From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) (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 6C3111FD3 for ; Sun, 1 Jan 2023 07:37:37 +0000 (UTC) Received: by mail-pj1-f49.google.com with SMTP id j8-20020a17090a3e0800b00225fdd5007fso15922940pjc.2 for ; Sat, 31 Dec 2022 23:37:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=MWEjzEKMcmAbvxrRrbtXpBikge1S3ux2aaGfJM/CGG8=; b=XdIjmK43cqk1mzlCRNkZuxHLLQKxmz/csAj4EjfvTPRHslw05qnS/roYQwp2c+8gkk SBrMkrrlF+wMivNPFlXX23nfW2nPcA2vyhr1zPAUczjsTKhzSULcPny6Fcv4NO4h1pyr 4ZfFvS7+CcwAmUliZmdJYxApAU/afGNPwQyAZBHCLF8FWihGsUnulXEVWj98zLClD3cT RTARotrhz2sPHTsaL1Sxudpc89lQytmtt1qm9oMs6FLqlHR7gDXjVNEUwdEowXV6TwNU vrnlLQuE4KI7EN5QBLVw4Ac2NQNvXtMI4meiJPEE1BVLyB6S2oysQ1MNve6sLo1yJJ9u RI1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=MWEjzEKMcmAbvxrRrbtXpBikge1S3ux2aaGfJM/CGG8=; b=2vSZ/rHGc226evqiB/WzttKgZXJ6Kl8w6aYdScWmoV0gvLA3M0HQUdnzD2ys7HsrG6 F+hRbBqrX80gyfKAz7Qw03cn29aWGelwpKABR8/ytRi48mVSa62pqkdMHW7aC4XFCeSd BvePg/6+eIEVQSFnBtReG9SlGlMjQUdrWMnW6VRI4a8pxUite6j5xWcTrNwyDilebXHd byBJO48WzP9L5bpAVNPv0ytd14GYdRjFzHgfBPm6QEBK2i3UTb9XMEVr+dKimYFDCbNF oX7xBgGq9uBSCZ0U/tQwT7l6jIuYKg8e106WRp/BvEwWVVBR/wx997Bk0ZVc4jB7trBr 6x9w== X-Gm-Message-State: AFqh2kphGbalyUwg5gdybgtDcNeRjXubqdqKesEkRYnR/m8txktN1J4P twiDs8B5oBA+YtH0qsZ2klA= X-Google-Smtp-Source: AMrXdXt1t+EOG2ITGN8Df8z6C9zc7KW2F6DlvplBoxaBDIcy0sJFehT1daOtV6MttiJhjUsWrSPuWQ== X-Received: by 2002:a17:902:ed84:b0:189:6bda:e98f with SMTP id e4-20020a170902ed8400b001896bdae98fmr36043517plj.58.1672558656690; Sat, 31 Dec 2022 23:37:36 -0800 (PST) Received: from hyeyoo ([114.29.91.56]) by smtp.gmail.com with ESMTPSA id n3-20020a170902e54300b001745662d568sm17838326plf.278.2022.12.31.23.37.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 31 Dec 2022 23:37:35 -0800 (PST) Date: Sun, 1 Jan 2023 16:37:29 +0900 From: Hyeonggon Yoo <42.hyeyoo@gmail.com> To: kernel test robot Cc: Vlastimil Babka , oe-lkp@lists.linux.dev, lkp@intel.com, Mike Rapoport , Christoph Lameter , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Paolo Bonzini , Wanpeng Li , Vitaly Kuznetsov , Juergen Gross , "Srivatsa S. Bhat" , Alexey Makhalov , VMware PV-Drivers Reviewers , kvm@vger.kernel.org, Sean Christopherson Subject: supervisor write access in kernel mode in __pv_queued_spin_unlock_slowpath Message-ID: References: <202212312021.bc1efe86-oliver.sang@intel.com> Precedence: bulk X-Mailing-List: oe-lkp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Sun, Jan 01, 2023 at 03:50:28PM +0900, Hyeonggon Yoo wrote: > On Sat, Dec 31, 2022 at 11:26:25PM +0800, kernel test robot wrote: > > > > Greeting, > > > > FYI, we noticed kernel_BUG_at_include/linux/mm.h due to commit (built with gcc-11): > > > > commit: 0af8489b0216fa1dd83e264bef8063f2632633d7 ("mm, slub: remove percpu slabs with CONFIG_SLUB_TINY") > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master > > > > [test failed on linux-next/master c76083fac3bae1a87ae3d005b5cb1cbc761e31d5] > > > > in testcase: rcutorture > > version: > > with following parameters: > > > > runtime: 300s > > test: default > > torture_type: tasks-tracing > > > > test-description: rcutorture is rcutorture kernel module load/unload test. > > test-url: https://www.kernel.org/doc/Documentation/RCU/torture.txt > > > > > > on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G > > > > caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): > > > > > > If you fix the issue, kindly add following tag > > | Reported-by: kernel test robot > > | Link: https://lore.kernel.org/oe-lkp/202212312021.bc1efe86-oliver.sang@intel.com > > > > > > > > > > > > > To reproduce: > > > > # build kernel > > cd linux > > cp config-6.1.0-rc2-00014-g0af8489b0216 .config > > make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules > > make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 INSTALL_MOD_PATH= modules_install > > cd > > find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz > > > > > > git clone https://github.com/intel/lkp-tests.git > > cd lkp-tests > > bin/lkp qemu -k -m modules.cgz job-script # job-script is attached in this email > > > > # if come across any failure that blocks the test, > > # please remove ~/.lkp and /lkp dir to run from a clean state. > > > I was unable to reproduce in the same way as described above > because some files referenced in job-script couldn't be downloaded from > download.01.org/0day :( > > So I just built rcutorture module as builtin > and I got weird spinlock bug on commit: 0af8489b0216 > ("mm, slub: remove percpu slabs with CONFIG_SLUB_TINY") (+Cc KVM/Paravirt experts) > full dmesg added as attachment > > [ 1387.564837][ T57] BUG: unable to handle page fault for address: c108f5f4 > [ 1387.566649][ T57] #PF: supervisor write access in kernel mode > [ 1387.567965][ T57] #PF: error_code(0x0003) - permissions violation > [ 1387.569439][ T57] *pde = 010001e1 > [ 1387.570276][ T57] Oops: 0003 [#1] SMP > [ 1387.571149][ T57] CPU: 2 PID: 57 Comm: rcu_torture_rea Tainted: G S 6.1.0-rc2-00010-g0af8489b0216 #2130 63d19ac2b985fca570c354d8750f489755de37ed > [ 1387.574673][ T57] EIP: kvm_kick_cpu+0x54/0x90 > [ 1387.575802][ T57] Code: 2f c5 01 8b 04 9d e0 d4 4e c4 83 15 14 7b 2f c5 00 83 05 08 6d 2f c5 01 0f b7 0c 30 b8 05 00 00 00 83 15 0c 6d 2f c5 00 31 db <0f> 01 c1 83 05 10 6d 2f c5 01 8b 5d f8 8b 75 fc 83 15 14 6d 2f c5 > [ 1387.580456][ T57] EAX: 00000005 EBX: 00000000 ECX: 00000003 EDX: c108f5a0 > [ 1387.582071][ T57] ESI: c5153580 EDI: 00000046 EBP: c69cddf8 ESP: c69cddf0 > [ 1387.583775][ T57] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010046 > [ 1387.585643][ T57] CR0: 80050033 CR2: c108f5f4 CR3: 0776b000 CR4: 00350e90 > [ 1387.587492][ T57] Call Trace: > [ 1387.588365][ T57] __pv_queued_spin_unlock_slowpath+0x66/0x110 > [ 1387.589898][ T57] __pv_queued_spin_unlock+0x4b/0x60 > [ 1387.591040][ T57] __raw_callee_save___pv_queued_spin_unlock+0x9/0x10 > [ 1387.592771][ T57] do_raw_spin_unlock+0x49/0xa0 > [ 1387.593805][ T57] _raw_spin_unlock_irqrestore+0x53/0xd0 > [ 1387.594927][ T57] swake_up_one+0x4f/0x70 > [ 1387.595739][ T57] __rcu_report_exp_rnp+0x26b/0x470 > [ 1387.596730][ T57] rcu_report_exp_cpu_mult+0x82/0x2f0 > [ 1387.597770][ T57] rcu_qs+0xac/0x160 > [ 1387.598503][ T57] rcu_note_context_switch+0x31/0x1e0 > [ 1387.599460][ T57] __schedule+0xc5/0x770 > [ 1387.600195][ T57] __cond_resched+0x7a/0x100 > [ 1387.600996][ T57] stutter_wait+0x9e/0x2c0 > [ 1387.601956][ T57] rcu_torture_reader+0x162/0x3e0 > [ 1387.603048][ T57] ? rcu_torture_reader+0x3e0/0x3e0 > [ 1387.604269][ T57] ? __kthread_parkme+0xab/0xf0 > [ 1387.605420][ T57] kthread+0x167/0x1d0 > [ 1387.606383][ T57] ? rcu_torture_read_exit_child+0xa0/0xa0 > [ 1387.607516][ T57] ? kthread_exit+0x50/0x50 > [ 1387.608517][ T57] ret_from_fork+0x19/0x24 > [ 1387.609548][ T57] Modules linked in: > [ 1387.610187][ T57] CR2: 00000000c108f5f4 > [ 1387.610873][ T57] ---[ end trace 0000000000000000 ]--- > [ 1387.611829][ T57] EIP: kvm_kick_cpu+0x54/0x90 > [ 1387.612653][ T57] Code: 2f c5 01 8b 04 9d e0 d4 4e c4 83 15 14 7b 2f c5 00 83 05 08 6d 2f c5 01 0f b7 0c 30 b8 05 00 00 00 83 15 0c 6d 2f c5 00 31 db <0f> 01 c1 83 05 10 6d 2f c5 01 8b 5d f8 8b 75 fc 83 15 14 6d 2f c5 > [ 1387.616715][ T57] EAX: 00000005 EBX: 00000000 ECX: 00000003 EDX: c108f5a0 > [ 1387.618242][ T57] ESI: c5153580 EDI: 00000046 EBP: c69cddf8 ESP: c69cddf0 > [ 1387.619912][ T57] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010046 > [ 1387.621666][ T57] CR0: 80050033 CR2: c108f5f4 CR3: 0776b000 CR4: 00350e90 > [ 1387.623128][ T57] Kernel panic - not syncing: Fatal exception > [ 1389.285045][ T57] Shutting down cpus with NMI > [ 1389.297949][ T57] Kernel Offset: disabled > [ 1389.299174][ T57] ---[ end Kernel panic - not syncing: Fatal exception ]---