1024-page vmalloc region starting at 0xffffc9000da1a000 allocated at kco[  753.277993][ T9733]  1024-page vmalloc region starting at 0xffffc9000da1a000 allocated at kcov_ioctl+0x58/0x650 kernel/kcov.c:716
list_add corruption. next->prev should be prev (ffffffff8d5fda80), but was 0000000000000000. (next=ffffc9000da1a000).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:31!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 9733 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:__list_add_valid_or_report+0xf4/0x130 lib/list_debug.c:29
Code: c4 7d fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8 e3 c4 9d fd 48 8b 53 08 48 c7 c7 20 df 3d 8b 4c 89 f6 48 89 d9 e8 5d 89 a4 fc 90 <0f> 0b 4c 89 f7 e8 82 c4 7d fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 b3
RSP: 0018:ffffc9000521f6f0 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffc9000da1a000 RCX: 595b4877eecf3c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff92001b43401 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101710487b R12: ffffc9000da1a008
R13: dffffc0000000000 R14: ffffffff8d5fda80 R15: ffffc9001a846000
FS:  0000000000000000(0000) GS:ffff888126df9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34d1dff8 CR3: 000000006a8d8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add include/linux/list.h:177 [inline]
 kcov_remote_area_put kernel/kcov.c:156 [inline]
 kcov_remote_stop+0x52d/0x660 kernel/kcov.c:1060
 hub_event+0x45d2/0x4a20 drivers/usb/core/hub.c:5997
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xf4/0x130 lib/list_debug.c:29
Code: c4 7d fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8 e3 c4 9d fd 48 8b 53 08 48 c7 c7 20 df 3d 8b 4c 89 f6 48 89 d9 e8 5d 89 a4 fc 90 <0f> 0b 4c 89 f7 e8 82 c4 7d fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 b3
RSP: 0018:ffffc9000521f6f0 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffc9000da1a000 RCX: 595b4877eecf3c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff92001b43401 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101710487b R12: ffffc9000da1a008
R13: dffffc0000000000 R14: ffffffff8d5fda80 R15: ffffc9001a846000
FS:  0000000000000000(0000) GS:ffff888126df9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34d1dff8 CR3: 000000006a8d8000 CR4: 00000000003526f0