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Message #96285
[Bug 1403459] [NEW] kernel bug when hotplugging a CPU
Public bug reported:
When I hot-plug a CPU to an Ubuntu 14.10 VM running on KVM, I get
following kernel bug. Ubuntu 14.04 is not affected by this bug.
# uname -a
Linux ubuntu 3.16.0-28-generic #38-Ubuntu SMP Fri Dec 12 17:37:40 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
# dmesg
[ 109.469094] CPU1 has been hot-added
[ 109.477005] SMP alternatives: switching to SMP code
[ 109.490583] x86: Booting SMP configuration:
[ 109.490586] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 109.476344] kvm-clock: cpu 1, msr 0:3ffe6041, secondary cpu clock
[ 109.586704] kvm: enabling virtualization on CPU1
[ 109.596330] KVM setup async PF for cpu 1
[ 109.596330] kvm-stealtime: cpu 1, msr 3de2d100
[ 109.596645] microcode: CPU1: patch_level=0x01000065
[ 109.596910] Will online and init hotplugged CPU: 1
[ 109.598469] kobject '(null)' (ffff88003de3b5d8): tried to add an uninitialized object, something is seriously wrong.
[ 109.599255] CPU: 0 PID: 1424 Comm: systemd-udevd Not tainted 3.16.0-28-generic #38-Ubuntu
[ 109.599257] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 109.599259] ffff880036465250 ffff88003af77c88 ffffffff81781eaa ffff88003de3b5d8
[ 109.599263] ffff88003af77cf8 ffffffff8139e896 ffff880000000020 ffff88003af77d08
[ 109.599266] ffff88003af77cb0 ffff88003af77cc8 ffffffff8137967b 0000000000000001
[ 109.599269] Call Trace:
[ 109.599276] [<ffffffff81781eaa>] dump_stack+0x45/0x56
[ 109.599280] [<ffffffff8139e896>] kobject_add+0xa6/0xb0
[ 109.599283] [<ffffffff8137967b>] ? get_first_sibling+0x2b/0x40
[ 109.599287] [<ffffffff8139d08d>] ? ida_get_new_above+0x1dd/0x210
[ 109.599291] [<ffffffff81378b66>] blk_mq_register_hctx+0xa6/0xc0
[ 109.599293] [<ffffffff813794c1>] blk_mq_sysfs_register+0x41/0x60
[ 109.599297] [<ffffffff81376fc2>] blk_mq_queue_reinit_notify+0x72/0xb0
[ 109.599300] [<ffffffff8109972d>] notifier_call_chain+0x4d/0x70
[ 109.599303] [<ffffffff8109983e>] __raw_notifier_call_chain+0xe/0x10
[ 109.599306] [<ffffffff81070133>] cpu_notify+0x23/0x50
[ 109.599309] [<ffffffff81070348>] _cpu_up+0x168/0x180
[ 109.599312] [<ffffffff810703ea>] cpu_up+0x8a/0xb0
[ 109.599315] [<ffffffff81778ee0>] cpu_subsys_online+0x40/0xa0
[ 109.599319] [<ffffffff814cf225>] device_online+0x65/0x90
[ 109.599322] [<ffffffff814cf2cd>] online_store+0x7d/0x90
[ 109.599325] [<ffffffff814cc658>] dev_attr_store+0x18/0x30
[ 109.599328] [<ffffffff8125950a>] sysfs_kf_write+0x3a/0x50
[ 109.599331] [<ffffffff812586ae>] kernfs_fop_write+0xee/0x180
[ 109.599335] [<ffffffff811e10b7>] vfs_write+0xb7/0x1f0
[ 109.599338] [<ffffffff811e1c66>] SyS_write+0x46/0xb0
[ 109.599342] [<ffffffff81789eed>] system_call_fastpath+0x1a/0x1f
I initially reported this bug in openSUSE and it was fixed in the Linus
tree:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06a41a9
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (openSUSE)
Importance: Unknown
Status: Unknown
** Bug watch added: Novell/SUSE Bugzilla #908794
https://bugzilla.novell.com/show_bug.cgi?id=908794
** Also affects: linux (openSUSE) via
https://bugzilla.novell.com/show_bug.cgi?id=908794
Importance: Unknown
Status: Unknown
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1403459
Title:
kernel bug when hotplugging a CPU
Status in linux package in Ubuntu:
New
Status in linux package in openSUSE:
Unknown
Bug description:
When I hot-plug a CPU to an Ubuntu 14.10 VM running on KVM, I get
following kernel bug. Ubuntu 14.04 is not affected by this bug.
# uname -a
Linux ubuntu 3.16.0-28-generic #38-Ubuntu SMP Fri Dec 12 17:37:40 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
# dmesg
[ 109.469094] CPU1 has been hot-added
[ 109.477005] SMP alternatives: switching to SMP code
[ 109.490583] x86: Booting SMP configuration:
[ 109.490586] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 109.476344] kvm-clock: cpu 1, msr 0:3ffe6041, secondary cpu clock
[ 109.586704] kvm: enabling virtualization on CPU1
[ 109.596330] KVM setup async PF for cpu 1
[ 109.596330] kvm-stealtime: cpu 1, msr 3de2d100
[ 109.596645] microcode: CPU1: patch_level=0x01000065
[ 109.596910] Will online and init hotplugged CPU: 1
[ 109.598469] kobject '(null)' (ffff88003de3b5d8): tried to add an uninitialized object, something is seriously wrong.
[ 109.599255] CPU: 0 PID: 1424 Comm: systemd-udevd Not tainted 3.16.0-28-generic #38-Ubuntu
[ 109.599257] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 109.599259] ffff880036465250 ffff88003af77c88 ffffffff81781eaa ffff88003de3b5d8
[ 109.599263] ffff88003af77cf8 ffffffff8139e896 ffff880000000020 ffff88003af77d08
[ 109.599266] ffff88003af77cb0 ffff88003af77cc8 ffffffff8137967b 0000000000000001
[ 109.599269] Call Trace:
[ 109.599276] [<ffffffff81781eaa>] dump_stack+0x45/0x56
[ 109.599280] [<ffffffff8139e896>] kobject_add+0xa6/0xb0
[ 109.599283] [<ffffffff8137967b>] ? get_first_sibling+0x2b/0x40
[ 109.599287] [<ffffffff8139d08d>] ? ida_get_new_above+0x1dd/0x210
[ 109.599291] [<ffffffff81378b66>] blk_mq_register_hctx+0xa6/0xc0
[ 109.599293] [<ffffffff813794c1>] blk_mq_sysfs_register+0x41/0x60
[ 109.599297] [<ffffffff81376fc2>] blk_mq_queue_reinit_notify+0x72/0xb0
[ 109.599300] [<ffffffff8109972d>] notifier_call_chain+0x4d/0x70
[ 109.599303] [<ffffffff8109983e>] __raw_notifier_call_chain+0xe/0x10
[ 109.599306] [<ffffffff81070133>] cpu_notify+0x23/0x50
[ 109.599309] [<ffffffff81070348>] _cpu_up+0x168/0x180
[ 109.599312] [<ffffffff810703ea>] cpu_up+0x8a/0xb0
[ 109.599315] [<ffffffff81778ee0>] cpu_subsys_online+0x40/0xa0
[ 109.599319] [<ffffffff814cf225>] device_online+0x65/0x90
[ 109.599322] [<ffffffff814cf2cd>] online_store+0x7d/0x90
[ 109.599325] [<ffffffff814cc658>] dev_attr_store+0x18/0x30
[ 109.599328] [<ffffffff8125950a>] sysfs_kf_write+0x3a/0x50
[ 109.599331] [<ffffffff812586ae>] kernfs_fop_write+0xee/0x180
[ 109.599335] [<ffffffff811e10b7>] vfs_write+0xb7/0x1f0
[ 109.599338] [<ffffffff811e1c66>] SyS_write+0x46/0xb0
[ 109.599342] [<ffffffff81789eed>] system_call_fastpath+0x1a/0x1f
I initially reported this bug in openSUSE and it was fixed in the
Linus tree:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06a41a9
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1403459/+subscriptions
Follow ups
-
[Bug 1403459] Re: kernel bug when hotplugging a CPU
From: Rolf Leggewie, 2016-04-24
-
[Bug 1403459] Re: kernel bug when hotplugging a CPU
From: Joseph Salisbury, 2015-01-07
-
[Bug 1403459] Re: kernel bug when hotplugging a CPU
From: Benjamin Drung, 2015-01-05
-
[Bug 1403459] Re: kernel bug when hotplugging a CPU
From: Joseph Salisbury, 2014-12-17
-
[Bug 1403459] Re: kernel bug when hotplugging a CPU
From: Joseph Salisbury, 2014-12-17
-
[Bug 1403459] Re: kernel bug when hotplugging a CPU
From: Bug Watch Updater, 2014-12-17
-
[Bug 1403459] WifiSyslog.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] UdevLog.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] UdevDb.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] ProcModules.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] ProcInterrupts.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] ProcEnviron.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] ProcCpuinfo.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] Lspci.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] CurrentDmesg.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] BootDmesg.txt
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] Re: kernel bug when hotplugging a CPU
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] Missing required logs.
From: Brad Figg, 2014-12-17
-
[Bug 1403459] Re: kernel bug when hotplugging a CPU
From: Bug Watch Updater, 2014-12-17
-
[Bug 1403459] Re: kernel bug when hotplugging a CPU
From: Benjamin Drung, 2014-12-17
-
[Bug 1403459] [NEW] kernel bug when hotplugging a CPU
From: Benjamin Drung, 2014-12-17
References