em28xx 1-1:0.237: New device   @ 480 Mbps (2040:826d, interface 237, class 237)
em28xx 1-1:0.237: Audio interface 237 found (Vendor Class)
em28xx 1-1:0.237: unknown em28xx chip ID (0)
em28xx 1-1:0.237: Config register raw data: 0xfffffffb
em28xx 1-1:0.237: AC97 chip type couldn't be determined
em28xx 1-1:0.237: No AC97 audio processor
list_add corruption. prev->next should be next (ffffffff8cc65620), but was ffffffff8906a52d. (prev=ffff88802e2c8250).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:26!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3182 Comm: kworker/0:3 Not tainted 5.14.0-rc1-next-20210715-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
RIP: 0010:__list_add_valid.cold+0x3a/0x3c lib/list_debug.c:26
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 60 ab e3 89 e8 3b 6d f2 ff 0f 0b 48 89 f1 48 c7 c7 e0 aa e3 89 4c 89 e6 e8 27 6d f2 ff <0f> 0b 48 89 ee 48 c7 c7 80 ac e3 89 e8 16 6d f2 ff 0f 0b 4c 89 ea
RSP: 0018:ffffc900023bef48 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8880187cd000 RCX: 0000000000000000
RDX: ffff888020410000 RSI: ffffffff815d87d5 RDI: fffff52000477ddb
RBP: ffff88802b0c4250 R08: 0000000000000075 R09: 0000000000000000
R10: ffffffff815d260e R11: 0000000000000000 R12: ffffffff8cc65620
R13: ffff88802b0c4000 R14: ffff88802b0c413c R15: ffff8880187ce000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d4ead8000 CR3: 000000001dda9000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:67 [inline]
 list_add_tail include/linux/list.h:100 [inline]
 em28xx_init_extension+0x44/0x1f0 drivers/media/usb/em28xx/em28xx-core.c:1123
 em28xx_init_dev.constprop.0+0xa8b/0x172f drivers/media/usb/em28xx/em28xx-cards.c:3630
 em28xx_usb_probe.cold+0xc23/0x2599 drivers/media/usb/em28xx/em28xx-cards.c:3979
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x23c/0xcd0 drivers/base/dd.c:595
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:747
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:777
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:894
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:965
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xc2f/0x2180 drivers/base/core.c:3356
 usb_set_configuration+0x113f/0x1910 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x23c/0xcd0 drivers/base/dd.c:595
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:747
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:777
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:894
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:965
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xc2f/0x2180 drivers/base/core.c:3356
 usb_new_device.cold+0x63f/0x108e drivers/usb/core/hub.c:2559
 hub_port_connect drivers/usb/core/hub.c:5300 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5440 [inline]
 port_event drivers/usb/core/hub.c:5586 [inline]
 hub_event+0x2357/0x4330 drivers/usb/core/hub.c:5668
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
 process_scheduled_works kernel/workqueue.c:2338 [inline]
 worker_thread+0x85c/0x11f0 kernel/workqueue.c:2424
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Modules linked in:
---[ end trace 2e6a6d757a8ff0a1 ]---
RIP: 0010:__list_add_valid.cold+0x3a/0x3c lib/list_debug.c:26
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 60 ab e3 89 e8 3b 6d f2 ff 0f 0b 48 89 f1 48 c7 c7 e0 aa e3 89 4c 89 e6 e8 27 6d f2 ff <0f> 0b 48 89 ee 48 c7 c7 80 ac e3 89 e8 16 6d f2 ff 0f 0b 4c 89 ea
RSP: 0018:ffffc900023bef48 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff8880187cd000 RCX: 0000000000000000
RDX: ffff888020410000 RSI: ffffffff815d87d5 RDI: fffff52000477ddb
RBP: ffff88802b0c4250 R08: 0000000000000075 R09: 0000000000000000
R10: ffffffff815d260e R11: 0000000000000000 R12: ffffffff8cc65620
R13: ffff88802b0c4000 R14: ffff88802b0c413c R15: ffff8880187ce000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d4eae3028 CR3: 000000001dda9000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400