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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 97DE5C5AC7C for ; Fri, 7 Aug 2026 11:21:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 71DF96B007B; Fri, 7 Aug 2026 07:21:02 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6CDFE6B0088; Fri, 7 Aug 2026 07:21:02 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5BCE76B008A; Fri, 7 Aug 2026 07:21:02 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 366996B007B for ; Fri, 7 Aug 2026 07:21:02 -0400 (EDT) Received: from smtpin27.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 54DDCA02E4 for ; Fri, 7 Aug 2026 11:21:01 +0000 (UTC) X-FDA: 85074231522.27.78A3A68 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf11.hostedemail.com (Postfix) with ESMTP id 9B95240004 for ; Fri, 7 Aug 2026 11:20:59 +0000 (UTC) Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=Ck1IoYB7; spf=pass (imf11.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1786101659; 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=28qz/dUeEuMa/LegNdxWkBMpO+s+o8La8w1U9SPiDTY=; b=dPpBe75dg6Qu68w9s82E/YGY/fEhuptEEOYq1LUnv5Gc+cYZ168Zcu4zkyjlacyDEHCf2F ClTNRGe1wQjOrNBNmsE2Rsc10XmI6g9lnOtin4YMLOUcFELYuzco5X56O2f8UFohbhGW5v 9l1G15yI30RBPQEheCyMdcduWGFmBhw= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1786101659; b=sIaVXQ5d7/KqgH7Ybcn7qRcnMz6yDQqiUQrppihZaNMQZ453dqPIF8E00HqXi9BctIRqT8 hrgKf1sdOgxIFv37ksVeLw9e9s8AykXRaFipGO25kwO2bwzp3lWOCK080gUfUupP1bS3rt RttsedqqEnx5nQKmWSD3IlJ+vi8UiX8= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=Ck1IoYB7; spf=pass (imf11.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 7AE7B60A64; Fri, 7 Aug 2026 11:20:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7E76E1F000E9; Fri, 7 Aug 2026 11:20:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786101658; bh=28qz/dUeEuMa/LegNdxWkBMpO+s+o8La8w1U9SPiDTY=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=Ck1IoYB71PYbDCcGhRP+9VSnjMyDX6NPy4PGhIz8HgI1w3MXCt4bUydo+tM4ha69S hTohIh0tkJ8C2Ckqs2iYtOnLm7s03morxLToW2mIsbcYYEZsOhUqKCo0/8AUY2tJp5 1aanz+9KgvBtXBUytnQ5cbAgOrb1BPZrfBTX2OdqJ7/qQVqoeu+Os4rdecU3QzpYXJ 5FB34JIHJbvHjZpLWAk5okHhLrCFSN6AXm/BGVGUuWI+1VSLstbyF5zAHl0YXrEVs9 NBnXhE1xoqK/PD20t7Z8a0lsIYrGpYLmpNofpWS2WFYJuCm7x8GsiQNSSyBoqfHu+3 c4UnXQqxDEb/Q== Message-ID: Date: Fri, 7 Aug 2026 13:20:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] fork: reset pointer tag of vmapped thread stack before vfree To: sparkhuang Cc: akpm@linux-foundation.org, bsegall@google.com, dietmar.eggemann@arm.com, juri.lelli@redhat.com, kees@kernel.org, kprateek.nayak@amd.com, liam@infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, mgorman@suse.de, mhocko@suse.com, mingo@redhat.com, peterz@infradead.org, rostedt@goodmis.org, rppt@kernel.org, ryabinin.a.a@gmail.com, stable@vger.kernel.org, surenb@google.com, vbabka@kernel.org, vincent.guittot@linaro.org, vschneid@redhat.com References: <20260807104153.94261-1-huangshaobo3@xiaomi.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20260807104153.94261-1-huangshaobo3@xiaomi.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam07 X-Rspam-User: X-Stat-Signature: ktzbab539nh83rgh68tbdjwfj1q4fa8y X-Rspamd-Queue-Id: 9B95240004 X-HE-Tag: 1786101659-869056 X-HE-Meta: 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 nEMJZV9v lVjKvYxeGlIkP9kqDFmryvXVKZ0GOAP6Lnw2JPzDIJx79ZDBQ2uWJbI1tYqwOXwnzJwVp5Rj47ruKbaIwo8rS+mM0mtKA5UbXFY3a4O3ITiNvgolT1ZGxDywR+WIZHYHtbnU5H0akJJXjiTkP7uSMy7B+7nLII/74AE/F+CoTYBeQ1o53IuQW94Uc7dVJeL5J5H90+NvO89/yEFrVXwmoVP2z8lWI3k7FYwHsNTAPT4P3hHxVN5KDDyR7WCtYwb22r6XSuB8OaNKPz51nIHk/Mwtr4iLbeCWnretz0CRlpjV43YZhJ4XGEzYxBSDsdRWZmz062x3GUYWqzE4= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/7/26 12:41, sparkhuang wrote: > On 2026-08-07 9:27 UTC, David wrote: >> Were you able to reproduce this more than once? > > Still trying to reproduce it. So far it has only occurred this once. Oh, and if it is about CONFIG_KASAN_STACK, I think you need a very deep stack to set all the tags -- IIUC. Maybe that's what would trigger it easier. -- Cheers, David