====================================== | [ 44.911272][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) | [ 44.911561][ C0] | [ 44.911681][ C0] | [ 44.911681][ C0] stack backtrace: [ 44.912479][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 44.912999][ C0] Call Trace: [ 44.913186][ C0] [ 44.913306][ C0] dump_stack_lvl (lib/dump_stack.c:117) [ 44.913548][ C0] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 44.913826][ C0] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) [ 44.914110][ C0] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 44.914335][ C0] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 44.914566][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) [ 44.914809][ C0] mark_lock_irq (kernel/locking/lockdep.c:4244) [ 44.915054][ C0] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) [ 44.915452][ C0] ? stack_trace_save (kernel/stacktrace.c:123) [ 44.915680][ C0] ? add_chain_cache (kernel/locking/lockdep.c:3730) [ 44.915910][ C0] ? save_trace (kernel/locking/lockdep.c:586) [ 44.916140][ C0] mark_lock (kernel/locking/lockdep.c:4678) [ 44.916312][ C0] mark_usage (kernel/locking/lockdep.c:4567) [ 44.916483][ C0] __lock_acquire (kernel/locking/lockdep.c:5091) [ 44.916712][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 44.916947][ C0] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 44.917356][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 44.917584][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.917927][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 44.918153][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 44.918533][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.918879][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 44.919103][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.919444][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 44.919823][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.920166][ C0] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge [ 44.920514][ C0] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 44.921254][ C0] call_timer_fn (kernel/time/timer.c:1793) [ 44.921490][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 44.921722][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) [ 44.921969][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) [ 44.922201][ 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) [ 44.922444][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 44.922687][ C0] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) [ 44.922925][ C0] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge [ 44.923353][ C0] ? __pfx___run_timers (kernel/time/timer.c:2389) [ 44.923582][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) [ 44.923817][ 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) [ 44.924062][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 44.924451][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 44.924686][ C0] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181) [ 44.924923][ C0] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181) [ 44.925162][ 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) [ 44.925392][ C0] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869) [ 44.925848][ 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) [ 44.926082][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 44.926269][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 44.926499][ C0] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003) [ 44.926878][ C0] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061) [ 44.927027][ 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) [ 44.927173][ C0] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) [ 44.927321][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) [ 44.927594][ C0] __do_softirq (kernel/softirq.c:554) [ 44.927742][ C0] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) [ 44.927858][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) [ 44.928004][ C0] [ 44.928081][ C0] [ 44.928245][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) [ 44.928428][ C0] RIP: 0010:_raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:160 kernel/locking/spinlock.c:202) [ 44.928618][ C0] Code: 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 75 39 9b fd 48 89 ef e8 ad a9 9b fd e8 c8 a3 be fd fb 65 ff 0d 68 af af 49 <74> 06 5d c3 cc cc cc cc 0f 1f 44 00 00 5d c3 cc cc cc cc 66 66 2e All code ======== 0: 44 00 00 add %r8b,(%rax) 3: 55 push %rbp 4: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 9: 48 89 fd mov %rdi,%rbp c: 48 83 c7 18 add $0x18,%rdi 10: e8 75 39 9b fd call 0xfffffffffd9b398a 15: 48 89 ef mov %rbp,%rdi 18: e8 ad a9 9b fd call 0xfffffffffd9ba9ca 1d: e8 c8 a3 be fd call 0xfffffffffdbea3ea 22: fb sti 23: 65 ff 0d 68 af af 49 decl %gs:0x49afaf68(%rip) # 0x49afaf92 2a:* 74 06 je 0x32 <-- trapping instruction 2c: 5d pop %rbp 2d: c3 ret 2e: cc int3 2f: cc int3 30: cc int3 31: cc int3 32: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 37: 5d pop %rbp 38: c3 ret 39: cc int3 3a: cc int3 3b: cc int3 3c: cc int3 3d: 66 data16 3e: 66 data16 3f: 2e cs Code starting with the faulting instruction =========================================== 0: 74 06 je 0x8 2: 5d pop %rbp 3: c3 ret 4: cc int3 5: cc int3 6: cc int3 7: cc int3 8: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) d: 5d pop %rbp e: c3 ret f: cc int3 10: cc int3 11: cc int3 12: cc int3 13: 66 data16 14: 66 data16 15: 2e cs [ 44.929236][ C0] RSP: 0018:ffffc900006cf878 EFLAGS: 00000282 [ 44.929434][ C0] RAX: 0000000000008a57 RBX: 1ffff920000d9f14 RCX: 1ffffffff72e4856 [ 44.929751][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb6541898 [ 44.929971][ C0] RBP: ffff888005b5a000 R08: 0000000000000001 R09: fffffbfff72e3ca5 [ 44.930191][ C0] R10: ffffffffb971e52f R11: ffffc900006cf3c1 R12: ffff8880063f6e80 [ 44.930511][ C0] R13: 0000000000000000 R14: ffff8880063f6e78 R15: 0000000000000000 [ 44.930734][ C0] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) [ 44.930882][ C0] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) [ 44.931029][ C0] p9_tag_alloc (./include/linux/local_lock_internal.h:36 ./include/linux/idr.h:174 net/9p/client.c:321) [ 44.931276][ C0] ? __pfx_p9_tag_alloc (net/9p/client.c:277) [ 44.931422][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) [ 44.931570][ C0] ? stack_depot_save_flags (lib/stackdepot.c:609) [ 44.931719][ 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) [ 44.931865][ C0] p9_client_prepare_req (net/9p/client.c:641) [ 44.932012][ C0] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 44.932199][ C0] ? __kasan_kmalloc (mm/kasan/common.c:391) [ 44.932356][ C0] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) [ 44.932555][ C0] ? vfs_fstat (./include/linux/file.h:47 fs/stat.c:199) [ 44.932680][ C0] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) [ 44.932841][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) [ 44.933005][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 44.933254][ C0] ? __pfx_p9_client_rpc (net/9p/client.c:672) [ 44.933415][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 44.933576][ C0] ? __create_object (mm/kmemleak.c:756) [ 44.933737][ C0] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) [ 44.933899][ C0] p9_client_getattr_dotl (net/9p/client.c:1732) [ 44.934147][ C0] v9fs_vfs_getattr_dotl (fs/9p/vfs_inode_dotl.c:396) [ 44.934309][ C0] ovl_getattr (fs/overlayfs/overlayfs.h:416 fs/overlayfs/inode.c:174) [ 44.934473][ C0] ? __pfx_ovl_getattr (fs/overlayfs/inode.c:159) [ 44.934638][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 44.934973][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) [ 44.935131][ C0] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) [ 44.935288][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 44.935447][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 44.935691][ C0] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) [ 44.935848][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 44.936005][ C0] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) [ 44.936162][ C0] ? vfs_getattr_nosec (fs/stat.c:112) [ 44.936409][ C0] vfs_fstat (./include/linux/file.h:47 fs/stat.c:199) [ 44.936529][ C0] __do_sys_newfstatat (fs/stat.c:469) [ 44.936686][ C0] ? __pfx___do_sys_newfstatat (fs/stat.c:464) [ 44.936863][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 44.937059][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 44.937313][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 44.937513][ C0] RIP: 0033:0x7fc6b69e7eae [ 44.937675][ C0] Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 07 00 00 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 0b 31 c0 c3 0f 1f 84 00 00 00 00 00 f7 d8 89 05 All code ======== 0: 48 89 f2 mov %rsi,%rdx 3: b9 00 01 00 00 mov $0x100,%ecx 8: 48 89 fe mov %rdi,%rsi b: bf 9c ff ff ff mov $0xffffff9c,%edi 10: e9 07 00 00 00 jmp 0x1c 15: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 1c: f3 0f 1e fa endbr64 20: 41 89 ca mov %ecx,%r10d 23: b8 06 01 00 00 mov $0x106,%eax 28: 0f 05 syscall 2a:* 3d 00 f0 ff ff cmp $0xfffff000,%eax <-- trapping instruction 2f: 77 0b ja 0x3c 31: 31 c0 xor %eax,%eax 33: c3 ret 34: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 3b: 00 3c: f7 d8 neg %eax 3e: 89 .byte 0x89 3f: 05 .byte 0x5 Code starting with the faulting instruction =========================================== 0: 3d 00 f0 ff ff cmp $0xfffff000,%eax 5: 77 0b ja 0x12 7: 31 c0 xor %eax,%eax 9: c3 ret a: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 11: 00 12: f7 d8 neg %eax 14: 89 .byte 0x89 15: 05 .byte 0x5 [ 44.938226][ C0] RSP: 002b:00007ffd43d0ab58 EFLAGS: 00000206 ORIG_RAX: 0000000000000106 [ 44.938465][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc6b69e7eae [ 44.938705][ C0] RDX: 00007ffd43d0abf0 RSI: 00007fc6b69ebcfb RDI: 0000000000000005 [ 44.938936][ C0] RBP: 00007ffd43d0acb0 R08: 00007fc6b69ba850 R09: 00007fc6b69b9940 [ 44.939170][ C0] R10: 0000000000001000 R11: 0000000000000206 R12: 00007fc6b69b9940 Finger prints: dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage