non-slab/vmalloc memory
list_add corruption. prev->next should be next (ffffffff8f56ea80), but was 0000000000000000. (prev=ffff88805bb24250).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:34!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 980 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: events request_module_async
RIP: 0010:__list_add_valid_or_report+0x123/0x130 lib/list_debug.c:32
Code: e8 02 8e 25 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 13 59 47 fd 49 8b 16 48 c7 c7 a0 3f 05 8c 48 89 de 4c 89 f1 e8 ee 48 4a fc 90 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000392f9e0 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffffff8f56ea80 RCX: 78e085ad48f03300
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffffffff1eadd51 R08: ffffc9000392f707 R09: 1ffff92000725ee0
R10: dffffc0000000000 R11: fffff52000725ee1 R12: 1ffff1100b76484a
R13: dffffc0000000000 R14: ffff88805bb24250 R15: ffff88807be00250
FS:  0000000000000000(0000) GS:ffff8881257a2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3c225e CR3: 0000000032ffe000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add_tail include/linux/list.h:191 [inline]
 em28xx_init_extension+0x56/0x1c0 drivers/media/usb/em28xx/em28xx-core.c:1114
 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+0x123/0x130 lib/list_debug.c:32
Code: e8 02 8e 25 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 13 59 47 fd 49 8b 16 48 c7 c7 a0 3f 05 8c 48 89 de 4c 89 f1 e8 ee 48 4a fc 90 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000392f9e0 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffffff8f56ea80 RCX: 78e085ad48f03300
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffffffff1eadd51 R08: ffffc9000392f707 R09: 1ffff92000725ee0
R10: dffffc0000000000 R11: fffff52000725ee1 R12: 1ffff1100b76484a
R13: dffffc0000000000 R14: ffff88805bb24250 R15: ffff88807be00250
FS:  0000000000000000(0000) GS:ffff8881257a2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3c225e CR3: 000000007caf4000 CR4: 00000000003526f0