Received: by 2002:ab2:69cc:0:b0:1f4:be93:e15a with SMTP id n12csp1871400lqp; Mon, 15 Apr 2024 23:21:43 -0700 (PDT) X-Forwarded-Encrypted: i=3; AJvYcCXff9+1DQxIyFqxUWOXjcsR3Z1/HszxixV6i8JyeSmcxHuk0OVtmTK7YCQIGpdOoyVDoHfCU/dZ+JkVCFnkFvqcZzFALtssvn6+7sZ9cQ== X-Google-Smtp-Source: AGHT+IFs/LgT3DW5HYXTq2KMn3l4CYwRFMwIjk4qMJXr8JL2sEX+Qu/qaClXKqKXmID3hWh4MU7n X-Received: by 2002:a05:6a20:3cab:b0:1a9:694b:cfbd with SMTP id b43-20020a056a203cab00b001a9694bcfbdmr11526445pzj.5.1713248502706; Mon, 15 Apr 2024 23:21:42 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1713248502; cv=pass; d=google.com; s=arc-20160816; b=g76zeNvYR9AEE+spo48vywqwaK/j+jPSrKQ8vwcftaWy17a6W6WQUw/+jCY6Y+cbTh vC4Jcoyl+rz201whjwfKl7045SKFHaaTFZMAJe1iGs0LVbDf+wQ1zXLwFT5AXA1md1+W OEhk6u2Akhy+dDcvfWBPpD9liVSR5JeXRQhrxiGt3NOHcvOL2ngmpeU7ypJysT+zOswl 996eYlrk3zzqgXjnKfM3qdE6LEsiZfP3vHgGw3pO0C5Yy7fBI++JesW/ky7E2kltV6rc E4o4R6Li72j3Zu1qI7n9/plWqctHPY7QsLbDGUqZFAjSndWp2tSsbbuEzI8SqghJOdxS mp6A== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:subject:message-id:date:from:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:dkim-signature; bh=fKPti6GPVpVzlACAJ9Y0pbD+Ci+HzVHMAZ9cl1ew3wg=; fh=Qt7jFg0C3/sEd4oorGNUq7W7L0nZpsxfwceJ630pZiU=; b=BAlTZBEiBZ2dLvBy3W754CDlqpRkL+3rbpYgaZswIWp2uwS4c0z6c4b2TYSTq1u9r2 b6ye2Mf9LId0JtP5uYdYF654n5MN5cQrKV8izQubJNzJgREyrCJLWE2ltVfeI8itCqBO 2SOuc4w9RAPYRsVnm4cGZUjJBXhPIrzzwGrO/qrjqIW8fi5mzo/dnn/5s9JMEZhCXPul kSlVuARxmRaoWx6Z5M0gKCfV+4GmSVFSvajz0eXfJwA14lcKwSL1Zi4A9obzp65WnPlZ WyrUX8ayegizofjZD+D6hfAbwRK42N3MCZfBNb62mhMyYVqIP72voXrKyKHtYeIt5Vc/ AF1g==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@gooddata.com header.s=google header.b=MLcaWDqm; arc=pass (i=1 spf=pass spfdomain=gooddata.com dkim=pass dkdomain=gooddata.com dmarc=pass fromdomain=gooddata.com); spf=pass (google.com: domain of linux-kernel+bounces-146341-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-146341-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gooddata.com Return-Path: Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [2604:1380:45e3:2400::1]) by mx.google.com with ESMTPS id y8-20020a170902700800b001e464fae16esi9073375plk.394.2024.04.15.23.21.42 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Apr 2024 23:21:42 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-146341-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1; Authentication-Results: mx.google.com; dkim=pass header.i=@gooddata.com header.s=google header.b=MLcaWDqm; arc=pass (i=1 spf=pass spfdomain=gooddata.com dkim=pass dkdomain=gooddata.com dmarc=pass fromdomain=gooddata.com); spf=pass (google.com: domain of linux-kernel+bounces-146341-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-146341-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gooddata.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 5DE3F280A76 for ; Tue, 16 Apr 2024 06:21:42 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 59A1842AB9; Tue, 16 Apr 2024 06:18:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=gooddata.com header.i=@gooddata.com header.b="MLcaWDqm" Received: from mail-lj1-f174.google.com (mail-lj1-f174.google.com [209.85.208.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E284B3C6A6 for ; Tue, 16 Apr 2024 06:18:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713248323; cv=none; b=DKeP6DcPNv74WzwODAhN6/Wn43C3wjbg+67XDEu+fQyjUzy2KPnwC6Pmk29lSyxY2T5TIPAVMcJ35hYwnhvZElRt3HSml3w3DYfMVQDcEA+b6sz4QIjwyYzEvah1H0j7q5koOwiC0yDn6Q9ZvS5ASoPL64gwlhD+3SVVrMMHDqw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713248323; c=relaxed/simple; bh=fKPti6GPVpVzlACAJ9Y0pbD+Ci+HzVHMAZ9cl1ew3wg=; h=MIME-Version:From:Date:Message-ID:Subject:To:Cc:Content-Type; b=i8pIWadB9WryiTq3BFRjpsoI+4B+xTfUc83if1Qq8EwJQsBivh273gT5MM2F0pcgSZkBnZGafrw1wQCPhpOUc0Uf7a5QOGhx111tek04dnsFIQ1v0HWwGPTMvPpzWf2Til+PrfXFLziF4evx4ChaN52b2U7+fjCyS+ekPUJJ3A8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gooddata.com; spf=pass smtp.mailfrom=gooddata.com; dkim=pass (1024-bit key) header.d=gooddata.com header.i=@gooddata.com header.b=MLcaWDqm; arc=none smtp.client-ip=209.85.208.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gooddata.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gooddata.com Received: by mail-lj1-f174.google.com with SMTP id 38308e7fff4ca-2da08b06e0dso42773981fa.2 for ; Mon, 15 Apr 2024 23:18:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gooddata.com; s=google; t=1713248320; x=1713853120; darn=vger.kernel.org; h=cc:to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=fKPti6GPVpVzlACAJ9Y0pbD+Ci+HzVHMAZ9cl1ew3wg=; b=MLcaWDqmcPMCubw8WI8I2vpECjmumRy431Ddg4CKQibb4LF1glwoDjtypTZFc1sZC+ 3QHKlJSeyH2MYH6xFMgDFktRhfFK11PwlvjLNEtgGFhe6VVyhDs9p+AEnlD2MV10E6LC afrBmg/HdjfWE/d3FG0rs2H8L41v3gvjWg0wA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713248320; x=1713853120; h=cc:to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=fKPti6GPVpVzlACAJ9Y0pbD+Ci+HzVHMAZ9cl1ew3wg=; b=seGt1HkX531amNUSpv0uG2xq5mjfscVIJ60VbZVJ3pG1n43HMPv1S5uQosWZjdh2WH NyLTicf+k5PlxDNxR210z3A+CtDNK+Z4R/qOJfSLd4NB18g7a7YMs9o3xPnEOeyXiqKv igdzA7CB70Txfa2EdA12FZVFDh+wkW/Zy6qpZ49Pz3kfMKmsBV+xZicZttTg8iy1fm4s +6fBlLYjCS6ipzh4KY3tFq9pTyb1IrGSrDD7DNRGoBHYA1ff19VVKfnzvAiTrflRrAmA z/bDFaclDPzFE6VXXeAK5Xu8g559ZpRTCqPBOdDcjNaA++aQmUaKWthMJp1deE1++5Lt qWwQ== X-Gm-Message-State: AOJu0YxvHwlHORcWZMOGLsohd8UBfh9aJ5SobEv9clT+wN27PnSGUcgA ZV1PV8xkGXL8c98aaGJxX2ur79fhWPKXjuynskUXYiXmmhCKaBk7fK/92r/lhSXcF2LF5NcgT5O oQa5MFHeUMLTH7vpBg7/61FBQ7i8OHV87mEGX X-Received: by 2002:a2e:a99e:0:b0:2d8:270f:9764 with SMTP id x30-20020a2ea99e000000b002d8270f9764mr9411912ljq.40.1713248319975; Mon, 15 Apr 2024 23:18:39 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Igor Raits Date: Tue, 16 Apr 2024 08:18:28 +0200 Message-ID: Subject: Re: 6.8 to 6.9.0-rc3: kernel NULL pointer dereference in pick_next_task_fair+0x89 To: Peter Zijlstra Cc: linux-kernel@vger.kernel.org, Ingo Molnar , slyich@gmail.com, wuyun.abel@bytedance.com, yu.c.chen@intel.com Content-Type: text/plain; charset="UTF-8" Hello all, We also see this issue quite frequently these days, however it gets slightly hidden behind printk issue so that full stacktrace can't be printed due to the deadlock. If you will have any patch to try out we are happy to test.