====================================== | [ 103.602667][ T881] #0: ffffffffa99e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3512) | [ 103.602932][ T881] #1: ffffffffa99d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 103.603226][ T881] | [ 103.603226][ T881] stack backtrace: [ 103.603649][ T881] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 103.603845][ T881] Call Trace: [ 103.603957][ T881] [ 103.604034][ T881] dump_stack_lvl (lib/dump_stack.c:123) [ 103.604186][ T881] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 103.604334][ T881] validate_chain (kernel/locking/lockdep.c:3894) [ 103.604496][ T881] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 103.604653][ T881] ? 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) [ 103.604799][ T881] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 103.604922][ T881] __lock_acquire (kernel/locking/lockdep.c:5226) [ 103.605075][ T881] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 103.605230][ T881] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 103.605419][ T881] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [ 103.605602][ T881] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 103.605760][ T881] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 103.605906][ T881] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 103.606057][ T881] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 103.606251][ T881] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 103.606364][ T881] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 103.606553][ T881] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 103.606708][ T881] ? __lock_release (kernel/locking/lockdep.c:5525) [ 103.606853][ T881] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 103.607008][ T881] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 103.607154][ T881] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 103.607303][ T881] __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)) [ 103.607458][ T881] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 103.607641][ T881] ? __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) [ 103.607787][ T881] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [ 103.607979][ T881] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 103.608127][ T881] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 103.608275][ T881] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 103.608454][ T881] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 103.608607][ T881] ? 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) [ 103.608753][ T881] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 103.608898][ T881] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 103.609081][ T881] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [ 103.609236][ T881] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 103.609388][ T881] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 103.609546][ T881] unregister_netdevice_many_notify (net/core/dev.c:11571) [ 103.609727][ T881] ? 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) [ 103.609872][ T881] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 103.609995][ T881] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11512) [ 103.610175][ T881] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 103.610358][ T881] ? kfree (mm/slub.c:4613 mm/slub.c:4761) [ 103.610477][ T881] ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387) [ 103.610636][ T881] ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387) [ 103.610782][ T881] rtnl_dellink (net/core/rtnetlink.c:3478 net/core/rtnetlink.c:3518) [ 103.610938][ T881] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484) [ 103.611098][ T881] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 103.611258][ T881] ? __lock_release (kernel/locking/lockdep.c:5525) [ 103.611412][ T881] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900) [ 103.611558][ T881] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 103.611720][ T881] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 103.611868][ T881] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900) [ 103.612021][ T881] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484) [ 103.612166][ T881] rtnetlink_rcv_msg (net/core/rtnetlink.c:6902) [ 103.612321][ T881] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [ 103.612477][ T881] ? 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) [ 103.612624][ T881] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 103.612752][ T881] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 103.612898][ T881] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 103.613044][ T881] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [ 103.613196][ T881] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 103.613345][ T881] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 103.613503][ T881] ? 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) [ 103.613649][ T881] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 103.613814][ T881] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 103.613968][ T881] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 103.614118][ T881] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 103.614275][ T881] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 103.614423][ T881] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 103.614577][ T881] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 103.614728][ T881] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 103.614921][ T881] ___sys_sendmsg (net/socket.c:2650) [ 103.615080][ T881] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 103.615226][ T881] ? kasan_save_stack (mm/kasan/common.c:49) [ 103.615388][ T881] ? kasan_save_stack (mm/kasan/common.c:48) [ 103.615546][ T881] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 103.615693][ T881] ? __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) [ 103.615886][ T881] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 103.616048][ T881] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 103.616194][ T881] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 103.616389][ T881] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 103.616545][ T881] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 103.616694][ T881] ? __lock_release (kernel/locking/lockdep.c:5525) [ 103.616839][ T881] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 103.617018][ T881] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 103.617182][ T881] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 103.617332][ T881] __sys_sendmsg (net/socket.c:2680) [ 103.617477][ T881] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 103.617632][ T881] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 103.617827][ T881] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 103.617973][ T881] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 103.618162][ T881] RIP: 0033:0x7f595f7ca9a7 [ 103.618335][ T881] 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) [ 103.618856][ T881] RSP: 002b:00007ffc4ab12b68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 103.619088][ T881] RAX: ffffffffffffffda RBX: 00007ffc4ab13290 RCX: 00007f595f7ca9a7 [ 103.619322][ T881] RDX: 0000000000000000 RSI: 00007ffc4ab12bd0 RDI: 0000000000000005 [ 103.619565][ T881] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 103.619799][ T881] R10: 00007f595f688ef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain