list_add corruption. prev->next should be next (ffffffff8fddbf80), but was ffffffff89aed5b5. (prev=ffff8880691ac250).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:32!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 980 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events request_module_async
RIP: 0010:__list_add_valid_or_report+0x12b/0x190 lib/list_debug.c:32
Code: 00 00 00 00 fc ff df 48 89 f2 48 c1 ea 03 80 3c 02 00 75 5a 48 8b 16 48 89 f1 48 c7 c7 00 2b 16 8c 48 89 ee e8 96 77 af fc 90 <0f> 0b 48 89 f2 48 89 e9 4c 89 e6 48 c7 c7 80 2b 16 8c e8 7e 77 af
RSP: 0018:ffffc90003a97be0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff88804b15daf8 RCX: ffffffff819a4bd9
RDX: 0000000000000000 RSI: ffffffff819aca76 RDI: 0000000000000005
RBP: ffffffff8fddbf80 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff88804b15c250
R13: ffffffff8fddbf88 R14: ffffffff90ab7e54 R15: ffffc90003a97d10
FS:  0000000000000000(0000) GS:ffff8881247b9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa2e34f5d63 CR3: 00000000627c6000 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]
 em28xx_init_extension+0x48/0x200 drivers/media/usb/em28xx/em28xx-core.c:1114
 request_module_async+0x61/0x70 drivers/media/usb/em28xx/em28xx-cards.c:3457
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 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+0x12b/0x190 lib/list_debug.c:32
Code: 00 00 00 00 fc ff df 48 89 f2 48 c1 ea 03 80 3c 02 00 75 5a 48 8b 16 48 89 f1 48 c7 c7 00 2b 16 8c 48 89 ee e8 96 77 af fc 90 <0f> 0b 48 89 f2 48 89 e9 4c 89 e6 48 c7 c7 80 2b 16 8c e8 7e 77 af
RSP: 0018:ffffc90003a97be0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff88804b15daf8 RCX: ffffffff819a4bd9
RDX: 0000000000000000 RSI: ffffffff819aca76 RDI: 0000000000000005
RBP: ffffffff8fddbf80 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff88804b15c250
R13: ffffffff8fddbf88 R14: ffffffff90ab7e54 R15: ffffc90003a97d10
FS:  0000000000000000(0000) GS:ffff8881247b9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000019680 CR3: 000000004b2e6000 CR4: 00000000003526f0