====================================== | [ 57.292317][ C2] 1 lock held by swapper/2/0: | [ 57.292502][ C2] #0: ffffc90000238ae8 ((&n->timer)){+.-.}-{0:0}, at: call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) | [ 57.292822][ C2] | [ 57.292822][ C2] stack backtrace: [ 57.293045][ C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 57.293049][ C2] Call Trace: [ 57.293051][ C2] [ 57.293056][ C2] dump_stack_lvl (lib/dump_stack.c:123) [ 57.293065][ C2] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848) [ 57.293075][ C2] __icmp_send (./include/net/net_namespace.h:404 ./include/linux/netdevice.h:2669 net/ipv4/icmp.c:616) [ 57.293090][ C2] ? __pfx___icmp_send (net/ipv4/icmp.c:596) [ 57.293096][ C2] ? __lock_release (kernel/locking/lockdep.c:5527) [ 57.293101][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) [ 57.293105][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) [ 57.293113][ C2] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) [ 57.293119][ C2] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) [ 57.293130][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3862) [ 57.293134][ C2] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:230) [ 57.293138][ C2] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) [ 57.293147][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5228) [ 57.293159][ C2] ipv4_send_dest_unreach (net/ipv4/route.c:1241) [ 57.293165][ C2] ? neigh_invalidate (net/core/neighbour.c:1008) [ 57.293170][ C2] ? __pfx_ipv4_send_dest_unreach (net/ipv4/route.c:1215) [ 57.293183][ C2] ipv4_link_failure (./include/linux/skbuff.h:1152 ./include/net/route.h:88 net/ipv4/route.c:1250) [ 57.293188][ C2] arp_error_report (./include/net/dst.h:429 net/ipv4/arp.c:296) [ 57.293195][ C2] neigh_invalidate (net/core/neighbour.c:1008) [ 57.293204][ C2] neigh_timer_handler (net/core/neighbour.c:1109 (discriminator 2)) [ 57.293214][ C2] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) [ 57.293217][ C2] call_timer_fn (kernel/time/timer.c:1789) [ 57.293220][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) [ 57.293223][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) [ 57.293227][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1766) [ 57.293229][ C2] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) [ 57.293247][ C2] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414) [ 57.293250][ C2] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) [ 57.293261][ C2] ? __pfx___run_timers (kernel/time/timer.c:2385) [ 57.293264][ C2] ? __lock_release (kernel/locking/lockdep.c:5527) [ 57.293271][ C2] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) [ 57.293277][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 57.293282][ C2] ? lock_acquire (kernel/locking/lockdep.c:5824) [ 57.293285][ C2] ? timer_expire_remote (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2177) [ 57.293295][ C2] timer_expire_remote (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2177) [ 57.293299][ C2] tmigr_handle_remote_cpu (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:87 ./arch/x86/include/asm/irqflags.h:147 kernel/time/timer_migration.c:961) [ 57.293307][ C2] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:905) [ 57.293310][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) [ 57.293313][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) [ 57.293332][ C2] tmigr_handle_remote_up (kernel/time/timer_migration.c:1038) [ 57.293338][ C2] ? __pfx_tmigr_handle_remote_up (kernel/time/timer_migration.c:1005) [ 57.293343][ C2] __walk_groups.isra.0 (kernel/time/timer_migration.c:533) [ 57.293353][ C2] tmigr_handle_remote (kernel/time/timer_migration.c:1096) [ 57.293357][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1059) [ 57.293360][ C2] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) [ 57.293367][ C2] ? ktime_get (kernel/time/timekeeping.c:226 (discriminator 4) kernel/time/timekeeping.c:335 (discriminator 4) kernel/time/timekeeping.c:752 (discriminator 4)) [ 57.293375][ C2] ? clockevents_program_event (kernel/time/clockevents.c:334 (discriminator 3)) [ 57.293390][ C2] handle_softirqs (kernel/softirq.c:561) [ 57.293402][ C2] __irq_exit_rcu (kernel/softirq.c:596 kernel/softirq.c:435 kernel/softirq.c:662) [ 57.293405][ C2] irq_exit_rcu (kernel/softirq.c:680) [ 57.293408][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) [ 57.293413][ C2] [ 57.293414][ C2] [ 57.293416][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) [ 57.293421][ C2] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/kernel/process.c:744) [ 57.293425][ C2] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 cc 14 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 All code ======== 0: 4c 01 c7 add %r8,%rdi 3: 4c 29 c2 sub %r8,%rdx 6: e9 72 ff ff ff jmp 0xffffffffffffff7d b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: f3 0f 1e fa endbr64 1f: 66 90 xchg %ax,%ax 21: 0f 00 2d 23 cc 14 00 verw 0x14cc23(%rip) # 0x14cc4b 28: fb sti 29: f4 hlt 2a:* fa cli <-- trapping instruction 2b: c3 ret 2c: cc int3 2d: cc int3 2e: cc int3 2f: cc int3 30: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 37: 00 00 00 00 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop Code starting with the faulting instruction =========================================== 0: fa cli 1: c3 ret 2: cc int3 3: cc int3 4: cc int3 5: cc int3 6: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) d: 00 00 00 00 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop [ 57.293428][ C2] RSP: 0018:ffffc90000167df8 EFLAGS: 00000242 [ 57.293431][ C2] RAX: 0000000000128dfd RBX: 1ffff9200002cfc1 RCX: ffffffff90914b15 [ 57.293433][ C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e169634 [ 57.293436][ C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2703a [ 57.293437][ C2] R10: ffff8880361381d3 R11: ffff888001b38040 R12: 0000000000000000 [ 57.293439][ C2] R13: ffff888001b38040 R14: dffffc0000000000 R15: 0000000000000000 [ 57.293449][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) [ 57.293453][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) [ 57.293462][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) [ 57.293465][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) [ 57.293470][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) [ 57.293477][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) [ 57.293487][ C2] do_idle (kernel/sched/idle.c:325) [ 57.293493][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) [ 57.293498][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) [ 57.293502][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) Finger prints: lockdep_rcu_suspicious:__icmp_send:ipv4_send_dest_unreach:ipv4_link_failure:arp_error_report