======================================
| [ 30.042061][ C0] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623)
| [ 30.042214][ C0]
| [ 30.042291][ C0]
| [ 30.042291][ C0] stack backtrace:
[ 30.042818][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 30.043159][ C0] Call Trace:
[ 30.043280][ C0]
[ 30.043364][ C0] dump_stack_lvl (lib/dump_stack.c:117)
[ 30.043523][ C0] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 30.043718][ C0] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94)
[ 30.043892][ C0] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024)
[ 30.044188][ C0] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264)
[ 30.044343][ C0] ? __pfx_usage_match (kernel/locking/lockdep.c:2256)
[ 30.044497][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26)
[ 30.044655][ C0] mark_lock_irq (kernel/locking/lockdep.c:4244)
[ 30.044813][ C0] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207)
[ 30.044968][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114)
[ 30.045135][ C0] ? save_trace (kernel/locking/lockdep.c:586)
[ 30.045286][ C0] mark_lock (kernel/locking/lockdep.c:4678)
[ 30.045404][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114)
[ 30.045555][ C0] mark_usage (kernel/locking/lockdep.c:4567)
[ 30.045670][ C0] __lock_acquire (kernel/locking/lockdep.c:5091)
[ 30.045842][ C0] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825)
[ 30.045999][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016)
[ 30.046152][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 30.046307][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023)
[ 30.046461][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 30.046618][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 30.046777][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023)
[ 30.046930][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 30.047094][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023)
[ 30.047243][ C0] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300)
[ 30.047395][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023)
[ 30.047544][ C0] addrconf_rs_timer (net/ipv6/addrconf.c:4023)
[ 30.047702][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 30.047853][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016)
[ 30.048006][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783)
[ 30.048157][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 30.048308][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783)
[ 30.048462][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016)
[ 30.048613][ C0] call_timer_fn (kernel/time/timer.c:1793)
[ 30.048765][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783)
[ 30.048917][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783)
[ 30.049067][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1770)
[ 30.049222][ C0] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228)
[ 30.049374][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 30.049526][ C0] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418)
[ 30.049679][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016)
[ 30.049829][ C0] ? __pfx___run_timers (kernel/time/timer.c:2389)
[ 30.049980][ C0] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 30.050132][ C0] ? 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)
[ 30.050283][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 30.050432][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727)
[ 30.050590][ C0] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181)
[ 30.050742][ C0] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181)
[ 30.050892][ C0] 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)
[ 30.051042][ C0] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869)
[ 30.051229][ C0] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228)
[ 30.051379][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 30.051497][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 30.051648][ C0] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003)
[ 30.051824][ C0] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061)
[ 30.051980][ C0] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026)
[ 30.052136][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 30.052291][ C0] __do_softirq (kernel/softirq.c:554)
[ 30.052456][ C0] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645)
[ 30.052576][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043)
[ 30.052731][ C0]
[ 30.052815][ C0]
[ 30.052894][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702)
[ 30.053089][ C0] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194)
[ 30.053290][ C0] Code: 10 e8 81 31 79 fd 48 89 ef e8 b9 a1 79 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d f5 8b 0d 71 <74> 0e 5b 5d c3 cc cc cc cc e8 0f 00 9d fd eb dc 0f 1f 44 00 00 5b
All code
========
0: 10 e8 adc %ch,%al
2: 81 31 79 fd 48 89 xorl $0x8948fd79,(%rcx)
8: ef out %eax,(%dx)
9: e8 b9 a1 79 fd call 0xfffffffffd79a1c7
e: 81 e3 00 02 00 00 and $0x200,%ebx
14: 75 1d jne 0x33
16: 9c pushf
17: 58 pop %rax
18: f6 c4 02 test $0x2,%ah
1b: 75 29 jne 0x46
1d: 48 85 db test %rbx,%rbx
20: 74 01 je 0x23
22: fb sti
23: 65 ff 0d f5 8b 0d 71 decl %gs:0x710d8bf5(%rip) # 0x710d8c1f
2a:* 74 0e je 0x3a <-- trapping instruction
2c: 5b pop %rbx
2d: 5d pop %rbp
2e: c3 ret
2f: cc int3
30: cc int3
31: cc int3
32: cc int3
33: e8 0f 00 9d fd call 0xfffffffffd9d0047
38: eb dc jmp 0x16
3a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
3f: 5b pop %rbx
Code starting with the faulting instruction
===========================================
0: 74 0e je 0x10
2: 5b pop %rbx
3: 5d pop %rbp
4: c3 ret
5: cc int3
6: cc int3
7: cc int3
8: cc int3
9: e8 0f 00 9d fd call 0xfffffffffd9d001d
e: eb dc jmp 0xffffffffffffffec
10: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
15: 5b pop %rbx
[ 30.053845][ C0] RSP: 0000:ffffc9000060f390 EFLAGS: 00000286
[ 30.054050][ C0] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff2447e97
[ 30.054285][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8ef63de1
[ 30.054522][ C0] RBP: ffff8880025bde08 R08: 0000000000000001 R09: fffffbfff24436af
[ 30.054756][ C0] R10: ffffffff9221b57f R11: ffff88803603de40 R12: ffff8880025bde98
[ 30.054992][ C0] R13: ffff8880025bde48 R14: ffff888001042340 R15: 0000000000000000
[ 30.055232][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194)
[ 30.055424][ C0] __delete_object (mm/kmemleak.c:798 (discriminator 3))
[ 30.055578][ C0] ? delete_object_full (mm/kmemleak.c:817)
[ 30.055736][ C0] kfree (./include/linux/kmemleak.h:48 mm/slub.c:2072 mm/slub.c:4280 mm/slub.c:4390)
[ 30.055850][ C0] ? p9_virtio_zc_request (net/9p/trans_virtio.c:558)
[ 30.056100][ C0] p9_virtio_zc_request (net/9p/trans_virtio.c:558)
[ 30.056252][ C0] ? __pfx_p9pdu_writef (net/9p/protocol.c:709)
[ 30.056403][ C0] ? __pfx_p9_virtio_zc_request (net/9p/trans_virtio.c:424)
[ 30.056557][ C0] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94)
[ 30.056711][ C0] ? trace_9p_protocol_dump (./include/trace/events/9p.h:172 (discriminator 55))
[ 30.056862][ C0] ? trace_9p_client_req (./include/trace/events/9p.h:124 (discriminator 52))
[ 30.057012][ C0] ? __pfx_autoremove_wake_function (kernel/sched/wait.c:383)
[ 30.057201][ C0] ? __pfx_p9_client_prepare_req (net/9p/client.c:625)
[ 30.057488][ C0] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825)
[ 30.057661][ C0] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228)
[ 30.057816][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 30.057938][ C0] p9_client_zc_rpc.constprop.0 (net/9p/client.c:805)
[ 30.058132][ C0] ? __pfx_p9_client_zc_rpc.constprop.0 (net/9p/client.c:775)
[ 30.058327][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 30.058482][ C0] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 30.058640][ C0] ? __debug_object_init (lib/debugobjects.c:622)
[ 30.058902][ C0] p9_client_read_once (net/9p/client.c:1565)
[ 30.059059][ C0] ? __pfx_p9_client_read_once (net/9p/client.c:1534)
[ 30.059213][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 30.059409][ C0] ? __debug_object_init (lib/debugobjects.c:622)
[ 30.059566][ C0] p9_client_read (net/9p/client.c:1522)
[ 30.059724][ C0] v9fs_issue_read (fs/9p/vfs_addr.c:76)
[ 30.059879][ C0] ? __pfx_v9fs_issue_read (fs/9p/vfs_addr.c:66)
[ 30.060033][ C0] ? netfs_rreq_prepare_read (fs/netfs/io.c:640)
[ 30.060300][ C0] netfs_rreq_submit_slice (fs/netfs/io.c:694)
[ 30.060470][ C0] netfs_begin_read (fs/netfs/io.c:741)
[ 30.060628][ C0] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 30.060787][ C0] ? __pfx_netfs_begin_read (fs/netfs/io.c:708)
[ 30.060941][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 30.061096][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 30.061252][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 30.061406][ C0] ? netfs_alloc_request (fs/netfs/objects.c:64)
[ 30.061561][ C0] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[ 30.061826][ C0] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186)
[ 30.061979][ C0] netfs_read_folio (fs/netfs/buffered_read.c:318)
[ 30.062129][ C0] ? maybe_unlock_mmap_for_io (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/linux/mm.h:702 ./include/linux/mm.h:765 mm/internal.h:868 mm/internal.h:852)
[ 30.062280][ C0] ? __pfx_netfs_read_folio (fs/netfs/buffered_read.c:248)
[ 30.062555][ C0] filemap_read_folio (mm/filemap.c:2331)
[ 30.062711][ C0] filemap_fault (mm/filemap.c:3382)
[ 30.062867][ C0] ? __pfx_filemap_fault (mm/filemap.c:3250)
[ 30.063025][ C0] ? do_fault_around (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 mm/memory.c:4855)
[ 30.063180][ C0] ? __pfx_filemap_map_pages (mm/filemap.c:3565)
[ 30.063338][ C0] __do_fault (mm/memory.c:4531)
[ 30.063456][ C0] do_pte_missing (mm/memory.c:4894 mm/memory.c:5024 mm/memory.c:3880)
[ 30.063610][ C0] __handle_mm_fault (mm/memory.c:5441)
[ 30.063764][ C0] ? __pfx___handle_mm_fault (mm/memory.c:5352)
[ 30.063930][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52))
[ 30.064087][ C0] ? lock_vma_under_rcu (mm/memory.c:5787)
[ 30.064242][ C0] handle_mm_fault (mm/memory.c:5610)
[ 30.064396][ C0] ? __pfx_handle_mm_fault (mm/memory.c:5576)
[ 30.064654][ C0] do_user_addr_fault (arch/x86/mm/fault.c:1362)
[ 30.064809][ C0] ? irqentry_enter_from_user_mode (./include/linux/entry-common.h:117 kernel/entry/common.c:225)
[ 30.065004][ C0] exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:67 ./arch/x86/include/asm/irqflags.h:127 arch/x86/mm/fault.c:1513 arch/x86/mm/fault.c:1563)
[ 30.065167][ C0] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623)
[ 30.065416][ C0] RIP: 0033:0x7ff910944825
[ 30.065571][ C0] Code: 00 00 00 4c 8d 34 82 4c 8b bc 24 c8 00 00 00 4c 89 64 24 40 49 89 fc eb 11 0f 1f 40 00 49 83 c6 04 83 e2 01 0f 85 2b 06 00 00 <41> 8b 06 48 89 c2 4c 31 e0 48 d1 e8 75 e5 48 83 ec 08 4c 89 f0 48
All code
========
0: 00 00 add %al,(%rax)
2: 00 4c 8d 34 add %cl,0x34(%rbp,%rcx,4)
6: 82 (bad)
7: 4c 8b bc 24 c8 00 00 mov 0xc8(%rsp),%r15
e: 00
f: 4c 89 64 24 40 mov %r12,0x40(%rsp)
14: 49 89 fc mov %rdi,%r12
17: eb 11 jmp 0x2a
19: 0f 1f 40 00 nopl 0x0(%rax)
1d: 49 83 c6 04 add $0x4,%r14
21: 83 e2 01 and $0x1,%edx
24: 0f 85 2b 06 00 00 jne 0x655
2a:* 41 8b 06 mov (%r14),%eax <-- trapping instruction
2d: 48 89 c2 mov %rax,%rdx
30: 4c 31 e0 xor %r12,%rax
33: 48 d1 e8 shr %rax
36: 75 e5 jne 0x1d
38: 48 83 ec 08 sub $0x8,%rsp
3c: 4c 89 f0 mov %r14,%rax
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 41 8b 06 mov (%r14),%eax
3: 48 89 c2 mov %rax,%rdx
6: 4c 31 e0 xor %r12,%rax
9: 48 d1 e8 shr %rax
c: 75 e5 jne 0xfffffffffffffff3
e: 48 83 ec 08 sub $0x8,%rsp
12: 4c 89 f0 mov %r14,%rax
15: 48 rex.W
[ 30.066239][ C0] RSP: 002b:00007ffd037b49e0 EFLAGS: 00010206
[ 30.066433][ C0] RAX: 000000000000045c RBX: 00007ff9106d0ab0 RCX: 0000000000000407
[ 30.066663][ C0] RDX: 00007ff9105db528 RSI: 0000000000000001 RDI: 00000000cf6be145
[ 30.066995][ C0] RBP: 00007ff9105dc940 R08: 0000000000000001 R09: 00007ff91096c4e0
[ 30.067231][ C0] R10: 00007ff9105b46d0 R11: 00007ff9105dc940 R12: 00000000cf6be145
Finger prints:
asm_exc_page_fault:dump_stack_lvl:mark_lock_irq:mark_lock