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 (ffffffff8dc1eb40), but was ffffffff84a23308. (prev=ffff888019a9c250).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:28!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4912 Comm: kworker/0:4 Not tainted 5.13.0-rc7-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+0xb6/0xc0 lib/list_debug.c:26
Code: 48 c7 c7 60 a0 92 8a 4c 89 e6 4c 89 f1 31 c0 e8 48 58 64 fd 0f 0b 48 c7 c7 20 a1 92 8a 4c 89 f6 4c 89 e1 31 c0 e8 32 58 64 fd <0f> 0b 0f 1f 84 00 00 00 00 00 41 57 41 56 41 54 53 49 89 fe 49 bc
RSP: 0018:ffffc900019ee828 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffffff8dc1eb48 RCX: 1693815070d2fc00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff816564b2 R09: ffffed1017345f90
R10: ffffed1017345f90 R11: 0000000000000000 R12: ffff888019a9c250
R13: dffffc0000000000 R14: ffffffff8dc1eb40 R15: ffff88802ac50250
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f372b61b028 CR3: 0000000016b84000 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+0x52/0x1d0 drivers/media/usb/em28xx/em28xx-core.c:1123
 em28xx_init_dev+0x8e9/0x2b40 drivers/media/usb/em28xx/em28xx-cards.c:3630
 em28xx_usb_probe+0x15b1/0x2fc0 drivers/media/usb/em28xx/em28xx-cards.c:3979
 usb_probe_interface+0x633/0xb40 drivers/usb/core/driver.c:396
 really_probe+0x3cb/0x1020 drivers/base/dd.c:580
 driver_probe_device+0x178/0x350 drivers/base/dd.c:763
 bus_for_each_drv+0x16a/0x1f0 drivers/base/bus.c:431
 __device_attach+0x301/0x560 drivers/base/dd.c:938
 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:491
 device_add+0x11fc/0x1670 drivers/base/core.c:3324
 usb_set_configuration+0x1a86/0x2100 drivers/usb/core/message.c:2164
 usb_generic_driver_probe+0x83/0x140 drivers/usb/core/generic.c:238
 usb_probe_device+0x13a/0x260 drivers/usb/core/driver.c:293
 really_probe+0x3cb/0x1020 drivers/base/dd.c:580
 driver_probe_device+0x178/0x350 drivers/base/dd.c:763
 bus_for_each_drv+0x16a/0x1f0 drivers/base/bus.c:431
 __device_attach+0x301/0x560 drivers/base/dd.c:938
 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:491
 device_add+0x11fc/0x1670 drivers/base/core.c:3324
 usb_new_device+0xd45/0x1790 drivers/usb/core/hub.c:2558
 hub_port_connect+0x1055/0x27a0 drivers/usb/core/hub.c:5278
 hub_port_connect_change+0x5d0/0xbf0 drivers/usb/core/hub.c:5418
 port_event+0xaee/0x1140 drivers/usb/core/hub.c:5564
 hub_event+0x48d/0xd90 drivers/usb/core/hub.c:5646
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276
 process_scheduled_works kernel/workqueue.c:2338 [inline]
 worker_thread+0xe28/0x1300 kernel/workqueue.c:2424
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
---[ end trace 380ef681f90bd4f2 ]---
RIP: 0010:__list_add_valid+0xb6/0xc0 lib/list_debug.c:26
Code: 48 c7 c7 60 a0 92 8a 4c 89 e6 4c 89 f1 31 c0 e8 48 58 64 fd 0f 0b 48 c7 c7 20 a1 92 8a 4c 89 f6 4c 89 e1 31 c0 e8 32 58 64 fd <0f> 0b 0f 1f 84 00 00 00 00 00 41 57 41 56 41 54 53 49 89 fe 49 bc
RSP: 0018:ffffc900019ee828 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffffff8dc1eb48 RCX: 1693815070d2fc00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff816564b2 R09: ffffed1017345f90
R10: ffffed1017345f90 R11: 0000000000000000 R12: ffff888019a9c250
R13: dffffc0000000000 R14: ffffffff8dc1eb40 R15: ffff88802ac50250
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f372b624000 CR3: 0000000018e63000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400