====================================== | [ 12.315775][ T269] #0: ffffffffa3e01dc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3521) | [ 12.316195][ T269] #1: ffffffffa3df0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 12.316668][ T269] | [ 12.316668][ T269] stack backtrace: [ 12.317313][ T269] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.317609][ T269] Call Trace: [ 12.317788][ T269] [ 12.317913][ T269] dump_stack_lvl (lib/dump_stack.c:123) [ 12.318156][ T269] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 12.318399][ T269] validate_chain (kernel/locking/lockdep.c:3894) [ 12.318637][ T269] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 12.318875][ T269] ? 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) [ 12.319113][ T269] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 12.319300][ T269] __lock_acquire (kernel/locking/lockdep.c:5226) [ 12.319541][ T269] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 12.319775][ T269] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.320067][ T269] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.320308][ T269] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 12.320545][ T269] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 12.320782][ T269] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.321072][ T269] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 12.321255][ T269] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.321545][ T269] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 12.321780][ T269] ? 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) [ 12.322020][ T269] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 12.322256][ T269] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 12.322491][ T269] __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)) [ 12.322727][ T269] ? __lock_release (kernel/locking/lockdep.c:5525) [ 12.322962][ T269] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151) [ 12.323256][ T269] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 12.323499][ T269] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 12.323797][ T269] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 12.324102][ T269] netdev_upper_dev_unlink (net/core/dev.c:8190) [ 12.324337][ T269] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190) [ 12.324630][ T269] macvlan_device_event (drivers/net/macvlan.c:1829 (discriminator 3)) [ 12.324877][ T269] ? __pfx_macvlan_device_event (drivers/net/macvlan.c:1779) [ 12.325120][ T269] ? __timer_delete_sync (kernel/time/timer.c:1648 (discriminator 1)) [ 12.325359][ T269] ? ipmr_device_event (net/ipv4/ipmr.c:1781) [ 12.325597][ T269] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 12.325839][ T269] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 12.326075][ T269] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 12.326375][ T269] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 12.326667][ T269] ? rtnl_dellink (net/core/rtnetlink.c:3521) [ 12.326905][ T269] ? sock_def_readable (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/sock.c:3479) [ 12.327141][ T269] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 12.327381][ T269] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 12.327615][ T269] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 12.327914][ T269] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 12.328207][ T269] ? __nla_validate_parse (./include/net/netlink.h:1270 (discriminator 1) lib/nlattr.c:622 (discriminator 1)) [ 12.328451][ T269] rtnl_dellink (net/core/rtnetlink.c:3487 net/core/rtnetlink.c:3527) [ 12.328690][ T269] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 12.328951][ T269] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 12.329191][ T269] ? __lock_release (kernel/locking/lockdep.c:5525) [ 12.329429][ T269] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 12.329671][ T269] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 12.329907][ T269] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.330147][ T269] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909) [ 12.330387][ T269] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493) [ 12.330626][ T269] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911) [ 12.330863][ T269] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 12.331102][ T269] ? 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) [ 12.331338][ T269] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 12.331521][ T269] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 12.331761][ T269] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 12.331998][ T269] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814) [ 12.332235][ T269] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 12.332480][ T269] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 12.332714][ T269] ? 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) [ 12.332957][ T269] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 12.333194][ T269] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 12.333434][ T269] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 12.333673][ T269] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 12.333909][ T269] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 12.334149][ T269] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594) [ 12.334386][ T269] ? __pfx_____sys_sendmsg (net/socket.c:2540) [ 12.334619][ T269] ? __pfx_copy_msghdr_from_user (net/socket.c:2520) [ 12.334927][ T269] ___sys_sendmsg (net/socket.c:2650) [ 12.335164][ T269] ? __pfx____sys_sendmsg (net/socket.c:2637) [ 12.335410][ T269] ? kasan_save_stack (mm/kasan/common.c:49) [ 12.335645][ T269] ? kasan_save_stack (mm/kasan/common.c:48) [ 12.335877][ T269] ? __kasan_record_aux_stack (mm/kasan/generic.c:544) [ 12.336109][ T269] ? __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) [ 12.336398][ T269] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 12.336634][ T269] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 12.336867][ T269] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 12.337169][ T269] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 12.337409][ T269] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 12.337644][ T269] ? __lock_release (kernel/locking/lockdep.c:5525) [ 12.337877][ T269] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65) [ 12.338114][ T269] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 12.338348][ T269] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 12.338580][ T269] __sys_sendmsg (net/socket.c:2680) [ 12.338822][ T269] ? __pfx___sys_sendmsg (net/socket.c:2665) [ 12.339056][ T269] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643) [ 12.339361][ T269] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 12.339597][ T269] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 12.339891][ T269] RIP: 0033:0x7f83efb349a7 [ 12.340139][ T269] 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) [ 12.340957][ T269] RSP: 002b:00007fff00d75728 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 12.341318][ T269] RAX: ffffffffffffffda RBX: 00007fff00d75e50 RCX: 00007f83efb349a7 [ 12.341670][ T269] RDX: 0000000000000000 RSI: 00007fff00d75790 RDI: 0000000000000005 [ 12.342028][ T269] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078 [ 12.342375][ T269] R10: 00007f83ef9f2ef8 R11: 0000000000000246 R12: 0000000000000001 Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain