====================================== | [ 47.440615][ C2] common_startup_64 (arch/x86/kernel/head_64.S:421) | [ 47.440759][ C2] | [ 47.440835][ C2] | [ 47.440835][ C2] stack backtrace: [ 47.441223][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 47.441540][ C2] Call Trace: [ 47.441645][ C2] [ 47.441844][ C2] dump_stack_lvl (lib/dump_stack.c:117) [ 47.441998][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 47.442175][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:421) [ 47.442313][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 47.442495][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 47.442636][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 47.442779][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) [ 47.442923][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) [ 47.443062][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) [ 47.443205][ C2] ? stack_trace_save (kernel/stacktrace.c:123) [ 47.443352][ C2] ? add_chain_cache (kernel/locking/lockdep.c:3730) [ 47.443490][ C2] ? save_trace (kernel/locking/lockdep.c:586) [ 47.443635][ C2] mark_lock (kernel/locking/lockdep.c:4678) [ 47.443837][ C2] mark_usage (kernel/locking/lockdep.c:4567) [ 47.443944][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) [ 47.444085][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 47.444222][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 47.444546][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 47.444683][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 47.444903][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 47.445050][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 47.445353][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 47.445564][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 47.445701][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 47.445913][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 47.446136][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 47.446348][ C2] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 47.446564][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 47.446942][ C2] call_timer_fn (kernel/time/timer.c:1793) [ 47.447084][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 47.447221][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 47.447360][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) [ 47.447503][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 47.447610][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) [ 47.447752][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 47.448014][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) [ 47.448151][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) [ 47.448293][ C2] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:115 ./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) [ 47.448431][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 47.448572][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 47.448829][ C2] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181) [ 47.448989][ C2] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181) [ 47.449127][ C2] tmigr_handle_remote_cpu (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:67 ./arch/x86/include/asm/irqflags.h:127 kernel/time/timer_migration.c:925) [ 47.449276][ C2] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869) [ 47.449447][ C2] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003) [ 47.449586][ C2] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061) [ 47.449722][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) [ 47.449869][ C2] __do_softirq (kernel/softirq.c:554) [ 47.450009][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) [ 47.450112][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) [ 47.450249][ C2] [ 47.450324][ C2] [ 47.450404][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) [ 47.450575][ C2] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:72 arch/x86/kernel/process.c:743) [ 47.450808][ 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 a3 30 35 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 a3 30 35 00 verw 0x3530a3(%rip) # 0x3530cb 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 [ 47.451292][ C2] RSP: 0018:ffffc9000015fdf8 EFLAGS: 00000242 [ 47.451552][ C2] RAX: 0000000000119fbf RBX: 1ffff9200002bfc1 RCX: ffffffff83d0e9d5 [ 47.451771][ C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff816aa4a4 [ 47.451977][ C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2709c [ 47.452266][ C2] R10: ffff8880361384e3 R11: ffff88803612d9b0 R12: 0000000000000000 [ 47.452471][ C2] R13: ffff888001b7c5c0 R14: dffffc0000000000 R15: 0000000000000000 [ 47.452772][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) [ 47.452911][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:192) [ 47.453049][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) [ 47.453186][ C2] cpuidle_idle_call (kernel/sched/idle.c:192) [ 47.453323][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) [ 47.453540][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) [ 47.453677][ C2] do_idle (kernel/sched/idle.c:332) [ 47.453791][ C2] cpu_startup_entry (kernel/sched/idle.c:429 (discriminator 1)) [ 47.453934][ C2] start_secondary (arch/x86/kernel/smpboot.c:201 arch/x86/kernel/smpboot.c:281) [ 47.454155][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:231) Finger prints: common_startup_64:dump_stack_lvl:mark_lock_irq:mark_lock