From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 446D1179965 for ; Wed, 10 Apr 2024 16:15:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712765714; cv=none; b=lOf5fPUjhBjbDkvry5T+AZiqpK0xbqab/cn57a59+CYyv1zStFcRaJdIVfHzS34KNmimDnLO7IvrPTKOtg6QJXZ16GWMw9FrCD7cp133IoFh8rZ+iN9iuTjWjDCNsqweYvmvIkrVvndAsL2bgdsKn/QUeuD2h4tu4fQO5OW+m3Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712765714; c=relaxed/simple; bh=c3mBZSnO8jnGv/QXoxhkQtpiH3KuqK73LmqQGUBO3fc=; h=Date:MIME-Version:Content-Type:From:To:Message-ID:Subject; b=Z0WDvYuBKnGGhaK6G03uw0cDMJeQ2yWjAbMYEjEnyzsG70bS+K7hpXfKfuKmqUU/ujfh+Jq1V2LYk0Y8suTR5rAG88uoF/UqnGwMqfQxZQYFCXr5cEY4SQhYHU51FOzm7Yo6kRyXgzjOmenVdkrYag8YHRlLxDM7DIugSXf6nx8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IYii3Z9P; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IYii3Z9P" Received: by smtp.kernel.org (Postfix) with ESMTPS id 259DDC43394 for ; Wed, 10 Apr 2024 16:15:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712765714; bh=c3mBZSnO8jnGv/QXoxhkQtpiH3KuqK73LmqQGUBO3fc=; h=Date:From:To:Subject:From; b=IYii3Z9Ppa5QTME4Es0d7ksEYhSsg1CnhvGXzWqI66fomS8MceqDv3lNV0MaImTdG th/TfpHOQOg3omgW6dWYr1Y1obROkOwX6yQD/3AcpQtsG+za5StVEkevj7eH4DPhwI BgWm/WmBRRW7cfzIN1OAcmnkMAjknm/UBzqhB6vGvIAzclHCmGP1jYD0HuAIXMH9C3 JkZeHyu9YekPaO9uarP9498PyE+AdVsxz1Cfe6O3gVj5ltdI5eUAuBrjEB4qTVS79n w9+nxJj7SQ+uurA4mwzBLWlBT6SpwtGSEeTkXQ+Yy1U+i4hWkCbXk6H9JPW/JVuopl X7gKYDvflseRw== Received: from aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (localhost.localdomain [127.0.0.1]) by aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (Postfix) with ESMTP id 0FBBAD6030E for ; Wed, 10 Apr 2024 16:15:14 +0000 (UTC) Date: Wed, 10 Apr 2024 16:15:10 +0000 Precedence: bulk X-Mailing-List: bugs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit From: "Kernel.org Bugbot" To: bugs@lists.linux.dev Message-ID: <20240410-b218698c0-cb3e9db062a2@bugzilla.kernel.org> Subject: Kernel panic on adding vCPU to guest in Linux 6.9-rc2 X-Bugzilla-Product: Linux X-Bugzilla-Component: Kernel X-Mailer: peebz 0.1 xiangfeix.ma added an attachment on Kernel.org Bugzilla: Created attachment 306112 guest error log Environment: Host OS: CentOS 9 Host kernel: 6.9.0-rc1 KVM commit: 9bc60f73 Qemu commit: e5c6528d Guest kernel: 6.9-rc2 Guest commit: 39cd87c4eb2b893354f3b850f916353f2658ae6f Guest repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git Bug detail description:  When hot adding a vCPU to the guest, the guest happens Call Trace and reboot. Latest successful guest kernel version: 6.8.0-rc7 (commit: 90d35da658da8cff0d4ecbb5113f5fac9d00eb72). Reproduce steps:  1. Create guest: qemu-system-x86_64 -accel kvm -cpu host -smp 4,maxcpus=128 -drive file=/share/xvs/var/tmp-img_vcpu_hot_add_1712412537,if=none,id=virtio-disk0 -device virtio-blk-pci,drive=virtio-disk0,bootindex=0 -m 4096 -monitor pty -daemonize -vnc :16147 -device virtio-net-pci,netdev=nic0,mac=00:c0:82:16:fa:b0 -netdev tap,id=nic0,br=virbr0,helper=/usr/local/libexec/qemu-bridge-helper,vhost=on 2. Add vCPU to guest echo 'device_add driver=host-x86_64-cpu,socket-id=0,core-id=4,thread-id=0' > /dev/pts/2 cat /dev/pts/2 Error log:  [   49.782913] Call Trace: [   49.783039]   [   49.783147]  ? __die+0x24/0x70 [   49.783309]  ? page_fault_oops+0x82/0x150 [   49.783518]  ? kernelmode_fixup_or_oops+0x84/0x110 [   49.783753]  ? exc_page_fault+0xb9/0x160 [   49.783948]  ? asm_exc_page_fault+0x26/0x30 [   49.784144]  ? cpu_update_apic+0x1c/0x70 [   49.784327]  generic_processor_info+0x7e/0x160 [   49.784541]  acpi_register_lapic+0x19/0x80 [   49.784732]  acpi_map_cpu+0x26/0x90 [   49.784896]  acpi_processor_get_info+0x256/0x490 [   49.785344]  acpi_processor_add+0xb9/0x1f0 [   49.785760]  acpi_bus_attach+0x13b/0x220 [   49.786158]  acpi_bus_scan+0x7e/0x1e0 [   49.786548]  acpi_device_hotplug+0x198/0x2b0 [   49.786963]  acpi_hotplug_work_fn+0x1e/0x30 [   49.787363]  process_one_work+0x159/0x370 [   49.787790]  worker_thread+0x302/0x420 [   49.788184]  ? __pfx_worker_thread+0x10/0x10 [   49.788592]  kthread+0xe3/0x120 [   49.788955]  ? __pfx_kthread+0x10/0x10 [   49.789335]  ret_from_fork+0x31/0x50 [   49.789720]  ? __pfx_kthread+0x10/0x10 [   49.790100]  ret_from_fork_asm+0x1b/0x30 [   49.790491]   File: serial_error_guest.log (text/plain) Size: 98.02 KiB Link: https://bugzilla.kernel.org/attachment.cgi?id=306112 --- guest error log You can reply to this message to join the discussion. -- Deet-doot-dot, I am a bot. Kernel.org Bugzilla (peebz 0.1)