwbGl0LgoKaG93IGFib3V0IHRoaXMgcmV2aXNlZCB2ZXJzaW9u OgoKQXMgcG9pbnRlZCBvdXQgYnkgRGF2aWRbMV0sIHRoZSBiYXRjaGVkIHVubWFwIGxvZ2ljIGlu IHRyeV90b191bm1hcF9vbmUoKQptYXkgcmVhZCBwYXN0IHRoZSBlbmQgb2YgYSBQVEUgdGFibGUg d2hlbiBhIGxhcmdlIGZvbGlvIHNwYW5zIGFjcm9zcyB0d28KUE1EcywgcGFydGljdWxhcmx5IGFm dGVyIGJlaW5nIHJlbWFwcGVkIHdpdGggbXJlbWFwKCkuIFRoaXMgcGF0Y2ggZml4ZXMKdGhlIHBv dGVudGlhbCBvdXQtb2YtYm91bmRzIGFjY2VzcyBieSBjYXBwaW5nIHRoZSBiYXRjaCBhdCB2bV9l bmQgYW5kIHRoZQpQTUQgYm91bmRhcnkuCgpJdCBhbHNvIHJlZmFjdG9ycyB0aGUgbG9naWMgaW50 byBhIG5ldyBoZWxwZXIsIGZvbGlvX3VubWFwX3B0ZV9iYXRjaCgpLAp3aGljaCBzdXBwb3J0cyBi YXRjaGluZyBiZXR3ZWVuIDEgYW5kIGZvbGlvX25yX3BhZ2VzLiBUaGlzIGltcHJvdmVzIGNvZGUK Y2xhcml0eS4gTm90ZSB0aGF0IHN1Y2ggYm91bmRhcnktc3RyYWRkbGluZyBjYXNlcyBhcmUgcmFy ZSBpbiBwcmFjdGljZSwgYXMKTUFEVl9GUkVFIHdpbGwgdHlwaWNhbGx5IHNwbGl0IGEgbGFyZ2Ug Zm9saW8gaWYgdGhlIGFkdmljZSByYW5nZSBkb2VzIG5vdApjb3ZlciB0aGUgZW50aXJlIGZvbGlv LgoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4 LXJpc2N2IG1haWxpbmcgbGlzdApsaW51eC1yaXNjdkBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6 Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtcmlzY3YK