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[ 35.414429][ T331] [ 35.414429][ T331] other info that might help us debug this: [ 35.414429][ T331] [ 35.415231][ T331] [ 35.415231][ T331] rcu_scheduler_active = 2, debug_locks = 1 [ 35.415867][ T331] 4 locks held by kworker/u8:1/331: [ 35.416277][ T331] #0: 83de38c4 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:?) [ 35.417037][ T331] #1: ed2b9f04 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:?) [ 35.417746][ T331] #2: 82eec22c (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net (net/core/net_namespace.c:583) [ 35.418427][ T331] #3: eaba3c70 (&dn->nodes_srcu){.+.+}-{0:0}, at: srcu_lock_acquire (include/linux/srcu.h:150) [ 35.419124][ T331] [ 35.419124][ T331] stack backtrace: [ 35.419618][ T331] CPU: 0 UID: 0 PID: 331 Comm: kworker/u8:1 Not tainted 6.11.0-11738-ge89c4c290236 #1 [ 35.420349][ T331] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 35.421318][ T331] Workqueue: netns cleanup_net [ 35.422067][ T331] Call Trace: [ 35.422612][ T331] dump_stack_lvl (lib/dump_stack.c:122) [ 35.423303][ T331] dump_stack (lib/dump_stack.c:129) [ 35.423991][ T331] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6803) [ 35.424808][ T331] dlm_midcomms_exit (fs/dlm/midcomms.c:?) [ 35.425565][ T331] dlm_net_exit (fs/dlm/config.c:70) [ 35.426219][ T331] cleanup_net (net/core/net_namespace.c:174 net/core/net_namespace.c:626) [ 35.426927][ T331] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67) [ 35.427809][ T331] process_one_work (kernel/workqueue.c:3234) [ 35.428581][ T331] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 35.429358][ T331] kthread (kernel/kthread.c:391) [ 35.430046][ T331] ? pr_cont_work (kernel/workqueue.c:3337) [ 35.430782][ T331] ? kthread_blkcg (kernel/kthread.c:342) [ 35.431480][ T331] ? kthread_blkcg (kernel/kthread.c:342) [ 35.432219][ T331] ret_from_fork (arch/x86/kernel/process.c:153) [ 35.432972][ T331] ret_from_fork_asm (??:?) [ 35.433732][ T331] entry_INT80_32 (init_task.c:?) [ 35.434945][ T331] [ 35.435452][ T331] ============================= [ 35.436245][ T331] WARNING: suspicious RCU usage [ 35.437033][ T331] 6.11.0-11738-ge89c4c290236 #1 Not tainted [ 35.440279][ T331] ----------------------------- [ 35.442812][ T331] fs/dlm/lowcomms.c:1961 RCU-list traversed in non-reader section!! [ 35.446360][ T331] [ 35.446360][ T331] other info that might help us debug this: [ 35.446360][ T331] [ 35.450959][ T331] [ 35.450959][ T331] rcu_scheduler_active = 2, debug_locks = 1 [ 35.454214][ T331] 4 locks held by kworker/u8:1/331: [ 35.456221][ T331] #0: 83de38c4 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:?) [ 35.459107][ T331] #1: ed2b9f04 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:?) [ 35.461940][ T331] #2: 82eec22c (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net (net/core/net_namespace.c:583) [ 35.464777][ T331] #3: eaba3afc (&dn->connections_srcu){.+.+}-{0:0}, at: srcu_lock_acquire (include/linux/srcu.h:150) [ 35.472495][ T331] [ 35.472495][ T331] stack backtrace: [ 35.473301][ T331] CPU: 0 UID: 0 PID: 331 Comm: kworker/u8:1 Not tainted 6.11.0-11738-ge89c4c290236 #1 [ 35.474444][ T331] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 35.475498][ T331] Workqueue: netns cleanup_net [ 35.475954][ T331] Call Trace: [ 35.476282][ T331] dump_stack_lvl (lib/dump_stack.c:122) [ 35.476700][ T331] dump_stack (lib/dump_stack.c:129) [ 35.477272][ T331] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6803) [ 35.478275][ T331] dlm_lowcomms_exit (fs/dlm/lowcomms.c:?) [ 35.479318][ T331] dlm_midcomms_exit (fs/dlm/midcomms.c:1186) [ 35.480266][ T331] dlm_net_exit (fs/dlm/config.c:70) [ 35.481123][ T331] cleanup_net (net/core/net_namespace.c:174 net/core/net_namespace.c:626) [ 35.481942][ T331] ? __this_cpu_preempt_check (lib/smp_processor_id.c:67) [ 35.482925][ T331] process_one_work (kernel/workqueue.c:3234) [ 35.483825][ T331] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 35.484571][ T331] kthread (kernel/kthread.c:391) [ 35.485382][ T331] ? pr_cont_work (kernel/workqueue.c:3337) [ 35.486288][ T331] ? kthread_blkcg (kernel/kthread.c:342) [ 35.487171][ T331] ? kthread_blkcg (kernel/kthread.c:342) [ 35.488014][ T331] ret_from_fork (arch/x86/kernel/process.c:153) [ 35.488786][ T331] ret_from_fork_asm (??:?) [ 35.489648][ T331] entry_INT80_32 (init_task.c:?) The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241011/202410111400.130b9d53-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki