em28xx 1-1:0.249: New device   @ 480 Mbps (2040:826d, interface 249, class 249)
em28xx 1-1:0.249: Audio interface 249 found (Vendor Class)
em28xx 1-1:0.249: unknown em28xx chip ID (0)
em28xx 1-1:0.249: Config register raw data: 0xfffffffb
em28xx 1-1:0.249: AC97 chip type couldn't be determined
em28xx 1-1:0.249: No AC97 audio processor
list_add corruption. prev->next should be next (ffffffff87a79200), but was ffffffff836c2ddd. (prev=ffff8881cdb74250).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:26!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 0 PID: 167 Comm: kworker/0:3 Not tainted 5.7.0-rc6-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 00 52 fc 85 e8 24 9d 3d ff 0f 0b 48 89 f1 48 c7 c7 80 51 fc 85 4c 89 e6 e8 10 9d 3d ff <0f> 0b 48 89 ee 48 c7 c7 20 53 fc 85 e8 ff 9c 3d ff 0f 0b 4c 89 ea
RSP: 0018:ffff8881cd66eff0 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff8881cc508130 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff812a339d RDI: ffffed1039acddf0
RBP: ffff8881cc508250 R08: 0000000000000075 R09: ffffed103b646292
R10: ffff8881db23148f R11: ffffed103b646291 R12: ffffffff87a79200
R13: ffff8881cc508000 R14: ffff8881cc50813c R15: ffff8881cd374000
FS:  0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ee023dc160 CR3: 00000001d207c000 CR4: 00000000001406f0
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:1125
 em28xx_init_dev.isra.0+0xa80/0x15dd drivers/media/usb/em28xx/em28xx-cards.c:3558
 em28xx_usb_probe.cold+0xcac/0x2520 drivers/media/usb/em28xx/em28xx-cards.c:3907
 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374
 really_probe+0x290/0xac0 drivers/base/dd.c:520
 driver_probe_device+0x223/0x350 drivers/base/dd.c:697
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:804
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x21a/0x390 drivers/base/dd.c:870
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1367/0x1c40 drivers/base/core.c:2538
 usb_set_configuration+0xed4/0x1850 drivers/usb/core/message.c:2032
 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241
 usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272
 really_probe+0x290/0xac0 drivers/base/dd.c:520
 driver_probe_device+0x223/0x350 drivers/base/dd.c:697
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:804
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x21a/0x390 drivers/base/dd.c:870
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1367/0x1c40 drivers/base/core.c:2538
 usb_new_device.cold+0x552/0xf6e drivers/usb/core/hub.c:2554
 hub_port_connect drivers/usb/core/hub.c:5208 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x226d/0x43c0 drivers/usb/core/hub.c:5576
 process_one_work+0x965/0x1630 kernel/workqueue.c:2268
 process_scheduled_works kernel/workqueue.c:2330 [inline]
 worker_thread+0x7ab/0xe20 kernel/workqueue.c:2416
 kthread+0x326/0x430 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
Modules linked in:
---[ end trace a8ebe843b29be714 ]---
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 00 52 fc 85 e8 24 9d 3d ff 0f 0b 48 89 f1 48 c7 c7 80 51 fc 85 4c 89 e6 e8 10 9d 3d ff <0f> 0b 48 89 ee 48 c7 c7 20 53 fc 85 e8 ff 9c 3d ff 0f 0b 4c 89 ea
RSP: 0018:ffff8881cd66eff0 EFLAGS: 00010282
RAX: 0000000000000075 RBX: ffff8881cc508130 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff812a339d RDI: ffffed1039acddf0
RBP: ffff8881cc508250 R08: 0000000000000075 R09: ffffed103b646292
R10: ffff8881db23148f R11: ffffed103b646291 R12: ffffffff87a79200
R13: ffff8881cc508000 R14: ffff8881cc50813c R15: ffff8881cd374000
FS:  0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ee023dc160 CR3: 00000001d207c000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400