====================================== | [ 44.873190][ C2] common_startup_64 (arch/x86/kernel/head_64.S:421) | [ 44.873323][ C2] | [ 44.873391][ C2] | [ 44.873391][ C2] stack backtrace: [ 44.873769][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 44.874065][ C2] Call Trace: [ 44.874169][ C2] <IRQ> [ 44.874245][ C2] dump_stack_lvl (lib/dump_stack.c:117) [ 44.874387][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 44.874554][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:421) [ 44.874693][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 44.874864][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 44.874998][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 44.875130][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) [ 44.875265][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) [ 44.875404][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) [ 44.875540][ C2] ? stack_trace_save (kernel/stacktrace.c:123) [ 44.875678][ C2] ? add_chain_cache (kernel/locking/lockdep.c:3730) [ 44.875820][ C2] ? save_trace (kernel/locking/lockdep.c:586) [ 44.876037][ C2] mark_lock (kernel/locking/lockdep.c:4678) [ 44.876141][ C2] mark_usage (kernel/locking/lockdep.c:4567) [ 44.876250][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) [ 44.876385][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 44.876521][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 44.876851][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 44.876986][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.877194][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 44.877334][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 44.877472][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.877684][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 44.877818][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.878116][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 44.878252][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.878454][ C2] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.878659][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 44.878971][ C2] call_timer_fn (kernel/time/timer.c:1793) [ 44.879105][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 44.879244][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 44.879381][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) [ 44.879597][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 44.879707][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) [ 44.879846][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 44.880098][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) [ 44.880318][ 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) [ 44.880454][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 44.880602][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 44.880741][ C2] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) [ 44.880978][ C2] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) [ 44.881116][ C2] __do_softirq (kernel/softirq.c:554) [ 44.881253][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) [ 44.881356][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) [ 44.881574][ C2] </IRQ> [ 44.881649][ C2] <TASK> [ 44.881728][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) [ 44.881901][ 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) [ 44.882059][ 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 93 20 35 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 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 [ 44.882623][ C2] RSP: 0018:ffffc9000015fdf8 EFLAGS: 00000242 [ 44.882797][ C2] RAX: 0000000000147b07 RBX: 1ffff9200002bfc1 RCX: ffffffff9670f9e5 [ 44.883083][ C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff940aa4a4 [ 44.883290][ C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005f2709c [ 44.883493][ C2] R10: ffff88802f9384e3 R11: ffff88802f93dc80 R12: 0000000000000000 [ 44.883778][ C2] R13: ffff888001b7c5c0 R14: dffffc0000000000 R15: 0000000000000000 [ 44.883981][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) [ 44.884117][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:192) [ 44.884339][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) [ 44.884472][ C2] cpuidle_idle_call (kernel/sched/idle.c:192) [ 44.884610][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) [ 44.884753][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) [ 44.884967][ C2] do_idle (kernel/sched/idle.c:332) [ 44.885068][ C2] cpu_startup_entry (kernel/sched/idle.c:429 (discriminator 1)) [ 44.885201][ C2] start_secondary (arch/x86/kernel/smpboot.c:201 arch/x86/kernel/smpboot.c:281) [ 44.885336][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:231) Finger prints: common_startup_64:dump_stack_lvl:mark_lock_irq:mark_lock