From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from james.kirk.hungrycats.org ([174.142.39.145]:46220 "EHLO james.kirk.hungrycats.org" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S934939AbcJHHCE (ORCPT ); Sat, 8 Oct 2016 03:02:04 -0400 Date: Sat, 8 Oct 2016 03:02:00 -0400 From: Zygo Blaxell To: linux-btrfs@vger.kernel.org Cc: Chris Mason Subject: Re: btrfs rare silent data corruption with kernel data leak (updated with some bisection results) Message-ID: <20161008070200.GU21290@hungrycats.org> References: <20160921045556.GN21290@hungrycats.org> <20161008061008.GT21290@hungrycats.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="1PHmS26pdpOR3Xc0" In-Reply-To: <20161008061008.GT21290@hungrycats.org> Sender: linux-btrfs-owner@vger.kernel.org List-ID: --1PHmS26pdpOR3Xc0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sat, Oct 08, 2016 at 02:10:08AM -0400, Zygo Blaxell wrote: [...] > The "write half" of the bug seems to appear first somewhere between v3.8 > and v3.9. I have not been able to reproduce it with v3.8.13, v3.7.10, or > v3.6.11. I can reproduce it in v3.9.11, v3.12.64, and v3.18.13..v4.7.5. After six more iterations of the 'repro' script, I can reproduce "write half" on 3.8.13. Bisection is hard. Bisecting ancient bugs even more so. --1PHmS26pdpOR3Xc0 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlf4megACgkQgfmLGlazG5zXLwCdGeW72AL2S4Vsso38HrxNmRt9 MasAn39mL+TT3CXUiiT8A+HFJTHxx9Ww =6Sr+ -----END PGP SIGNATURE----- --1PHmS26pdpOR3Xc0--