======================================
| [   63.244549][  T736] ==================================================================
| [   63.244875][  T736] 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)
| [   63.245191][  T736] Write of size 8 at addr 0000000000000000 by task ip/736
| [   63.245428][  T736]
[   63.245544][  T736] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   63.245551][  T736] Call Trace:
[   63.245557][  T736]  <TASK>
[   63.245559][  T736]  dump_stack_lvl (lib/dump_stack.c:123)
[   63.245586][  T736]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   63.245590][  T736]  kasan_report (mm/kasan/report.c:597)
[   63.245600][  T736]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   63.245606][  T736]  kasan_check_range (mm/kasan/generic.c:194 mm/kasan/generic.c:200)
[   63.245609][  T736]  try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   63.245615][  T736]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   63.245618][  T736]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   63.245621][  T736]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[   63.245625][  T736]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   63.245632][  T736]  __cancel_work_sync (kernel/workqueue.c:4383)
[   63.245636][  T736]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   63.245650][  T736]  ? netdev_notify_peers (net/core/dev.c:1891)
[   63.245655][  T736]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   63.245661][  T736]  __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)
[   63.245664][  T736]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[   63.245672][  T736]  ? netif_set_allmulti (net/core/dev.c:9890)
[   63.245674][  T736]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   63.245683][  T736]  netif_change_flags (net/core/dev.c:9989)
[   63.245687][  T736]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[   63.245696][  T736]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[   63.245701][  T736]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   63.245712][  T736]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   63.245719][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.245726][  T736]  ? __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)
[   63.245730][  T736]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   63.245734][  T736]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   63.245742][  T736]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   63.245745][  T736]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[   63.245749][  T736]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[   63.245764][  T736]  ? __create_object (mm/kmemleak.c:786)
[   63.245769][  T736]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   63.245772][  T736]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[   63.245775][  T736]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[   63.245779][  T736]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[   63.245791][  T736]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[   63.245796][  T736]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[   63.245801][  T736]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   63.245804][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.245810][  T736]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   63.245814][  T736]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   63.245816][  T736]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   63.245821][  T736]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   63.245824][  T736]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   63.245827][  T736]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   63.245830][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.245837][  T736]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   63.245846][  T736]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   63.245850][  T736]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   63.245857][  T736]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   63.245860][  T736]  ? 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)
[   63.245864][  T736]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   63.245868][  T736]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   63.245872][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.245877][  T736]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   63.245882][  T736]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   63.245885][  T736]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   63.245897][  T736]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   63.245900][  T736]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   63.245910][  T736]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   63.245913][  T736]  ? __copy_msghdr (net/socket.c:2556)
[   63.245920][  T736]  ___sys_sendmsg (net/socket.c:2686)
[   63.245924][  T736]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   63.245926][  T736]  ? __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)
[   63.245934][  T736]  ? copy_msghdr_from_user (net/socket.c:2673)
[   63.245939][  T736]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   63.245945][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.245951][  T736]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   63.245955][  T736]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   63.245967][  T736]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   63.245973][  T736]  __sys_sendmsg (net/socket.c:2716)
[   63.245976][  T736]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   63.245980][  T736]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   63.245988][  T736]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   63.245992][  T736]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   63.245997][  T736]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   63.246005][  T736] RIP: 0033:0x7fca8031c1d7
[   63.246010][  T736] 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)
[   63.246013][  T736] RSP: 002b:00007ffe1ca2a858 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   63.246020][  T736] RAX: ffffffffffffffda RBX: 00007ffe1ca2af80 RCX: 00007fca8031c1d7
[   63.246022][  T736] RDX: 0000000000000000 RSI: 00007ffe1ca2a8c0 RDI: 0000000000000005
[   63.246024][  T736] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[   63.246026][  T736] R10: 00007fca80218f60 R11: 0000000000000246 R12: 0000000000000003
[   63.246027][  T736] R13: 00000000691cda6d R14: 0000000000499600 R15: 0000000000000000
| [   63.266041][  T736] #PF: error_code(0x0002) - not-present page
| [   63.266283][  T736] PGD 4ea7067 P4D 4ea7067 PUD b572067 PMD 0
| [   63.266645][  T736] Oops: Oops: 0002 [#1] SMP KASAN
| [   63.267242][  T736] Tainted: [B]=BAD_PAGE
[   63.267506][  T736] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   63.267763][  T736] 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)
[   63.268011][  T736] 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
[   63.268818][  T736] RSP: 0018:ffffc900013f6f40 EFLAGS: 00010046
[   63.269061][  T736] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffab04090a
[   63.269471][  T736] RDX: fffffbfff5e4f2cd RSI: 0000000000000008 RDI: ffffffffaf279660
[   63.269768][  T736] RBP: ffffc900013f6fa8 R08: 0000000000000001 R09: fffffbfff5e4f2cc
[   63.270167][  T736] R10: ffffffffaf279667 R11: ffffc900013f6a00 R12: 0000000000000000
[   63.270473][  T736] R13: 0000000000000282 R14: ffff888009581000 R15: dffffc0000000000
[   63.270768][  T736] FS:  00007fca8014e800(0000) GS:ffff888086ff2000(0000) knlGS:0000000000000000
[   63.271216][  T736] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   63.271480][  T736] CR2: 0000000000000000 CR3: 0000000008bd6005 CR4: 0000000000772ef0
[   63.271785][  T736] PKRU: 55555554
[   63.272038][  T736] Call Trace:
[   63.272189][  T736]  <TASK>
[   63.272292][  T736]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   63.272493][  T736]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   63.272691][  T736]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[   63.272990][  T736]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   63.273194][  T736]  __cancel_work_sync (kernel/workqueue.c:4383)
[   63.273385][  T736]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   63.273600][  T736]  ? netdev_notify_peers (net/core/dev.c:1891)
[   63.273908][  T736]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   63.274112][  T736]  __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)
[   63.274309][  T736]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[   63.274510][  T736]  ? netif_set_allmulti (net/core/dev.c:9890)
[   63.274865][  T736]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   63.275055][  T736]  netif_change_flags (net/core/dev.c:9989)
[   63.275270][  T736]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[   63.275473][  T736]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[   63.275780][  T736]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   63.275970][  T736]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   63.276165][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.276357][  T736]  ? __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)
[   63.276669][  T736]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   63.276867][  T736]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   63.277055][  T736]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   63.277253][  T736]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[   63.277561][  T736]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[   63.277763][  T736]  ? __create_object (mm/kmemleak.c:786)
[   63.277946][  T736]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   63.278133][  T736]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[   63.278436][  T736]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[   63.278648][  T736]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[   63.278848][  T736]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[   63.279039][  T736]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[   63.279343][  T736]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   63.279536][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.279737][  T736]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   63.279928][  T736]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   63.280239][  T736]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   63.280436][  T736]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   63.280630][  T736]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   63.280827][  T736]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   63.281117][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.281314][  T736]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   63.281508][  T736]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   63.281706][  T736]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   63.282006][  T736]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   63.282208][  T736]  ? 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)
[   63.282420][  T736]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   63.282625][  T736]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   63.282924][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.283115][  T736]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   63.283308][  T736]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   63.283513][  T736]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   63.283832][  T736]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   63.284018][  T736]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   63.284212][  T736]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   63.284451][  T736]  ? __copy_msghdr (net/socket.c:2556)
[   63.284767][  T736]  ___sys_sendmsg (net/socket.c:2686)
[   63.284967][  T736]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   63.285205][  T736]  ? __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)
[   63.285542][  T736]  ? copy_msghdr_from_user (net/socket.c:2673)
[   63.285733][  T736]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   63.285911][  T736]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   63.286086][  T736]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   63.286392][  T736]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   63.286576][  T736]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   63.286759][  T736]  __sys_sendmsg (net/socket.c:2716)
[   63.286933][  T736]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   63.287294][  T736]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   63.287481][  T736]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   63.287659][  T736]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   63.287841][  T736]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   63.288169][  T736] RIP: 0033:0x7fca8031c1d7
[   63.288350][  T736] 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)
[   63.289112][  T736] RSP: 002b:00007ffe1ca2a858 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   63.289400][  T736] RAX: ffffffffffffffda RBX: 00007ffe1ca2af80 RCX: 00007fca8031c1d7
[   63.289789][  T736] RDX: 0000000000000000 RSI: 00007ffe1ca2a8c0 RDI: 0000000000000005
[   63.290055][  T736] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[   63.290341][  T736] R10: 00007fca80218f60 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