From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2E918189513 for ; Fri, 30 May 2025 18:51:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748631083; cv=none; b=dY3G3K3UgGzAScjQqiON8DF9ksULl5DsqmRN6eoNEyMZzljSsMASTsmSNQs4TFY+j2qjVgIfbH9IEU9g9nW7ze9N+zcHuXGpo35z3eAqGPHxNwvp2FYs+f+zVftwv17xHH611/gxb9LmKw4cc8F54YjGW7rw46rOrKRxDCMgLA8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748631083; c=relaxed/simple; bh=eVV9xeVeiv2yXILMXk2UmpohCzZ0JzvHyAW4iBGaRic=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=PCs5Aj1Fiwp4NW+gtHckeKdW2vyleCTxoJThRIHRwWeP4FV8CMF5htIWGXfZ9EKRR6RBlFs/DSEvufBjU/d7/QgnvDqgdFOZbkrWnN0j0GyQmr3rYP9yKJLwV1ZZ2iGCr1fzwJlFO7j7GyGZUWQKpzx7wqkNTsfOKqmg0oZ+hk8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=WI+8oGVE; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="WI+8oGVE" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1748631078; 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:autocrypt:autocrypt; bh=YJzGuOEyCD92yoey5UJsZHsZc4atn6WQPDIRCxciOwU=; b=WI+8oGVE0Huc1UWq8k+SsL70W0axn6rFBZHqlrnca+W6tP8T+6qyWtG6bP2TBMQeCC6D1a DDIgWljYWyfdNQJjNkiUiA8zda9bipfTI2rpQwSFlj0Mh8QWOm2tt3orjxae9Kh+/NQlDH aLzVfrzUwiV2p81mDjlW2sT308H/2D0= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-460-NgCk06kyOiicY7k0BuQa3w-1; Fri, 30 May 2025 14:51:17 -0400 X-MC-Unique: NgCk06kyOiicY7k0BuQa3w-1 X-Mimecast-MFC-AGG-ID: NgCk06kyOiicY7k0BuQa3w_1748631076 Received: by mail-wr1-f69.google.com with SMTP id ffacd0b85a97d-3a4eec544c6so1071210f8f.0 for ; Fri, 30 May 2025 11:51:17 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748631076; x=1749235876; h=content-transfer-encoding:in-reply-to:organization:autocrypt :content-language:from:references:cc:to:subject:user-agent :mime-version:date:message-id:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=YJzGuOEyCD92yoey5UJsZHsZc4atn6WQPDIRCxciOwU=; b=KAJ8Bsm9+Fws3KSm6SrxADvjbWxzn5noA8CxZgo3NLumIuNmBCjXzV15tchJOFezPP J+cemErRSY5i6Sfdlmn6RHLvmLNy+x+G4McIAarRZXcYt5v7IaEQo0QImwGcjYK1BjYk 1lNeudlyq1oSzwQBVplAih5kKLn8v5qmwSzOLaN9x3jpB1d/0I/Koa/MeFxRA+ajLr7v 1GUH48U6vgDYC0xsIan5xri3X0nwoNtODKpIs5h082iWTjc6ibC83xEqAyUhL7Jv9zHw RV3EwtJ4X5OVo6zGS9mZjxw2GdswW6qCbulj9ddXtI+HZmzXECF4m5ey+g81fxGQVt// Dgjw== X-Forwarded-Encrypted: i=1; AJvYcCUXY9E/1UAbLQQcehow4e4Ym8Irqcut+VFmpzR1NAePErF0WP8h4ZTIEn+7VboHCrjbH53wtUI=@vger.kernel.org X-Gm-Message-State: AOJu0Yy4hFcJjf5mFNrSh0HtfVIyzQjc1xVpEWqMFXPL0VKKZx8RIcGz GFOm307zCcCDUOZSL4HOBuh3OAPZpyrXhOBANkgz4nDg6LS44Ufl516SJncIRP6R0b1MbONFb6o AIQYWK3h0aaEKMrbGyaBML8nbY3Wy49LR6ipzs05AYjqtKxeTNB80mV/Ugw== X-Gm-Gg: ASbGncvco9otF215UnoSzB9+EyfLyln5YiCOjUqw2KhDnfYYtds/GfzTBVxeH022s33 WbNpv4SjVUZUsphUOfWt0G0Wv1H4X6cGIE62jgFe6JJsAhNBgnwDCwNjaAItTGv3FM6iEuigPwr PhwU5GEFlkazVV3O+RxyTQwGmf6ToiPYH0LDTlW79+6jZOsjyeIv21FA+wVHRWMhPFH6PCkX1wu p0rLNMZ00/mlgaZg1aWqSNaR9LxiLGcag7zGMmFBu0A3T2vBgib3Nbyyn5OWLhByKJrW782KrO7 n5cJMtZvKpo4FERLX5QFa1hIJ31hEjticvMjPb7BJzC53AgpXkLfBIGZun/u6Nm3h3Dek+xg1Ga Z+DSgevicTFILv1tvsOZXUtasgDRHUfXfA6AlrtA= X-Received: by 2002:a05:6000:18ab:b0:3a4:ea40:4d3f with SMTP id ffacd0b85a97d-3a4f7aafa70mr4212776f8f.53.1748631076242; Fri, 30 May 2025 11:51:16 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEXz9jboLNudDIoWr1Y0bfqfhAVm5ux5WqC9fB4zaCC4yD21pmClOISusCFn1KSYiqhpVoOfg== X-Received: by 2002:a05:6000:18ab:b0:3a4:ea40:4d3f with SMTP id ffacd0b85a97d-3a4f7aafa70mr4212755f8f.53.1748631075852; Fri, 30 May 2025 11:51:15 -0700 (PDT) Received: from ?IPV6:2003:d8:2f03:5b00:f549:a879:b2d3:73ee? (p200300d82f035b00f549a879b2d373ee.dip0.t-ipconnect.de. [2003:d8:2f03:5b00:f549:a879:b2d3:73ee]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a4efe5b8besm5586306f8f.16.2025.05.30.11.51.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 30 May 2025 11:51:15 -0700 (PDT) Message-ID: <962c6be7-e37a-4990-8952-bf8b17f6467d@redhat.com> Date: Fri, 30 May 2025 20:51:14 +0200 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 1/4] mm: Fix uprobe pte be overwritten when expanding vma To: Pu Lehui , mhiramat@kernel.org, oleg@redhat.com, peterz@infradead.org, akpm@linux-foundation.org, Liam.Howlett@oracle.com, lorenzo.stoakes@oracle.com, vbabka@suse.cz, jannh@google.com, pfalcato@suse.de Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, pulehui@huawei.com References: <20250529155650.4017699-1-pulehui@huaweicloud.com> <20250529155650.4017699-2-pulehui@huaweicloud.com> From: David Hildenbrand Content-Language: en-US Autocrypt: addr=david@redhat.com; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20250529155650.4017699-2-pulehui@huaweicloud.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit > > if (vp->remove) { > @@ -1823,6 +1829,14 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, > faulted_in_anon_vma = false; > } > > + /* > + * If the VMA we are copying might contain a uprobe PTE, ensure > + * that we do not establish one upon merge. Otherwise, when mremap() > + * moves page tables, it will orphan the newly created PTE. > + */ > + if (vma->vm_file) > + vmg.skip_vma_uprobe = true; > + Assuming we extend the VMA on the way (not merge), would we handle that properly? Or is that not possible on this code path or already broken either way? -- Cheers, David / dhildenb