======================================
| [   52.298808][  T407] ==================================================================
| [   52.299196][  T407] 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)
| [   52.299552][  T407] Write of size 8 at addr 0000000000000000 by task ip/407
| [   52.299813][  T407]
[   52.299926][  T407] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   52.299929][  T407] Call Trace:
[   52.299932][  T407]  <TASK>
[   52.299934][  T407]  dump_stack_lvl (lib/dump_stack.c:123)
[   52.299945][  T407]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   52.299949][  T407]  kasan_report (mm/kasan/report.c:597)
[   52.299957][  T407]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   52.299962][  T407]  kasan_check_range (mm/kasan/generic.c:194 mm/kasan/generic.c:200)
[   52.299966][  T407]  try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   52.299971][  T407]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   52.299975][  T407]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   52.299979][  T407]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[   52.299982][  T407]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   52.299989][  T407]  __cancel_work_sync (kernel/workqueue.c:4383)
[   52.299993][  T407]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   52.300006][  T407]  ? netdev_notify_peers (net/core/dev.c:1891)
[   52.300013][  T407]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   52.300021][  T407]  __dev_change_flags (./include/linux/list.h:119 ./include/linux/list.h:223 ./include/linux/list.h:237 net/core/dev.c:1945 net/core/dev.c:9924)
[   52.300025][  T407]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[   52.300031][  T407]  ? netif_set_allmulti (net/core/dev.c:9890)
[   52.300033][  T407]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.300040][  T407]  netif_change_flags (net/core/dev.c:9989)
[   52.300044][  T407]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[   52.300051][  T407]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[   52.300056][  T407]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   52.300064][  T407]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   52.300072][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.300080][  T407]  ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113)
[   52.300086][  T407]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   52.300090][  T407]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   52.300095][  T407]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   52.300098][  T407]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[   52.300102][  T407]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[   52.300112][  T407]  ? __create_object (mm/kmemleak.c:786)
[   52.300118][  T407]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.300122][  T407]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[   52.300125][  T407]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[   52.300129][  T407]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[   52.300137][  T407]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[   52.300142][  T407]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[   52.300147][  T407]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   52.300150][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.300156][  T407]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.300160][  T407]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   52.300162][  T407]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.300168][  T407]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   52.300174][  T407]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   52.300179][  T407]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   52.300182][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.300192][  T407]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   52.300198][  T407]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   52.300205][  T407]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   52.300215][  T407]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   52.300219][  T407]  ? 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)
[   52.300223][  T407]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   52.300227][  T407]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   52.300232][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.300238][  T407]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   52.300242][  T407]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   52.300246][  T407]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   52.300256][  T407]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   52.300260][  T407]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   52.300266][  T407]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   52.300270][  T407]  ? __copy_msghdr (net/socket.c:2556)
[   52.300277][  T407]  ___sys_sendmsg (net/socket.c:2686)
[   52.300280][  T407]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   52.300283][  T407]  ? __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)
[   52.300290][  T407]  ? copy_msghdr_from_user (net/socket.c:2673)
[   52.300296][  T407]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.300303][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.300312][  T407]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.300316][  T407]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   52.300324][  T407]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.300331][  T407]  __sys_sendmsg (net/socket.c:2716)
[   52.300334][  T407]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   52.300338][  T407]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   52.300346][  T407]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   52.300350][  T407]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   52.300358][  T407]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   52.300362][  T407] RIP: 0033:0x7f0737ca51d7
[   52.300367][  T407] 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)
[   52.300371][  T407] RSP: 002b:00007ffe1d71ce48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   52.300377][  T407] RAX: ffffffffffffffda RBX: 00007ffe1d71d570 RCX: 00007f0737ca51d7
[   52.300379][  T407] RDX: 0000000000000000 RSI: 00007ffe1d71ceb0 RDI: 0000000000000005
[   52.300382][  T407] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[   52.300384][  T407] R10: 00007f0737ba1f60 R11: 0000000000000246 R12: 0000000000000003
[   52.300388][  T407] R13: 00000000691cc845 R14: 0000000000499600 R15: 0000000000000000
| [   52.320889][  T407] #PF: error_code(0x0002) - not-present page
| [   52.321240][  T407] PGD b9af067 P4D b9af067 PUD 9ff8067 PMD 0
| [   52.321485][  T407] Oops: Oops: 0002 [#1] SMP KASAN
| [   52.322200][  T407] Tainted: [B]=BAD_PAGE
[   52.322350][  T407] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   52.322583][  T407] 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)
[   52.322824][  T407] 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 7f 7f 81 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 7f 7f 81 00       	call   0x817fa9
  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
[   52.323604][  T407] RSP: 0018:ffffc900007b6f40 EFLAGS: 00010046
[   52.323945][  T407] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8cc4090a
[   52.324244][  T407] RDX: fffffbfff21cf2cd RSI: 0000000000000008 RDI: ffffffff90e79660
[   52.324523][  T407] RBP: ffffc900007b6fa8 R08: 0000000000000001 R09: fffffbfff21cf2cc
[   52.324915][  T407] R10: ffffffff90e79667 R11: ffffc900007b6a00 R12: 0000000000000000
[   52.325201][  T407] R13: 0000000000000282 R14: ffff8880080ec000 R15: dffffc0000000000
[   52.325490][  T407] FS:  00007f0737ad7800(0000) GS:ffff8880a53f2000(0000) knlGS:0000000000000000
[   52.325922][  T407] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   52.326164][  T407] CR2: 0000000000000000 CR3: 000000000553f005 CR4: 0000000000772ef0
[   52.326549][  T407] PKRU: 55555554
[   52.326695][  T407] Call Trace:
[   52.326833][  T407]  <TASK>
[   52.326929][  T407]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   52.327129][  T407]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   52.327428][  T407]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[   52.327607][  T407]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   52.327800][  T407]  __cancel_work_sync (kernel/workqueue.c:4383)
[   52.327971][  T407]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   52.328294][  T407]  ? netdev_notify_peers (net/core/dev.c:1891)
[   52.328476][  T407]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   52.328653][  T407]  __dev_change_flags (./include/linux/list.h:119 ./include/linux/list.h:223 ./include/linux/list.h:237 net/core/dev.c:1945 net/core/dev.c:9924)
[   52.328836][  T407]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[   52.329035][  T407]  ? netif_set_allmulti (net/core/dev.c:9890)
[   52.329222][  T407]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.329403][  T407]  netif_change_flags (net/core/dev.c:9989)
[   52.329575][  T407]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[   52.329872][  T407]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[   52.330056][  T407]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   52.330250][  T407]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   52.330460][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.330746][  T407]  ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:113)
[   52.330916][  T407]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   52.331101][  T407]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   52.331284][  T407]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   52.331567][  T407]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[   52.331746][  T407]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[   52.331919][  T407]  ? __create_object (mm/kmemleak.c:786)
[   52.332135][  T407]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.332431][  T407]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[   52.332601][  T407]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[   52.332792][  T407]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[   52.332963][  T407]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[   52.333267][  T407]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[   52.333447][  T407]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   52.333617][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.333813][  T407]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.334112][  T407]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   52.334292][  T407]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.334471][  T407]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   52.334640][  T407]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   52.334934][  T407]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   52.335119][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.335304][  T407]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   52.335488][  T407]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   52.335777][  T407]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   52.335959][  T407]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   52.336147][  T407]  ? 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)
[   52.336329][  T407]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   52.336617][  T407]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   52.336804][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.336985][  T407]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   52.337178][  T407]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   52.337467][  T407]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   52.337638][  T407]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   52.337816][  T407]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   52.337995][  T407]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   52.338348][  T407]  ? __copy_msghdr (net/socket.c:2556)
[   52.338534][  T407]  ___sys_sendmsg (net/socket.c:2686)
[   52.338723][  T407]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   52.338901][  T407]  ? __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)
[   52.339135][  T407]  ? copy_msghdr_from_user (net/socket.c:2673)
[   52.339313][  T407]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.339495][  T407]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   52.339678][  T407]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   52.339963][  T407]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   52.340159][  T407]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   52.340344][  T407]  __sys_sendmsg (net/socket.c:2716)
[   52.340531][  T407]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   52.340865][  T407]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   52.341051][  T407]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   52.341238][  T407]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   52.341526][  T407]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   52.341761][  T407] RIP: 0033:0x7f0737ca51d7
[   52.341967][  T407] 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)
[   52.342737][  T407] RSP: 002b:00007ffe1d71ce48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   52.343016][  T407] RAX: ffffffffffffffda RBX: 00007ffe1d71d570 RCX: 00007f0737ca51d7
[   52.343427][  T407] RDX: 0000000000000000 RSI: 00007ffe1d71ceb0 RDI: 0000000000000005
[   52.343713][  T407] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[   52.343985][  T407] R10: 00007f0737ba1f60 R11: 0000000000000246 R12: 0000000000000003


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