====================================== | [ 78.870859][ T622] #0: ffffffff8e3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3512) | [ 78.871122][ T622] #1: ffffffff8e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 78.871418][ T622] | [ 78.871418][ T622] stack backtrace: [ 78.871824][ T622] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 78.872003][ T622] Call Trace: [ 78.872114][ T622] [ 78.872191][ T622] dump_stack_lvl (lib/dump_stack.c:123) [ 78.872347][ T622] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 78.872493][ T622] validate_chain (kernel/locking/lockdep.c:3894) [ 78.872653][ T622] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 78.872800][ T622] ? 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) [ 78.872944][ T622] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 78.873056][ T622] __lock_acquire (kernel/locking/lockdep.c:5226) [ 78.873202][ T622] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 78.873345][ T622] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 78.873529][ T622] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [ 78.873712][ T622] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 78.873858][ T622] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 78.874005][ T622] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 78.874158][ T622] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 78.874339][ T622] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 78.874455][ T622] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 78.874640][ T622] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 78.874784][ T622] ? __lock_release (kernel/locking/lockdep.c:5525) [ 78.874929][ T622] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 78.875074][ T622] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 78.875222][ T622] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 78.875377][ T622] __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)) [ 78.875528][ T622] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 78.875706][ T622] ? __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) [ 78.875854][ T622] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [ 78.876033][ T622] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 78.876179][ T622] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 78.876324][ T622] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 78.876517][ T622] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 78.876665][ T622] ? 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) [ 78.876818][ T622] ? rtnl_is_locked (net/core/rtnetlink.c:164) [ 78.876964][ T622] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 78.877143][ T622] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [ 78.877290][ T622] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 78.877447][ T622] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 78.877594][ T622] unregister_netdevice_many_notify (net/core/dev.c:11571) [ 78.877778][ T622] ? __lock_release (kernel/locking/lockdep.c:5525) [ 78.877933][ T622] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 78.878079][ T622] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11512) [ 78.878268][ T622] ? 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) [ 78.878413][ T622] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 78.878567][ T622] ? __pfx_vlan_info_rcu_free (net/8021q/vlan_core.c:145) [ 78.878717][ T622] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 78.878898][ T622] rtnl_dellink (net/core/rtnetlink.c:3478 net/core/rtnetlink.c:3518) [ 78.879053][ T622] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484) [ 78.879210][ T622] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 78.879356][ T622] ? __lock_release (kernel/locking/lockdep.c:5525) [ 78.879500][ T622] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900) [ 78.879643][ T622] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 78.879787][ T622] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 78.879939][ T622] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900) [ 78.880093][ T622] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484) [ 78.880240][ T622] rtnetlink_rcv_msg (net/core/rtnetlink.c:6902) [ 78.880384][ T622] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [ 78.880530][ T622] ? 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) [ 78.880680][ T622] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 78.880792][ T622] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 78.880943][ T622] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 78.881090][ T622] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805) [ 78.881248][ T622] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 78.881396][ T622] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 78.881543][ T622] ? 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) [ 78.881689][ T622] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 78.881845][ T622] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 78.881996][ T622] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 78.882157][ T622] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 78.882313][ T622] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 78.882460][ T622] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 78.882605][ T622] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 78.882748][ T622] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 78.882934][ T622] ___sys_sendmsg (net/socket.c:2650) [ 78.883095][ T622] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 78.883241][ T622] ? kasan_save_stack (mm/kasan/common.c:49) [ 78.883386][ T622] ? kasan_save_stack (mm/kasan/common.c:48) [ 78.883540][ T622] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 78.883684][ T622] ? __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) [ 78.883867][ T622] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 78.884013][ T622] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 78.884164][ T622] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 78.884345][ T622] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 78.884500][ T622] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 78.884654][ T622] ? __lock_release (kernel/locking/lockdep.c:5525) [ 78.884797][ T622] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 78.884942][ T622] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 78.885100][ T622] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 78.885253][ T622] __sys_sendmsg (net/socket.c:2680) [ 78.885397][ T622] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 78.885545][ T622] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 78.885730][ T622] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 78.885876][ T622] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 78.886054][ T622] RIP: 0033:0x7fd2bb3959a7 [ 78.886207][ T622] 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) [ 78.886722][ T622] RSP: 002b:00007ffd94597f68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 78.886941][ T622] RAX: ffffffffffffffda RBX: 00007ffd94598690 RCX: 00007fd2bb3959a7 [ 78.887159][ T622] RDX: 0000000000000000 RSI: 00007ffd94597fd0 RDI: 0000000000000005 [ 78.887400][ T622] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 78.887633][ T622] R10: 00007fd2bb253ef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain