From: kernel test robot <oliver.sang@intel.com>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: <oe-lkp@lists.linux.dev>, <lkp@intel.com>, <oliver.sang@intel.com>
Subject: [frederic-dynticks:kthread/core] [mm] e6ec2411d3: WARNING:possible_circular_locking_dependency_detected
Date: Mon, 30 Jun 2025 10:48:48 +0800 [thread overview]
Message-ID: <202506300421.acdd1f02-lkp@intel.com> (raw)
Hello,
kernel test robot noticed "WARNING:possible_circular_locking_dependency_detected" on:
commit: e6ec2411d37d569fdb7986fa0e23d2234c8046ed ("mm: vmstat: Prepare to protect against concurrent isolated cpuset change")
https://git.kernel.org/cgit/linux/kernel/git/frederic/linux-dynticks.git kthread/core
in testcase: trinity
version: trinity-i386-abe9de86-1_20230429
with following parameters:
runtime: 600s
config: i386-randconfig-017-20250530
compiler: gcc-12
test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------+------------+
| | 52e18f45a9 | e6ec2411d3 |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------+------------+
| WARNING:possible_circular_locking_dependency_detected | 0 | 18 |
| WARNING:possible_circular_locking_dependency_detected_kworker##is_trying_to_acquire_lock:at:unregister_netdevice_many_notify_but_task_is_already_holding_lock:at:rtnl_lock | 0 | 18 |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------+------------+
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202506300421.acdd1f02-lkp@intel.com
[ 14.077507][ T12] WARNING: possible circular locking dependency detected
[ 14.078175][ T12] 6.16.0-rc2-00006-ge6ec2411d37d #1 Not tainted
[ 14.078775][ T12] ------------------------------------------------------
[ 14.079459][ T12] kworker/u8:0/12 is trying to acquire lock:
[ 14.080035][ T12] c9b2d054 (cpu_hotplug_lock){++++}-{0:0}, at: unregister_netdevice_many_notify (include/linux/find.h:67 net/core/dev.c:6354 net/core/dev.c:12056)
[ 14.081025][ T12]
[ 14.081025][ T12] but task is already holding lock:
[ 14.081699][ T12] c9fe21d8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock (net/core/rtnetlink.c:81)
[ 14.082357][ T12]
[ 14.082357][ T12] which lock already depends on the new lock.
[ 14.082357][ T12]
[ 14.083300][ T12]
[ 14.083300][ T12] the existing dependency chain (in reverse order) is:
[ 14.084119][ T12]
[ 14.084119][ T12] -> #2 (rtnl_mutex){+.+.}-{4:4}:
[ 14.084804][ T12] validate_chain (kernel/locking/lockdep.c:3288 kernel/locking/lockdep.c:3911)
[ 14.085275][ T12] __lock_acquire (kernel/locking/lockdep.c:5240)
[ 14.085781][ T12] lock_acquire (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873 kernel/locking/lockdep.c:5828)
[ 14.086248][ T12] __mutex_lock (kernel/locking/mutex.c:604 kernel/locking/mutex.c:747)
[ 14.086712][ T12] _mutex_lock_killable (kernel/locking/mutex.c:816)
[ 14.087217][ T12] rtnl_lock_killable (net/core/rtnetlink.c:92)
[ 14.087710][ T12] register_netdev (net/core/dev.c:11218)
[ 14.088184][ T12] e1000_probe (drivers/net/ethernet/intel/e1000/e1000_main.c:1196)
[ 14.088715][ T12] pci_device_probe (drivers/pci/pci-driver.c:324 drivers/pci/pci-driver.c:392 drivers/pci/pci-driver.c:418 drivers/pci/pci-driver.c:452)
[ 14.089211][ T12] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:657)
[ 14.089705][ T12] __driver_probe_device (drivers/base/dd.c:799)
[ 14.090238][ T12] driver_probe_device (drivers/base/dd.c:829)
[ 14.090748][ T12] __driver_attach (drivers/base/dd.c:1216 drivers/base/dd.c:1155)
[ 14.091229][ T12] bus_for_each_dev (drivers/base/bus.c:370)
[ 14.091727][ T12] driver_attach (drivers/base/dd.c:1234)
[ 14.092192][ T12] bus_add_driver (drivers/base/bus.c:678)
[ 14.092691][ T12] driver_register (drivers/base/driver.c:249)
[ 14.093147][ T12] __pci_register_driver (drivers/pci/pci-driver.c:1444)
[ 14.093688][ T12] e1000_init_module (drivers/net/ethernet/intel/e1000/e1000_main.c:224)
[ 14.094191][ T12] do_one_initcall (init/main.c:1274)
[ 14.094729][ T12] do_initcalls (init/main.c:1335 init/main.c:1352)
[ 14.095218][ T12] kernel_init_freeable (init/main.c:1588)
[ 14.095759][ T12] kernel_init (init/main.c:1476)
[ 14.096218][ T12] ret_from_fork (arch/x86/kernel/process.c:154)
[ 14.096755][ T12] ret_from_fork_asm (arch/x86/entry/entry_32.S:737)
[ 14.097269][ T12] restore_all_switch_stack (arch/x86/entry/entry_32.S:945)
[ 14.097848][ T12]
[ 14.097848][ T12] -> #1 (housekeeping_pcpu_lock){.+.+}-{0:0}:
[ 14.098660][ T12] validate_chain (kernel/locking/lockdep.c:3288 kernel/locking/lockdep.c:3911)
[ 14.099171][ T12] __lock_acquire (kernel/locking/lockdep.c:5240)
[ 14.099689][ T12] lock_acquire (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873 kernel/locking/lockdep.c:5828)
[ 14.100140][ T12] housekeeping_lock (arch/x86/include/asm/preempt.h:80 include/linux/percpu-rwsem.h:55 include/linux/percpu-rwsem.h:77 kernel/sched/isolation.c:31)
[ 14.100667][ T12] vmstat_shepherd (include/linux/sched/isolation.h:87 mm/vmstat.c:2119)
[ 14.101145][ T12] process_one_work (kernel/workqueue.c:3243)
[ 14.101659][ T12] process_scheduled_works (kernel/workqueue.c:3321)
[ 14.102215][ T12] worker_thread (include/linux/list.h:373 kernel/workqueue.c:946 kernel/workqueue.c:3403)
[ 14.102707][ T12] kthread (kernel/kthread.c:466)
[ 14.103153][ T12] ret_from_fork (arch/x86/kernel/process.c:154)
[ 14.103651][ T12] ret_from_fork_asm (arch/x86/entry/entry_32.S:737)
[ 14.104181][ T12] restore_all_switch_stack (arch/x86/entry/entry_32.S:945)
[ 14.104824][ T12]
[ 14.104824][ T12] -> #0 (cpu_hotplug_lock){++++}-{0:0}:
[ 14.105603][ T12] check_noncircular (kernel/locking/lockdep.c:2178)
[ 14.106128][ T12] check_prev_add (kernel/locking/lockdep.c:3169)
[ 14.106639][ T12] validate_chain (kernel/locking/lockdep.c:3288 kernel/locking/lockdep.c:3911)
[ 14.107158][ T12] __lock_acquire (kernel/locking/lockdep.c:5240)
[ 14.107676][ T12] lock_acquire (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873 kernel/locking/lockdep.c:5828)
[ 14.108171][ T12] cpus_read_lock (arch/x86/include/asm/preempt.h:80 include/linux/percpu-rwsem.h:55 include/linux/percpu-rwsem.h:77 kernel/cpu.c:490)
[ 14.108684][ T12] unregister_netdevice_many_notify (include/linux/find.h:67 net/core/dev.c:6354 net/core/dev.c:12056)
[ 14.109363][ T12] unregister_netdevice_many (net/core/dev.c:12141)
[ 14.109953][ T12] default_device_exit_batch (net/core/dev.c:12645)
[ 14.110542][ T12] ops_undo_list (net/core/net_namespace.c:206 net/core/net_namespace.c:253)
[ 14.111049][ T12] cleanup_net (net/core/net_namespace.c:688)
[ 14.111532][ T12] process_one_work (kernel/workqueue.c:3243)
[ 14.112067][ T12] process_scheduled_works (kernel/workqueue.c:3321)
[ 14.112695][ T12] worker_thread (include/linux/list.h:373 kernel/workqueue.c:946 kernel/workqueue.c:3403)
[ 14.113214][ T12] kthread (kernel/kthread.c:466)
[ 14.113670][ T12] ret_from_fork (arch/x86/kernel/process.c:154)
[ 14.114174][ T12] ret_from_fork_asm (arch/x86/entry/entry_32.S:737)
[ 14.114707][ T12] restore_all_switch_stack (arch/x86/entry/entry_32.S:945)
[ 14.115296][ T12]
[ 14.115296][ T12] other info that might help us debug this:
[ 14.115296][ T12]
[ 14.116281][ T12] Chain exists of:
[ 14.116281][ T12] cpu_hotplug_lock --> housekeeping_pcpu_lock --> rtnl_mutex
[ 14.116281][ T12]
[ 14.117530][ T12] Possible unsafe locking scenario:
[ 14.117530][ T12]
[ 14.118254][ T12] CPU0 CPU1
[ 14.118752][ T12] ---- ----
[ 14.119257][ T12] lock(rtnl_mutex);
[ 14.119646][ T12] lock(housekeeping_pcpu_lock);
[ 14.120360][ T12] lock(rtnl_mutex);
[ 14.120991][ T12] rlock(cpu_hotplug_lock);
[ 14.121444][ T12]
[ 14.121444][ T12] *** DEADLOCK ***
[ 14.121444][ T12]
[ 14.122220][ T12] 4 locks held by kworker/u8:0/12:
[ 14.122710][ T12] #0: b10fa6b4 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3213)
[ 14.123633][ T12] #1: b118df20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3214)
[ 14.124528][ T12] #2: c9fe045c (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net (net/core/net_namespace.c:665)
[ 14.125358][ T12] #3: c9fe21d8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock (net/core/rtnetlink.c:81)
[ 14.126101][ T12]
[ 14.126101][ T12] stack backtrace:
[ 14.126679][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.16.0-rc2-00006-ge6ec2411d37d #1 PREEMPT(full) 310c9b7a074c96d55fc763e6a813380c418d9d51
[ 14.126686][ T12] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 14.126689][ T12] Workqueue: netns cleanup_net
[ 14.126697][ T12] Call Trace:
[ 14.126701][ T12] dump_stack_lvl (lib/dump_stack.c:123)
[ 14.126707][ T12] dump_stack (lib/dump_stack.c:130)
[ 14.126711][ T12] print_circular_bug (kernel/locking/lockdep.c:2048)
[ 14.126717][ T12] check_noncircular (kernel/locking/lockdep.c:2178)
[ 14.126722][ T12] ? add_chain_block (kernel/locking/lockdep.c:3445)
[ 14.126731][ T12] check_prev_add (kernel/locking/lockdep.c:3169)
[ 14.126736][ T12] validate_chain (kernel/locking/lockdep.c:3288 kernel/locking/lockdep.c:3911)
[ 14.126742][ T12] __lock_acquire (kernel/locking/lockdep.c:5240)
[ 14.126746][ T12] ? find_held_lock (kernel/locking/lockdep.c:5353)
[ 14.126754][ T12] ? unregister_netdevice_many_notify (include/linux/find.h:67 net/core/dev.c:6354 net/core/dev.c:12056)
[ 14.126761][ T12] lock_acquire (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873 kernel/locking/lockdep.c:5828)
[ 14.126765][ T12] ? unregister_netdevice_many_notify (include/linux/find.h:67 net/core/dev.c:6354 net/core/dev.c:12056)
[ 14.126771][ T12] ? lock_is_held (include/linux/lockdep.h:250)
[ 14.126779][ T12] cpus_read_lock (arch/x86/include/asm/preempt.h:80 include/linux/percpu-rwsem.h:55 include/linux/percpu-rwsem.h:77 kernel/cpu.c:490)
[ 14.126785][ T12] ? unregister_netdevice_many_notify (include/linux/find.h:67 net/core/dev.c:6354 net/core/dev.c:12056)
[ 14.126790][ T12] unregister_netdevice_many_notify (include/linux/find.h:67 net/core/dev.c:6354 net/core/dev.c:12056)
[ 14.126794][ T12] ? __mutex_lock (arch/x86/include/asm/preempt.h:95 kernel/locking/mutex.c:612 kernel/locking/mutex.c:747)
[ 14.126801][ T12] ? lock_is_held_type (kernel/locking/lockdep.c:5604 kernel/locking/lockdep.c:5943)
[ 14.126807][ T12] ? mutex_is_locked (kernel/locking/mutex.c:68)
[ 14.126811][ T12] ? list_add_tail (include/linux/list.h:83 include/linux/list.h:150 include/linux/list.h:183)
[ 14.126815][ T12] ? unregister_netdevice_queue (include/linux/list.h:312 net/core/dev.c:11979)
[ 14.126821][ T12] unregister_netdevice_many (net/core/dev.c:12141)
[ 14.126825][ T12] default_device_exit_batch (net/core/dev.c:12645)
[ 14.126831][ T12] ops_undo_list (net/core/net_namespace.c:206 net/core/net_namespace.c:253)
[ 14.126838][ T12] cleanup_net (net/core/net_namespace.c:688)
[ 14.126844][ T12] process_one_work (kernel/workqueue.c:3243)
[ 14.126853][ T12] process_scheduled_works (kernel/workqueue.c:3321)
[ 14.126858][ T12] worker_thread (include/linux/list.h:373 kernel/workqueue.c:946 kernel/workqueue.c:3403)
[ 14.126863][ T12] kthread (kernel/kthread.c:466)
[ 14.126869][ T12] ? drain_dead_softirq_workfn (kernel/workqueue.c:3348)
[ 14.126874][ T12] ? kthread_is_per_cpu (kernel/kthread.c:413)
[ 14.126878][ T12] ret_from_fork (arch/x86/kernel/process.c:154)
[ 14.126883][ T12] ? kthread_is_per_cpu (kernel/kthread.c:413)
[ 14.126888][ T12] ret_from_fork_asm (arch/x86/entry/entry_32.S:737)
[ 14.126894][ T12] entry_INT80_32 (arch/x86/entry/entry_32.S:945)
[ OK ] Started User Login Management.
Starting LSB: Load kernel image with kexec...
Starting Raise network interfaces...
[ OK ] Started LSB: Load kernel image with kexec.
[ OK ] Finished Raise network interfaces.
[ OK ] Reached target Network.
Starting LKP bootstrap...
Starting /etc/rc.local Compatibility...
Starting OpenBSD Secure Shell server...
Starting Permit User Sessions...
[ 14.279154] rc.local[230]: PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/lkp/lkp/src/bin
[ OK ] Started /etc/rc.local Compatibility.
LKP: ttyS0: 230: skip deploy intel ucode as no ucode is specified
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250630/202506300421.acdd1f02-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2025-06-30 2:49 UTC|newest]
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