====================================== | [ 32.510670][ T417] #0: ffffffffb5de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3512) | [ 32.510936][ T417] #1: ffffffffb5dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 32.511233][ T417] | [ 32.511233][ T417] stack backtrace: [ 32.511625][ T417] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.511805][ T417] Call Trace: [ 32.511915][ T417] [ 32.511992][ T417] dump_stack_lvl (lib/dump_stack.c:123) [ 32.512146][ T417] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 32.512292][ T417] validate_chain (kernel/locking/lockdep.c:3894) [ 32.512438][ T417] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 32.512585][ T417] ? 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) [ 32.512729][ T417] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 32.512839][ T417] __lock_acquire (kernel/locking/lockdep.c:5226) [ 32.512985][ T417] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 32.513155][ T417] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 32.513341][ T417] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [ 32.513523][ T417] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 32.513668][ T417] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 32.513814][ T417] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 32.513956][ T417] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 32.514137][ T417] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 32.514248][ T417] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 32.514433][ T417] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 32.514577][ T417] ? __lock_release (kernel/locking/lockdep.c:5525) [ 32.514721][ T417] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 32.514866][ T417] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 32.515012][ T417] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 32.515156][ T417] __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)) [ 32.515306][ T417] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 32.515495][ T417] ? __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) [ 32.515655][ T417] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [ 32.515836][ T417] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 32.515982][ T417] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 32.516128][ T417] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 32.516306][ T417] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 32.516456][ T417] ? 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) [ 32.516600][ T417] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 32.516745][ T417] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 32.516922][ T417] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [ 32.517069][ T417] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 32.517215][ T417] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 32.517361][ T417] unregister_netdevice_many_notify (net/core/dev.c:11571) [ 32.517546][ T417] ? __lock_release (kernel/locking/lockdep.c:5525) [ 32.517692][ T417] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 32.517840][ T417] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11512) [ 32.518021][ T417] ? 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) [ 32.518166][ T417] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 32.518309][ T417] ? __pfx_vlan_info_rcu_free (net/8021q/vlan_core.c:145) [ 32.518457][ T417] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 32.518649][ T417] rtnl_dellink (net/core/rtnetlink.c:3478 net/core/rtnetlink.c:3518) [ 32.518794][ T417] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484) [ 32.518951][ T417] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 32.519097][ T417] ? __lock_release (kernel/locking/lockdep.c:5525) [ 32.519241][ T417] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900) [ 32.519383][ T417] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 32.519527][ T417] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 32.519681][ T417] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900) [ 32.519824][ T417] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484) [ 32.519970][ T417] rtnetlink_rcv_msg (net/core/rtnetlink.c:6902) [ 32.520115][ T417] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [ 32.520261][ T417] ? 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) [ 32.520404][ T417] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 32.520524][ T417] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 32.520686][ T417] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 32.520832][ T417] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [ 32.520976][ T417] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 32.521125][ T417] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 32.521270][ T417] ? 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) [ 32.521418][ T417] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 32.521561][ T417] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 32.521711][ T417] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 32.521856][ T417] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 32.522001][ T417] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 32.522148][ T417] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 32.522294][ T417] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 32.522437][ T417] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 32.522624][ T417] ___sys_sendmsg (net/socket.c:2650) [ 32.522774][ T417] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 32.522918][ T417] ? kasan_save_stack (mm/kasan/common.c:49) [ 32.523063][ T417] ? kasan_save_stack (mm/kasan/common.c:48) [ 32.523207][ T417] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 32.523351][ T417] ? __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) [ 32.523533][ T417] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 32.523678][ T417] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 32.523823][ T417] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 32.524008][ T417] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 32.524154][ T417] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 32.524301][ T417] ? __lock_release (kernel/locking/lockdep.c:5525) [ 32.524445][ T417] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 32.524591][ T417] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 32.524734][ T417] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 32.524883][ T417] __sys_sendmsg (net/socket.c:2680) [ 32.525031][ T417] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 32.525177][ T417] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 32.525362][ T417] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 32.525517][ T417] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 32.525697][ T417] RIP: 0033:0x7fd63d4dc9a7 [ 32.525852][ T417] 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) [ 32.526367][ T417] RSP: 002b:00007ffd7ddeb4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.526592][ T417] RAX: ffffffffffffffda RBX: 00007ffd7ddebbf0 RCX: 00007fd63d4dc9a7 [ 32.526812][ T417] RDX: 0000000000000000 RSI: 00007ffd7ddeb530 RDI: 0000000000000005 [ 32.527037][ T417] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 32.527258][ T417] R10: 00007fd63d39aef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain