====================================== | [ 44.232594][ T590] #0: ffffffffafde7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3521) | [ 44.233025][ T590] #1: ffffffffafdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 44.233496][ T590] | [ 44.233496][ T590] stack backtrace: [ 44.234131][ T590] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.234420][ T590] Call Trace: [ 44.234595][ T590] [ 44.234718][ T590] dump_stack_lvl (lib/dump_stack.c:123) [ 44.234961][ T590] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 44.235197][ T590] validate_chain (kernel/locking/lockdep.c:3894) [ 44.235429][ T590] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 44.235672][ T590] ? 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) [ 44.235895][ T590] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 44.236068][ T590] __lock_acquire (kernel/locking/lockdep.c:5226) [ 44.236289][ T590] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 44.236524][ T590] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 44.236815][ T590] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [ 44.237112][ T590] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 44.237343][ T590] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 44.237607][ T590] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 44.237856][ T590] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 44.238083][ T590] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 44.238208][ T590] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 44.238418][ T590] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 44.238580][ T590] ? __lock_release (kernel/locking/lockdep.c:5525) [ 44.238742][ T590] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 44.238916][ T590] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 44.239081][ T590] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 44.239243][ T590] __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)) [ 44.239421][ T590] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 44.239623][ T590] ? __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) [ 44.239785][ T590] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [ 44.239992][ T590] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 44.240157][ T590] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 44.240318][ T590] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 44.240526][ T590] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 44.240693][ T590] ? 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) [ 44.240853][ T590] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 44.241015][ T590] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 44.241224][ T590] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [ 44.241439][ T590] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 44.241590][ T590] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 44.241740][ T590] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 44.241923][ T590] ? 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) [ 44.242076][ T590] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 44.242190][ T590] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 44.242390][ T590] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 44.242576][ T590] ? kfree (mm/slub.c:4613 mm/slub.c:4761) [ 44.242692][ T590] ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387) [ 44.242846][ T590] ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387) [ 44.243000][ T590] rtnl_dellink (net/core/rtnetlink.c:3487 net/core/rtnetlink.c:3527) [ 44.243154][ T590] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 44.243319][ T590] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 44.243478][ T590] ? __lock_release (kernel/locking/lockdep.c:5525) [ 44.243630][ T590] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 44.243789][ T590] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 44.243942][ T590] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 44.244094][ T590] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 44.244244][ T590] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 44.244417][ T590] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 44.244571][ T590] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 44.244727][ T590] ? 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) [ 44.244873][ T590] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 44.244987][ T590] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 44.245141][ T590] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 44.245288][ T590] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 44.245447][ T590] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 44.245602][ T590] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 44.245762][ T590] ? 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) [ 44.245915][ T590] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 44.246067][ T590] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 44.246215][ T590] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 44.246395][ T590] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 44.246546][ T590] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 44.246696][ T590] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 44.246849][ T590] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 44.246999][ T590] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 44.247199][ T590] ___sys_sendmsg (net/socket.c:2650) [ 44.247349][ T590] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 44.247504][ T590] ? kasan_save_stack (mm/kasan/common.c:49) [ 44.247660][ T590] ? kasan_save_stack (mm/kasan/common.c:48) [ 44.247840][ T590] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 44.248066][ T590] ? __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) [ 44.248342][ T590] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 44.248560][ T590] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 44.248775][ T590] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 44.249005][ T590] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 44.249169][ T590] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 44.249323][ T590] ? __lock_release (kernel/locking/lockdep.c:5525) [ 44.249480][ T590] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 44.249640][ T590] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 44.249792][ T590] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 44.250004][ T590] __sys_sendmsg (net/socket.c:2680) [ 44.250207][ T590] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 44.250423][ T590] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 44.250721][ T590] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 44.250970][ T590] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 44.251257][ T590] RIP: 0033:0x7efc883fa9a7 [ 44.251526][ T590] 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) [ 44.252349][ T590] RSP: 002b:00007ffd0ef40d08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.252717][ T590] RAX: ffffffffffffffda RBX: 00007ffd0ef41430 RCX: 00007efc883fa9a7 [ 44.253068][ T590] RDX: 0000000000000000 RSI: 00007ffd0ef40d70 RDI: 0000000000000005 [ 44.253413][ T590] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 44.253764][ T590] R10: 00007efc882b8ef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain