From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [62.89.141.173]) (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 9F5311A9F91 for ; Fri, 10 Apr 2026 15:53:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.89.141.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775836400; cv=none; b=XlmOODTqaeo32lZi7ArLH/0p9beTDjVKkRGvhQtiForTEZKMacE4Z5kYbAFXq+RbFKb64OpTf5FO2vpDAp5CCiVeqftZu4x22yP0JdCZwboKwGHJEJucNhU3M2jdGLP9POELYQyqZEpwQCEuz5ZRw204AfFFvaNN/YkTdqlYwTs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775836400; c=relaxed/simple; bh=6fUbRn4DAzDNk+1O9rvZYSOGaXmIy4VNN1wwj+ZWJc8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=TWNnNS8L1BH5CioFknTt+VBevMoAC00FMDTA1FqmgEkpA5etIog6F0HyM+2cxiLl0yVkSTNraZEX8TL2CiJ8fRrM+4X1hIZkVurRDG5S6CKiofAHMQyqe9wHX+bRiZwEJ7EjMepS5kBfUDT64gcQN5XwbauhxlzjGdV1nG477As= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk; spf=none smtp.mailfrom=ftp.linux.org.uk; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b=HdaUj7cr; arc=none smtp.client-ip=62.89.141.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ftp.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="HdaUj7cr" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=WEWLvoNIdNjFYIOUVGfTzC9qQTlEyTIF00FptGvBYuU=; b=HdaUj7crxbsyn4pivgZCnoQClx tdZPkB5efuUeY0SfZoKjB1MvUtBZPxUQC4J7ZdVXMS7noxjNYRLuhyBIzrdCDQ1grSVrX9/6X2JdO G/DopehDrcSkQpAk7X1Tjj+REV4G8a5ppWe0eACpTXV8bLee7cQitgpwHWyRdhGJct7f1IcA8QuCz RrwT4DLOHS+e+PlZftgrtOYJrxw8g28/ZF4cHZ2AF38auk7eTn7RluQJzuXXfNH4kaX4U3ALPSYXe z83kMMbfAYOgocWTXOahfKmL6Ixapr6v//9+lfBVFZ/h0exJh0z+zEXYDXk5r4kwVKT+7tUB7rquf rWUFqS0Q==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.99.1 #2 (Red Hat Linux)) id 1wBEEA-00000006zyU-1fXr; Fri, 10 Apr 2026 15:57:02 +0000 Date: Fri, 10 Apr 2026 16:57:02 +0100 From: Al Viro To: Linus Torvalds Cc: "Paul E. McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Jeff Layton , linux-fsdevel@vger.kernel.org, Christian Brauner , Jan Kara , Nikolay Borisov , Max Kellermann , Eric Sandeen , Paulo Alcantara , Helge Deller Subject: Re: [RFC][PATCH] make sure that lock_for_kill() callers drop the locks in safe order Message-ID: <20260410155702.GT3836593@ZenIV> References: <20260122202025.GG3183987@ZenIV> <20260404080751.2526990-1-viro@zeniv.linux.org.uk> <53b4795292d1df2fe1569fc724325ab52fcab322.camel@kernel.org> <20260409190213.GQ3836593@ZenIV> <41cfd0f95b7fde411c0d59463dce979be89cb8ef.camel@kernel.org> <20260409215733.GS3836593@ZenIV> <20260410084839.GA1310153@ZenIV> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: Al Viro [belatedly Cc'ing Helge on this one] On Fri, Apr 10, 2026 at 08:25:27AM -0700, Linus Torvalds wrote: > [ Adding RCU maintainers to the participants: see > > https://lore.kernel.org/all/20260410084839.GA1310153@ZenIV/ FWIW, the thread starting at https://lore.kernel.org/all/adQO8B0rkR2ftusI@p100/ might also be relevant - another UAF report in the same area, this one with more(?) reliable reproducer, parisc-specific. > and the fairly long thread associated with it for context ]