====================================== | [ 15.199248][ C2] 1 lock held by ksoftirqd/2/27: | [ 15.199422][ C2] #0: ffffffffa91749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) | [ 15.199736][ C2] | [ 15.199736][ C2] stack backtrace: [ 15.199953][ C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.199955][ C2] Call Trace: [ 15.199957][ C2] [ 15.199959][ C2] dump_stack_lvl (lib/dump_stack.c:123) [ 15.199966][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) [ 15.199971][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) [ 15.199976][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) [ 15.199983][ C2] ? save_trace (kernel/locking/lockdep.c:594) [ 15.199988][ C2] mark_lock (kernel/locking/lockdep.c:4754) [ 15.199992][ C2] mark_usage (kernel/locking/lockdep.c:4643) [ 15.199996][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) [ 15.200002][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) [ 15.200004][ C2] ? simple_pin_fs (fs/libfs.c:1066) [ 15.200007][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 15.200015][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) [ 15.200017][ C2] ? simple_pin_fs (fs/libfs.c:1066) [ 15.200021][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 15.200024][ C2] ? simple_pin_fs (fs/libfs.c:1066) [ 15.200026][ C2] simple_pin_fs (fs/libfs.c:1066) [ 15.200029][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) [ 15.200032][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) [ 15.200039][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) [ 15.200042][ C2] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2366) [ 15.200049][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) [ 15.200053][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) [ 15.200055][ C2] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) [ 15.200061][ C2] ? kthread (kernel/kthread.c:464) [ 15.200067][ C2] ? ret_from_fork (arch/x86/kernel/process.c:153) [ 15.200069][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) [ 15.200072][ C2] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2417) [ 15.200076][ C2] ? __pfx_migrate_enable (kernel/sched/core.c:2392) [ 15.200082][ C2] __put_net (net/core/net_namespace.c:732) [ 15.200086][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) [ 15.200091][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) [ 15.200094][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) [ 15.200099][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) [ 15.200103][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 15.200106][ C2] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1)) [ 15.200110][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) [ 15.200116][ C2] rcu_core (kernel/rcu/tree.c:2826) [ 15.200119][ C2] handle_softirqs (kernel/softirq.c:579) [ 15.200123][ C2] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) [ 15.200126][ C2] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) [ 15.200128][ C2] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) [ 15.200132][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) [ 15.200135][ C2] kthread (kernel/kthread.c:464) [ 15.200139][ C2] ? __pfx_kthread (kernel/kthread.c:413) [ 15.200142][ C2] ? ret_from_fork (arch/x86/kernel/process.c:152) [ 15.200144][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) [ 15.200146][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 15.200150][ C2] ? __pfx_kthread (kernel/kthread.c:413) [ 15.200154][ C2] ret_from_fork (arch/x86/kernel/process.c:153) [ 15.200156][ C2] ? __pfx_kthread (kernel/kthread.c:413) [ 15.200159][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) | [ 15.210506][ C2] RCU nest depth: 0, expected: 0 | [ 15.210680][ C2] INFO: lockdep is turned off. | [ 15.210864][ C2] Preemption disabled at: | [ 15.210866][ C2] handle_softirqs (kernel/softirq.c:553) [ 15.211218][ C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.211219][ C2] Call Trace: [ 15.211221][ C2] [ 15.211223][ C2] dump_stack_lvl (lib/dump_stack.c:123) [ 15.211228][ C2] __might_resched (kernel/sched/core.c:8819) [ 15.211235][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) [ 15.211239][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) [ 15.211242][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) [ 15.211246][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 15.211252][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) [ 15.211257][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) [ 15.211260][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) [ 15.211263][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) [ 15.211268][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) [ 15.211271][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) [ 15.211275][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) [ 15.211278][ C2] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2366) [ 15.211283][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) [ 15.211286][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) [ 15.211289][ C2] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) [ 15.211292][ C2] ? kthread (kernel/kthread.c:464) [ 15.211296][ C2] ? ret_from_fork (arch/x86/kernel/process.c:153) [ 15.211299][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) [ 15.211302][ C2] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2417) [ 15.211307][ C2] ? __pfx_migrate_enable (kernel/sched/core.c:2392) [ 15.211312][ C2] __put_net (net/core/net_namespace.c:732) [ 15.211316][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) [ 15.211319][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) [ 15.211323][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) [ 15.211328][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) [ 15.211332][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 15.211335][ C2] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1)) [ 15.211339][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) [ 15.211345][ C2] rcu_core (kernel/rcu/tree.c:2826) [ 15.211348][ C2] handle_softirqs (kernel/softirq.c:579) [ 15.211351][ C2] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) [ 15.211355][ C2] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) [ 15.211357][ C2] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) [ 15.211360][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) [ 15.211364][ C2] kthread (kernel/kthread.c:464) [ 15.211367][ C2] ? __pfx_kthread (kernel/kthread.c:413) [ 15.211370][ C2] ? ret_from_fork (arch/x86/kernel/process.c:152) [ 15.211372][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) [ 15.211375][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 15.211379][ C2] ? __pfx_kthread (kernel/kthread.c:413) [ 15.211382][ C2] ret_from_fork (arch/x86/kernel/process.c:153) [ 15.211384][ C2] ? __pfx_kthread (kernel/kthread.c:413) [ 15.211387][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) | [ 16.878489][ C3] INFO: lockdep is turned off. | [ 16.878662][ C3] Preemption disabled at: | [ 16.878664][ C3] copy_fpstate_to_sigframe (./include/linux/instrumented.h:68 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/linux/thread_info.h:126 arch/x86/kernel/fpu/signal.c:223) | [ 16.879083][ C3] Tainted: [W]=WARN [ 16.879084][ C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.879086][ C3] Call Trace: [ 16.879088][ C3] [ 16.879090][ C3] dump_stack_lvl (lib/dump_stack.c:123) [ 16.879097][ C3] __might_resched (kernel/sched/core.c:8819) [ 16.879103][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) [ 16.879107][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) [ 16.879111][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) [ 16.879115][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 16.879121][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) [ 16.879127][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) [ 16.879130][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) [ 16.879135][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) [ 16.879139][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) [ 16.879143][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) [ 16.879147][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) [ 16.879150][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2366) [ 16.879155][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) [ 16.879160][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) [ 16.879163][ C3] ? __local_bh_enable_ip (kernel/softirq.c:407) [ 16.879166][ C3] ? copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:231) [ 16.879170][ C3] ? get_sigframe (arch/x86/kernel/signal.c:163) [ 16.879176][ C3] ? x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) [ 16.879179][ C3] ? handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) [ 16.879182][ C3] ? arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) [ 16.879185][ C3] ? syscall_exit_to_user_mode (kernel/entry/common.c:113 ./include/linux/entry-common.h:329 kernel/entry/common.c:207 kernel/entry/common.c:218) [ 16.879190][ C3] ? do_syscall_64 (arch/x86/entry/syscall_64.c:113) [ 16.879193][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 16.879198][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) [ 16.879203][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 16.879208][ C3] __put_net (net/core/net_namespace.c:732) [ 16.879212][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) [ 16.879216][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) [ 16.879219][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) [ 16.879224][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) [ 16.879228][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 16.879231][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) [ 16.879237][ C3] rcu_core (kernel/rcu/tree.c:2826) [ 16.879241][ C3] handle_softirqs (kernel/softirq.c:579) [ 16.879245][ C3] ? copy_fpstate_to_sigframe (./include/linux/bottom_half.h:33 ./arch/x86/include/asm/fpu/api.h:77 arch/x86/kernel/fpu/signal.c:229) [ 16.879249][ C3] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) [ 16.879251][ C3] [ 16.879253][ C3] [ 16.879254][ C3] __local_bh_enable_ip (kernel/softirq.c:407) [ 16.879257][ C3] copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:231) [ 16.879263][ C3] get_sigframe (arch/x86/kernel/signal.c:163) [ 16.879265][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) [ 16.879269][ C3] ? __pfx_get_sigframe (arch/x86/kernel/signal.c:96) [ 16.879273][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 16.879277][ C3] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) [ 16.879286][ C3] x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) [ 16.879290][ C3] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) [ 16.879294][ C3] ? __pfx_x64_setup_rt_frame (arch/x86/kernel/signal_64.c:165) [ 16.879298][ C3] ? __pfx___schedule (kernel/sched/core.c:6646) [ 16.879304][ C3] handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) [ 16.879308][ C3] arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) [ 16.879311][ C3] ? __pfx_arch_do_signal_or_restart (arch/x86/kernel/signal.c:334) [ 16.879317][ C3] ? __x64_sys_rt_sigsuspend (kernel/signal.c:4858 kernel/signal.c:4848 kernel/signal.c:4848) [ 16.879323][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) [ 16.879328][ C3] syscall_exit_to_user_mode (kernel/entry/common.c:113 ./include/linux/entry-common.h:329 kernel/entry/common.c:207 kernel/entry/common.c:218) [ 16.879332][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:113) [ 16.879336][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 16.879338][ C3] RIP: 0033:0x7f26d9c3106c [ 16.879345][ C3] Code: Unable to access opcode bytes at 0x7f26d9c31042. Code starting with the faulting instruction =========================================== [ 16.879347][ C3] RSP: 002b:00007ffccd571288 EFLAGS: 00000246 ORIG_RAX: 0000000000000082 [ 16.879350][ C3] RAX: fffffffffffffffc RBX: 00007ffccd5712c8 RCX: 00007f26d9c3106c [ 16.879353][ C3] RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00007ffccd5712f0 [ 16.879354][ C3] RBP: 00007ffccd571370 R08: 00007ffccd571370 R09: 0000000000000000 [ 16.879356][ C3] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffccd5712f0 Finger prints: copy_fpstate_to_sigframe:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal