======================================
| [   19.317828][  T293] ==================================================================
| [   19.318132][  T293] BUG: KASAN: null-ptr-deref in try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
| [   19.318413][  T293] Write of size 8 at addr 0000000000000000 by task ip/293
| [   19.318634][  T293]
[   19.318732][  T293] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.318734][  T293] Call Trace:
[   19.318737][  T293]  <TASK>
[   19.318739][  T293]  dump_stack_lvl (lib/dump_stack.c:123)
[   19.318746][  T293]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   19.318749][  T293]  kasan_report (mm/kasan/report.c:597)
[   19.318756][  T293]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   19.318762][  T293]  kasan_check_range (mm/kasan/generic.c:194 mm/kasan/generic.c:200)
[   19.318766][  T293]  try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   19.318769][  T293]  ? page_pool_release (net/core/page_pool.c:1196)
[   19.318775][  T293]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   19.318779][  T293]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   19.318786][  T293]  __cancel_work_sync (kernel/workqueue.c:4383)
[   19.318791][  T293]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   19.318796][  T293]  ? netdev_notify_peers (net/core/dev.c:1891)
[   19.318799][  T293]  ? netif_close_many (net/core/dev.c:1959)
[   19.318803][  T293]  netif_close_many (net/core/dev.c:1959)
[   19.318807][  T293]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   19.318811][  T293]  ? __dev_close_many (net/core/dev.c:1949)
[   19.318815][  T293]  ? netif_close_many_and_unlock (net/core/dev.c:12476)
[   19.318819][  T293]  unregister_netdevice_many_notify (net/core/dev.c:12545)
[   19.318825][  T293]  ? 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:67)
[   19.318829][  T293]  ? dev_ingress_queue_create (net/core/dev.c:12499)
[   19.318832][  T293]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   19.318835][  T293]  ? unregister_netdevice_queue (net/core/dev.c:12442)
[   19.318838][  T293]  ? unregister_netdevice_many (net/core/dev.c:12441)
[   19.318842][  T293]  ? unregister_netdevice_many (net/core/dev.c:12441)
[   19.318847][  T293]  rtnl_dellink (net/core/rtnetlink.c:3530 net/core/rtnetlink.c:3570)
[   19.318852][  T293]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   19.318871][  T293]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   19.318877][  T293]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.318882][  T293]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   19.318886][  T293]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   19.318889][  T293]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   19.318893][  T293]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   19.318896][  T293]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   19.318901][  T293]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   19.318904][  T293]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.318910][  T293]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   19.318914][  T293]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   19.318918][  T293]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   19.318925][  T293]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   19.318927][  T293]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[   19.318931][  T293]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   19.318935][  T293]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   19.318939][  T293]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.318947][  T293]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   19.318954][  T293]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   19.318958][  T293]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   19.318963][  T293]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   19.318966][  T293]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   19.318969][  T293]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   19.318972][  T293]  ? __copy_msghdr (net/socket.c:2556)
[   19.318979][  T293]  ___sys_sendmsg (net/socket.c:2686)
[   19.318981][  T293]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   19.318984][  T293]  ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3125)
[   19.318988][  T293]  ? copy_msghdr_from_user (net/socket.c:2673)
[   19.318993][  T293]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   19.318997][  T293]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.319002][  T293]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   19.319006][  T293]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   19.319010][  T293]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   19.319016][  T293]  __sys_sendmsg (net/socket.c:2716)
[   19.319018][  T293]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   19.319021][  T293]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   19.319028][  T293]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   19.319034][  T293]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   19.319039][  T293]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   19.319043][  T293] RIP: 0033:0x7f986ddea1d7
[   19.319046][  T293] Code: 0e 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:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   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)
[   19.319049][  T293] RSP: 002b:00007ffcbfb63118 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   19.319053][  T293] RAX: ffffffffffffffda RBX: 00007ffcbfb63850 RCX: 00007f986ddea1d7
[   19.319055][  T293] RDX: 0000000000000000 RSI: 00007ffcbfb63180 RDI: 0000000000000005
[   19.319057][  T293] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   19.319059][  T293] R10: 00007f986dce6510 R11: 0000000000000246 R12: 0000000000000001
[   19.319060][  T293] R13: 00000000691cdc4a R14: 0000000000499600 R15: 0000000000000000
| [   19.334365][  T293] #PF: error_code(0x0002) - not-present page
| [   19.334576][  T293] PGD b28d067 P4D b28d067 PUD ae7b067 PMD 0
| [   19.334794][  T293] Oops: Oops: 0002 [#1] SMP KASAN
| [   19.335305][  T293] Tainted: [B]=BAD_PAGE
[   19.335434][  T293] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.335645][  T293] RIP: 0010:try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   19.335863][  T293] Code: 00 41 89 c0 b8 01 00 00 00 45 85 c0 74 0f 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 be 08 00 00 00 48 89 df e8 1f 93 82 00 <f0> 48 0f ba 2b 00 72 11 48 83 c4 10 31 c0 5b 5d 41 5c 41 5d 41 5e
All code
========
   0:	00 41 89             	add    %al,-0x77(%rcx)
   3:	c0 b8 01 00 00 00 45 	sarb   $0x45,0x1(%rax)
   a:	85 c0                	test   %eax,%eax
   c:	74 0f                	je     0x1d
   e:	48 83 c4 10          	add    $0x10,%rsp
  12:	5b                   	pop    %rbx
  13:	5d                   	pop    %rbp
  14:	41 5c                	pop    %r12
  16:	41 5d                	pop    %r13
  18:	41 5e                	pop    %r14
  1a:	41 5f                	pop    %r15
  1c:	c3                   	ret
  1d:	be 08 00 00 00       	mov    $0x8,%esi
  22:	48 89 df             	mov    %rbx,%rdi
  25:	e8 1f 93 82 00       	call   0x829349
  2a:*	f0 48 0f ba 2b 00    	lock btsq $0x0,(%rbx)		<-- trapping instruction
  30:	72 11                	jb     0x43
  32:	48 83 c4 10          	add    $0x10,%rsp
  36:	31 c0                	xor    %eax,%eax
  38:	5b                   	pop    %rbx
  39:	5d                   	pop    %rbp
  3a:	41 5c                	pop    %r12
  3c:	41 5d                	pop    %r13
  3e:	41 5e                	pop    %r14

Code starting with the faulting instruction
===========================================
   0:	f0 48 0f ba 2b 00    	lock btsq $0x0,(%rbx)
   6:	72 11                	jb     0x19
   8:	48 83 c4 10          	add    $0x10,%rsp
   c:	31 c0                	xor    %eax,%eax
   e:	5b                   	pop    %rbx
   f:	5d                   	pop    %rbp
  10:	41 5c                	pop    %r12
  12:	41 5d                	pop    %r13
  14:	41 5e                	pop    %r14
[   19.336458][  T293] RSP: 0018:ffffc90000c46f08 EFLAGS: 00010046
[   19.336672][  T293] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffb4c49b8a
[   19.336925][  T293] RDX: fffffbfff732cacd RSI: 0000000000000008 RDI: ffffffffb9965660
[   19.337185][  T293] RBP: ffffc90000c46f70 R08: 0000000000000001 R09: fffffbfff732cacc
[   19.337436][  T293] R10: ffffffffb9965667 R11: ffffc90000c469c0 R12: 0000000000000000
[   19.337685][  T293] R13: 0000000000000282 R14: ffff88800e679000 R15: dffffc0000000000
[   19.337942][  T293] FS:  00007f986dc1c800(0000) GS:ffff8880b3887000(0000) knlGS:0000000000000000
[   19.338237][  T293] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.338471][  T293] CR2: 0000000000000000 CR3: 000000000be12006 CR4: 0000000000772ef0
[   19.338724][  T293] PKRU: 55555554
[   19.338849][  T293] Call Trace:
[   19.338982][  T293]  <TASK>
[   19.339074][  T293]  ? page_pool_release (net/core/page_pool.c:1196)
[   19.339247][  T293]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   19.339416][  T293]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   19.339586][  T293]  __cancel_work_sync (kernel/workqueue.c:4383)
[   19.339753][  T293]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   19.339920][  T293]  ? netdev_notify_peers (net/core/dev.c:1891)
[   19.340092][  T293]  ? netif_close_many (net/core/dev.c:1959)
[   19.340260][  T293]  netif_close_many (net/core/dev.c:1959)
[   19.340435][  T293]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   19.340602][  T293]  ? __dev_close_many (net/core/dev.c:1949)
[   19.340771][  T293]  ? netif_close_many_and_unlock (net/core/dev.c:12476)
[   19.340985][  T293]  unregister_netdevice_many_notify (net/core/dev.c:12545)
[   19.341194][  T293]  ? 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:67)
[   19.341361][  T293]  ? dev_ingress_queue_create (net/core/dev.c:12499)
[   19.341526][  T293]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   19.341695][  T293]  ? unregister_netdevice_queue (net/core/dev.c:12442)
[   19.341901][  T293]  ? unregister_netdevice_many (net/core/dev.c:12441)
[   19.342077][  T293]  ? unregister_netdevice_many (net/core/dev.c:12441)
[   19.342246][  T293]  rtnl_dellink (net/core/rtnetlink.c:3530 net/core/rtnetlink.c:3570)
[   19.342417][  T293]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   19.342643][  T293]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   19.342813][  T293]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.342990][  T293]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   19.343158][  T293]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   19.343323][  T293]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   19.343490][  T293]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   19.343697][  T293]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   19.343865][  T293]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   19.344039][  T293]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.344214][  T293]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   19.344383][  T293]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   19.344551][  T293]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   19.344718][  T293]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   19.344883][  T293]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[   19.345058][  T293]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   19.345224][  T293]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   19.345397][  T293]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.345566][  T293]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   19.345735][  T293]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   19.345902][  T293]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   19.346078][  T293]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   19.346246][  T293]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   19.346413][  T293]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   19.346619][  T293]  ? __copy_msghdr (net/socket.c:2556)
[   19.346796][  T293]  ___sys_sendmsg (net/socket.c:2686)
[   19.346964][  T293]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   19.347135][  T293]  ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3125)
[   19.347342][  T293]  ? copy_msghdr_from_user (net/socket.c:2673)
[   19.347511][  T293]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   19.347679][  T293]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   19.347849][  T293]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   19.348022][  T293]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   19.348199][  T293]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   19.348389][  T293]  __sys_sendmsg (net/socket.c:2716)
[   19.348557][  T293]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   19.348768][  T293]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   19.348943][  T293]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   19.349116][  T293]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   19.349287][  T293]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   19.349503][  T293] RIP: 0033:0x7f986ddea1d7
[   19.349683][  T293] Code: 0e 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:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   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)
[   19.350283][  T293] RSP: 002b:00007ffcbfb63118 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   19.350539][  T293] RAX: ffffffffffffffda RBX: 00007ffcbfb63850 RCX: 00007f986ddea1d7
[   19.350795][  T293] RDX: 0000000000000000 RSI: 00007ffcbfb63180 RDI: 0000000000000005
[   19.351055][  T293] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   19.351305][  T293] R10: 00007f986dce6510 R11: 0000000000000246 R12: 0000000000000001


Finger prints:
kasan_report:kasan_check_range:try_to_grab_pending:__cancel_work:__cancel_work_sync
try_to_grab_pending:__cancel_work:__cancel_work_sync:__dev_close_many:netif_close_many