====================================== | [ 82.885410][ T344] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) | [ 82.885581][ T344] | [ 82.885650][ T344] | [ 82.885650][ T344] stack backtrace: [ 82.886118][ T344] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 82.886425][ T344] Call Trace: [ 82.886529][ T344] [ 82.886600][ T344] dump_stack_lvl (lib/dump_stack.c:117) [ 82.886821][ T344] print_bad_irq_dependency (kernel/locking/lockdep.c:2626) [ 82.886958][ T344] ? 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) [ 82.887094][ T344] ? __pfx_print_bad_irq_dependency (kernel/locking/lockdep.c:2569) [ 82.887266][ T344] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) [ 82.887493][ T344] ? __bfs (kernel/locking/lockdep.c:1787) [ 82.887600][ T344] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) [ 82.887736][ T344] check_irq_usage (kernel/locking/lockdep.c:2871) [ 82.887874][ T344] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2790) [ 82.888092][ T344] ? __bfs (kernel/locking/lockdep.c:1787) [ 82.888194][ T344] ? __pfx_hlock_conflict (kernel/locking/lockdep.c:2016) [ 82.888331][ T344] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 82.888486][ T344] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 82.888633][ T344] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2163) [ 82.888863][ T344] ? check_prev_add (kernel/locking/lockdep.c:3138) [ 82.888998][ T344] check_prev_add (kernel/locking/lockdep.c:3138) [ 82.889133][ T344] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) [ 82.889269][ T344] validate_chain (kernel/locking/lockdep.c:3254 kernel/locking/lockdep.c:3869) [ 82.889487][ T344] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 82.889590][ T344] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 82.889727][ T344] ? 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) [ 82.889863][ T344] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 82.889967][ T344] __lock_acquire (kernel/locking/lockdep.c:5137) [ 82.890269][ T344] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 82.890404][ T344] ? __get_task_comm (fs/exec.c:1234) [ 82.890541][ T344] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 82.890646][ T344] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 82.890864][ T344] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 82.891000][ T344] ? __get_task_comm (fs/exec.c:1234) [ 82.891133][ T344] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 82.891268][ T344] ? __get_task_comm (fs/exec.c:1234) [ 82.891402][ T344] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 82.891633][ T344] ? __get_task_comm (fs/exec.c:1234) [ 82.891773][ T344] __get_task_comm (fs/exec.c:1234) [ 82.891909][ T344] ref_tracker_alloc (lib/ref_tracker.c:217) [ 82.892049][ T344] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 82.892186][ T344] ? __pfx_ref_tracker_alloc (lib/ref_tracker.c:193) [ 82.892321][ T344] ? rt_flush_dev (./include/linux/netdevice.h:4036 ./include/linux/netdevice.h:4114 net/ipv4/route.c:1555) [ 82.892471][ T344] ? fib_netdev_event (net/ipv4/fib_frontend.c:1520) [ 82.892610][ T344] ? notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) [ 82.892831][ T344] ? unregister_netdevice_many_notify (net/core/dev.c:11171) [ 82.892999][ T344] ? rtnl_dellink (net/core/rtnetlink.c:3238 net/core/rtnetlink.c:3288) [ 82.893136][ T344] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6594) [ 82.893271][ T344] ? netlink_rcv_skb (net/netlink/af_netlink.c:2559) [ 82.893489][ T344] ? netlink_unicast (net/netlink/af_netlink.c:1335 net/netlink/af_netlink.c:1361) [ 82.893626][ T344] ? netlink_sendmsg (net/netlink/af_netlink.c:1905) [ 82.893780][ T344] ? ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2584) [ 82.893985][ T344] ? ___sys_sendmsg (net/socket.c:2640) [ 82.894336][ T344] ? __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2669) [ 82.894543][ T344] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 82.894716][ T344] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 82.894980][ T344] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 82.895303][ T344] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 82.895516][ T344] ? rt_flush_dev (net/ipv4/route.c:1551) [ 82.895718][ T344] rt_flush_dev (./include/linux/netdevice.h:4036 ./include/linux/netdevice.h:4114 net/ipv4/route.c:1555) [ 82.895931][ T344] ? __timer_delete_sync (kernel/time/timer.c:1648 (discriminator 1)) [ 82.896154][ T344] ? __timer_delete_sync (kernel/time/timer.c:1668 (discriminator 34)) [ 82.896507][ T344] fib_netdev_event (net/ipv4/fib_frontend.c:1520) [ 82.896727][ T344] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) [ 82.896952][ T344] unregister_netdevice_many_notify (net/core/dev.c:11171) [ 82.897223][ T344] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) [ 82.897580][ T344] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11113) [ 82.897846][ T344] ? 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) [ 82.898065][ T344] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11097) [ 82.898485][ T344] rtnl_dellink (net/core/rtnetlink.c:3238 net/core/rtnetlink.c:3288) [ 82.898783][ T344] ? 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) [ 82.898991][ T344] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3244) [ 82.899219][ T344] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) [ 82.899437][ T344] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) [ 82.899653][ T344] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 82.899873][ T344] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6592) [ 82.900083][ T344] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) [ 82.900299][ T344] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 82.900656][ T344] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 82.900878][ T344] rtnetlink_rcv_msg (net/core/rtnetlink.c:6594) [ 82.901087][ T344] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6488) [ 82.901291][ T344] ? 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) [ 82.901496][ T344] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 82.901655][ T344] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 82.901863][ T344] netlink_rcv_skb (net/netlink/af_netlink.c:2559) [ 82.902072][ T344] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6488) [ 82.902286][ T344] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2536) [ 82.902624][ T344] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 82.902838][ T344] ? netlink_deliver_tap (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [ 82.903043][ T344] ? lock_acquire (kernel/locking/lockdep.c:5727) [ 82.903251][ T344] ? netlink_deliver_tap (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [ 82.903601][ T344] ? netlink_deliver_tap (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [ 82.903807][ T344] ? netlink_deliver_tap (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 net/netlink/af_netlink.c:340) [ 82.904023][ T344] netlink_unicast (net/netlink/af_netlink.c:1335 net/netlink/af_netlink.c:1361) [ 82.904232][ T344] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1346) [ 82.904567][ T344] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 82.904777][ T344] netlink_sendmsg (net/netlink/af_netlink.c:1905) [ 82.904984][ T344] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1824) [ 82.905188][ T344] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) [ 82.905407][ T344] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) [ 82.905603][ T344] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2584) [ 82.905817][ T344] ? __pfx_____sys_sendmsg (net/socket.c:2530) [ 82.906042][ T344] ? __pfx_copy_msghdr_from_user (net/socket.c:2510) [ 82.906445][ T344] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 82.906666][ T344] ___sys_sendmsg (net/socket.c:2640) [ 82.906886][ T344] ? __pfx____sys_sendmsg (net/socket.c:2627) [ 82.907106][ T344] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 82.907314][ T344] ? __lock_release (kernel/locking/lockdep.c:5430) [ 82.907668][ T344] ? __debug_check_no_obj_freed (lib/debugobjects.c:1000) [ 82.907921][ T344] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 82.908137][ T344] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 82.908357][ T344] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 82.908646][ T344] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) [ 82.908873][ T344] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2669) [ 82.909090][ T344] ? __pfx___sys_sendmsg (net/socket.c:2655) [ 82.909309][ T344] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 82.909671][ T344] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 82.909948][ T344] RIP: 0033:0x7f6d0c6cc7b7 [ 82.910187][ T344] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 All code ======== 0: 0a 00 or (%rax),%al 2: f7 d8 neg %eax 4: 64 89 02 mov %eax,%fs:(%rdx) 7: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax e: eb b9 jmp 0xffffffffffffffc9 10: 0f 1f 00 nopl (%rax) 13: f3 0f 1e fa endbr64 17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax 1e: 00 1f: 85 c0 test %eax,%eax 21: 75 10 jne 0x33 23: b8 2e 00 00 00 mov $0x2e,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 51 ja 0x83 32: c3 ret 33: 48 83 ec 28 sub $0x28,%rsp 37: 89 54 24 1c mov %edx,0x1c(%rsp) 3b: 48 89 74 24 10 mov %rsi,0x10(%rsp) Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 51 ja 0x59 8: c3 ret 9: 48 83 ec 28 sub $0x28,%rsp d: 89 54 24 1c mov %edx,0x1c(%rsp) 11: 48 89 74 24 10 mov %rsi,0x10(%rsp) [ 82.910931][ T344] RSP: 002b:00007ffcf4115788 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 82.911258][ T344] RAX: ffffffffffffffda RBX: 0000000023646320 RCX: 00007f6d0c6cc7b7 [ 82.911744][ T344] RDX: 0000000000000000 RSI: 00007ffcf41157c0 RDI: 0000000000000005 [ 82.912069][ T344] RBP: 0000000023646230 R08: 0000000000000003 R09: 0000000000000000 [ 82.912397][ T344] R10: 0000000000000040 R11: 0000000000000246 R12: 00000000236498c0 Finger prints: dump_stack_lvl:print_bad_irq_dependency:check_irq_usage:check_prev_add