====================================== | [ 50.939338][ C1] common_startup_64 (arch/x86/kernel/head_64.S:421) | [ 50.939553][ C1] | [ 50.939661][ C1] | [ 50.939661][ C1] stack backtrace: [ 50.940381][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 50.940855][ C1] Call Trace: [ 50.941164][ C1] [ 50.941277][ C1] dump_stack_lvl (lib/dump_stack.c:117) [ 50.941496][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 50.941761][ C1] ? common_startup_64 (arch/x86/kernel/head_64.S:421) [ 50.941976][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 50.942381][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 50.942595][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 50.942808][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) [ 50.943023][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244) [ 50.943385][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) [ 50.943599][ C1] ? stack_trace_save (kernel/stacktrace.c:123) [ 50.943814][ C1] ? add_chain_cache (kernel/locking/lockdep.c:3730) [ 50.944030][ C1] ? save_trace (kernel/locking/lockdep.c:586) [ 50.944386][ C1] mark_lock (kernel/locking/lockdep.c:4678) [ 50.944550][ C1] mark_usage (kernel/locking/lockdep.c:4567) [ 50.944712][ C1] __lock_acquire (kernel/locking/lockdep.c:5091) [ 50.944942][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 50.945156][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 50.945654][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 50.945867][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 50.946190][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 50.946537][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 50.946751][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 50.947084][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 50.947304][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 50.947854][ C1] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 50.948057][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 50.948375][ C1] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 50.948704][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 50.949216][ C1] call_timer_fn (kernel/time/timer.c:1793) [ 50.949431][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 50.949649][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 50.950001][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) [ 50.950214][ C1] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 50.950387][ C1] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) [ 50.950601][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 50.951128][ C1] ? __pfx___run_timers (kernel/time/timer.c:2389) [ 50.951343][ 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) [ 50.951555][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 50.951773][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 50.951986][ C1] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) [ 50.952344][ C1] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) [ 50.952558][ C1] __do_softirq (kernel/softirq.c:554) [ 50.952774][ C1] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) [ 50.952935][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) [ 50.953286][ C1] [ 50.953397][ C1] [ 50.953507][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) [ 50.953776][ 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) [ 50.953998][ 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 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 [ 50.954946][ C1] RSP: 0018:ffffc9000014fdf8 EFLAGS: 00000246 [ 50.955128][ C1] RAX: 00000000000a6e77 RBX: 1ffff92000029fc1 RCX: ffffffffbab0e9d5 [ 50.955408][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb84aa4a4 [ 50.955618][ C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c1709c [ 50.955919][ C1] R10: ffff8880360b84e3 R11: ffff8880360ad9b0 R12: 0000000000000000 [ 50.956120][ C1] R13: ffff888001b7a300 R14: dffffc0000000000 R15: 0000000000000000 [ 50.956323][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) [ 50.956461][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:192) [ 50.956696][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) [ 50.956845][ C1] cpuidle_idle_call (kernel/sched/idle.c:192) [ 50.956978][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) [ 50.957113][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) [ 50.957326][ C1] do_idle (kernel/sched/idle.c:332) [ 50.957427][ C1] cpu_startup_entry (kernel/sched/idle.c:429 (discriminator 1)) [ 50.957558][ C1] start_secondary (arch/x86/kernel/smpboot.c:201 arch/x86/kernel/smpboot.c:281) [ 50.957691][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:231) Finger prints: common_startup_64:dump_stack_lvl:mark_lock_irq:mark_lock