====================================== | [ 44.893445][ C1] common_startup_64 (arch/x86/kernel/head_64.S:421) | [ 44.893585][ C1] | [ 44.893652][ C1] | [ 44.893652][ C1] stack backtrace: [ 44.894023][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 44.894316][ C1] Call Trace: [ 44.894423][ C1] [ 44.894511][ C1] dump_stack_lvl (lib/dump_stack.c:117) [ 44.894707][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 44.894973][ C1] ? common_startup_64 (arch/x86/kernel/head_64.S:421) [ 44.895122][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 44.895304][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 44.895448][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 44.895596][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) [ 44.895742][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244) [ 44.895888][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) [ 44.896040][ C1] ? stack_trace_save (kernel/stacktrace.c:123) [ 44.896192][ C1] ? save_trace (kernel/locking/lockdep.c:586) [ 44.896345][ C1] mark_lock (kernel/locking/lockdep.c:4678) [ 44.896455][ C1] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 44.896603][ C1] mark_usage (kernel/locking/lockdep.c:4567) [ 44.896713][ C1] __lock_acquire (kernel/locking/lockdep.c:5091) [ 44.896940][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 44.897087][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 44.897345][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 44.897497][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.897793][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 44.897940][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 44.898085][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.898306][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 44.898534][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.898755][ C1] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 44.898901][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.899192][ C1] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.899406][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 44.899656][ C1] call_timer_fn (kernel/time/timer.c:1793) [ 44.899800][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 44.900022][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 44.900164][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) [ 44.900313][ C1] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 44.900427][ C1] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) [ 44.900572][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 44.900825][ C1] ? __pfx___run_timers (kernel/time/timer.c:2389) [ 44.900967][ C1] ? trace_rcu_dyntick (./include/trace/events/rcu.h:480 (discriminator 52)) [ 44.901114][ C1] ? 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) [ 44.901261][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 44.901412][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 44.901559][ C1] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) [ 44.901707][ C1] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) [ 44.901931][ C1] __do_softirq (kernel/softirq.c:554) [ 44.902074][ C1] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) [ 44.902185][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) [ 44.902329][ C1] [ 44.902405][ C1] [ 44.902494][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) [ 44.902761][ C1] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:72 arch/x86/kernel/process.c:743) [ 44.902919][ C1] 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 93 20 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 93 20 35 00 verw 0x352093(%rip) # 0x3520bb 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 [ 44.903513][ C1] RSP: 0018:ffffc9000014fdf8 EFLAGS: 00000242 [ 44.903700][ C1] RAX: 0000000000095615 RBX: 1ffff92000029fc1 RCX: ffffffff9ad0f9e5 [ 44.903914][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff986aa4a4 [ 44.904213][ C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005f1709c [ 44.904428][ C1] R10: ffff88802f8b84e3 R11: ffff88802f8ad9b0 R12: 0000000000000000 [ 44.904643][ C1] R13: ffff888001b7a300 R14: dffffc0000000000 R15: 0000000000000000 [ 44.904941][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) [ 44.905083][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:192) [ 44.905234][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) [ 44.905456][ C1] cpuidle_idle_call (kernel/sched/idle.c:192) [ 44.905602][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) [ 44.905750][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) [ 44.905898][ C1] do_idle (kernel/sched/idle.c:332) [ 44.906009][ C1] cpu_startup_entry (kernel/sched/idle.c:429 (discriminator 1)) [ 44.906229][ C1] start_secondary (arch/x86/kernel/smpboot.c:201 arch/x86/kernel/smpboot.c:281) [ 44.906375][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:231) Finger prints: common_startup_64:dump_stack_lvl:mark_lock_irq:mark_lock