Re: [syzbot] [input?] [usb?] WARNING: ODEBUG bug in hid_device_remove

[syzbot <syzbot+f8fb5598924c7e645553@syzkaller.appspotmail.com>]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING: ODEBUG bug in corsair_remove

usb 2-1: USB disconnect, device number 2
------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88807caa8ac8 object type: work_struct hint: k90_record_led_work+0x0/0x1e0 drivers/hid/hid-corsair.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object+0xec/0x230 lib/debugobjects.c:629, CPU#0: kworker/0:3/5347
Modules linked in:
CPU: 0 UID: 0 PID: 5347 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:debug_print_object+0x18a/0x230 lib/debugobjects.c:629
Code: f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 ed 1f 50 fd 4d 8b 0f 4c 89 ef 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f0 ff 34 24 <67> 48 0f b9 3a 48 83 c4 08 ff 05 d3 3b 93 0b 48 83 c4 10 5b 41 5c
RSP: 0018:ffffc90003256fd0 EFLAGS: 00010246
RAX: 1ffffffff1816f34 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffffffff8c6cbd40 RSI: ffffffff8c6cb7c0 RDI: ffffffff908440b0
RBP: ffffffff8c6cbd40 R08: ffff88807caa8ac8 R09: ffffffff8c0b8bc0
R10: dffffc0000000000 R11: ffffffff818f55b0 R12: 0000000000000000
R13: ffffffff908440b0 R14: ffff88807caa8ac8 R15: ffffffff8c0b79a0
FS:  0000000000000000(0000) GS:ffff888124d03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f89c13212c0 CR3: 00000000765ee000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __debug_check_no_obj_freed lib/debugobjects.c:1171 [inline]
 debug_check_no_obj_freed+0x2e3/0x450 lib/debugobjects.c:1201
 slab_free_hook mm/slub.c:2679 [inline]
 slab_free mm/slub.c:6499 [inline]
 kfree+0x13e/0x650 mm/slub.c:6792
 k90_cleanup_macro_functions drivers/hid/hid-corsair.c:548 [inline]
 corsair_remove+0xfd/0x280 drivers/hid/hid-corsair.c:603
 hid_device_remove+0xc5/0x1c0 drivers/hid/hid-core.c:2901
 device_remove drivers/base/dd.c:616 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x48b/0x880 drivers/base/dd.c:1372
 bus_remove_device+0x444/0x560 drivers/base/bus.c:664
 device_del+0x524/0x8f0 drivers/base/core.c:3965
 hid_remove_device drivers/hid/hid-core.c:3130 [inline]
 hid_destroy_device+0x6b/0x1b0 drivers/hid/hid-core.c:3152
 usbhid_disconnect+0x9f/0xc0 drivers/hid/usbhid/hid-core.c:1479
 usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:461
 device_remove drivers/base/dd.c:618 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x4f5/0x880 drivers/base/dd.c:1372
 bus_remove_device+0x444/0x560 drivers/base/bus.c:664
 device_del+0x524/0x8f0 drivers/base/core.c:3965
 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478
 usb_disconnect+0x346/0x9a0 drivers/usb/core/hub.c:2350
 hub_port_connect drivers/usb/core/hub.c:5420 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5720 [inline]
 port_event drivers/usb/core/hub.c:5884 [inline]
 hub_event+0x1bbb/0x4d30 drivers/usb/core/hub.c:5966
 process_one_work kernel/workqueue.c:3387 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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:	f8                   	clc
   1:	48 c1 e8 03          	shr    $0x3,%rax
   5:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
   9:	74 08                	je     0x13
   b:	4c 89 ff             	mov    %r15,%rdi
   e:	e8 ed 1f 50 fd       	call   0xfd502000
  13:	4d 8b 0f             	mov    (%r15),%r9
  16:	4c 89 ef             	mov    %r13,%rdi
  19:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  1e:	48 89 ea             	mov    %rbp,%rdx
  21:	44 89 e1             	mov    %r12d,%ecx
  24:	4d 89 f0             	mov    %r14,%r8
  27:	ff 34 24             	push   (%rsp)
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	ff 05 d3 3b 93 0b    	incl   0xb933bd3(%rip)        # 0xb933c0c
  39:	48 83 c4 10          	add    $0x10,%rsp
  3d:	5b                   	pop    %rbx
  3e:	41 5c                	pop    %r12


Tested on:

commit:         4477a783 Add linux-next specific files for 20260814
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15087279580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fef10c98738d20b5
dashboard link: https://syzkaller.appspot.com/bug?extid=f8fb5598924c7e645553
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
patch:          https://syzkaller.appspot.com/x/patch.diff?x=17529279580000