From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gwu.lbox.cz (gwu.lbox.cz [62.245.111.132]) (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 B59314EBAE1 for ; Thu, 15 Oct 2026 09:15:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.245.111.132 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792055707; cv=none; b=XRbjlETroo7mo9SbIJl4wQmeWeka2ZvwPdiCfgU0Ihvxc8/AIk80+BddhAAysU9C6PQJbXTPNx6XB5IN5h43vNeK9FqWGBPvx0/BkATCQ42QqhifVQRadAxLQ/o1nbuHOmE2jo7+GonRXCqPfvOaOzo5JhciXzBRFJ93eKlp18U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792055707; c=relaxed/simple; bh=eQpDRHFZ3AEK6TRcOhxVRys8ayMj+mkL4cDbVlYOAPw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Ery6qxm22kSfMYX0dLHM5uJxMxVwM8HueC5GGBqvxFzVvt2MuSskLEp5i97MJ/VnsNHRIbnZCe/IustFQqlkEDY2i4Pvfhv1PtfTfdlZBKL7vnKsxeHKX7Ylb794s/LCsSy8cY3mckp+aKDzTpH2X88NFmDL8vQ87+ascyGjtBU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linuxbox.cz; spf=pass smtp.mailfrom=linuxbox.cz; dkim=pass (1024-bit key) header.d=linuxbox.cz header.i=@linuxbox.cz header.b=SbjwgFlr; arc=none smtp.client-ip=62.245.111.132 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linuxbox.cz Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linuxbox.cz Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxbox.cz header.i=@linuxbox.cz header.b="SbjwgFlr" Received: from linuxbox.linuxbox.cz (linuxbox.linuxbox.cz [10.76.66.10]) by gwu.lbox.cz (Sendmail) with ESMTPS id 69F9ETpt679695 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 15 Oct 2026 11:14:30 +0200 DKIM-Filter: OpenDKIM Filter v2.11.0 gwu.lbox.cz 69F9ETpt679695 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxbox.cz; s=default; t=1792055671; bh=McdUAvh5NY74wejVvsrsL2dv3zhZUPLBMc+Rqofd0fU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=SbjwgFlrB/HFvPgvt1Z37zZvYBJutnz5+Cj3SJVpRUyznUx+JPtLoUA6cbc87dFJM FRIl8p9AAB0st1WbEzg1xi6ENWl3FjaSnkGi1QPDIZKET+cyrrKkkS72KxZY4KHLPN dKOVbcM7xvb2wuabcn7zWrys9/gyikLO23YXMvpA= Received: from pcnci.linuxbox.cz (pcnci.linuxbox.cz [10.76.3.14]) by linuxbox.linuxbox.cz (Sendmail) with ESMTPS id 69F9ET7c003597 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 15 Oct 2026 11:14:29 +0200 Received: from pcnci.linuxbox.cz (localhost [127.0.0.1]) by pcnci.linuxbox.cz (8.18.1/8.15.2) with ESMTPS id 69F9ERRU2934612 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Thu, 15 Oct 2026 11:14:29 +0200 Date: Thu, 15 Oct 2026 11:14:27 +0200 From: Nikola Ciprich To: Borislav Petkov Cc: David Laight , Rik van Riel , ljs@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, david@kernel.org, Mike Rapoport , Dave Hansen , Pedro Falcato , Kiryl Shutsemau , luizcap@redhat.com, pbonzini@redhat.com, Tal Zussman , Matt Fleming , Nikola Ciprich Subject: Re: hunting memory corruption bug in 6.18.x Message-ID: References: <20261005132113.43548696@pumpkin> <20261008182356.GBasffvDuTemTu1VUY@fat_crate.local> <20261009090042.39ba9c06@pumpkin> <20261014235736.GCatAW8GD0GlYumL4l@fat_crate.local> 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=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20261014235736.GCatAW8GD0GlYumL4l@fat_crate.local> X-Scanned-By: MIMEDefang 3.7.1 on 10.76.66.3 X-Scanned-By: MIMEDefang v3.7.1/SpamAssassin v4.000002 on lbxovapx9 (nik) X-Scanned-By: MIMEDefang 2.86 on 10.76.66.10 X-Antivirus: on lbxovapx9 by Antivirus X-Spam-Score: N/A (trusted relay) X-Milter-Copy-Status: O > Did it reproduce usually with this? yes, we got most of the problems (crashes / corrupted libraries) during / after VM migration, so it seems to be the best trigger so far > If not, keep hammering on it with the latest kernel. We might've fixed > whatever that was, along the way. :-( yup, it's still migrating, it's been another 3 days since upgrade to 7.3-rc7, another 107 cycles (of ~160 VMs, some of them pretty large), still no problem. it starts to look rock solid to me. > > And if so, that would be a damn nasty bisection to figure out what fixed it... > > So pls hammer on it as long as possible to see if it is really fixed or it is > simply harder to repro. it doesn't seem to affect users in any way, so I'll just keep it running and report if I get some issue BR nik > > Thx. > > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette > -- Ing. Nikola CIPRICH technický ředitel +420 591 166 214 +420 777 093 799 nikola.ciprich@linuxbox.cz www.linuxbox.cz