From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ted Zlatanov Newsgroups: gmane.emacs.bugs Subject: bug#10904: 24.0.93; Infinite loop in GnuTLS code during Gnus nnimap-initiated SSL handshake Date: Tue, 10 Apr 2012 07:54:01 -0400 Organization: =?UTF-8?Q?=D0=A2=D0=B5=D0=BE=D0=B4=D0=BE=D1=80_?= =?UTF-8?Q?=D0=97=D0=BB=D0=B0=D1=82=D0=B0=D0=BD=D0=BE=D0=B2?= @ Cienfuegos Message-ID: <8762d7kdk6.fsf@lifelogs.com> References: <87haxk3dce.fsf@lifelogs.com> <87hax6wakn.fsf@lifelogs.com> <87sjgdoi43.fsf@lifelogs.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1334058912 28521 80.91.229.3 (10 Apr 2012 11:55:12 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 10 Apr 2012 11:55:12 +0000 (UTC) Cc: Lars Magne Ingebrigtsen , 10904@debbugs.gnu.org To: Thomas Fitzsimmons Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Apr 10 13:55:11 2012 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1SHZfD-0003SE-5f for geb-bug-gnu-emacs@m.gmane.org; Tue, 10 Apr 2012 13:55:11 +0200 Original-Received: from localhost ([::1]:55688 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SHZfC-0002AF-Kp for geb-bug-gnu-emacs@m.gmane.org; Tue, 10 Apr 2012 07:55:10 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:55502) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SHZf9-00027c-BQ for bug-gnu-emacs@gnu.org; Tue, 10 Apr 2012 07:55:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SHZf4-000687-67 for bug-gnu-emacs@gnu.org; Tue, 10 Apr 2012 07:55:06 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:51624) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SHZf4-000656-2d for bug-gnu-emacs@gnu.org; Tue, 10 Apr 2012 07:55:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1SHZg2-0006KJ-5W for bug-gnu-emacs@gnu.org; Tue, 10 Apr 2012 07:56:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Ted Zlatanov Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 10 Apr 2012 11:56:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 10904 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 10904-submit@debbugs.gnu.org id=B10904.133405890924197 (code B ref 10904); Tue, 10 Apr 2012 11:56:02 +0000 Original-Received: (at 10904) by debbugs.gnu.org; 10 Apr 2012 11:55:09 +0000 Original-Received: from localhost ([127.0.0.1]:48162 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1SHZfA-0006ID-MG for submit@debbugs.gnu.org; Tue, 10 Apr 2012 07:55:08 -0400 Original-Received: from z.lifelogs.com ([173.255.230.239]:34945) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1SHZf7-0006I4-8u for 10904@debbugs.gnu.org; Tue, 10 Apr 2012 07:55:06 -0400 Original-Received: from heechee (c-76-28-40-19.hsd1.vt.comcast.net [76.28.40.19]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: tzz) by z.lifelogs.com (Postfix) with ESMTPSA id 147C4205FC; Tue, 10 Apr 2012 11:54:02 +0000 (UTC) X-Face: bd.DQ~'29fIs`T_%O%C\g%6jW)yi[zuz6; d4V0`@y-~$#3P_Ng{@m+e4o<4P'#(_GJQ%TT= D}[Ep*b!\e,fBZ'j_+#"Ps?s2!4H2-Y"sx" Mail-Copies-To: never Gmane-Reply-To-List: yes In-Reply-To: (Thomas Fitzsimmons's message of "Mon, 09 Apr 2012 23:07:34 -0400") User-Agent: Gnus/5.130004 (Ma Gnus v0.4) Emacs/24.0.95 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:58688 Archived-At: On Mon, 09 Apr 2012 23:07:34 -0400 Thomas Fitzsimmons wrote: TF> I tried trunk against my IMAP server and the applied patch prevents the TF> infinite loop. At the default gnutls-log-level, a connection attempt TF> fails with: TF> Warning: Opening nnimap server on ...failed: ; Unable to open server nnimap+ due to: GnuTLS error: #, -9 TF> gnutls.c: [0] (Emacs) fatal error: The specified session has been invalidated for some reason. Wonderful. TF> A nice improvement would be to detect when the server uses a ciphersuite TF> that GnuTLS's default priority list ("NORMAL") rejects, warn the user, TF> and ask if they want to retry with a more permissive list TF> ("PERFORMANCE"). But that's a separate enhancement -- for now your TF> patch fixes the infinite loop and setting gnutls-algorithm-priority to TF> "performance" works around the server's weak ciphersuite. I plan to follow Nikos' advice here: http://permalink.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/6017 so we'll drop from NORMAL to PERFORMANCE, basically, if the user approves. After the 24.1 release I'll look at this. Ted