list_add double add: new=ffff88802a7b9518, prev=ffff88802a7b9518, next=ffff8880294db078.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:35!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 7106 Comm: syz.3.155 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__list_add_valid_or_report+0x143/0x190 lib/list_debug.c:35
Code: 89 f1 48 c7 c7 80 2f 16 8c 48 89 ee e8 46 3a af fc 90 0f 0b 48 89 f2 48 89 e9 4c 89 e6 48 c7 c7 00 30 16 8c e8 2e 3a af fc 90 <0f> 0b 48 89 f7 48 89 34 24 e8 2f ec 36 fd 48 8b 34 24 e9 07 ff ff
RSP: 0018:ffffc900043ff798 EFLAGS: 00010086
RAX: 0000000000000058 RBX: ffff88802a7b9500 RCX: ffffffff819a4e09
RDX: 0000000000000000 RSI: ffffffff819acca6 RDI: 0000000000000005
RBP: ffff8880294db078 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000004 R11: 0000000000000001 R12: ffff88802a7b9518
R13: ffff8880294db080 R14: 0000000000000000 R15: ffff88802a7b9518
FS:  00007f90e82da6c0(0000) GS:ffff8881246b5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c007255000 CR3: 00000000782fc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:88 [inline]
 __list_add include/linux/list.h:150 [inline]
 list_add_tail include/linux/list.h:183 [inline]
 usb_hcd_link_urb_to_ep+0x220/0x3a0 drivers/usb/core/hcd.c:1158
 dummy_urb_enqueue+0x2a7/0x920 drivers/usb/gadget/udc/dummy_hcd.c:1288
 usb_hcd_submit_urb+0x258/0x1c60 drivers/usb/core/hcd.c:1546
 usb_submit_urb+0x890/0x1770 drivers/usb/core/urb.c:581
 cm109_submit_buzz_toggle+0xd9/0x180 drivers/input/misc/cm109.c:351
 cm109_toggle_buzzer_async+0xa8/0xc0 drivers/input/misc/cm109.c:484
 cm109_input_ev+0x171/0x1b0 drivers/input/misc/cm109.c:615
 input_event_dispose drivers/input/input.c:321 [inline]
 input_handle_event+0x151/0x14d0 drivers/input/input.c:369
 input_inject_event+0x1e8/0x3b0 drivers/input/input.c:423
 kd_sound_helper+0x17a/0x280 drivers/tty/vt/keyboard.c:256
 input_handler_for_each_handle+0xd7/0x250 drivers/input/input.c:2554
 kd_mksound+0x88/0x130 drivers/tty/vt/keyboard.c:280
 vt_k_ioctl drivers/tty/vt/vt_ioctl.c:303 [inline]
 vt_ioctl+0x103a/0x30a0 drivers/tty/vt/vt_ioctl.c:751
 tty_ioctl+0x661/0x1680 drivers/tty/tty_io.c:2792
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f90e738e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f90e82da038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f90e75b5fa0 RCX: 00007f90e738e929
RDX: 0000000000000000 RSI: 0000000000004b2f RDI: 0000000000000005
RBP: 00007f90e7410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f90e75b5fa0 R15: 00007fff12884d88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0x143/0x190 lib/list_debug.c:35
Code: 89 f1 48 c7 c7 80 2f 16 8c 48 89 ee e8 46 3a af fc 90 0f 0b 48 89 f2 48 89 e9 4c 89 e6 48 c7 c7 00 30 16 8c e8 2e 3a af fc 90 <0f> 0b 48 89 f7 48 89 34 24 e8 2f ec 36 fd 48 8b 34 24 e9 07 ff ff
RSP: 0018:ffffc900043ff798 EFLAGS: 00010086
RAX: 0000000000000058 RBX: ffff88802a7b9500 RCX: ffffffff819a4e09
RDX: 0000000000000000 RSI: ffffffff819acca6 RDI: 0000000000000005
RBP: ffff8880294db078 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000004 R11: 0000000000000001 R12: ffff88802a7b9518
R13: ffff8880294db080 R14: 0000000000000000 R15: ffff88802a7b9518
FS:  00007f90e82da6c0(0000) GS:ffff8881246b5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c007255000 CR3: 00000000782fc000 CR4: 00000000003526f0