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 4F5394432FD for ; Mon, 5 Oct 2026 09:31:35 +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=1791192699; cv=none; b=Q1vmQEXumYotaDjXgxwpxO0JFcL8+iWjESDXylOHxzUdOnDUxL708OlWsMK6cU/2mAcul4NmvPxcXKiNH7Akxg41tYSZiT4m3MyF/4L5X5+bcuNnVl5lEqFcqsvBGk2sZD0w2jcp4QRTEgY5RdHrkLwkz291RhaLlfVBRi4z9Fk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791192699; c=relaxed/simple; bh=4dK1t9/7nUmp2dPlKwWv6j487aRsbkMk3Td44bvTXuA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=b1NJRopOt5/MEaozjp97PiwVq15OqW15U3izaewufTOJ94iHu4GbR6MCSNNwIKSQTnBLRrjs6g/pb0fP0NXFePUPw6t7eBRnvMGFJSbPZNkrjY6ga58msKK1yV4AryrpbCpuY+jXiTR7Rv04H97tcFIcbg0Yg+ttBKPEkU2YAHs= 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=4sE8ky3G; 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="4sE8ky3G" Received: from linuxbox.linuxbox.cz (linuxbox.linuxbox.cz [10.76.66.10]) by gwu.lbox.cz (Sendmail) with ESMTPS id 6959VFPh4139732 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 5 Oct 2026 11:31:15 +0200 DKIM-Filter: OpenDKIM Filter v2.11.0 gwu.lbox.cz 6959VFPh4139732 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxbox.cz; s=default; t=1791192676; bh=BBrWUUXSCL9gFn2uxP6KDGd2JEbEkHet4WqBH6N7+cY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=4sE8ky3GOzfgE9kpii4L2Xy7yl3Zikrlo4fNKWxq5s7V9ucCj++gMHfHbqn9VdBv1 YbPtF0QGA9G7noXmv2CTHzdHcotaZqpi6HI7eoeFz0PPOuGLkvQXQyjeePbeoQGqrS 6mFKXe/j7ZxL98FmttFEoLqvRLedCZD2HqY6l1q0= Received: from pcnci.linuxbox.cz (pcnci.linuxbox.cz [10.76.3.14]) by linuxbox.linuxbox.cz (Sendmail) with ESMTPS id 6959VElD045326 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 5 Oct 2026 11:31:15 +0200 Received: from pcnci.linuxbox.cz (localhost [127.0.0.1]) by pcnci.linuxbox.cz (8.18.1/8.15.2) with ESMTPS id 6959VDSw2367544 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Mon, 5 Oct 2026 11:31:14 +0200 Date: Mon, 5 Oct 2026 11:31:13 +0200 From: Nikola Ciprich To: Rik van Riel Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, Nikola Ciprich Subject: Re: hunting memory corruption bug in 6.18.x Message-ID: References: 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: 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 > THP has a recent patch that may be relevant: > > https://lore.kernel.org/all/20260903031608.1194238-1-vernon2gm@gmail.com/ this one got to 6.18.53 which also crashed for us (this was the last crash, from which I have complete vmcore), so we're most probably hunting another bug. > > > As a safety measure, we've disabled THP and NUMA balancing on all > > hosts. > > Does the issue still happen with THP and NUMA balancing disabled? we've disabled numa balancing on all suspected machines, but there was some confusion with diabling THP, so I don't want to bring some confusion here.. let's rather assume it was NOT disabled. -- Ing. Nikola CIPRICH technický ředitel +420 591 166 214 +420 777 093 799 nikola.ciprich@linuxbox.cz www.linuxbox.cz