====================================== | [ 79.935137][ T619] #0: ffffffffb8de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3521) | [ 79.935432][ T619] #1: ffffffffb8dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 79.935760][ T619] | [ 79.935760][ T619] stack backtrace: [ 79.936206][ T619] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 79.936409][ T619] Call Trace: [ 79.936535][ T619] [ 79.936620][ T619] dump_stack_lvl (lib/dump_stack.c:123) [ 79.936790][ T619] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 79.936954][ T619] validate_chain (kernel/locking/lockdep.c:3894) [ 79.937116][ T619] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 79.937287][ T619] ? 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) [ 79.937452][ T619] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 79.937578][ T619] __lock_acquire (kernel/locking/lockdep.c:5226) [ 79.937743][ T619] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 79.937905][ T619] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 79.938148][ T619] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [ 79.938356][ T619] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 79.938525][ T619] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 79.938686][ T619] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 79.938850][ T619] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 79.939053][ T619] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 79.939180][ T619] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 79.939382][ T619] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 79.939545][ T619] ? __lock_release (kernel/locking/lockdep.c:5525) [ 79.939712][ T619] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 79.939878][ T619] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 79.940042][ T619] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 79.940210][ T619] __netdev_upper_dev_unlink (net/core/dev.c:8000 (discriminator 11) net/core/dev.c:8017 (discriminator 11) net/core/dev.c:8167 (discriminator 11)) [ 79.940375][ T619] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 79.940574][ T619] ? __mutex_unlock_slowpath (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4329 ./include/linux/atomic/atomic-long.h:1506 ./include/linux/atomic/atomic-instrumented.h:4481 kernel/locking/mutex.c:913) [ 79.940743][ T619] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [ 79.940944][ T619] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 79.941110][ T619] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 79.941270][ T619] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 79.941474][ T619] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 79.941637][ T619] ? 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.h:47 kernel/locking/mutex.c:66) [ 79.941801][ T619] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 79.941989][ T619] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 79.942205][ T619] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [ 79.942373][ T619] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 79.942534][ T619] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 79.942695][ T619] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 79.942897][ T619] ? __lock_release (kernel/locking/lockdep.c:5525) [ 79.943072][ T619] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 79.943239][ T619] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 79.943442][ T619] ? 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) [ 79.943607][ T619] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 79.943770][ T619] ? __pfx_vlan_info_rcu_free (net/8021q/vlan_core.c:145) [ 79.943935][ T619] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 79.944138][ T619] rtnl_dellink (net/core/rtnetlink.c:3487 net/core/rtnetlink.c:3527) [ 79.944304][ T619] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 79.944486][ T619] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 79.944652][ T619] ? __lock_release (kernel/locking/lockdep.c:5525) [ 79.944814][ T619] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 79.944975][ T619] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 79.945137][ T619] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 79.945301][ T619] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 79.945467][ T619] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 79.945633][ T619] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 79.945792][ T619] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 79.945969][ T619] ? 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) [ 79.946142][ T619] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 79.946268][ T619] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 79.946434][ T619] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 79.946599][ T619] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 79.946765][ T619] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 79.946935][ T619] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 79.947097][ T619] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [ 79.947261][ T619] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 79.947423][ T619] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 79.947587][ T619] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 79.947751][ T619] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 79.947910][ T619] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 79.948080][ T619] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 79.948246][ T619] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 79.948408][ T619] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 79.948614][ T619] ___sys_sendmsg (net/socket.c:2650) [ 79.948780][ T619] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 79.948944][ T619] ? kasan_save_stack (mm/kasan/common.c:49) [ 79.949108][ T619] ? kasan_save_stack (mm/kasan/common.c:48) [ 79.949274][ T619] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 79.949438][ T619] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:87 ./arch/x86/include/asm/irqflags.h:123 kernel/rcu/tree.c:3087) [ 79.949640][ T619] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 79.949803][ T619] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 79.949984][ T619] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 79.950192][ T619] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 79.950355][ T619] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 79.950526][ T619] ? __lock_release (kernel/locking/lockdep.c:5525) [ 79.950685][ T619] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 79.950848][ T619] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 79.951009][ T619] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 79.951170][ T619] __sys_sendmsg (net/socket.c:2680) [ 79.951330][ T619] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 79.951490][ T619] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 79.951701][ T619] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 79.951861][ T619] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 79.952065][ T619] RIP: 0033:0x7fefe1a589a7 [ 79.952324][ T619] 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) [ 79.953165][ T619] RSP: 002b:00007ffd22ed8278 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 79.953480][ T619] RAX: ffffffffffffffda RBX: 00007ffd22ed89a0 RCX: 00007fefe1a589a7 [ 79.953825][ T619] RDX: 0000000000000000 RSI: 00007ffd22ed82e0 RDI: 0000000000000005 [ 79.954166][ T619] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 79.954552][ T619] R10: 00007fefe1916ef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain