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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D756D3C52D for ; Thu, 17 Oct 2024 19:14:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1867D6B0083; Thu, 17 Oct 2024 15:14:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 136846B0085; Thu, 17 Oct 2024 15:14:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 025046B0088; Thu, 17 Oct 2024 15:14:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id D23906B0083 for ; Thu, 17 Oct 2024 15:14:18 -0400 (EDT) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id CAC4F1A15DF for ; Thu, 17 Oct 2024 19:13:57 +0000 (UTC) X-FDA: 82684044450.09.365A2CA Received: from mail-wm1-f52.google.com (mail-wm1-f52.google.com [209.85.128.52]) by imf16.hostedemail.com (Postfix) with ESMTP id CB069180015 for ; Thu, 17 Oct 2024 19:14:05 +0000 (UTC) Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=NJBsssd4; spf=pass (imf16.hostedemail.com: domain of pedro.falcato@gmail.com designates 209.85.128.52 as permitted sender) smtp.mailfrom=pedro.falcato@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1729192310; h=from:from:sender: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:dkim-signature; bh=jRchpYD2y5fPxBSlIYESO5pAsIBC81GMZW6SoYg2m2w=; b=QctMJZW8uuTVQeIHuWhITSHUq2SCAbvMdQFSkQUWaVyOVpH9euTPRva1WIzNAxIKsyuB7I kJCiMQpObgvBnoaNckVcB5DqvXxZjL0u6TG6WEL2G0zkP8spdQ+DfNdZhRrjcJ5oqHYMjB wYYsUtm8LIURgccEsSMQQ9WMkfBeoGo= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1729192310; a=rsa-sha256; cv=none; b=wIzj5kODxC18n+Litei7idDvKDcRMnveKPDzeFAtP4UUJiZDMPMhGWe73JpKunoLyLMf60 XaeRx3Hx5Ft/OGJHKxwUiUq/PvdvIK9hxh+KzlT3JgXgEjChtt0fRbMmhTk8dgOjPZecnb r0VXHszlNnd2yTEkWA4SfO33x0xOHiM= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=NJBsssd4; spf=pass (imf16.hostedemail.com: domain of pedro.falcato@gmail.com designates 209.85.128.52 as permitted sender) smtp.mailfrom=pedro.falcato@gmail.com; dmarc=pass (policy=none) header.from=gmail.com Received: by mail-wm1-f52.google.com with SMTP id 5b1f17b1804b1-43055b43604so13829145e9.3 for ; Thu, 17 Oct 2024 12:14:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729192454; x=1729797254; darn=kvack.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=jRchpYD2y5fPxBSlIYESO5pAsIBC81GMZW6SoYg2m2w=; b=NJBsssd4J/GXlCHL6LfMAsVtQicjEMlwDoGn3HM/w0HIF/OmMb4dZsoh5c1eY6vPBy scaj+QFIDE6xP3BOtWCrQPwJT3WOir34GbJ6WigugjFqNIZyoi+RBv1QokveKs+11YaA 8opu15OyBPlk+LIJeFdUKEoB1NwkSC6hD1ig3/RRAlLyU8C5GSjsMzc7D/4UWctj8D+d 6EN+OtWqJ6LIjWjxS+jGUiureF/czMH8AFbIrrdvcyBaFnYkaORyOZFVZM2gHza0i+cM nbZxbvsjdel/lAUEsBPmfCjDNxEWS9DBUBDbf+M8G3+jhn8h75sAF1q+H5WPkCm4P4zs p/CA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729192454; x=1729797254; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=jRchpYD2y5fPxBSlIYESO5pAsIBC81GMZW6SoYg2m2w=; b=mfTcSoz1Vkf0S7CkC3+9Z7vgPbKeIKgtLQhkWwcsdSkyZu0UrKEJPj9jwp+ukLybKb Oxfm9VlUdYeNgmqbyuvp8kpPN4VTiPu/nYevVuCYwlOJwtqRg2KQlTey9XHJCrxmZkGQ Lapv2lK3qf8hp74VBLFchsAF7U4vrQUIlEPp+ECSg9d48ST9OqBN527fK+cdB/09kSvq mRmeGe2XWF4dlkBaC5YrfU5ml7uVBHFM6jBFKZ0EiAgT9vISxpTbOR/W0g3yocXgUotR vG1I0IblwZkLQKq++Pz5VsQYWWXoAy4axpOJIWk/vNlHxRG3LEZ5TmKclX9l6w0rrsob U3XQ== X-Forwarded-Encrypted: i=1; AJvYcCXff+gZfBugdrFxO4qacrW9nMbcnF5OLjSR6p974SNfje6H5EezvdcSYS0VQ8lTNL6o3x1+b2chHA==@kvack.org X-Gm-Message-State: AOJu0YzM3MsNfUh3ZAV3ms8rdvGQCN4opS0hIt9TJluwwffNUv1oYU4k y+VMRj38YDZiyRnkjPy1VAdQSp/FCXPsrwuQnDBRJLSe+aQ3dhil X-Google-Smtp-Source: AGHT+IELI/vhZ++02PVwYoLIIBS5XpsZPQhiAGp5oouGXvEhqky8ICI624eJZTe0MWdlvdoKMFWK0A== X-Received: by 2002:a05:600c:5110:b0:431:59ab:15cf with SMTP id 5b1f17b1804b1-43159ab1711mr25678705e9.19.1729192454113; Thu, 17 Oct 2024 12:14:14 -0700 (PDT) Received: from PC-PEDRO-ARCH ([2001:818:e92f:6400:a118:25f3:b27f:9f34]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43160d3f3acsm1670155e9.0.2024.10.17.12.14.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Oct 2024 12:14:13 -0700 (PDT) Date: Thu, 17 Oct 2024 20:14:11 +0100 From: Pedro Falcato To: Jeff Xu Cc: Lorenzo Stoakes , akpm@linux-foundation.org, keescook@chromium.org, torvalds@linux-foundation.org, usama.anjum@collabora.com, corbet@lwn.net, Liam.Howlett@oracle.com, jeffxu@google.com, jorgelo@chromium.org, groeck@chromium.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, jannh@google.com, sroettger@google.com, linux-hardening@vger.kernel.org, willy@infradead.org, gregkh@linuxfoundation.org, deraadt@openbsd.org, surenb@google.com, merimus@google.com, rdunlap@infradead.org Subject: Re: [PATCH] munmap sealed memory cause memory to split (bug) Message-ID: References: <20241017022627.3112811-1-jeffxu@chromium.org> <3a1bbbdf-1281-4f44-857d-58cba583e3da@lucifer.local> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: CB069180015 X-Stat-Signature: tygpwwhyntudzhh39k7tfz1wyju3zk9g X-HE-Tag: 1729192445-126450 X-HE-Meta: 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 SWjQYPxe SP6efrLhPBfRYIp6YUrhBSNCbY717To9slZpWskVq90kOrIigjtRTGMcZh3fCQcLPJPFh6NSPVeuQ5Z1Zi0xMQqSPue5J6sZB4YkXci3VMZoCiDtzpIj3zHQWit02izJHvCYYrtsKShfaI9uZsf/r1k0Opvft4vz8K4m10Kk7unLjoDuvt+KYT1gqwZCLNSbpviCLE0vTJXdAZL97oe/yssJ8YP4uALpp3kmsd55KfEfG66/0FukbYwYS2mX/HHoWF+PHAST2b/T6Q/CjlR43omHPry1Oe+oZ7SiX6ILnp/xcs21sApooyYNpTN1wxb8bqmdVe9celLMDLIduD2tyuPXv1ZH1p2BA9JYNWF0YEyoRXktlV5H3P1YPiJllJSWY3zXiCKQ38T3V+D7M4JIAbqLb7ASr+kcsmMQpRgkVIl1R1ShF5p+sNVZcS0bswUzepPoT0Lk88EHWimyhqPykH9HFyTN5Uu49meLER2vPoVA14efT5kNqErRBlNbWYw6r4DUiTrxsUn119xM= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000027, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Oct 17, 2024 at 09:20:20AM -0700, Jeff Xu wrote: > On Thu, Oct 17, 2024 at 1:18 AM Lorenzo Stoakes > wrote: > > > > NACK. Greg's bot got to it but... > > > > As per Greg's bot, no signed-off-by line. > > > Sorry for confusion, I wasn't meant to send this as a PATCH, but > reporting the issue. > The diff was just sent as reference to repro the bug, and I forgot to > remove PATCH from the title. I apologize for the confusion. > Can you explain what the issue is? I don't get it. -- Pedro