====================================== | [ 43.857062][ C2] common_startup_64 (arch/x86/kernel/head_64.S:421) | [ 43.857201][ C2] | [ 43.857270][ C2] | [ 43.857270][ C2] stack backtrace: [ 43.857728][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 43.858029][ C2] Call Trace: [ 43.858132][ C2] [ 43.858287][ C2] dump_stack_lvl (lib/dump_stack.c:117) [ 43.858431][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 43.858601][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:421) [ 43.858739][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 43.858992][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 43.859129][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 43.859265][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) [ 43.859403][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) [ 43.859621][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) [ 43.859757][ C2] ? stack_trace_save (kernel/stacktrace.c:123) [ 43.859895][ C2] ? add_chain_cache (kernel/locking/lockdep.c:3730) [ 43.860033][ C2] ? save_trace (kernel/locking/lockdep.c:586) [ 43.860255][ C2] mark_lock (kernel/locking/lockdep.c:4678) [ 43.860360][ C2] mark_usage (kernel/locking/lockdep.c:4567) [ 43.860463][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) [ 43.860600][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 43.860738][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 43.861057][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 43.861196][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 43.861405][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 43.861553][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 43.861788][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 43.861995][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 43.862130][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 43.862416][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 43.862553][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 43.862757][ C2] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 43.862973][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 43.863303][ C2] call_timer_fn (kernel/time/timer.c:1793) [ 43.863441][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 43.863578][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 43.863714][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) [ 43.863930][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 43.864037][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) [ 43.864187][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 43.864427][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) [ 43.864645][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) [ 43.864781][ 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) [ 43.864922][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 43.865059][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 43.865276][ C2] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181) [ 43.865413][ C2] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181) [ 43.865554][ 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) [ 43.865692][ C2] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869) [ 43.866026][ C2] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003) [ 43.866167][ C2] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061) [ 43.866304][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) [ 43.866452][ C2] __do_softirq (kernel/softirq.c:554) [ 43.866670][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) [ 43.866779][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) [ 43.866924][ C2] [ 43.866997][ C2] [ 43.867066][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) [ 43.867237][ 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) [ 43.867470][ 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 [ 43.868045][ C2] RSP: 0018:ffffc9000015fdf8 EFLAGS: 00000246 [ 43.868230][ C2] RAX: 00000000000e7f03 RBX: 1ffff9200002bfc1 RCX: ffffffff8930e9d5 [ 43.868442][ C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff86caa4a4 [ 43.868728][ C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005f2709c [ 43.868937][ C2] R10: ffff88802f9384e3 R11: ffff88802f92d9b0 R12: 0000000000000000 [ 43.869140][ C2] R13: ffff888001b7c5c0 R14: dffffc0000000000 R15: 0000000000000000 [ 43.869432][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) [ 43.869569][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:192) [ 43.869705][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) [ 43.869841][ C2] cpuidle_idle_call (kernel/sched/idle.c:192) [ 43.870067][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) [ 43.870207][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) [ 43.870346][ C2] do_idle (kernel/sched/idle.c:332) [ 43.870461][ C2] cpu_startup_entry (kernel/sched/idle.c:429 (discriminator 1)) [ 43.870597][ C2] start_secondary (arch/x86/kernel/smpboot.c:201 arch/x86/kernel/smpboot.c:281) [ 43.870815][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:231) Finger prints: common_startup_64:dump_stack_lvl:mark_lock_irq:mark_lock