non-slab/vmalloc memory
list_add corruption. prev->next should be next (ffffffff8a2781c0), but was 0000000000000000. (prev=ffff88811c828250).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:32!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 38 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: usb_hub_wq hub_event
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 e0 68 89 87 48 89 ee e8 d6 69 ce fe 90 <0f> 0b 48 89 f2 48 89 e9 4c 89 e6 48 c7 c7 60 69 89 87 e8 be 69 ce
RSP: 0018:ffffc90000286e90 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff88812f0c0000 RCX: ffffc9000fed2000
RDX: 0000000000000000 RSI: ffffffff815d7d36 RDI: 0000000000000005
RBP: ffffffff8a2781c0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000d44008 R12: ffff88812f0c0250
R13: ffffffff8a2781c8 R14: ffff88812f0c01a8 R15: ffff88812f0c1a04
FS:  0000000000000000(0000) GS:ffff888268ff4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558ea9bef300 CR3: 0000000129766000 CR4: 00000000003506f0
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
 em28xx_init_dev.constprop.0+0x1a10/0x3170 drivers/media/usb/em28xx/em28xx-cards.c:3679
 em28xx_usb_probe+0x1285/0x3770 drivers/media/usb/em28xx/em28xx-cards.c:4034
 usb_probe_interface+0x303/0xa40 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:959
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1031
 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
 device_add+0x1148/0x1aa0 drivers/base/core.c:3689
 usb_set_configuration+0x1187/0x1e20 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250
 usb_probe_device+0xec/0x3e0 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:959
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1031
 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
 device_add+0x1148/0x1aa0 drivers/base/core.c:3689
 usb_new_device+0xd07/0x1a60 drivers/usb/core/hub.c:2694
 hub_port_connect drivers/usb/core/hub.c:5566 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x2fce/0x5060 drivers/usb/core/hub.c:5952
 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+0x56d/0x700 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 e0 68 89 87 48 89 ee e8 d6 69 ce fe 90 <0f> 0b 48 89 f2 48 89 e9 4c 89 e6 48 c7 c7 60 69 89 87 e8 be 69 ce
RSP: 0018:ffffc90000286e90 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff88812f0c0000 RCX: ffffc9000fed2000
RDX: 0000000000000000 RSI: ffffffff815d7d36 RDI: 0000000000000005
RBP: ffffffff8a2781c0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000d44008 R12: ffff88812f0c0250
R13: ffffffff8a2781c8 R14: ffff88812f0c01a8 R15: ffff88812f0c1a04
FS:  0000000000000000(0000) GS:ffff888268ff4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558ea9bef300 CR3: 0000000129766000 CR4: 00000000003506f0