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 D4160C25B4F for ; Mon, 6 May 2024 16:30:41 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 56DB46B009D; Mon, 6 May 2024 12:30:41 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4F6F96B009F; Mon, 6 May 2024 12:30:41 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 397376B00A0; Mon, 6 May 2024 12:30:41 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 1AFDD6B009D for ; Mon, 6 May 2024 12:30:41 -0400 (EDT) Received: from smtpin07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 9E699A0F74 for ; Mon, 6 May 2024 16:30:40 +0000 (UTC) X-FDA: 82088509440.07.55A3215 Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) by imf09.hostedemail.com (Postfix) with ESMTP id BE00014002A for ; Mon, 6 May 2024 16:30:38 +0000 (UTC) Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=RnY8+Wyz; spf=pass (imf09.hostedemail.com: domain of keescook@chromium.org designates 209.85.214.172 as permitted sender) smtp.mailfrom=keescook@chromium.org; dmarc=pass (policy=none) header.from=chromium.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1715013038; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=5nO/jBC7SnINVskvlvpi2Kyipwpsb5dE+lwh2d00uCo=; b=0rr2y6DmlzKhJN/5rDOf2r8EoToKrQuougrg0tHCiPArs41Taa2cxpbYlMNk8KZs7hwUmd xt9sOWj3BXX7X2ta82BO/XM70gD5AfBtArnBM2k4peHSK/IsHSX4JknaO7h+/F2ZGWuflt mNELbsrX99cljxZxvTYPze+wORO4ZdE= ARC-Authentication-Results: i=1; imf09.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=RnY8+Wyz; spf=pass (imf09.hostedemail.com: domain of keescook@chromium.org designates 209.85.214.172 as permitted sender) smtp.mailfrom=keescook@chromium.org; dmarc=pass (policy=none) header.from=chromium.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1715013038; a=rsa-sha256; cv=none; b=iV/7zfBykd6gIe3siPXTcQThHVkQQ4T4RgwyjCkyiKg/r8yFqYyeNJy6ZuxqTHipcQbjt2 QHcQ0adykjm35MK5IHKXhrLvyIiOZVo10izxl5O+DYO5p3axD4yiqLm5YK7h+YQgI3yUKu 0I0H8ngrtLcayCFHRtXz6HxwEsBIrjM= Received: by mail-pl1-f172.google.com with SMTP id d9443c01a7336-1e4c4fb6af3so11963855ad.0 for ; Mon, 06 May 2024 09:30:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1715013037; x=1715617837; darn=kvack.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=5nO/jBC7SnINVskvlvpi2Kyipwpsb5dE+lwh2d00uCo=; b=RnY8+WyzxYtgM/jBaJmPSqKi+Feu0avzeRg/23T0eoNKiUiknI7mYiXgQ3jIBR3tGU X7O0KxI2iQuC7o9AgmvuLl+n9ZgqENy/CFyyu2iFUjXsgIT3bDoIWy5BwrJfhwK3wwQ1 DR1kTpKlI1pb6ai28CyUTms1dwmFLH5tkYQ78= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1715013037; x=1715617837; h=in-reply-to: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=5nO/jBC7SnINVskvlvpi2Kyipwpsb5dE+lwh2d00uCo=; b=FwdIsWktT/tD72hBLJ/vTzTrR8HP/b+BZZlTjtYXark3HwkF0sYVBe5GLsMKDxKQiU FvndnZo1MNiPkHv2qiI0v6fl24613ZnJUr0dBbHlK2juPH/Z7YVxyDu3lLTy0JqSXkNN iLHutGKIIoCruypHinOCUScLOzZJcIkZML9W0GIy4cGKiT3Hm4NtZKt7KbYIOZwyZuuV w0X21hxiRw/KyvsfRU24My8D9uyWz2trn8/9Q26LJ1Ssyj7w+f2GDMM1WMFJO2Xbm/TV XC2UOOc64VNJujBZsm299hbdEdZDqJyCsLrziv7ewpWM7dcqgJJihPUaKvjGAFs3bos4 D1vA== X-Forwarded-Encrypted: i=1; AJvYcCXDhIENXtmwkZwS6zF/v8cztH5jqjk6cz5BpJb5n1GOwSCoyN4hVD3KMJ44aNUDuB1DuAPaQKI7pc8CKC0eOFP7PPw= X-Gm-Message-State: AOJu0Yy3dLTbsrdjps6ivKULY5FwA1T4GdsCgYnqRqbnhmd4hQ0m5xNA 00gINpK3SjmB2F1gUu7r87VIMKyCR+3CUBk7A8YnEliiKbNUGlDzp6AZv03hNA== X-Google-Smtp-Source: AGHT+IFcP+Jvqd/2a6pLKHSMXDBGF+KAP9XwchiHK23udF18xnHUuv2vvHD/KwYZxvsIqAr/6p7pIw== X-Received: by 2002:a17:903:1c3:b0:1e0:b60f:5de3 with SMTP id e3-20020a17090301c300b001e0b60f5de3mr244611plh.7.1715013037261; Mon, 06 May 2024 09:30:37 -0700 (PDT) Received: from www.outflux.net ([198.0.35.241]) by smtp.gmail.com with ESMTPSA id a14-20020a170902ecce00b001e41e968a61sm8414660plh.223.2024.05.06.09.30.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 May 2024 09:30:36 -0700 (PDT) Date: Mon, 6 May 2024 09:30:36 -0700 From: Kees Cook To: Oscar Salvador Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Michal Hocko , Vlastimil Babka , Marco Elver , Andrey Konovalov , Alexander Potapenko , Alexandre Ghiti , syzbot+41bbfdb8d41003d12c0f@syzkaller.appspotmail.com Subject: Re: [PATCH v4 2/4] mm,page_owner: Fix refcount imbalance Message-ID: <202405060930.67CDA64@keescook> References: <20240404070702.2744-1-osalvador@suse.de> <20240404070702.2744-3-osalvador@suse.de> <202405060754.4405F8402F@keescook> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Queue-Id: BE00014002A X-Rspamd-Server: rspam06 X-Stat-Signature: twofk4ne6rbem1bcy7d54g57z41wst9x X-HE-Tag: 1715013038-224302 X-HE-Meta: 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 1lqI7nfq 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.036728, 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 Mon, May 06, 2024 at 05:41:28PM +0200, Oscar Salvador wrote: > Yes, but I wanted to get the handle so I can match it with the > backtrace. Ah! Yes, that makes sense. Thanks! -- Kees Cook