====================================== | [ 99.590077][ T743] #0: ffffffff89fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3521) | [ 99.590495][ T743] #1: ffffffff89fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 99.590968][ T743] | [ 99.590968][ T743] stack backtrace: [ 99.591589][ T743] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 99.591867][ T743] Call Trace: [ 99.592039][ T743] [ 99.592160][ T743] dump_stack_lvl (lib/dump_stack.c:123) [ 99.592395][ T743] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 99.592634][ T743] validate_chain (kernel/locking/lockdep.c:3894) [ 99.592869][ T743] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 99.593098][ T743] ? 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) [ 99.593334][ T743] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 99.593509][ T743] __lock_acquire (kernel/locking/lockdep.c:5226) [ 99.593743][ T743] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 99.593974][ T743] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 99.594260][ T743] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [ 99.594555][ T743] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 99.594790][ T743] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 99.595003][ T743] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 99.595219][ T743] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 99.595493][ T743] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 99.595654][ T743] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 99.595839][ T743] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 99.596042][ T743] ? __lock_release (kernel/locking/lockdep.c:5525) [ 99.596236][ T743] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 99.596443][ T743] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 99.596682][ T743] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 99.596911][ T743] __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)) [ 99.597138][ T743] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 99.597435][ T743] ? __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) [ 99.597665][ T743] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [ 99.597959][ T743] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 99.598192][ T743] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 99.598419][ T743] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 99.598701][ T743] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 99.598931][ T743] ? 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) [ 99.599167][ T743] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 99.599393][ T743] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 99.599674][ T743] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [ 99.599910][ T743] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 99.600138][ T743] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 99.600371][ T743] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 99.600665][ T743] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 99.600957][ T743] ? rtnl_dellink (net/core/rtnetlink.c:3521) [ 99.601184][ T743] ? sock_def_readable (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/sock.c:3479) [ 99.601414][ T743] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 99.601644][ T743] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 99.601869][ T743] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 99.602148][ T743] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 99.602431][ T743] ? __nla_validate_parse (./include/net/netlink.h:1270 (discriminator 1) lib/nlattr.c:622 (discriminator 1)) [ 99.602667][ T743] rtnl_dellink (net/core/rtnetlink.c:3487 net/core/rtnetlink.c:3527) [ 99.602895][ T743] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 99.603150][ T743] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 99.603379][ T743] ? __lock_release (kernel/locking/lockdep.c:5525) [ 99.603607][ T743] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 99.603831][ T743] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 99.604057][ T743] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 99.604295][ T743] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 99.604518][ T743] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 99.604745][ T743] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 99.604973][ T743] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 99.605199][ T743] ? 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) [ 99.605421][ T743] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 99.605595][ T743] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 99.605827][ T743] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 99.606043][ T743] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 99.606236][ T743] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 99.606391][ T743] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 99.606537][ T743] ? 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) [ 99.606684][ T743] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 99.606844][ T743] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 99.607050][ T743] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 99.607264][ T743] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 99.607486][ T743] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 99.607711][ T743] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 99.607938][ T743] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 99.608165][ T743] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 99.608454][ T743] ___sys_sendmsg (net/socket.c:2650) [ 99.608686][ T743] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 99.608915][ T743] ? kasan_save_stack (mm/kasan/common.c:49) [ 99.609142][ T743] ? kasan_save_stack (mm/kasan/common.c:48) [ 99.609366][ T743] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 99.609592][ T743] ? __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) [ 99.609861][ T743] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 99.610085][ T743] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 99.610310][ T743] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 99.610601][ T743] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 99.610833][ T743] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 99.611064][ T743] ? __lock_release (kernel/locking/lockdep.c:5525) [ 99.611288][ T743] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 99.611518][ T743] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 99.611739][ T743] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 99.611971][ T743] __sys_sendmsg (net/socket.c:2680) [ 99.612204][ T743] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 99.612432][ T743] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 99.612723][ T743] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 99.612950][ T743] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 99.613232][ T743] RIP: 0033:0x7f2d58df29a7 [ 99.613472][ T743] 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) [ 99.614277][ T743] RSP: 002b:00007ffe770cec88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 99.614622][ T743] RAX: ffffffffffffffda RBX: 00007ffe770cf3b0 RCX: 00007f2d58df29a7 [ 99.614961][ T743] RDX: 0000000000000000 RSI: 00007ffe770cecf0 RDI: 0000000000000005 [ 99.615308][ T743] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 99.615647][ T743] R10: 00007f2d58cb0ef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain