======================================
| [   28.256754][  T358] ==================================================================
| [   28.257100][  T358] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:733)
| [   28.257382][  T358] Read of size 1 at addr ffff88800f18a69c by task ip/358
| [   28.257618][  T358]
[   28.257724][  T358] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   28.257727][  T358] Call Trace:
[   28.257729][  T358]  <TASK>
[   28.257731][  T358]  dump_stack_lvl (lib/dump_stack.c:123)
[   28.257739][  T358]  print_address_description.constprop.0 (mm/kasan/report.c:379)
[   28.257747][  T358]  ? kobject_put (lib/kobject.c:733)
[   28.257750][  T358]  print_report (mm/kasan/report.c:483)
[   28.257753][  T358]  ? kobject_put (lib/kobject.c:733)
[   28.257755][  T358]  ? kasan_addr_to_slab (./include/linux/mm.h:1245 mm/kasan/../slab.h:191 mm/kasan/common.c:47)
[   28.257759][  T358]  ? kobject_put (lib/kobject.c:733)
[   28.257761][  T358]  kasan_report (mm/kasan/report.c:597)
[   28.257765][  T358]  ? kobject_put (lib/kobject.c:733)
[   28.257769][  T358]  kobject_put (lib/kobject.c:733)
[   28.257772][  T358]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   28.257780][  T358]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   28.257784][  T358]  ? generic_xdp_install (net/core/dev.c:11630)
[   28.257788][  T358]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   28.257793][  T358]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   28.257801][  T358]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   28.257820][  T358]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   28.257828][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.257834][  T358]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   28.257837][  T358]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   28.257840][  T358]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   28.257844][  T358]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   28.257848][  T358]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   28.257852][  T358]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   28.257855][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.257862][  T358]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   28.257867][  T358]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   28.257871][  T358]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   28.257877][  T358]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   28.257884][  T358]  ? 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)
[   28.257888][  T358]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   28.257892][  T358]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   28.257895][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.257901][  T358]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   28.257905][  T358]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   28.257908][  T358]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   28.257922][  T358]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   28.257925][  T358]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   28.257932][  T358]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   28.257936][  T358]  ? __copy_msghdr (net/socket.c:2556)
[   28.257941][  T358]  ? do_wp_page (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/linux/pgtable.h:136 mm/memory.c:4135)
[   28.257950][  T358]  ___sys_sendmsg (net/socket.c:2686)
[   28.257953][  T358]  ? copy_msghdr_from_user (net/socket.c:2673)
[   28.257956][  T358]  ? do_pte_missing (mm/memory.c:6134)
[   28.257959][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.257965][  T358]  ? __handle_mm_fault (mm/memory.c:6318)
[   28.257968][  T358]  ? __pmd_alloc (mm/memory.c:6229)
[   28.257975][  T358]  ? lock_vma_under_rcu (mm/mmap_lock.c:226)
[   28.257977][  T358]  ? lock_vma_under_rcu (mm/mmap_lock.c:259)
[   28.257981][  T358]  __sys_sendmsg (net/socket.c:2716)
[   28.257984][  T358]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   28.257987][  T358]  ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532)
[   28.257996][  T358]  ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mmap_lock.h:143 ./include/linux/mmap_lock.h:182 arch/x86/mm/fault.c:1338)
[   28.258003][  T358]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   28.258010][  T358]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   28.258014][  T358]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   28.258018][  T358] RIP: 0033:0x7f1e0c55a1d7
[   28.258024][  T358] 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)
[   28.258027][  T358] RSP: 002b:00007ffe5ae91998 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   28.258032][  T358] RAX: ffffffffffffffda RBX: 00007ffe5ae920d0 RCX: 00007f1e0c55a1d7
[   28.258034][  T358] RDX: 0000000000000000 RSI: 00007ffe5ae91a00 RDI: 0000000000000005
[   28.258036][  T358] RBP: 0000000000000000 R08: 000000000000002c R09: 0000000000000008
[   28.258038][  T358] R10: 0000000000403668 R11: 0000000000000246 R12: 00007ffe5ae920e8
[   28.258040][  T358] R13: 00000000690df963 R14: 0000000000499600 R15: 0000000000000000
| [   28.284127][  T358] refcount_t: underflow; use-after-free.
| [   28.284349][  T358] WARNING: CPU: 2 PID: 358 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
| [   28.284673][  T358] Modules linked in: netconsole netdevsim
| [   28.285343][  T358] Tainted: [B]=BAD_PAGE
[   28.285503][  T358] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   28.285843][  T358] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3))
[   28.286077][  T358] Code: a2 b5 02 80 fb 01 0f 87 db 6e d8 fe 83 e3 01 0f 85 51 ff ff ff c6 05 c2 a2 b5 02 01 90 48 c7 c7 60 a8 c5 bb e8 72 c3 17 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 20 69 a0 ff e9 ba fe ff ff
All code
========
   0:	a2 b5 02 80 fb 01 0f 	movabs %al,0xdb870f01fb8002b5
   7:	87 db 
   9:	6e                   	outsb  %ds:(%rsi),(%dx)
   a:	d8 fe                	fdivr  %st(6),%st
   c:	83 e3 01             	and    $0x1,%ebx
   f:	0f 85 51 ff ff ff    	jne    0xffffffffffffff66
  15:	c6 05 c2 a2 b5 02 01 	movb   $0x1,0x2b5a2c2(%rip)        # 0x2b5a2de
  1c:	90                   	nop
  1d:	48 c7 c7 60 a8 c5 bb 	mov    $0xffffffffbbc5a860,%rdi
  24:	e8 72 c3 17 ff       	call   0xffffffffff17c39b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	e9 33 ff ff ff       	jmp    0xffffffffffffff66
  33:	48 89 df             	mov    %rbx,%rdi
  36:	e8 20 69 a0 ff       	call   0xffffffffffa0695b
  3b:	e9 ba fe ff ff       	jmp    0xfffffffffffffefa

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	e9 33 ff ff ff       	jmp    0xffffffffffffff3c
   9:	48 89 df             	mov    %rbx,%rdi
   c:	e8 20 69 a0 ff       	call   0xffffffffffa06931
  11:	e9 ba fe ff ff       	jmp    0xfffffffffffffed0
[   28.286792][  T358] RSP: 0000:ffffc90000b471f0 EFLAGS: 00010286
[   28.287028][  T358] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   28.287393][  T358] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   28.287673][  T358] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff78be134
[   28.287943][  T358] R10: 0000000000000003 R11: ffffc90000b46d18 R12: 0000000000000001
[   28.288326][  T358] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[   28.288600][  T358] FS:  00007f1e0c38c800(0000) GS:ffff888078881000(0000) knlGS:0000000000000000
[   28.289005][  T358] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.289242][  T358] CR2: 0000000000401138 CR3: 0000000005200005 CR4: 0000000000772ef0
[   28.289523][  T358] PKRU: 55555554
[   28.289671][  T358] Call Trace:
[   28.289915][  T358]  <TASK>
[   28.290025][  T358]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   28.290262][  T358]  ? dev_ingress_queue_create (net/core/dev.c:12299)
[   28.290453][  T358]  ? generic_xdp_install (net/core/dev.c:11630)
[   28.290643][  T358]  ? unregister_netdevice_many (net/core/dev.c:12241)
[   28.290940][  T358]  rtnl_dellink (net/core/rtnetlink.c:3580)
[   28.291134][  T358]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   28.291378][  T358]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   28.291670][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.291863][  T358]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   28.292047][  T358]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   28.292238][  T358]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   28.292525][  T358]  ? valid_bridge_getlink_req.constprop.0 (net/core/rtnetlink.c:3536)
[   28.292756][  T358]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   28.292946][  T358]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   28.293127][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.293411][  T358]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   28.293607][  T358]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   28.293789][  T358]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   28.293979][  T358]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   28.294261][  T358]  ? 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)
[   28.294455][  T358]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   28.294644][  T358]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   28.294830][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.295112][  T358]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   28.295302][  T358]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   28.295492][  T358]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   28.295678][  T358]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   28.295963][  T358]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   28.296147][  T358]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   28.296375][  T358]  ? __copy_msghdr (net/socket.c:2556)
[   28.296566][  T358]  ? do_wp_page (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/linux/pgtable.h:136 mm/memory.c:4135)
[   28.296850][  T358]  ___sys_sendmsg (net/socket.c:2686)
[   28.297032][  T358]  ? copy_msghdr_from_user (net/socket.c:2673)
[   28.297224][  T358]  ? do_pte_missing (mm/memory.c:6134)
[   28.297404][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.297702][  T358]  ? __handle_mm_fault (mm/memory.c:6318)
[   28.297893][  T358]  ? __pmd_alloc (mm/memory.c:6229)
[   28.298077][  T358]  ? lock_vma_under_rcu (mm/mmap_lock.c:226)
[   28.298268][  T358]  ? lock_vma_under_rcu (mm/mmap_lock.c:259)
[   28.298554][  T358]  __sys_sendmsg (net/socket.c:2716)
[   28.298737][  T358]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   28.298925][  T358]  ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532)
[   28.299119][  T358]  ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mmap_lock.h:143 ./include/linux/mmap_lock.h:182 arch/x86/mm/fault.c:1338)
[   28.299314][  T358]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   28.299516][  T358]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   28.299700][  T358]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   28.299926][  T358] RIP: 0033:0x7f1e0c55a1d7
[   28.300229][  T358] 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)
[   28.300959][  T358] RSP: 002b:00007ffe5ae91998 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   28.301238][  T358] RAX: ffffffffffffffda RBX: 00007ffe5ae920d0 RCX: 00007f1e0c55a1d7
[   28.301516][  T358] RDX: 0000000000000000 RSI: 00007ffe5ae91a00 RDI: 0000000000000005
[   28.301881][  T358] RBP: 0000000000000000 R08: 000000000000002c R09: 0000000000000008
[   28.302150][  T358] R10: 0000000000403668 R11: 0000000000000246 R12: 00007ffe5ae920e8
[   28.302530][  T358] R13: 00000000690df963 R14: 0000000000499600 R15: 0000000000000000
| [   30.111293][  T233] ------------[ cut here ]------------
| [   30.111570][  T233] kernel BUG at net/core/net-sysfs.c:2246!
| [   30.111837][  T233] Oops: invalid opcode: 0000 [#1] SMP KASAN
| [   30.112558][  T233] Tainted: [B]=BAD_PAGE, [W]=WARN
[   30.112767][  T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   30.113033][  T233] RIP: 0010:netdev_release (net/core/net-sysfs.c:2246 net/core/net-sysfs.c:2242)
[   30.113277][  T233] Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 20 48 8b bb d0 fa ff ff e8 9c be cd fe 48 89 ef 5b 5d e9 62 cb cd fe 90 <0f> 0b e8 0a a2 d4 fe eb bc e8 63 a2 d4 fe eb d9 90 f3 0f 1e fa 0f
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	00 fc                	add    %bh,%ah
   4:	ff                   	lcall  (bad)
   5:	df 48 89             	fisttps -0x77(%rax)
   8:	fa                   	cli
   9:	48 c1 ea 03          	shr    $0x3,%rdx
   d:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  11:	75 20                	jne    0x33
  13:	48 8b bb d0 fa ff ff 	mov    -0x530(%rbx),%rdi
  1a:	e8 9c be cd fe       	call   0xfffffffffecdbebb
  1f:	48 89 ef             	mov    %rbp,%rdi
  22:	5b                   	pop    %rbx
  23:	5d                   	pop    %rbp
  24:	e9 62 cb cd fe       	jmp    0xfffffffffecdcb8b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	e8 0a a2 d4 fe       	call   0xfffffffffed4a23b
  31:	eb bc                	jmp    0xffffffffffffffef
  33:	e8 63 a2 d4 fe       	call   0xfffffffffed4a29b
  38:	eb d9                	jmp    0x13
  3a:	90                   	nop
  3b:	f3 0f 1e fa          	endbr64
  3f:	0f                   	.byte 0xf

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	e8 0a a2 d4 fe       	call   0xfffffffffed4a211
   7:	eb bc                	jmp    0xffffffffffffffc5
   9:	e8 63 a2 d4 fe       	call   0xfffffffffed4a271
   e:	eb d9                	jmp    0xffffffffffffffe9
  10:	90                   	nop
  11:	f3 0f 1e fa          	endbr64
  15:	0f                   	.byte 0xf
[   30.114014][  T233] RSP: 0018:ffffc90000ac78a8 EFLAGS: 00010297
[   30.114297][  T233] RAX: 0000000000000000 RBX: ffff888004fea660 RCX: ffffffffbb84cb51
[   30.114603][  T233] RDX: 1ffff110009fd4c8 RSI: ffffffffbbc5f0c0 RDI: ffff888004fea640
[   30.114912][  T233] RBP: ffff888004fea000 R08: 0000000000000001 R09: ffffed10009fd4d3
[   30.115241][  T233] R10: ffff888004fea69b R11: ffffffffb9849818 R12: ffff888009e38800
[   30.115552][  T233] R13: 0000000000000000 R14: dead000000000122 R15: dead000000000100
[   30.115859][  T233] FS:  00007f1c97e54000(0000) GS:ffff888078901000(0000) knlGS:0000000000000000
[   30.116243][  T233] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   30.116500][  T233] CR2: 00007f1c97eb4610 CR3: 000000000918d001 CR4: 0000000000772ef0
[   30.116814][  T233] PKRU: 55555554
[   30.116975][  T233] Call Trace:
[   30.117144][  T233]  <TASK>
[   30.117248][  T233]  device_release (drivers/base/core.c:2570)
[   30.117462][  T233]  kobject_cleanup (lib/kobject.c:693)
[   30.117670][  T233]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   30.117878][  T233]  ? generic_xdp_install (net/core/dev.c:11630)
[   30.118092][  T233]  ? kfree (mm/slub.c:6630 mm/slub.c:6837)
[   30.118264][  T233] nsim_destroy (drivers/net/netdevsim/netdev.c:1186) netdevsim
[   30.118480][  T233] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:441 drivers/net/netdevsim/dev.c:1474) netdevsim
[   30.118737][  T233] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1483 drivers/net/netdevsim/dev.c:1707) netdevsim
[   30.119000][  T233] nsim_drv_remove (drivers/net/netdevsim/dev.c:1724) netdevsim
[   30.119243][  T233]  device_release_driver_internal (drivers/base/dd.c:1276 drivers/base/dd.c:1297)
[   30.119533][  T233]  ? klist_put (lib/klist.c:220)
[   30.119687][  T233]  bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:586)
[   30.119895][  T233]  device_del (drivers/base/core.c:3879)
[   30.120068][  T233]  ? __device_link_del (drivers/base/core.c:3833)
[   30.120296][  T233]  device_unregister (drivers/base/core.c:3796 drivers/base/core.c:3920)
[   30.120507][  T233] del_device_store (drivers/net/netdevsim/bus.c:248) netdevsim
[   30.120781][  T233]  ? sysfs_file_kobj (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/linux/rcupdate.h:1195 fs/sysfs/file.c:24)
[   30.120996][  T233]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   30.121232][  T233]  ? nsim_bus_dev_numvfs_show (drivers/net/netdevsim/bus.c:215) netdevsim
[   30.121522][  T233]  ? sysfs_file_kobj (fs/sysfs/file.c:26)
[   30.121727][  T233]  ? sysfs_file_ops (fs/sysfs/file.c:135)
[   30.121927][  T233]  kernfs_fop_write_iter (fs/kernfs/file.c:88 fs/kernfs/file.c:356)
[   30.122158][  T233]  vfs_write (fs/read_write.c:594 fs/read_write.c:686)
[   30.122322][  T233]  ? kernel_write (fs/read_write.c:667)
[   30.122526][  T233]  ? lock_vma_under_rcu (mm/mmap_lock.c:259)
[   30.122731][  T233]  ? __handle_mm_fault (mm/memory.c:6454)
[   30.122944][  T233]  ksys_write (fs/read_write.c:738)
[   30.123128][  T233]  ? __ia32_sys_read (fs/read_write.c:728)
[   30.123336][  T233]  ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mmap_lock.h:143 ./include/linux/mmap_lock.h:182 arch/x86/mm/fault.c:1338)
[   30.123543][  T233]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   30.123749][  T233]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   30.124010][  T233] RIP: 0033:0x7f1c97f54257
[   30.124253][  T233] Code: 0f 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:	0f 00                	(bad)
   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
[   30.124980][  T233] RSP: 002b:00007fffacd16818 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   30.125312][  T233] RAX: ffffffffffffffda RBX: 00007f1c98050780 RCX: 00007f1c97f54257
[   30.125620][  T233] RDX: 0000000000000004 RSI: 00005568ed80b6f0 RDI: 0000000000000001
[   30.125924][  T233] RBP: 0000000000000004 R08: 0000000000000000 R09: 00007f1c98006d20
[   30.126257][  T233] R10: 00007f1c98006c20 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
netdev_release:device_release:kobject_cleanup:netdev_run_todo:nsim_destroy
refcount_warn_saturate:netdev_run_todo:rtnl_dellink:rtnetlink_rcv_msg:netlink_rcv_skb
print_report:kasan_report:kobject_put:netdev_run_todo:rtnl_dellink