non-slab/vmalloc memory
list_add corruption. prev->next should be next (ffffffff8a2a1760), but was ffffffff81de5343. (prev=ffff88811cb6c250).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:32!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 1118 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
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 c0 7b 89 87 48 89 ee e8 c6 4d ce fe 90 <0f> 0b 48 89 f2 48 89 e9 4c 89 e6 48 c7 c7 40 7c 89 87 e8 ae 4d ce
RSP: 0018:ffffc9000193fbe0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8881360bdac8 RCX: ffffffff815d3269
RDX: 0000000000000000 RSI: ffffffff815dad96 RDI: 0000000000000005
RBP: ffffffff8a2a1760 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8881360bc250
R13: ffffffff8a2a1768 R14: ffffffff8aa0f854 R15: ffffc9000193fd10
FS:  0000000000000000(0000) GS:ffff888268fa0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9b1deb8e9c CR3: 00000000090a4000 CR4: 00000000003506f0
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+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:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x56d/0x700 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+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 c0 7b 89 87 48 89 ee e8 c6 4d ce fe 90 <0f> 0b 48 89 f2 48 89 e9 4c 89 e6 48 c7 c7 40 7c 89 87 e8 ae 4d ce
RSP: 0018:ffffc9000193fbe0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8881360bdac8 RCX: ffffffff815d3269
RDX: 0000000000000000 RSI: ffffffff815dad96 RDI: 0000000000000005
RBP: ffffffff8a2a1760 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8881360bc250
R13: ffffffff8a2a1768 R14: ffffffff8aa0f854 R15: ffffc9000193fd10
FS:  0000000000000000(0000) GS:ffff888268fa0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9b1deb8e9c CR3: 00000000090a4000 CR4: 00000000003506f0