From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 07F071FC10C for ; Wed, 27 May 2026 01:31:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779845486; cv=none; b=hdgkCdia/uV5YxsXuG3XYcP5tTgz/oMGw6vPQISwaivOTfVeFmX8+msi7L7USqFHENIZozn5Kwkzh7lQoe1WQs6N/GOQw2HZ+W0emZONBIsd+7rYTu83dnDA338EOOcfMA2gJNglh2IL7TUV5AmDGNwVsku0UGD0cyUJ4pe+3tY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779845486; c=relaxed/simple; bh=hXXLUda/fifR+BteeAViVSobkEgeQFmGHS1PxB/A3hk=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=CErZAxS2MjEVsWgkI0p0Vzu0D6+47dLTqGmfzco0ENG6iavC/bmHngEtt+ZqVB/y7VgySrXZeyBeIhaWI2dZtLR206PPjJQvL/B55VAJsGFpTS2dw6eilkqed9I0DDGqf7xezpv67Ocne2u3AzENsTdCLTfTgLXlsJTo1hv4hkY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Fs1o9Ree; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Fs1o9Ree" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 327D81F000E9; Wed, 27 May 2026 01:31:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779845483; bh=q7hx76CuE1HlQQmJtkeIk43zXQJcWk5CXtiULiiQKsw=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=Fs1o9ReeM+23W4SOunQxrtc3lW9oAL+o9Xydj004t9utaysJCigLfkRFekklSUbih t6sNK0lGU83cya5gGBbNxHG+f/umJnhw0qW8mY/a+xzlM7oh34BzAC2Qbe7JvSBElk c1ynHeOWJKH4At1vSqXrvRgx31IOxJ1aEzrSW0PBJ/cRWu/ZTvh11E7aKP7mK/zmuB nOnLUUjd9bHKkNj460JeoLNH7xGOZfcVJzVwPg717Cem1EAJRxKVp/R+cpab63ujx+ V3WPiY5ayQcOvBkvIX+Voz8YU6l1vtAmDFbqCYgyMPEPFo2OBLTVQADQ1jI8ngxeX8 w5OEebfR0Knvg== Date: Tue, 26 May 2026 18:31:22 -0700 From: Jakub Kicinski To: Chris Adams Cc: netdev@vger.kernel.org, Yumei Huang , Fernando Fernandez Mancera , Ido Schimmel Subject: Re: Problem with IPv6 privacy addresses in 7.0 Message-ID: <20260526183122.348e44e7@kernel.org> In-Reply-To: <20260527010641.GA21073@cmadams.net> References: <20260521135310.GC977@cmadams.net> <20260526175743.1f2c3761@kernel.org> <20260527010641.GA21073@cmadams.net> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Tue, 26 May 2026 20:06:41 -0500 Chris Adams wrote: > > Hi! Adding more people to CC. Do you know if you upgraded from 6.18 > > or 6.19? > > It was 6.19 to 7.0. > > > Would you be able to try testing with some commits reverted? > > On a quick look the candidates would be: > > > > cb3de96eea66 ("ipv6: preserve insertion order for same-scope addresses") > > It's this one. Phew, the second one was mine :) > I figured out that it happens after stopping a VM (and I usually > start/stop a VM for a bit in the morning, which is why it happened more > than once). So I set up a VM with a nested VM, running up-to-date > Fedora 44, and then was able to bisect pretty easily, and it landed on > this commit. > > Fedora is using NetworkManager, and IIRC NM does some part of privacy > address management (right?). NM didn't change, so maybe this commit is > confusing something in NM? Sounds plausible, pretty sure we knew this commit was risky to begin with, but we had no direct proof that it'd break real life users. Revert is the right course of action here. Would you be willing/able to send the revert with your problem description and a Fixes tag pointing to the reverted commit?