======================================
| [   42.191538][  T511] ==================================================================
| [   42.191890][  T511] 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)
| [   42.192187][  T511] Write of size 8 at addr 0000000000000000 by task ip/511
| [   42.192421][  T511]
[   42.192525][  T511] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   42.192527][  T511] Call Trace:
[   42.192529][  T511]  <TASK>
[   42.192531][  T511]  dump_stack_lvl (lib/dump_stack.c:123)
[   42.192540][  T511]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   42.192543][  T511]  kasan_report (mm/kasan/report.c:597)
[   42.192550][  T511]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   42.192555][  T511]  kasan_check_range (mm/kasan/generic.c:194 mm/kasan/generic.c:200)
[   42.192559][  T511]  try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   42.192564][  T511]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   42.192567][  T511]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   42.192571][  T511]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[   42.192574][  T511]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   42.192581][  T511]  __cancel_work_sync (kernel/workqueue.c:4383)
[   42.192585][  T511]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   42.192594][  T511]  ? netdev_notify_peers (net/core/dev.c:1891)
[   42.192598][  T511]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   42.192604][  T511]  __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)
[   42.192607][  T511]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[   42.192614][  T511]  ? netif_set_allmulti (net/core/dev.c:9890)
[   42.192617][  T511]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.192623][  T511]  netif_change_flags (net/core/dev.c:9989)
[   42.192627][  T511]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[   42.192634][  T511]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[   42.192639][  T511]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   42.192647][  T511]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   42.192652][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.192657][  T511]  ? __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)
[   42.192662][  T511]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   42.192665][  T511]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   42.192670][  T511]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   42.192673][  T511]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[   42.192677][  T511]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[   42.192683][  T511]  ? __create_object (mm/kmemleak.c:786)
[   42.192686][  T511]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.192690][  T511]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[   42.192693][  T511]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[   42.192696][  T511]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[   42.192701][  T511]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[   42.192706][  T511]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[   42.192711][  T511]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   42.192714][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.192720][  T511]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.192724][  T511]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   42.192726][  T511]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.192730][  T511]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   42.192733][  T511]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   42.192737][  T511]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   42.192739][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.192746][  T511]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   42.192751][  T511]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   42.192754][  T511]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   42.192761][  T511]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   42.192764][  T511]  ? 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)
[   42.192768][  T511]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   42.192772][  T511]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   42.192776][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.192782][  T511]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   42.192786][  T511]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   42.192790][  T511]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   42.192795][  T511]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   42.192799][  T511]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   42.192806][  T511]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   42.192809][  T511]  ? __copy_msghdr (net/socket.c:2556)
[   42.192816][  T511]  ___sys_sendmsg (net/socket.c:2686)
[   42.192819][  T511]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   42.192822][  T511]  ? __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)
[   42.192829][  T511]  ? copy_msghdr_from_user (net/socket.c:2673)
[   42.192834][  T511]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.192838][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.192844][  T511]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.192848][  T511]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   42.192854][  T511]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.192860][  T511]  __sys_sendmsg (net/socket.c:2716)
[   42.192863][  T511]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   42.192867][  T511]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   42.192875][  T511]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   42.192879][  T511]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   42.192886][  T511]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   42.192891][  T511] RIP: 0033:0x7f75dc0ac1d7
[   42.192895][  T511] 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)
[   42.192898][  T511] RSP: 002b:00007ffe7e7e51a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   42.192902][  T511] RAX: ffffffffffffffda RBX: 00007ffe7e7e58d0 RCX: 00007f75dc0ac1d7
[   42.192904][  T511] RDX: 0000000000000000 RSI: 00007ffe7e7e5210 RDI: 0000000000000005
[   42.192906][  T511] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[   42.192908][  T511] R10: 00007f75dbfa8f60 R11: 0000000000000246 R12: 0000000000000003
[   42.192910][  T511] R13: 00000000691ccac4 R14: 0000000000499600 R15: 0000000000000000
| [   42.211627][  T511] #PF: error_code(0x0002) - not-present page
| [   42.211848][  T511] PGD be0e067 P4D be0e067 PUD cae5067 PMD 0
| [   42.212079][  T511] Oops: Oops: 0002 [#1] SMP KASAN
| [   42.212637][  T511] Tainted: [B]=BAD_PAGE
[   42.212778][  T511] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   42.213011][  T511] 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)
[   42.213261][  T511] 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
[   42.213905][  T511] RSP: 0018:ffffc90000586f40 EFLAGS: 00010046
[   42.214138][  T511] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff9984090a
[   42.214413][  T511] RDX: fffffbfff3b4f2cd RSI: 0000000000000008 RDI: ffffffff9da79660
[   42.214683][  T511] RBP: ffffc90000586fa8 R08: 0000000000000001 R09: fffffbfff3b4f2cc
[   42.214953][  T511] R10: ffffffff9da79667 R11: ffffc90000586a00 R12: 0000000000000000
[   42.215227][  T511] R13: 0000000000000282 R14: ffff888002871000 R15: dffffc0000000000
[   42.215504][  T511] FS:  00007f75dbede800(0000) GS:ffff888092df2000(0000) knlGS:0000000000000000
[   42.215818][  T511] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.216092][  T511] CR2: 0000000000000000 CR3: 0000000008ab9001 CR4: 0000000000772ef0
[   42.216359][  T511] PKRU: 55555554
[   42.216496][  T511] Call Trace:
[   42.216655][  T511]  <TASK>
[   42.216747][  T511]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   42.216926][  T511]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   42.217103][  T511]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[   42.217272][  T511]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   42.217454][  T511]  __cancel_work_sync (kernel/workqueue.c:4383)
[   42.217642][  T511]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   42.217825][  T511]  ? netdev_notify_peers (net/core/dev.c:1891)
[   42.218002][  T511]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   42.218172][  T511]  __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)
[   42.218347][  T511]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[   42.218519][  T511]  ? netif_set_allmulti (net/core/dev.c:9890)
[   42.218694][  T511]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.218867][  T511]  netif_change_flags (net/core/dev.c:9989)
[   42.219048][  T511]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[   42.219219][  T511]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[   42.219397][  T511]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   42.219568][  T511]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   42.219741][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.219914][  T511]  ? __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)
[   42.220089][  T511]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   42.220267][  T511]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   42.220448][  T511]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   42.220616][  T511]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[   42.220786][  T511]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[   42.220958][  T511]  ? __create_object (mm/kmemleak.c:786)
[   42.221130][  T511]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.221304][  T511]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[   42.221481][  T511]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[   42.221654][  T511]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[   42.221825][  T511]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[   42.222000][  T511]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[   42.222171][  T511]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   42.222345][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.222518][  T511]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.222687][  T511]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   42.222858][  T511]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.223050][  T511]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   42.223220][  T511]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   42.223397][  T511]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   42.223563][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.223735][  T511]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   42.223907][  T511]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   42.224078][  T511]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   42.224251][  T511]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   42.224433][  T511]  ? 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)
[   42.224608][  T511]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   42.224779][  T511]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   42.224949][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.225123][  T511]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   42.225299][  T511]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   42.225471][  T511]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   42.225641][  T511]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   42.225818][  T511]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   42.225991][  T511]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   42.226204][  T511]  ? __copy_msghdr (net/socket.c:2556)
[   42.226389][  T511]  ___sys_sendmsg (net/socket.c:2686)
[   42.226560][  T511]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   42.226737][  T511]  ? __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)
[   42.226952][  T511]  ? copy_msghdr_from_user (net/socket.c:2673)
[   42.227125][  T511]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.227305][  T511]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   42.227483][  T511]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   42.227670][  T511]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   42.227845][  T511]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   42.228021][  T511]  __sys_sendmsg (net/socket.c:2716)
[   42.228192][  T511]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   42.228487][  T511]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   42.228777][  T511]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   42.229075][  T511]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   42.229369][  T511]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   42.229726][  T511] RIP: 0033:0x7f75dc0ac1d7
[   42.230033][  T511] 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)
[   42.231061][  T511] RSP: 002b:00007ffe7e7e51a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   42.231443][  T511] RAX: ffffffffffffffda RBX: 00007ffe7e7e58d0 RCX: 00007f75dc0ac1d7
[   42.231699][  T511] RDX: 0000000000000000 RSI: 00007ffe7e7e5210 RDI: 0000000000000005
[   42.231965][  T511] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[   42.232224][  T511] R10: 00007f75dbfa8f60 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