====================================== | [ 130.705233][ T1700] #0: ffffffffabfe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3521) | [ 130.705524][ T1700] #1: ffffffffabfd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 130.705850][ T1700] | [ 130.705850][ T1700] stack backtrace: [ 130.706393][ T1700] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 130.706603][ T1700] Call Trace: [ 130.706728][ T1700] [ 130.706831][ T1700] dump_stack_lvl (lib/dump_stack.c:123) [ 130.707051][ T1700] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 130.707211][ T1700] validate_chain (kernel/locking/lockdep.c:3894) [ 130.707424][ T1700] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 130.707597][ T1700] ? 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) [ 130.707810][ T1700] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 130.707952][ T1700] __lock_acquire (kernel/locking/lockdep.c:5226) [ 130.708114][ T1700] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 130.708274][ T1700] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 130.708477][ T1700] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [ 130.708677][ T1700] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 130.708849][ T1700] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 130.709058][ T1700] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 130.709220][ T1700] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 130.709417][ T1700] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 130.709580][ T1700] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 130.709790][ T1700] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 130.709957][ T1700] ? __lock_release (kernel/locking/lockdep.c:5525) [ 130.710122][ T1700] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 130.710281][ T1700] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 130.710441][ T1700] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 130.710601][ T1700] __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)) [ 130.710762][ T1700] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 130.710980][ T1700] ? __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) [ 130.711144][ T1700] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [ 130.711339][ T1700] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 130.711499][ T1700] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 130.711656][ T1700] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 130.711865][ T1700] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 130.712075][ T1700] ? 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) [ 130.712233][ T1700] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 130.712407][ T1700] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 130.712616][ T1700] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [ 130.712813][ T1700] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 130.713034][ T1700] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 130.713240][ T1700] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 130.713488][ T1700] ? __lock_release (kernel/locking/lockdep.c:5525) [ 130.713713][ T1700] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 130.713956][ T1700] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 130.714255][ T1700] ? 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) [ 130.714506][ T1700] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 130.714749][ T1700] ? __pfx_vlan_info_rcu_free (net/8021q/vlan_core.c:145) [ 130.714991][ T1700] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 130.715240][ T1700] rtnl_dellink (net/core/rtnetlink.c:3487 net/core/rtnetlink.c:3527) [ 130.715404][ T1700] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 130.715583][ T1700] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 130.715743][ T1700] ? __lock_release (kernel/locking/lockdep.c:5525) [ 130.715941][ T1700] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 130.716118][ T1700] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 130.716279][ T1700] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 130.716441][ T1700] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 130.716598][ T1700] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 130.716764][ T1700] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 130.716932][ T1700] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 130.717091][ T1700] ? 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) [ 130.717247][ T1700] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 130.717370][ T1700] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 130.717529][ T1700] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 130.717687][ T1700] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 130.717860][ T1700] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 130.718022][ T1700] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 130.718182][ T1700] ? 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) [ 130.718344][ T1700] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 130.718501][ T1700] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 130.718657][ T1700] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 130.718816][ T1700] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 130.719004][ T1700] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 130.719212][ T1700] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 130.719373][ T1700] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 130.719531][ T1700] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 130.719771][ T1700] ___sys_sendmsg (net/socket.c:2650) [ 130.719958][ T1700] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 130.720120][ T1700] ? kasan_save_stack (mm/kasan/common.c:49) [ 130.720288][ T1700] ? kasan_save_stack (mm/kasan/common.c:48) [ 130.720445][ T1700] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 130.720604][ T1700] ? __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) [ 130.720802][ T1700] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 130.721041][ T1700] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 130.721238][ T1700] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 130.721472][ T1700] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 130.721680][ T1700] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 130.721864][ T1700] ? __lock_release (kernel/locking/lockdep.c:5525) [ 130.722096][ T1700] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 130.722258][ T1700] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 130.722418][ T1700] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 130.722577][ T1700] __sys_sendmsg (net/socket.c:2680) [ 130.722738][ T1700] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 130.722948][ T1700] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 130.723216][ T1700] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 130.723498][ T1700] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 130.723687][ T1700] RIP: 0033:0x7fa63b3069a7 [ 130.723856][ T1700] 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) [ 130.724390][ T1700] RSP: 002b:00007ffdee5d8148 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 130.724614][ T1700] RAX: ffffffffffffffda RBX: 00007ffdee5d8870 RCX: 00007fa63b3069a7 [ 130.724839][ T1700] RDX: 0000000000000000 RSI: 00007ffdee5d81b0 RDI: 0000000000000005 [ 130.725074][ T1700] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 130.725298][ T1700] R10: 00007fa63b1c4ef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain