* [syzbot] [input?] [usb?] WARNING: ODEBUG bug in hid_device_remove
@ 2026-08-15 8:41 syzbot
0 siblings, 0 replies; only message in thread
From: syzbot @ 2026-08-15 8:41 UTC (permalink / raw)
To: linux-input, linux-kernel, linux-usb, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 28d012efb432 Add linux-next specific files for 20260812
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1613f479580000
kernel config: https://syzkaller.appspot.com/x/.config?x=5a13c7bc480b5c3f
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
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17bc1c79580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/de882be6df4b/disk-28d012ef.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/412cb9fb7e2d/vmlinux-28d012ef.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9d7096c27f1b/bzImage-28d012ef.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f8fb5598924c7e645553@syzkaller.appspotmail.com
------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88801faaf2c8 object type: work_struct hint: k90_backlight_work+0x0/0x1c0 drivers/hid/hid-corsair.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object+0xec/0x230 lib/debugobjects.c:629, CPU#1: kworker/1:3/5638
Modules linked in:
CPU: 1 UID: 0 PID: 5638 Comm: kworker/1:3 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 3d dc 4f 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 b3 78 93 0b 48 83 c4 10 5b 41 5c
RSP: 0018:ffffc90003a77008 EFLAGS: 00010246
RAX: 1ffffffff1816f44 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffffffff8c6cc240 RSI: ffffffff8c6cbcc0 RDI: ffffffff9084a330
RBP: ffffffff8c6cc240 R08: ffff88801faaf2c8 R09: ffffffff8c0b8be0
R10: dffffc0000000000 R11: ffffffff818f4a00 R12: 0000000000000000
R13: ffffffff9084a330 R14: ffff88801faaf2c8 R15: ffffffff8c0b7a20
FS: 0000000000000000(0000) GS:ffff888124dfc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa0bbdb3000 CR3: 000000007a984000 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
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 3d dc 4f fd call 0xfd4fdc50
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 b3 78 93 0b incl 0xb9378b3(%rip) # 0xb9378ec
39: 48 83 c4 10 add $0x10,%rsp
3d: 5b pop %rbx
3e: 41 5c pop %r12
---
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2026-08-15 8:41 [syzbot] [input?] [usb?] WARNING: ODEBUG bug in hid_device_remove syzbot
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