======================================
| [ 4380.203424][ T2050] ip (2050) used greatest stack depth: 23488 bytes left
| [ 4382.153898][ T2039] netdevsim netdevsim6771 eni6771np1: renamed from eth0
| [ 4383.372386][ T2036] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN NOPTI
| [ 4383.372914][ T2036] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
[ 4383.373397][ T2036] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4383.373609][ T2036] RIP: 0010:hrtimer_active (./include/linux/seqlock.h:226 kernel/time/hrtimer.c:1727) 
[ 4383.373779][ T2036] Code: 00 00 49 8b 44 24 30 48 39 c3 0f 84 93 00 00 00 41 80 3f 00 0f 85 68 01 00 00 49 8b 5c 24 30 48 8d 6b 10 48 89 e8 48 c1 e8 03 <42> 0f b6 3c 28 48 89 e8 83 e0 07 83 c0 03 40 38 f8 7c 09 40 84 ff
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	49 8b 44 24 30       	mov    0x30(%r12),%rax
   7:	48 39 c3             	cmp    %rax,%rbx
   a:	0f 84 93 00 00 00    	je     0xa3
  10:	41 80 3f 00          	cmpb   $0x0,(%r15)
  14:	0f 85 68 01 00 00    	jne    0x182
  1a:	49 8b 5c 24 30       	mov    0x30(%r12),%rbx
  1f:	48 8d 6b 10          	lea    0x10(%rbx),%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
  2a:*	42 0f b6 3c 28       	movzbl (%rax,%r13,1),%edi		<-- trapping instruction
  2f:	48 89 e8             	mov    %rbp,%rax
  32:	83 e0 07             	and    $0x7,%eax
  35:	83 c0 03             	add    $0x3,%eax
  38:	40 38 f8             	cmp    %dil,%al
  3b:	7c 09                	jl     0x46
  3d:	40 84 ff             	test   %dil,%dil

Code starting with the faulting instruction
===========================================
   0:	42 0f b6 3c 28       	movzbl (%rax,%r13,1),%edi
   5:	48 89 e8             	mov    %rbp,%rax
   8:	83 e0 07             	and    $0x7,%eax
   b:	83 c0 03             	add    $0x3,%eax
   e:	40 38 f8             	cmp    %dil,%al
  11:	7c 09                	jl     0x1c
  13:	40 84 ff             	test   %dil,%dil
[ 4383.374339][ T2036] RSP: 0018:ffffc90002c77598 EFLAGS: 00010202
[ 4383.374539][ T2036] RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffff888005ab3640
[ 4383.374775][ T2036] RDX: ffffed1000b566c9 RSI: ffff888005ab3648 RDI: ffff888005ab3610
[ 4383.375007][ T2036] RBP: 0000000000000010 R08: 0000000000000001 R09: fffffbfff5566fe1
[ 4383.375241][ T2036] R10: ffffffffaab37f0f R11: ffff88806d0bdbc0 R12: ffff888005ab3610
[ 4383.375469][ T2036] R13: dffffc0000000000 R14: ffff888005ab3400 R15: ffffed1000b566c8
[ 4383.375722][ T2036] FS:  00007feaabb921c0(0000) GS:ffff88806d080000(0000) knlGS:0000000000000000
[ 4383.375998][ T2036] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4383.376198][ T2036] CR2: 00007fea9dae5000 CR3: 0000000013336001 CR4: 0000000000772ef0
[ 4383.376435][ T2036] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4383.376670][ T2036] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4383.376907][ T2036] PKRU: 55555554
[ 4383.377029][ T2036] Call Trace:
[ 4383.377159][ T2036]  <TASK>
[ 4383.377241][ T2036] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) 
[ 4383.377369][ T2036] ? exc_general_protection (arch/x86/kernel/traps.c:751 arch/x86/kernel/traps.c:693) 
[ 4383.377530][ T2036] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:617) 
[ 4383.377692][ T2036] ? hrtimer_active (./include/linux/seqlock.h:226 kernel/time/hrtimer.c:1727) 
[ 4383.377850][ T2036] hrtimer_cancel (kernel/time/hrtimer.c:1373 kernel/time/hrtimer.c:1502) 
[ 4383.378006][ T2036] nsim_stop (drivers/net/netdevsim/netdev.c:483 drivers/net/netdevsim/netdev.c:504) netdevsim 
[ 4383.378173][ T2036] __dev_close_many (net/core/dev.c:1720) 
[ 4383.378329][ T2036] ? __pfx___dev_close_many (net/core/dev.c:1684) 
[ 4383.378482][ T2036] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 4383.378601][ T2036] ? mark_held_locks (kernel/locking/lockdep.c:4323) 
[ 4383.378757][ T2036] dev_close_many (net/core/dev.c:1747) 
[ 4383.378913][ T2036] ? __pfx_dev_close_many (net/core/dev.c:1737) 
[ 4383.379070][ T2036] unregister_netdevice_many_notify (net/core/dev.c:11828) 
[ 4383.379268][ T2036] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79) 
[ 4383.379460][ T2036] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11795) 
[ 4383.379651][ T2036] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 4383.379832][ T2036] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:730) 
[ 4383.379999][ T2036] ? nsim_destroy (drivers/net/netdevsim/netdev.c:1034) netdevsim 
[ 4383.380168][ T2036] ? __pfx___mutex_lock (kernel/locking/mutex.c:729) 
[ 4383.380325][ T2036] unregister_netdevice_queue (net/core/dev.c:11777) 
[ 4383.380485][ T2036] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 4383.380644][ T2036] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11766) 
[ 4383.380842][ T2036] nsim_destroy (drivers/net/netdevsim/netdev.c:1039 (discriminator 2)) netdevsim 
[ 4383.381008][ T2036] ? __pfx_mntput_no_expire (fs/namespace.c:1435) 
[ 4383.381168][ T2036] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1429) netdevsim 
[ 4383.381373][ T2036] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1438 drivers/net/netdevsim/dev.c:1661) netdevsim 
[ 4383.381580][ T2036] nsim_drv_remove (drivers/net/netdevsim/dev.c:1678) netdevsim 
[ 4383.381746][ T2036] device_release_driver_internal (drivers/base/dd.c:1275 drivers/base/dd.c:1296) 
[ 4383.381947][ T2036] ? klist_put (lib/klist.c:220) 
[ 4383.382071][ T2036] bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:586) 
[ 4383.382236][ T2036] device_del (drivers/base/core.c:3855) 
[ 4383.382358][ T2036] ? __pfx_device_del (drivers/base/core.c:3809) 
[ 4383.382526][ T2036] ? lock_acquire.part.0 (kernel/locking/lockdep.c:469 kernel/locking/lockdep.c:5853) 
[ 4383.382682][ T2036] ? kernfs_fop_write_iter (fs/kernfs/file.c:326) 
[ 4383.382844][ T2036] device_unregister (drivers/base/core.c:3772 drivers/base/core.c:3896) 
[ 4383.382996][ T2036] del_device_store (drivers/net/netdevsim/bus.c:230) netdevsim 
[ 4383.383213][ T2036] ? __pfx_del_device_store (drivers/net/netdevsim/bus.c:197) netdevsim 
[ 4383.383422][ T2036] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4383.383588][ T2036] ? sysfs_file_ops (fs/sysfs/file.c:31 (discriminator 1)) 
[ 4383.383747][ T2036] ? __pfx_sysfs_kf_write (fs/sysfs/file.c:132) 
[ 4383.383906][ T2036] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 4383.384069][ T2036] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 4383.384193][ T2036] ? __pfx_vfs_write (fs/read_write.c:660) 
[ 4383.384356][ T2036] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 4383.384522][ T2036] ? __pfx___mutex_unlock_slowpath (kernel/locking/mutex.c:885) 
[ 4383.384721][ T2036] ksys_write (fs/read_write.c:731) 
[ 4383.384849][ T2036] ? __pfx_ksys_write (fs/read_write.c:721) 
[ 4383.385002][ T2036] ? kernfs_fop_llseek (fs/kernfs/file.c:891) 
[ 4383.385156][ T2036] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4383.385308][ T2036] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4383.385502][ T2036] RIP: 0033:0x7feaabdacb77
[ 4383.385672][ T2036] Code: 0b 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
All code
========
   0:	0b 00                	or     (%rax),%eax
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b7                	jmp    0xffffffffffffffc7
  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 01 00 00 00       	mov    $0x1,%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:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	74 24                	je     0x64

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:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  12:	48                   	rex.W
  13:	89                   	.byte 0x89
  14:	74 24                	je     0x3a
[ 4383.386207][ T2036] RSP: 002b:00007ffd9f59b8a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4383.386437][ T2036] RAX: ffffffffffffffda RBX: 00007feaabb92140 RCX: 00007feaabdacb77
[ 4383.386670][ T2036] RDX: 0000000000000004 RSI: 00005644b8f88e60 RDI: 0000000000000006
[ 4383.386898][ T2036] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
[ 4383.387125][ T2036] R10: 0000000000000002 R11: 0000000000000246 R12: 00007fea9dae9100


Finger prints:
hrtimer_active:hrtimer_cancel:nsim_stop:__dev_close_many:dev_close_many