From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) (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 871DE38F95B for ; Sat, 10 Oct 2026 23:54:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=18.9.28.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791676493; cv=none; b=qc5a2cosbxguOyyaBxgiXDjbNEyUsZhjJ6eUFUHCYbpr/RqfvuwMapz5U6aRf7g45VLujtfzDQcf8Oe/BKyqInBGqi/dIKO3hsGrI/ZDBn96kAo1dCCn0vUdIUKD6cxjqXtqCDs4xTJQV6L4K9nNYE9NIN0LlW/JUMPFWeoOlEc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791676493; c=relaxed/simple; bh=lLtabEDEGxAL/BzvBgmfjZNheScSv38qKOCUUBaLOss=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=LsLiu+5cAHlMmVAk9I1eNheLkBGXNuNuDb25tyelsN//CINJOC/3MtsO4V/R3uzUgLEkca0L9sS6SFpIzt998fO1negdst8cNleHAat5bnJzhW+8EOx6yRm6Cp80vgtMaa4AzGmVzfqxf3OjDtNMbjJRIEBqrHt/AR6JuEq2a90= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mit.edu; spf=pass smtp.mailfrom=mit.edu; dkim=pass (2048-bit key) header.d=mit.edu header.i=@mit.edu header.b=gQRHIT2l; arc=none smtp.client-ip=18.9.28.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mit.edu Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mit.edu Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mit.edu header.i=@mit.edu header.b="gQRHIT2l" Received: from macsyma.thunk.org (pool-173-48-111-204.bstnma.fios.verizon.net [173.48.111.204]) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 69ANsEpK023589 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 10 Oct 2026 19:54:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mit.edu; s=outgoing; t=1791676458; bh=eMDw1C/diPMVZVZb/XGNTeaHo/sKKU3IqDRt++QQmts=; h=Date:From:Subject:Message-ID:MIME-Version:Content-Type; b=gQRHIT2lmmMIlzdRzeOKdVg2gg3y9q1zquDOJ3bQzh4/srAaNC+1/81KO2hL1kabC /MUrqldHiMkTQk+rNbNKEbPCof8GC3AQjnuHDHvFwJeXOY3PnM70/0WxkmF/BTTZ3w SEyUMVJdUkuxv7k/Lo7Q8RsUXGyJq0o/DSn6ea7X6OvFW/LKYZOBiQvkN3ZNmzsf+K 3yFp9dvo40rnxXhjHSPrEtSSKyk2debMHaLVKWaDlEv9eZZv5k89PGcfBvIJYfBAO5 wbXeKC4ncKlri4Lm0/mzZGe4sJug7QPPFoE+Z83sfRvasQxlvaMlPXUFxNhJtbVOFF L8HofkhzP3ngw== Received: by macsyma.thunk.org (Postfix, from userid 15806) id 8D8A81FCDFA2; Sat, 10 Oct 2026 19:53:14 -0400 (EDT) Date: Sat, 10 Oct 2026 19:53:14 -0400 From: "Theodore Tso" To: Artem Dinaburg Cc: stable@vger.kernel.org, Greg Kroah-Hartman , Sasha Levin , Max Kellermann , Zhang Yi , Jan Kara , Jan Kara , linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 6.6.y 0/2] jbd2: backport CVE-2026-89566, CVE-2026-89567 Message-ID: References: <20261008192048.98833-1-artem@trailofbits.com> Precedence: bulk X-Mailing-List: linux-kernel@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: On Sat, Oct 10, 2026 at 06:12:10PM -0500, Artem Dinaburg wrote: > > Our initial unpatched/patched runs showed some differences in both > directions. We cannot yet attribute those to the series, so we have > paused the patched comparison and are running three complete > iterations on the same unpatched baseline to assess repeatability. Note that some tests can be flaky. So when you see a test failure, it can be useful to run a test multiple times, so you can see if the test is a reliable hard failure, or one that only fails, say, 30% of the time. So to run generic/363 10 times in the ext4/1k configuration, you might do soemthing like this: kvm-xfstests -c ext4/1k generic/363 -C 10 - Ted