====================================== | [ 224.230661][ T2331] #0: ffffffffaade7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3521) | [ 224.230932][ T2331] #1: ffffffffaadd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 224.231229][ T2331] | [ 224.231229][ T2331] stack backtrace: [ 224.231646][ T2331] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 224.231829][ T2331] Call Trace: [ 224.231941][ T2331] [ 224.232020][ T2331] dump_stack_lvl (lib/dump_stack.c:123) [ 224.232176][ T2331] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 224.232331][ T2331] validate_chain (kernel/locking/lockdep.c:3894) [ 224.232481][ T2331] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 224.232631][ T2331] ? 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) [ 224.232786][ T2331] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 224.232897][ T2331] __lock_acquire (kernel/locking/lockdep.c:5226) [ 224.233046][ T2331] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 224.233193][ T2331] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 224.233379][ T2331] ? netconsole_process_cleanups_core (drivers/net/netconsole.c:242 (discriminator 11)) [ 224.233566][ T2331] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 224.233714][ T2331] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 224.233869][ T2331] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 224.234016][ T2331] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 224.234200][ T2331] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 224.234317][ T2331] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 224.234503][ T2331] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 224.234668][ T2331] ? __lock_release (kernel/locking/lockdep.c:5525) [ 224.234813][ T2331] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 224.234960][ T2331] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 224.235127][ T2331] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 224.235276][ T2331] __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)) [ 224.235427][ T2331] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 224.235609][ T2331] ? __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) [ 224.235757][ T2331] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:890) [ 224.235938][ T2331] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 224.236093][ T2331] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 224.236242][ T2331] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 224.236427][ T2331] ? netconsole_netdev_event (drivers/net/netconsole.c:1082) [ 224.236573][ T2331] ? 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) [ 224.236720][ T2331] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 224.236868][ T2331] ? netdev_master_upper_dev_get (net/core/dev.c:7230) [ 224.237048][ T2331] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804) vrf [ 224.237206][ T2331] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 224.237358][ T2331] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 224.237508][ T2331] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 224.237693][ T2331] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 224.237877][ T2331] ? rtnl_dellink (net/core/rtnetlink.c:3521) [ 224.238024][ T2331] ? sock_def_readable (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/sock.c:3479) [ 224.238175][ T2331] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 224.238326][ T2331] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 224.238473][ T2331] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 224.238655][ T2331] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 224.238836][ T2331] ? __nla_validate_parse (./include/net/netlink.h:1270 (discriminator 1) lib/nlattr.c:622 (discriminator 1)) [ 224.238986][ T2331] rtnl_dellink (net/core/rtnetlink.c:3487 net/core/rtnetlink.c:3527) [ 224.239135][ T2331] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 224.239296][ T2331] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 224.239449][ T2331] ? __lock_release (kernel/locking/lockdep.c:5525) [ 224.239596][ T2331] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 224.239743][ T2331] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 224.239891][ T2331] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 224.240041][ T2331] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 224.240187][ T2331] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 224.240339][ T2331] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 224.240489][ T2331] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 224.240636][ T2331] ? 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) [ 224.240784][ T2331] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 224.240896][ T2331] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 224.241046][ T2331] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 224.241196][ T2331] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 224.241347][ T2331] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 224.241503][ T2331] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 224.241652][ T2331] ? 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) [ 224.241798][ T2331] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 224.241944][ T2331] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 224.242089][ T2331] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 224.242238][ T2331] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 224.242385][ T2331] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 224.242536][ T2331] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 224.242683][ T2331] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 224.242831][ T2331] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 224.243015][ T2331] ___sys_sendmsg (net/socket.c:2650) [ 224.243164][ T2331] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 224.243313][ T2331] ? kasan_save_stack (mm/kasan/common.c:49) [ 224.243460][ T2331] ? kasan_save_stack (mm/kasan/common.c:48) [ 224.243609][ T2331] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 224.243758][ T2331] ? __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) [ 224.243942][ T2331] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 224.244090][ T2331] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 224.244240][ T2331] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 224.244430][ T2331] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 224.244580][ T2331] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 224.244728][ T2331] ? __lock_release (kernel/locking/lockdep.c:5525) [ 224.244884][ T2331] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 224.245034][ T2331] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 224.245196][ T2331] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 224.245348][ T2331] __sys_sendmsg (net/socket.c:2680) [ 224.245497][ T2331] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 224.245644][ T2331] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 224.245840][ T2331] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 224.245987][ T2331] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 224.246169][ T2331] RIP: 0033:0x7f1783aa59a7 [ 224.246332][ T2331] 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) [ 224.246849][ T2331] RSP: 002b:00007fff42315808 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 224.247074][ T2331] RAX: ffffffffffffffda RBX: 00007fff42315f30 RCX: 00007f1783aa59a7 [ 224.247301][ T2331] RDX: 0000000000000000 RSI: 00007fff42315870 RDI: 0000000000000005 [ 224.247545][ T2331] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 224.247770][ T2331] R10: 00007f1783963ef8 R11: 0000000000000246 R12: 0000000000000002 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain