====================================== | [901.329442][T10538] #0: ffffffffb3be7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3521) | [901.329742][T10538] #1: ffffffffb3bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 901.330095][T10538] | [ 901.330095][T10538] stack backtrace: [ 901.330568][T10538] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 901.330761][T10538] Call Trace: [ 901.330887][T10538] [901.330974][T10538] dump_stack_lvl (lib/dump_stack.c:123) [901.331159][T10538] print_deadlock_bug (kernel/locking/lockdep.c:3040) [901.331322][T10538] validate_chain (kernel/locking/lockdep.c:3894) [901.331487][T10538] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [901.331645][T10538] ? 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) [901.331800][T10538] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [901.331939][T10538] __lock_acquire (kernel/locking/lockdep.c:5226) [901.332114][T10538] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [901.332269][T10538] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [901.332457][T10538] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [901.332645][T10538] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [901.332796][T10538] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [901.332964][T10538] ? lock_acquire (kernel/locking/lockdep.c:5822) [901.333125][T10538] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [901.333323][T10538] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [901.333441][T10538] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [901.333629][T10538] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [901.333777][T10538] ? __lock_release (kernel/locking/lockdep.c:5525) [901.333927][T10538] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [901.334086][T10538] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [901.334245][T10538] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [901.334407][T10538] __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)) [901.334565][T10538] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [901.334763][T10538] ? __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) [901.334923][T10538] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [901.335128][T10538] ? rtnl_is_locked (net/core/rtnetlink.c:163) [901.335284][T10538] netdev_upper_dev_unlink (net/core/dev.c:8190) [901.335438][T10538] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [901.335628][T10538] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [901.335784][T10538] ? 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) [901.335942][T10538] ? rtnl_is_locked (net/core/rtnetlink.c:163) [901.336094][T10538] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [901.336296][T10538] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [901.336454][T10538] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [901.336607][T10538] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [901.336762][T10538] unregister_netdevice_many_notify (net/core/dev.c:11575) [901.336950][T10538] ? 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) [901.337116][T10538] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [901.337237][T10538] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [901.337419][T10538] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [901.337630][T10538] ? kfree (mm/slub.c:4613 mm/slub.c:4761) [901.337756][T10538] ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387) [901.337913][T10538] ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387) [901.338105][T10538] rtnl_dellink (net/core/rtnetlink.c:3487 net/core/rtnetlink.c:3527) [901.338266][T10538] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [901.338431][T10538] ? find_held_lock (kernel/locking/lockdep.c:5339) [901.338590][T10538] ? __lock_release (kernel/locking/lockdep.c:5525) [901.338736][T10538] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [901.338882][T10538] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [901.339027][T10538] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [901.339191][T10538] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [901.339340][T10538] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [901.339491][T10538] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [901.339637][T10538] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [901.339787][T10538] ? 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) [901.339939][T10538] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [901.340061][T10538] ? __lock_acquire (kernel/locking/lockdep.c:5226) [901.340219][T10538] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [901.340392][T10538] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [901.340538][T10538] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [901.340686][T10538] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [901.340847][T10538] ? 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) [901.340995][T10538] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [901.341201][T10538] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [901.341431][T10538] ? find_held_lock (kernel/locking/lockdep.c:5339) [901.341671][T10538] netlink_sendmsg (net/netlink/af_netlink.c:1892) [901.341927][T10538] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [901.342103][T10538] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [901.342253][T10538] ? __pfx_____sys_sendmsg (net/socket.c:2540) [901.342398][T10538] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [901.342628][T10538] ___sys_sendmsg (net/socket.c:2650) [901.342834][T10538] ? __pfx____sys_sendmsg (net/socket.c:2637) [901.342993][T10538] ? kasan_save_stack (mm/kasan/common.c:49) [901.343211][T10538] ? kasan_save_stack (mm/kasan/common.c:48) [901.343364][T10538] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [901.343557][T10538] ? __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) [901.343855][T10538] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [901.344028][T10538] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [901.344228][T10538] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [901.344435][T10538] ? __lock_acquire (kernel/locking/lockdep.c:5226) [901.344651][T10538] ? find_held_lock (kernel/locking/lockdep.c:5339) [901.344803][T10538] ? __lock_release (kernel/locking/lockdep.c:5525) [901.344948][T10538] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [901.345099][T10538] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [901.345247][T10538] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [901.345397][T10538] __sys_sendmsg (net/socket.c:2680) [901.345557][T10538] ? __pfx___sys_sendmsg (net/socket.c:2665) [901.345716][T10538] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [901.345907][T10538] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [901.346055][T10538] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 901.346237][T10538] RIP: 0033:0x7f59a59de9a7 [ 901.346396][T10538] 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) [ 901.346989][T10538] RSP: 002b:00007ffd9885ee08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 901.347263][T10538] RAX: ffffffffffffffda RBX: 00007ffd9885f530 RCX: 00007f59a59de9a7 [ 901.347537][T10538] RDX: 0000000000000000 RSI: 00007ffd9885ee70 RDI: 0000000000000005 [ 901.347897][T10538] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 901.348222][T10538] R10: 00007f59a589cef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain