usb 3-1: USB disconnect, device number 85
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Device '1-002c' does not have a release() function, it is broken and must be fixed. See Documentation/core-api/kobject.rst.
WARNING: drivers/base/core.c:2638 at device_release+0x1da/0x270 drivers/base/core.c:2638, CPU#0: kworker/0:2/187
Modules linked in:
CPU: 0 UID: 0 PID: 187 Comm: kworker/0:2 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:device_release+0x1dd/0x270 drivers/base/core.c:2638
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 93 00 00 00 48 8b 6b 50 48 85 ed 74 19 e8 2d 8b af fb 48 8d 3d 26 05 d3 0a 48 89 ee <67> 48 0f b9 3a e9 eb fe ff ff e8 14 8b af fb 48 89 da 48 b8 00 00
RSP: 0018:ffffc9000303f458 EFLAGS: 00010283
RAX: 0000000000013fd5 RBX: ffff88807ee41020 RCX: ffffc9001b6e9000
RDX: 0000000000100000 RSI: ffff888023ae0c60 RDI: ffffffff912ded80
RBP: ffff888023ae0c60 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888057c65800
R13: dffffc0000000000 R14: ffff888023ae0c60 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888123dec000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd3f11ed3e4 CR3: 000000003540e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x640 lib/kobject.c:737
 put_device drivers/base/core.c:3880 [inline]
 device_unregister+0x2f/0xe0 drivers/base/core.c:4003
 i2c_unregister_device+0xf5/0x270 drivers/i2c/i2c-core-base.c:1075
 i2c_deregister_clients+0x255/0x460 drivers/i2c/i2c-core-base.c:1782
 i2c_del_adapter+0x124/0x2d0 drivers/i2c/i2c-core-base.c:1820
 dvb_usb_i2c_exit+0x9f/0xf0 drivers/media/usb/dvb-usb/dvb-usb-i2c.c:46
 dvb_usb_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:144 [inline]
 dvb_usb_device_exit+0x313/0x520 drivers/media/usb/dvb-usb/dvb-usb-init.c:338
 usb_unbind_interface+0x1dd/0x9e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:618 [inline]
 device_remove+0x12a/0x180 drivers/base/dd.c:610
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
 bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
 device_del+0x376/0x9b0 drivers/base/core.c:3961
 usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1478
 usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5415 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5715 [inline]
 port_event drivers/usb/core/hub.c:5879 [inline]
 hub_event+0x1bb1/0x4420 drivers/usb/core/hub.c:5961
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	df 48 89             	fisttps -0x77(%rax)
   3:	fa                   	cli
   4:	48 c1 ea 03          	shr    $0x3,%rdx
   8:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   c:	0f 85 93 00 00 00    	jne    0xa5
  12:	48 8b 6b 50          	mov    0x50(%rbx),%rbp
  16:	48 85 ed             	test   %rbp,%rbp
  19:	74 19                	je     0x34
  1b:	e8 2d 8b af fb       	call   0xfbaf8b4d
  20:	48 8d 3d 26 05 d3 0a 	lea    0xad30526(%rip),%rdi        # 0xad3054d
  27:	48 89 ee             	mov    %rbp,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 eb fe ff ff       	jmp    0xffffff1f
  34:	e8 14 8b af fb       	call   0xfbaf8b4d
  39:	48 89 da             	mov    %rbx,%rdx
  3c:	48                   	rex.W
  3d:	b8                   	.byte 0xb8