======================================
| [ 34.140468][ T357] #0: ffffffffb2201dc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3521)
| [ 34.140733][ T357] #1: ffffffffb21f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
| [ 34.141026][ T357]
| [ 34.141026][ T357] stack backtrace:
[ 34.141417][ T357] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 34.141600][ T357] Call Trace:
[ 34.141723][ T357] <TASK>
[ 34.141803][ T357] dump_stack_lvl (lib/dump_stack.c:123)
[ 34.141960][ T357] print_deadlock_bug (kernel/locking/lockdep.c:3040)
[ 34.142115][ T357] validate_chain (kernel/locking/lockdep.c:3894)
[ 34.142262][ T357] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860)
[ 34.142411][ T357] ? 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)
[ 34.142559][ T357] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 34.142675][ T357] __lock_acquire (kernel/locking/lockdep.c:5226)
[ 34.142823][ T357] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 34.142969][ T357] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 34.143150][ T357] ? __kasan_slab_free (mm/kasan/common.c:271)
[ 34.143296][ T357] ? kmem_cache_free (mm/slub.c:4613 mm/slub.c:4715)
[ 34.143443][ T357] ? remove_proc_entry (fs/proc/generic.c:686)
[ 34.143591][ T357] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 34.143739][ T357] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 34.143888][ T357] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 34.144034][ T357] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 34.144212][ T357] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526)
[ 34.144327][ T357] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 34.144515][ T357] ? __pfx_down_read (kernel/locking/rwsem.c:1522)
[ 34.144664][ T357] ? __debug_check_no_obj_freed (lib/debugobjects.c:1110)
[ 34.144856][ T357] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 34.145005][ T357] __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))
[ 34.145154][ T357] ? mark_held_locks (kernel/locking/lockdep.c:4321)
[ 34.145302][ T357] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151)
[ 34.145483][ T357] ? unregister_netdevice_queue (net/core/dev.c:11501)
[ 34.145668][ T357] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500)
[ 34.145862][ T357] ? remove_proc_entry (fs/proc/generic.c:686)
[ 34.146023][ T357] netdev_upper_dev_unlink (net/core/dev.c:8190)
[ 34.146167][ T357] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190)
[ 34.146346][ T357] macvlan_device_event (drivers/net/macvlan.c:1829 (discriminator 3))
[ 34.146515][ T357] ? __pfx_macvlan_device_event (drivers/net/macvlan.c:1779)
[ 34.146664][ T357] ? bond_remove_proc_entry (drivers/net/bonding/bond_procfs.c:307)
[ 34.146816][ T357] notifier_call_chain (kernel/notifier.c:85 (discriminator 2))
[ 34.146973][ T357] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368)
[ 34.147129][ T357] unregister_netdevice_many_notify (net/core/dev.c:11575)
[ 34.147309][ T357] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516)
[ 34.147489][ T357] ? rtnl_dellink (net/core/rtnetlink.c:3521)
[ 34.147634][ T357] ? sock_def_readable (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/sock.c:3479)
[ 34.147788][ T357] ? __pfx___mutex_lock (kernel/locking/mutex.c:734)
[ 34.147933][ T357] ? rtnl_is_locked (net/core/rtnetlink.c:163)
[ 34.148074][ T357] ? unregister_netdevice_queue (net/core/dev.c:11501)
[ 34.148253][ T357] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500)
[ 34.148433][ T357] ? __nla_validate_parse (./include/net/netlink.h:1270 (discriminator 1) lib/nlattr.c:622 (discriminator 1))
[ 34.148588][ T357] rtnl_dellink (net/core/rtnetlink.c:3487 net/core/rtnetlink.c:3527)
[ 34.148736][ T357] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493)
[ 34.148895][ T357] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 34.149048][ T357] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 34.149196][ T357] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909)
[ 34.149345][ T357] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 34.149488][ T357] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 34.149634][ T357] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6909)
[ 34.149791][ T357] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3493)
[ 34.149950][ T357] rtnetlink_rcv_msg (net/core/rtnetlink.c:6911)
[ 34.150110][ T357] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814)
[ 34.150279][ T357] ? 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)
[ 34.150436][ T357] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 34.150557][ T357] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 34.150715][ T357] netlink_rcv_skb (net/netlink/af_netlink.c:2543)
[ 34.150871][ T357] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6814)
[ 34.151028][ T357] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520)
[ 34.151190][ T357] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340)
[ 34.151355][ T357] ? 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)
[ 34.151513][ T357] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348)
[ 34.151682][ T357] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333)
[ 34.151847][ T357] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 34.152004][ T357] netlink_sendmsg (net/netlink/af_netlink.c:1892)
[ 34.152163][ T357] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811)
[ 34.152323][ T357] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594)
[ 34.152489][ T357] ? __pfx_____sys_sendmsg (net/socket.c:2540)
[ 34.152647][ T357] ? __pfx_copy_msghdr_from_user (net/socket.c:2520)
[ 34.152848][ T357] ___sys_sendmsg (net/socket.c:2650)
[ 34.153011][ T357] ? __pfx____sys_sendmsg (net/socket.c:2637)
[ 34.153169][ T357] ? kasan_save_stack (mm/kasan/common.c:49)
[ 34.153327][ T357] ? kasan_save_stack (mm/kasan/common.c:48)
[ 34.153479][ T357] ? __kasan_record_aux_stack (mm/kasan/generic.c:544)
[ 34.153636][ T357] ? __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)
[ 34.153825][ T357] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539)
[ 34.153972][ T357] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 34.154120][ T357] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 34.154302][ T357] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 34.154450][ T357] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 34.154593][ T357] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 34.154738][ T357] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65)
[ 34.154891][ T357] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 34.155037][ T357] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 34.155183][ T357] __sys_sendmsg (net/socket.c:2680)
[ 34.155327][ T357] ? __pfx___sys_sendmsg (net/socket.c:2665)
[ 34.155472][ T357] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643)
[ 34.155657][ T357] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 34.155805][ T357] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 34.155998][ T357] RIP: 0033:0x7f9c7c7419a7
[ 34.156167][ T357] 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)
[ 34.156719][ T357] RSP: 002b:00007ffccb7b25b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 34.156965][ T357] RAX: ffffffffffffffda RBX: 00007ffccb7b2cf0 RCX: 00007f9c7c7419a7
[ 34.157204][ T357] RDX: 0000000000000000 RSI: 00007ffccb7b2620 RDI: 0000000000000005
[ 34.157443][ T357] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[ 34.157679][ T357] R10: 00007f9c7c5ff4a8 R11: 0000000000000246 R12: 0000000000000001
Finger prints:
print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain