====================================== | [797.978436][T11951] #0: ffffffffaabe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3521) | [797.978717][T11951] #1: ffffffffaabd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 797.979018][T11951] | [ 797.979018][T11951] stack backtrace: [ 797.979420][T11951] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 797.979614][T11951] Call Trace: [ 797.979726][T11951] [797.979804][T11951] dump_stack_lvl (lib/dump_stack.c:123) [797.979957][T11951] print_deadlock_bug (kernel/locking/lockdep.c:3040) [797.980110][T11951] validate_chain (kernel/locking/lockdep.c:3894) [797.980265][T11951] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [797.980416][T11951] ? 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) [797.980563][T11951] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [797.980678][T11951] __lock_acquire (kernel/locking/lockdep.c:5226) [797.980828][T11951] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [797.980973][T11951] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [797.981157][T11951] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [797.981354][T11951] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [797.981501][T11951] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [797.981654][T11951] ? lock_acquire (kernel/locking/lockdep.c:5822) [797.981806][T11951] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [797.982002][T11951] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [797.982117][T11951] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [797.982302][T11951] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [797.982458][T11951] ? __lock_release (kernel/locking/lockdep.c:5525) [797.982607][T11951] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [797.982756][T11951] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [797.982909][T11951] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [797.983061][T11951] __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)) [797.983215][T11951] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [797.983401][T11951] ? __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) [797.983557][T11951] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [797.983740][T11951] ? rtnl_is_locked (net/core/rtnetlink.c:163) [797.983889][T11951] netdev_upper_dev_unlink (net/core/dev.c:8190) [797.984033][T11951] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [797.984216][T11951] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [797.984361][T11951] ? 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) [797.984510][T11951] ? rtnl_is_locked (net/core/rtnetlink.c:163) [797.984663][T11951] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [797.984842][T11951] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [797.984995][T11951] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [797.985154][T11951] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [797.985300][T11951] unregister_netdevice_many_notify (net/core/dev.c:11575) [797.985481][T11951] ? 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) [797.985640][T11951] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [797.985758][T11951] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [797.985940][T11951] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [797.986123][T11951] ? kfree (mm/slub.c:4613 mm/slub.c:4761) [797.986244][T11951] ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387) [797.986413][T11951] ? vlan_vid_del (net/8021q/vlan_core.c:368 net/8021q/vlan_core.c:387) [797.986559][T11951] rtnl_dellink (net/core/rtnetlink.c:3487 net/core/rtnetlink.c:3527) [797.986707][T11951] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [797.986870][T11951] ? find_held_lock (kernel/locking/lockdep.c:5339) [797.987026][T11951] ? __lock_release (kernel/locking/lockdep.c:5525) [797.987172][T11951] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [797.987324][T11951] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [797.987492][T11951] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [797.987641][T11951] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [797.987793][T11951] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [797.987940][T11951] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [797.988092][T11951] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [797.988263][T11951] ? 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) [797.988406][T11951] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [797.988518][T11951] ? __lock_acquire (kernel/locking/lockdep.c:5226) [797.988679][T11951] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [797.988824][T11951] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [797.988969][T11951] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [797.989134][T11951] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [797.989284][T11951] ? 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) [797.989431][T11951] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [797.989585][T11951] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [797.989728][T11951] ? find_held_lock (kernel/locking/lockdep.c:5339) [797.989875][T11951] netlink_sendmsg (net/netlink/af_netlink.c:1892) [797.990021][T11951] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [797.990174][T11951] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [797.990320][T11951] ? __pfx_____sys_sendmsg (net/socket.c:2540) [797.990467][T11951] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [797.990654][T11951] ___sys_sendmsg (net/socket.c:2650) [797.990799][T11951] ? __pfx____sys_sendmsg (net/socket.c:2637) [797.990945][T11951] ? kasan_save_stack (mm/kasan/common.c:49) [797.991093][T11951] ? kasan_save_stack (mm/kasan/common.c:48) [797.991244][T11951] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [797.991397][T11951] ? __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) [797.991583][T11951] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [797.991729][T11951] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [797.991875][T11951] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [797.992087][T11951] ? __lock_acquire (kernel/locking/lockdep.c:5226) [797.992240][T11951] ? find_held_lock (kernel/locking/lockdep.c:5339) [797.992386][T11951] ? __lock_release (kernel/locking/lockdep.c:5525) [797.992543][T11951] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [797.992696][T11951] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [797.992842][T11951] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [797.992993][T11951] __sys_sendmsg (net/socket.c:2680) [797.993145][T11951] ? __pfx___sys_sendmsg (net/socket.c:2665) [797.993297][T11951] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [797.993500][T11951] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [797.993651][T11951] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 797.993837][T11951] RIP: 0033:0x7f096f3ac9a7 [ 797.993994][T11951] 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) [ 797.994523][T11951] RSP: 002b:00007fffc1cca248 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 797.994756][T11951] RAX: ffffffffffffffda RBX: 00007fffc1cca970 RCX: 00007f096f3ac9a7 [ 797.994980][T11951] RDX: 0000000000000000 RSI: 00007fffc1cca2b0 RDI: 0000000000000005 [ 797.995203][T11951] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 797.995428][T11951] R10: 00007f096f26aef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain