From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932796AbaFCPMD (ORCPT ); Tue, 3 Jun 2014 11:12:03 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:57821 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932080AbaFCPMB (ORCPT ); Tue, 3 Jun 2014 11:12:01 -0400 Date: Tue, 3 Jun 2014 17:11:47 +0200 From: Peter Zijlstra To: Jason Baron Cc: Sasha Levin , Ingo Molnar , "acme@ghostprotocols.net" , LKML , Thomas Gleixner , Dave Jones , "edumazet@google.com" , "viro@zeniv.linux.org.uk" Subject: Re: eventpoll __list_del_entry corruption Message-ID: <20140603151147.GX30445@twins.programming.kicks-ass.net> References: <5370EBE9.6@oracle.com> <20140515181102.GH11096@twins.programming.kicks-ass.net> <538DE49F.7040904@akamai.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="HoX+cWnpt0BNB0oo" Content-Disposition: inline In-Reply-To: <538DE49F.7040904@akamai.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --HoX+cWnpt0BNB0oo Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jun 03, 2014 at 11:07:11AM -0400, Jason Baron wrote: > Hi Peter, >=20 > If its possible to reproduce maybe we can apply the following debug I think I saw it twice during a week of fuzzing, so it might be a while, esp. since I'm now not actively fuzzing anymore, but I can sure stuff this in my tmp/trinity branch just in case. Sasha and Dave might also want to carry it for a while, since they're doing far more of this than me. > patch to at least have a clue about which wait queue has gotten > corrupted. The bug could also be isolated to the epoll core too (ie > not specific to a particular wait queue), but I think its worth a > shot... >=20 > Thanks, >=20 > -Jason --HoX+cWnpt0BNB0oo Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJTjeWzAAoJEHZH4aRLwOS6Y5UQAI3Sl/wBOGi0ZXCIsclDnNQw JSz91OFXRKyR/0pR/Ow8KyfFBW6q+US49x6elBAopPvg4z+wsOoATcMIH5pz3Ta0 q2RRCpu5NowEeiCEpTqHB2GU0rqEACDBOQUVbmsqGNtuzl878I+a7k1GOyP5v4/d KIyFUmPYl/HjQ0hBCAwrTaOkKJ3DXxHnnuBSEKlg8BzLivjmP2tAqup1z7sQS1QH ApFWuUyC+rW9nro/EOJA4B1kUbInSqaRWC0bthQi08aE+P8eHeCXVtW4vgOuz8mm OfCbsVmgaOjfTPmLb206KFipDTdJCpyCi0ylv65qhFNpGtci2eu78Ep9COlSbXty bA8mTVgJirqRGN4+2wu88ZejEzMRxLNxSPZaQLp7p4WaluDP6771TsOFDpVuzPzQ 9jzWZni9FOiKor+ePcxOV7k/IpoU28nQc4TEQ0XjgpEyN5vLddJ2jYzGbYviPJf2 ghbgQgwXt7NYHzTPOaQneq3wX0Sjyqlmykler/i0ZzTHbt47TmPeAX5LTw2De7p4 PrfClsmLknq4gN9nHwV++nZHmsYhdE4C0PMLobpdN4/vho9KFQyeHkfHj62O4k1F 0UmFEJjIRWXMANJYvcvrxTIUH36sSCeidqWmleKq6TBIaQRUCZOJZHNt6XcuL42k r1Ti0E5+2iMmTOPGBcMb =QFWI -----END PGP SIGNATURE----- --HoX+cWnpt0BNB0oo--