======================================
| [ 50.522705][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
| [ 50.522914][ C2]
| [ 50.522997][ C2]
| [ 50.522997][ C2] stack backtrace:
[ 50.523535][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 50.523898][ C2] Call Trace:
[ 50.524108][ C2]
[ 50.524196][ C2] dump_stack_lvl (lib/dump_stack.c:117)
[ 50.524365][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 50.524584][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 50.524790][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264)
[ 50.525044][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256)
[ 50.525211][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26)
[ 50.525378][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244)
[ 50.525543][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207)
[ 50.525788][ C2] ? stack_trace_save (kernel/stacktrace.c:123)
[ 50.525954][ C2] ? add_chain_cache (kernel/locking/lockdep.c:3730)
[ 50.526120][ C2] ? save_trace (kernel/locking/lockdep.c:586)
[ 50.526288][ C2] mark_lock (kernel/locking/lockdep.c:4678)
[ 50.526504][ C2] mark_usage (kernel/locking/lockdep.c:4567)
[ 50.526634][ C2] __lock_acquire (kernel/locking/lockdep.c:5091)
[ 50.526801][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137)
[ 50.526966][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 50.527330][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 50.527495][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 50.527740][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 50.527904][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 50.528157][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 50.528398][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 50.528562][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 50.528806][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154)
[ 50.529051][ C2] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 50.529292][ C2] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 50.529533][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 50.529900][ C2] call_timer_fn (kernel/time/timer.c:1793)
[ 50.530068][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783)
[ 50.530255][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783)
[ 50.530420][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770)
[ 50.530585][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 50.530797][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418)
[ 50.530962][ C2] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 50.531253][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389)
[ 50.531423][ C2] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 50.531673][ 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)
[ 50.531836][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 50.532001][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 50.532165][ C2] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181)
[ 50.532414][ C2] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181)
[ 50.532582][ 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)
[ 50.532747][ C2] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869)
[ 50.532961][ C2] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003)
[ 50.533207][ C2] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061)
[ 50.533372][ C2] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4) kernel/time/timekeeping.c:289 (discriminator 4) kernel/time/timekeeping.c:388 (discriminator 4) kernel/time/timekeeping.c:848 (discriminator 4))
[ 50.533496][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026)
[ 50.533673][ C2] ? hrtimer_interrupt (kernel/time/hrtimer.c:1831)
[ 50.533920][ C2] __do_softirq (kernel/softirq.c:554)
[ 50.534084][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 50.534255][ C2] do_softirq (kernel/softirq.c:455 kernel/softirq.c:442)
[ 50.534382][ C2]
[ 50.534467][ C2]
[ 50.534551][ C2] __local_bh_enable_ip (kernel/softirq.c:382)
[ 50.534800][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:849 net/core/dev.c:4399)
[ 50.534963][ C2] __dev_queue_xmit (net/core/dev.c:4400)
[ 50.535130][ C2] ? packet_parse_headers (./include/linux/skbuff.h:3028 net/packet/af_packet.c:1944)
[ 50.535302][ C2] ? packet_parse_headers (./include/linux/skbuff.h:3028 net/packet/af_packet.c:1944)
[ 50.535633][ C2] ? copy_page_from_iter (lib/iov_iter.c:424 lib/iov_iter.c:411)
[ 50.535808][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4281)
[ 50.535975][ C2] packet_snd (net/packet/af_packet.c:3081)
[ 50.536145][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 50.536389][ C2] ? __pfx_packet_snd (net/packet/af_packet.c:2944)
[ 50.536554][ C2] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209)
[ 50.536719][ C2] ? trace_raw_output_mmap_lock_acquire_returned (./include/trace/events/mmap_lock.h:52 (discriminator 2))
[ 50.536963][ C2] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209)
[ 50.537212][ C2] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191)
[ 50.537382][ C2] ? __pfx___sys_sendto (net/socket.c:2161)
[ 50.537548][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 50.537714][ C2] ? sock_ioctl (net/socket.c:1344)
[ 50.537963][ C2] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316)
[ 50.538168][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359)
[ 50.538378][ C2] __x64_sys_sendto (net/socket.c:2199)
[ 50.538541][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 50.538832][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 50.538998][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
[ 50.539203][ C2] RIP: 0033:0x7fc9b2cfe85a
[ 50.539376][ C2] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
All code
========
0: d8 64 89 02 fsubs 0x2(%rcx,%rcx,4)
4: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax
b: eb b8 jmp 0xffffffffffffffc5
d: 0f 1f 00 nopl (%rax)
10: f3 0f 1e fa endbr64
14: 41 89 ca mov %ecx,%r10d
17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax
1e: 00
1f: 85 c0 test %eax,%eax
21: 75 15 jne 0x38
23: b8 2c 00 00 00 mov $0x2c,%eax
28: 0f 05 syscall
2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction
30: 77 7e ja 0xb0
32: c3 ret
33: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
38: 41 54 push %r12
3a: 48 83 ec 30 sub $0x30,%rsp
3e: 44 rex.R
3f: 89 .byte 0x89
Code starting with the faulting instruction
===========================================
0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
6: 77 7e ja 0x86
8: c3 ret
9: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
e: 41 54 push %r12
10: 48 83 ec 30 sub $0x30,%rsp
14: 44 rex.R
15: 89 .byte 0x89
[ 50.540057][ C2] RSP: 002b:00007ffc51265a58 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 50.540425][ C2] RAX: ffffffffffffffda RBX: 000000003fe079d0 RCX: 00007fc9b2cfe85a
[ 50.540675][ C2] RDX: 0000000000001f6a RSI: 000000003fe0b8e2 RDI: 0000000000000005
[ 50.540926][ C2] RBP: 000000003fe0b8e2 R08: 00007ffc51265a60 R09: 0000000000000014
[ 50.541258][ C2] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage