======================================
| [  156.112767][  T934] ==================================================================
| [  156.113199][  T934] 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)
| [  156.113631][  T934] Write of size 8 at addr 0000000000000000 by task ip/934
| [  156.113973][  T934]
[  156.114127][  T934] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  156.114131][  T934] Call Trace:
[  156.114137][  T934]  <TASK>
[  156.114140][  T934]  dump_stack_lvl (lib/dump_stack.c:123)
[  156.114168][  T934]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[  156.114173][  T934]  kasan_report (mm/kasan/report.c:597)
[  156.114183][  T934]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[  156.114190][  T934]  kasan_check_range (mm/kasan/generic.c:194 mm/kasan/generic.c:200)
[  156.114195][  T934]  try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[  156.114201][  T934]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[  156.114206][  T934]  ? enable_delayed_work (kernel/workqueue.c:4359)
[  156.114210][  T934]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[  156.114215][  T934]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  156.114222][  T934]  __cancel_work_sync (kernel/workqueue.c:4383)
[  156.114227][  T934]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[  156.114242][  T934]  ? netdev_notify_peers (net/core/dev.c:1891)
[  156.114250][  T934]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[  156.114260][  T934]  __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)
[  156.114263][  T934]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[  156.114274][  T934]  ? netif_set_allmulti (net/core/dev.c:9890)
[  156.114280][  T934]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  156.114293][  T934]  netif_change_flags (net/core/dev.c:9989)
[  156.114301][  T934]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[  156.114313][  T934]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[  156.114323][  T934]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[  156.114334][  T934]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[  156.114341][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.114347][  T934]  ? __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)
[  156.114352][  T934]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[  156.114356][  T934]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  156.114362][  T934]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  156.114366][  T934]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[  156.114371][  T934]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[  156.114391][  T934]  ? __create_object (mm/kmemleak.c:786)
[  156.114398][  T934]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  156.114404][  T934]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[  156.114407][  T934]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[  156.114412][  T934]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[  156.114425][  T934]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[  156.114437][  T934]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[  156.114446][  T934]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[  156.114451][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.114462][  T934]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  156.114468][  T934]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  156.114473][  T934]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  156.114479][  T934]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[  156.114483][  T934]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  156.114488][  T934]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  156.114492][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.114501][  T934]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  156.114511][  T934]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  156.114515][  T934]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  156.114525][  T934]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  156.114529][  T934]  ? 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)
[  156.114534][  T934]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  156.114540][  T934]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  156.114545][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.114553][  T934]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  156.114559][  T934]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  156.114566][  T934]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  156.114582][  T934]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  156.114588][  T934]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  156.114602][  T934]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  156.114607][  T934]  ? __copy_msghdr (net/socket.c:2556)
[  156.114621][  T934]  ___sys_sendmsg (net/socket.c:2686)
[  156.114624][  T934]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  156.114628][  T934]  ? __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)
[  156.114639][  T934]  ? copy_msghdr_from_user (net/socket.c:2673)
[  156.114648][  T934]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  156.114656][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.114666][  T934]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  156.114672][  T934]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  156.114682][  T934]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  156.114690][  T934]  __sys_sendmsg (net/socket.c:2716)
[  156.114694][  T934]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  156.114699][  T934]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  156.114710][  T934]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  156.114715][  T934]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  156.114722][  T934]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  156.114727][  T934] RIP: 0033:0x7f62f62fc1d7
[  156.114732][  T934] 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)
[  156.114736][  T934] RSP: 002b:00007ffd44eaaa98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  156.114746][  T934] RAX: ffffffffffffffda RBX: 00007ffd44eab1c0 RCX: 00007f62f62fc1d7
[  156.114749][  T934] RDX: 0000000000000000 RSI: 00007ffd44eaab00 RDI: 0000000000000005
[  156.114752][  T934] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[  156.114755][  T934] R10: 00007f62f61f8f60 R11: 0000000000000246 R12: 0000000000000003
[  156.114758][  T934] R13: 00000000691cc07f R14: 0000000000499600 R15: 0000000000000000
| [  156.140480][  T934] #PF: error_code(0x0002) - not-present page
| [  156.140754][  T934] PGD bc6a067 P4D bc6a067 PUD 8c0a067 PMD 0
| [  156.141049][  T934] Oops: Oops: 0002 [#1] SMP KASAN
| [  156.141881][  T934] Tainted: [B]=BAD_PAGE
[  156.142060][  T934] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  156.142492][  T934] 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)
[  156.142785][  T934] 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
[  156.143728][  T934] RSP: 0018:ffffc900010eef40 EFLAGS: 00010046
[  156.144018][  T934] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffa4a4090a
[  156.144500][  T934] RDX: fffffbfff518f2cd RSI: 0000000000000008 RDI: ffffffffa8c79660
[  156.144847][  T934] RBP: ffffc900010eefa8 R08: 0000000000000001 R09: fffffbfff518f2cc
[  156.145197][  T934] R10: ffffffffa8c79667 R11: ffffc900010eea00 R12: 0000000000000000
[  156.145559][  T934] R13: 0000000000000282 R14: ffff888009b89000 R15: dffffc0000000000
[  156.145950][  T934] FS:  00007f62f612e800(0000) GS:ffff88808d672000(0000) knlGS:0000000000000000
[  156.146404][  T934] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  156.146727][  T934] CR2: 0000000000000000 CR3: 000000000b88f004 CR4: 0000000000772ef0
[  156.147120][  T934] PKRU: 55555554
[  156.147316][  T934] Call Trace:
[  156.147508][  T934]  <TASK>
[  156.147650][  T934]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[  156.147919][  T934]  ? enable_delayed_work (kernel/workqueue.c:4359)
[  156.148184][  T934]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[  156.148442][  T934]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  156.148899][  T934]  __cancel_work_sync (kernel/workqueue.c:4383)
[  156.149165][  T934]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[  156.149434][  T934]  ? netdev_notify_peers (net/core/dev.c:1891)
[  156.149699][  T934]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[  156.150122][  T934]  __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)
[  156.150375][  T934]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[  156.150631][  T934]  ? netif_set_allmulti (net/core/dev.c:9890)
[  156.150885][  T934]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  156.151332][  T934]  netif_change_flags (net/core/dev.c:9989)
[  156.151592][  T934]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[  156.151855][  T934]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[  156.152127][  T934]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[  156.152572][  T934]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[  156.152840][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.153115][  T934]  ? __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)
[  156.153364][  T934]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[  156.153615][  T934]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  156.153858][  T934]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  156.154096][  T934]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[  156.154338][  T934]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[  156.154605][  T934]  ? __create_object (mm/kmemleak.c:786)
[  156.154877][  T934]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  156.155142][  T934]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[  156.155401][  T934]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[  156.155660][  T934]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[  156.155924][  T934]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[  156.156180][  T934]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[  156.156449][  T934]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[  156.156840][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.157077][  T934]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  156.157320][  T934]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[  156.157553][  T934]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  156.157945][  T934]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[  156.158199][  T934]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[  156.158457][  T934]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  156.158704][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.159126][  T934]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[  156.159385][  T934]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[  156.159637][  T934]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[  156.159889][  T934]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[  156.160321][  T934]  ? 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)
[  156.160556][  T934]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[  156.160789][  T934]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[  156.161026][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.161414][  T934]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[  156.161653][  T934]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  156.161908][  T934]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[  156.162149][  T934]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[  156.162569][  T934]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[  156.162811][  T934]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[  156.163131][  T934]  ? __copy_msghdr (net/socket.c:2556)
[  156.163391][  T934]  ___sys_sendmsg (net/socket.c:2686)
[  156.163639][  T934]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[  156.163906][  T934]  ? __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)
[  156.164219][  T934]  ? copy_msghdr_from_user (net/socket.c:2673)
[  156.164458][  T934]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  156.164693][  T934]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  156.164981][  T934]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  156.165168][  T934]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[  156.165472][  T934]  ? __lock_release (kernel/locking/lockdep.c:5536)
[  156.165660][  T934]  __sys_sendmsg (net/socket.c:2716)
[  156.165855][  T934]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[  156.166076][  T934]  ? __sys_sendmsg_sock (net/socket.c:2701)
[  156.166369][  T934]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[  156.166553][  T934]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  156.166739][  T934]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[  156.166976][  T934] RIP: 0033:0x7f62f62fc1d7
[  156.167296][  T934] 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)
[  156.168055][  T934] RSP: 002b:00007ffd44eaaa98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  156.168342][  T934] RAX: ffffffffffffffda RBX: 00007ffd44eab1c0 RCX: 00007f62f62fc1d7
[  156.168621][  T934] RDX: 0000000000000000 RSI: 00007ffd44eaab00 RDI: 0000000000000005
[  156.169018][  T934] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[  156.169294][  T934] R10: 00007f62f61f8f60 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