From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2FF2C433E2 for ; Sat, 5 Sep 2020 05:19:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 64F72208DB for ; Sat, 5 Sep 2020 05:19:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="B6KqEeQd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726353AbgIEFTt (ORCPT ); Sat, 5 Sep 2020 01:19:49 -0400 Received: from mout.gmx.net ([212.227.15.15]:58201 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725800AbgIEFTt (ORCPT ); Sat, 5 Sep 2020 01:19:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1599283151; bh=rwJdyAHG3C5LedVfBNN5zPz491EITwDDDYp7es9j+0Q=; h=X-UI-Sender-Class:Subject:From:To:Cc:Date:In-Reply-To:References; b=B6KqEeQd0ZcKGHSUR0z0kwtYycM57Cyc/fKoP2589ZxkqW8znZtF9CTfAoEXlitdP JIJtFc0gL4kRkT5td6jeRHAm0D5BhlpxxJKaqpIzDFVZrHnWbDuyp53tqy1PuHJlvN 0izjVsUVEIxiI0DZrnzhBYnJc4iIOXVHEWteAKn0= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from homer.simpson.net ([185.146.50.208]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1M4axg-1kEyIj1bAE-001hko; Sat, 05 Sep 2020 07:19:11 +0200 Message-ID: Subject: Re: v5.9-rc3-rt3 boot time networking lockdep splat From: Mike Galbraith To: Sebastian Andrzej Siewior , Thomas Gleixner Cc: LKML , linux-rt-users , Steven Rostedt Date: Sat, 05 Sep 2020 07:19:10 +0200 In-Reply-To: <46a2b89ec8d953a4be18c7389c7d8c66310a7ff0.camel@gmx.de> References: <20200902155557.h2wl2qpfn2rwsofw@linutronix.de> <46a2b89ec8d953a4be18c7389c7d8c66310a7ff0.camel@gmx.de> Content-Type: text/plain; charset="ISO-8859-15" User-Agent: Evolution 3.34.4 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:B9ZOW6FCooJa08wS0Ikw/bURGD3tjVyfNihh31TvtsCoafQ3Ohn CElGr6izntKxTxC7nxpbhcyCXrAfVFXt6meAdOEgWOKiRY2Pw2K/ewhbAcnra3xOe5Lfks1 3YTBNEvhkX5KmabomwFxtapdoSqkDsZc7NnEdlXe+CYKi6/fS6523cf3N0QhiCReC2SJNEZ NAlrfqCJiSOGhGPda/JMQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:5kx/JMdNNUs=:aFiM/+3uU/3RjEPzFAryZi I2ZRBRNEAONwq5s1eN4XuUDa5f9VWv3XoiTQIn7ZogOaQi265yuYQNqi4cq0xwYWPz16rf8H3 RuS0UbpaZW5zfswW79M973tkhpTFdG6kEzamuHuew4JtoLT76dmTH392xFbOkm8HYI4cvoxTM hGG7sN6WGWABPIu3PI/gi4KdJiy1BYbd9GQm3phWQn2aOrA2NmOMsRXw6PoVQmh387688XYjp 8Ft1tFnPi2mWbr/kl31pWdhPWPrm6lrE49fwMNCwPLnogQyJeciSWMmcTUlwkzPfehKkG07Ey nH7H/k+++F5X2iR+2JJ9Ffxp8pbq3fvjzPHDkKchwo1kvy6EfsLygHxCNB2OMIrvEAGo2FrKC Sg7lHyLhxadfIv6uxRyLUmfSStviqN6nor2nEgOKuX3LrfujrO+BcsNFNylYwWYX+8xTwAQOv B6u7oJKWRGxm+EZ9fJly8t36iAz1a0odxgION85dJQWgm+38CO0VFVRZuYGcuEFZUHy9XSDe7 so0YiJPACrMu0khRqxjvMTJ9VWt78NN9didrTQKzJd3YwTcHzL1khGV1VMz1OQXlaq3PlqDup g11aNd3R/plvL9pkDAHEvHKwZaQ7ViXSFcvZ88wwnLZ8f+68p6bFV3AveMai6wDCaYVjeaios T0kScy/D7wK105IWg00EfX3hvek504yygQZRSa/BpVOJHwf1AsuTrCFgoFAaxybDiMRF/4r/I awdV+Zw7MZXqkDQRRseXYU6S5RfoCmpYiCz5fb8ygwXkIN46FbHGq9gZaJXTQ57HOc/4UA7QK G20YwR7jDv0SkF/78iyg0Sxp37TM+BA6XJcUEg97W9h5eRDrwpZM12JBQA5+mcQ2O7gUewG4+ GwgGSI5RRaalrUfSuCFX1+nFaTopRwgv9U7ceCat5Ef1OM/6zWu5TbBM79yBZX1zc19uSpaP2 p+0QULDNNTE0cOsl8XJdxoGjtyimhIOTRsdjusAZumZcU2PxeRfKkN/QshDMR0UY7PJJALO/d bvslfQ2HmMawXyDvw5IRNxWrn60QBzTJDpLKZueCByCaQaubLpukenOZjLrJRILJMM2BPCZn3 6HcIpO7MKPKExZ87mvb9nrqvEHqfaIa10zwnMtH/+IXpIKrX7RWR2a/di4rqMJosFcrcYHFXT Ux4a6rFtC8/5kWUq9bX3WMRxMu11ZWJtJF4u4fIGLlGUO8JjARvMzvGkWN/IxvbJUiNjPQwa1 M4sAGbyd+5VpIf5Rf Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Lappy, which does not use bridge, boots clean... but lock leakage pretty darn quickly inspires lockdep to craps its drawers. [ 209.001111] BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! [ 209.001113] turning off the locking correctness validator. [ 209.001114] CPU: 2 PID: 3773 Comm: Socket Thread Tainted: G S I E 5.9.0.gc70672d-rt3-rt #8 [ 209.001117] Hardware name: HP HP Spectre x360 Convertible/804F, BIOS F.47 11/22/2017 [ 209.001118] Call Trace: [ 209.001123] dump_stack+0x77/0x9b [ 209.001129] validate_chain+0xf60/0x1230 [ 209.001135] __lock_acquire+0x880/0xbf0 [ 209.001139] lock_acquire+0x92/0x3f0 [ 209.001142] ? rcu_note_context_switch+0x118/0x550 [ 209.001146] ? update_load_avg+0x5cc/0x6d0 [ 209.001150] _raw_spin_lock+0x2f/0x40 [ 209.001153] ? rcu_note_context_switch+0x118/0x550 [ 209.001155] rcu_note_context_switch+0x118/0x550 [ 209.001157] ? lockdep_hardirqs_off+0x6e/0xd0 [ 209.001161] __schedule+0xbe/0xb50 [ 209.001163] ? mark_held_locks+0x2d/0x80 [ 209.001166] preempt_schedule_irq+0x44/0xb0 [ 209.001168] irqentry_exit+0x5b/0x80 [ 209.001170] asm_sysvec_reschedule_ipi+0x12/0x20 [ 209.001173] RIP: 0010:debug_lockdep_rcu_enabled+0x23/0x30 [ 209.001175] Code: 0f 0b e9 6d ff ff ff 8b 05 0a a0 c5 00 85 c0 74 21 8b 05 cc da c5 00 85 c0 74 17 65 48 8b 04 25 c0 91 01 00 8b 80 8c 0a 00 00 <85> c0 0f 94 c0 0f b6 c0 f3 c3 cc cc cc 65 48 8b 04 25 c0 91 01 00 [ 209.001178] RSP: 0018:ffffa00202a0f998 EFLAGS: 00000202 [ 209.001179] RAX: 0000000000000000 RBX: ffff90a8a6d1da20 RCX: 0000000000000001 [ 209.001180] RDX: 0000000000000002 RSI: ffffffff971308fc RDI: ffffffff9710b092 [ 209.001181] RBP: 0000000000000048 R08: 0000000000000001 R09: 0000000000000001 [ 209.001181] R10: ffff90a8a6d1da38 R11: 0000000000000006 R12: ffffffff97405280 [ 209.001182] R13: 0000000000000008 R14: ffffffff97405240 R15: 0000000000000100 [ 209.001188] rt_spin_unlock+0x2c/0x90 [ 209.001191] __do_softirq+0xc1/0x5b2 [ 209.001194] ? ip_finish_output2+0x264/0xa10 [ 209.001197] __local_bh_enable_ip+0x230/0x290 [ 209.001200] ip_finish_output2+0x288/0xa10 [ 209.001201] ? rcu_read_lock_held+0x32/0x40 [ 209.001206] ? ip_output+0x70/0x200 [ 209.001207] ip_output+0x70/0x200 [ 209.001210] ? __ip_finish_output+0x320/0x320 [ 209.001212] __ip_queue_xmit+0x1f0/0x5d0 [ 209.001216] __tcp_transmit_skb+0xa7f/0xc70 [ 209.001219] ? __alloc_skb+0x7b/0x1b0 [ 209.001222] ? __kmalloc_node_track_caller+0x252/0x330 [ 209.001230] tcp_rcv_established+0x365/0x6d0 [ 209.001233] tcp_v4_do_rcv+0x7e/0x1b0 [ 209.001236] __release_sock+0x89/0x130 [ 209.001239] release_sock+0x3c/0xd0 [ 209.001241] tcp_recvmsg+0x2b9/0xa90 [ 209.001247] inet_recvmsg+0x6b/0x210 [ 209.001252] __sys_recvfrom+0xb8/0x110 [ 209.001256] ? poll_select_finish+0x1f0/0x1f0 [ 209.001261] ? syscall_enter_from_user_mode+0x37/0x340 [ 209.001263] ? syscall_enter_from_user_mode+0x3c/0x340 [ 209.001265] ? lockdep_hardirqs_on+0x78/0x100 [ 209.001268] __x64_sys_recvfrom+0x24/0x30 [ 209.001269] do_syscall_64+0x33/0x40 [ 209.001271] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 209.001274] RIP: 0033:0x7ff2421a230a [ 209.001276] Code: 7c 24 08 4c 89 14 24 e8 44 f8 ff ff 45 31 c9 89 c3 45 31 c0 4c 8b 14 24 4c 89 e2 48 89 ee 48 8b 7c 24 08 b8 2d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 32 89 df 48 89 04 24 e8 73 f8 ff ff 48 8b 04 [ 209.001278] RSP: 002b:00007ff24243a550 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 209.001279] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff2421a230a [ 209.001280] RDX: 00000000000034da RSI: 00007ff21094fb37 RDI: 000000000000006b [ 209.001281] RBP: 00007ff21094fb37 R08: 0000000000000000 R09: 0000000000000000 [ 209.001282] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000034da [ 209.001283] R13: 00007ff21094fb37 R14: 0000000000000000 R15: 00007ff20e8a4000