======================================
| [ 965.493753][ C0] 1 lock held by swapper/0/0:
| [ 965.493969][ C0] #0: ffffc90000007d60 ((&n->timer)){+.-.}-{0:0}, at: call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779)
| [ 965.494381][ C0]
| [ 965.494381][ C0] stack backtrace:
[ 965.494676][ C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 965.494678][ C0] Call Trace:
[ 965.494680][ C0] <IRQ>
[ 965.494682][ C0] dump_stack_lvl (lib/dump_stack.c:123)
[ 965.494691][ C0] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848)
[ 965.494702][ C0] __icmp_send (./include/net/net_namespace.h:404 ./include/linux/netdevice.h:2669 net/ipv4/icmp.c:616)
[ 965.494712][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4323)
[ 965.494720][ C0] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4341 kernel/locking/lockdep.c:4408)
[ 965.494725][ C0] ? __pfx___icmp_send (net/ipv4/icmp.c:596)
[ 965.494732][ C0] ? __kfree_skb (net/core/skbuff.c:1189 net/core/skbuff.c:1204)
[ 965.494740][ C0] ? mptcp_sendmsg_frag (net/mptcp/protocol.c:1319)
[ 965.494752][ C0] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[ 965.494760][ C0] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874)
[ 965.494772][ C0] ? __pfx_validate_chain (kernel/locking/lockdep.c:3862)
[ 965.494777][ C0] ? 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)
[ 965.494780][ C0] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3))
[ 965.494790][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5228)
[ 965.494799][ C0] ipv4_send_dest_unreach (net/ipv4/route.c:1241)
[ 965.494808][ C0] ? neigh_invalidate (net/core/neighbour.c:1008)
[ 965.494815][ C0] ? __pfx_ipv4_send_dest_unreach (net/ipv4/route.c:1215)
[ 965.494829][ C0] ipv4_link_failure (./include/linux/skbuff.h:1152 ./include/net/route.h:88 net/ipv4/route.c:1250)
[ 965.494835][ C0] arp_error_report (./include/net/dst.h:429 net/ipv4/arp.c:296)
[ 965.494842][ C0] neigh_invalidate (net/core/neighbour.c:1008)
[ 965.494852][ C0] neigh_timer_handler (net/core/neighbour.c:1109 (discriminator 2))
[ 965.494862][ C0] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032)
[ 965.494866][ C0] call_timer_fn (kernel/time/timer.c:1789)
[ 965.494869][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779)
[ 965.494872][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779)
[ 965.494876][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1766)
[ 965.494879][ C0] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3))
[ 965.494897][ C0] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414)
[ 965.494903][ C0] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032)
[ 965.494913][ C0] ? __pfx___run_timers (kernel/time/timer.c:2385)
[ 965.494916][ C0] ? clockevents_program_event (kernel/time/clockevents.c:326)
[ 965.494925][ C0] ? 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)
[ 965.494930][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 965.494934][ C0] ? lock_acquire (kernel/locking/lockdep.c:5824)
[ 965.494936][ C0] ? run_timer_softirq (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445)
[ 965.494946][ C0] run_timer_softirq (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445)
[ 965.494951][ C0] handle_softirqs (kernel/softirq.c:561)
[ 965.494966][ C0] __irq_exit_rcu (kernel/softirq.c:596 kernel/softirq.c:435 kernel/softirq.c:662)
[ 965.494970][ C0] irq_exit_rcu (kernel/softirq.c:680)
[ 965.494973][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049)
[ 965.494977][ C0] </IRQ>
[ 965.494978][ C0] <TASK>
[ 965.494980][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702)
[ 965.494986][ C0] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/kernel/process.c:744)
[ 965.494990][ C0] 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 8c 0a 00 fb f4 <fa> 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 8c 0a 00 verw 0xa8c23(%rip) # 0xa8c4b
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
[ 965.494992][ C0] RSP: 0018:ffffffff8e207e00 EFLAGS: 00000246
[ 965.494995][ C0] RAX: 0000000001763509 RBX: 1ffffffff1c40fc2 RCX: ffffffff8d5b8b15
[ 965.494997][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8ad6a634
[ 965.494999][ C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0703a
[ 965.495000][ C0] R10: ffff8880360381d3 R11: ffffffff8e240fc0 R12: 0000000000000000
[ 965.495002][ C0] R13: ffffffff8e240fc0 R14: dffffc0000000000 R15: 0000000000014770
[ 965.495011][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147)
[ 965.495016][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186)
[ 965.495024][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118)
[ 965.495027][ C0] cpuidle_idle_call (kernel/sched/idle.c:186)
[ 965.495031][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168)
[ 965.495037][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59)
[ 965.495050][ C0] do_idle (kernel/sched/idle.c:325)
[ 965.495056][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1))
[ 965.495060][ C0] rest_init (./include/linux/rcupdate.h:850 init/main.c:714)
[ 965.495066][ C0] start_kernel (init/main.c:1049 (discriminator 1))
[ 965.495073][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:503)
[ 965.495077][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:445 (discriminator 17))
Finger prints:
lockdep_rcu_suspicious:__icmp_send:ipv4_send_dest_unreach:ipv4_link_failure:arp_error_report