======================================
| [   71.351738][  T476] ==================================================================
| [   71.352059][  T476] 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)
| [   71.352380][  T476] Write of size 8 at addr 0000000000000000 by task ip/476
| [   71.352628][  T476]
[   71.352740][  T476] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   71.352746][  T476] Call Trace:
[   71.352749][  T476]  <TASK>
[   71.352751][  T476]  dump_stack_lvl (lib/dump_stack.c:123)
[   71.352767][  T476]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   71.352771][  T476]  kasan_report (mm/kasan/report.c:597)
[   71.352783][  T476]  ? try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   71.352788][  T476]  kasan_check_range (mm/kasan/generic.c:194 mm/kasan/generic.c:200)
[   71.352791][  T476]  try_to_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072)
[   71.352797][  T476]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   71.352800][  T476]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   71.352804][  T476]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[   71.352807][  T476]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   71.352814][  T476]  __cancel_work_sync (kernel/workqueue.c:4383)
[   71.352818][  T476]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   71.352829][  T476]  ? netdev_notify_peers (net/core/dev.c:1891)
[   71.352837][  T476]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   71.352849][  T476]  __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)
[   71.352852][  T476]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[   71.352861][  T476]  ? netif_set_allmulti (net/core/dev.c:9890)
[   71.352863][  T476]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   71.352870][  T476]  netif_change_flags (net/core/dev.c:9989)
[   71.352874][  T476]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[   71.352880][  T476]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[   71.352886][  T476]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   71.352895][  T476]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   71.352900][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.352906][  T476]  ? __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)
[   71.352909][  T476]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   71.352912][  T476]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   71.352918][  T476]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   71.352920][  T476]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[   71.352924][  T476]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[   71.352935][  T476]  ? __create_object (mm/kmemleak.c:786)
[   71.352940][  T476]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   71.352944][  T476]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[   71.352947][  T476]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[   71.352950][  T476]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[   71.352961][  T476]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[   71.352967][  T476]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[   71.352971][  T476]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   71.352974][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.352981][  T476]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   71.352985][  T476]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   71.352987][  T476]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   71.352992][  T476]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   71.352995][  T476]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   71.352998][  T476]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   71.353001][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.353008][  T476]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   71.353015][  T476]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   71.353019][  T476]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   71.353025][  T476]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   71.353028][  T476]  ? 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)
[   71.353032][  T476]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   71.353036][  T476]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   71.353040][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.353046][  T476]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   71.353050][  T476]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   71.353054][  T476]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   71.353066][  T476]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   71.353069][  T476]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   71.353077][  T476]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   71.353083][  T476]  ? __copy_msghdr (net/socket.c:2556)
[   71.353091][  T476]  ___sys_sendmsg (net/socket.c:2686)
[   71.353094][  T476]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   71.353097][  T476]  ? __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)
[   71.353103][  T476]  ? copy_msghdr_from_user (net/socket.c:2673)
[   71.353108][  T476]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   71.353113][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.353119][  T476]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   71.353122][  T476]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   71.353134][  T476]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   71.353141][  T476]  __sys_sendmsg (net/socket.c:2716)
[   71.353144][  T476]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   71.353148][  T476]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   71.353155][  T476]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   71.353159][  T476]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   71.353167][  T476]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   71.353171][  T476] RIP: 0033:0x7efc629aa1d7
[   71.353175][  T476] 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)
[   71.353178][  T476] RSP: 002b:00007ffdfb930628 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   71.353186][  T476] RAX: ffffffffffffffda RBX: 00007ffdfb930d50 RCX: 00007efc629aa1d7
[   71.353190][  T476] RDX: 0000000000000000 RSI: 00007ffdfb930690 RDI: 0000000000000005
[   71.353192][  T476] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[   71.353194][  T476] R10: 00007efc628a6f60 R11: 0000000000000246 R12: 0000000000000003
[   71.353197][  T476] R13: 00000000691cc52e R14: 0000000000499600 R15: 0000000000000000
| [   71.371527][  T476] #PF: error_code(0x0002) - not-present page
| [   71.371740][  T476] PGD 4b0d067 P4D 4b0d067 PUD 9cd7067 PMD 0
| [   71.371989][  T476] Oops: Oops: 0002 [#1] SMP KASAN
| [   71.372530][  T476] Tainted: [B]=BAD_PAGE
[   71.372669][  T476] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   71.372902][  T476] 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)
[   71.373136][  T476] 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
[   71.373756][  T476] RSP: 0018:ffffc90000d76f40 EFLAGS: 00010046
[   71.373998][  T476] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8524090a
[   71.374257][  T476] RDX: fffffbfff128f2cd RSI: 0000000000000008 RDI: ffffffff89479660
[   71.374525][  T476] RBP: ffffc90000d76fa8 R08: 0000000000000001 R09: fffffbfff128f2cc
[   71.374780][  T476] R10: ffffffff89479667 R11: ffffc90000d76a00 R12: 0000000000000000
[   71.375061][  T476] R13: 0000000000000282 R14: ffff88800acd1000 R15: dffffc0000000000
[   71.375321][  T476] FS:  00007efc627dc800(0000) GS:ffff8880a7272000(0000) knlGS:0000000000000000
[   71.375644][  T476] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   71.375867][  T476] CR2: 0000000000000000 CR3: 000000000a98c002 CR4: 0000000000772ef0
[   71.376144][  T476] PKRU: 55555554
[   71.376281][  T476] Call Trace:
[   71.376410][  T476]  <TASK>
[   71.376519][  T476]  __cancel_work (kernel/workqueue.c:2161 kernel/workqueue.c:4364)
[   71.376698][  T476]  ? enable_delayed_work (kernel/workqueue.c:4359)
[   71.376882][  T476]  ? queue_delayed_work_on (kernel/workqueue.c:2590)
[   71.377061][  T476]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   71.377241][  T476]  __cancel_work_sync (kernel/workqueue.c:4383)
[   71.377413][  T476]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[   71.377610][  T476]  ? netdev_notify_peers (net/core/dev.c:1891)
[   71.377781][  T476]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   71.377964][  T476]  __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)
[   71.378136][  T476]  ? __free_zapped_classes (kernel/locking/lockdep.c:5343)
[   71.378310][  T476]  ? netif_set_allmulti (net/core/dev.c:9890)
[   71.378487][  T476]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   71.378665][  T476]  netif_change_flags (net/core/dev.c:9989)
[   71.378837][  T476]  do_setlink.constprop.0 (net/core/rtnetlink.c:3158)
[   71.379038][  T476]  ? rtnl_newlink_create (net/core/rtnetlink.c:3036)
[   71.379212][  T476]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   71.379383][  T476]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   71.379569][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.379746][  T476]  ? __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)
[   71.379928][  T476]  ? __mutex_handoff (kernel/locking/mutex.c:88)
[   71.380112][  T476]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   71.380393][  T476]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   71.380577][  T476]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21))
[   71.380748][  T476]  ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:739 kernel/locking/mutex.c:760)
[   71.380928][  T476]  ? __create_object (mm/kmemleak.c:786)
[   71.381216][  T476]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   71.381383][  T476]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[   71.381581][  T476]  ? ww_mutex_lock (kernel/locking/mutex.c:759)
[   71.381755][  T476]  ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21))
[   71.382047][  T476]  ? __rtnl_newlink (net/core/rtnetlink.c:3922)
[   71.382219][  T476]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[   71.382386][  T476]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   71.382568][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.382852][  T476]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   71.383035][  T476]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   71.383206][  T476]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   71.383374][  T476]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   71.383671][  T476]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   71.383848][  T476]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   71.384032][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.384208][  T476]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   71.384503][  T476]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   71.384679][  T476]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   71.384856][  T476]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   71.385037][  T476]  ? 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)
[   71.385317][  T476]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   71.385495][  T476]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   71.385672][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.385849][  T476]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   71.386135][  T476]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   71.386305][  T476]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   71.386491][  T476]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   71.386664][  T476]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   71.386950][  T476]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   71.387169][  T476]  ? __copy_msghdr (net/socket.c:2556)
[   71.387355][  T476]  ___sys_sendmsg (net/socket.c:2686)
[   71.387536][  T476]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   71.387850][  T476]  ? __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)
[   71.388084][  T476]  ? copy_msghdr_from_user (net/socket.c:2673)
[   71.388275][  T476]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   71.388571][  T476]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   71.388746][  T476]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   71.388926][  T476]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   71.389124][  T476]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   71.389455][  T476]  __sys_sendmsg (net/socket.c:2716)
[   71.389649][  T476]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   71.389876][  T476]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   71.390061][  T476]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   71.390358][  T476]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   71.390544][  T476]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   71.390754][  T476] RIP: 0033:0x7efc629aa1d7
[   71.390941][  T476] 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)
[   71.391704][  T476] RSP: 002b:00007ffdfb930628 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   71.392087][  T476] RAX: ffffffffffffffda RBX: 00007ffdfb930d50 RCX: 00007efc629aa1d7
[   71.392350][  T476] RDX: 0000000000000000 RSI: 00007ffdfb930690 RDI: 0000000000000005
[   71.392635][  T476] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[   71.393010][  T476] R10: 00007efc628a6f60 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