Warning: Permanently added '10.128.0.171' (ECDSA) to the list of known hosts.
syzkaller login: [   55.522500][   T20] usb 1-1: new high-speed USB device number 2 using dummy_hcd
[   55.892620][   T20] usb 1-1: config 0 interface 0 altsetting 0 has an invalid endpoint with address 0x0, skipping
[   55.905279][   T20] usb 1-1: config 0 interface 0 altsetting 0 has an invalid endpoint descriptor of length 2, skipping
[   55.917599][   T20] usb 1-1: config 0 interface 0 altsetting 0 has 2 endpoint descriptors, different from the interface descriptor's value: 1
[   56.092513][   T20] usb 1-1: New USB device found, idVendor=2040, idProduct=d863, bcdDevice=e4.77
[   56.101907][   T20] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   56.111001][   T20] usb 1-1: Product: syz
[   56.116061][   T20] usb 1-1: Manufacturer: syz
[   56.121337][   T20] usb 1-1: SerialNumber: syz
[   56.129303][   T20] usb 1-1: config 0 descriptor??
[   56.175285][   T20] usb 1-1: dvb_usb_v2: found a 'Hauppauge Mercury' in warm state
[   56.191329][   T20] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[   56.203277][   T20] dvbdev: DVB: registering new adapter (Hauppauge Mercury)
[   56.210622][   T20] usb 1-1: media controller created
[   56.223776][   T20] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[   56.243245][   T20] usb 1-1: selecting invalid altsetting 1
[   56.249090][   T20] set interface failed
[   56.249103][   T20] ------------[ cut here ]------------
[   56.261149][   T20] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
[   56.261209][   T20] WARNING: CPU: 1 PID: 20 at kernel/locking/mutex.c:931 __mutex_lock+0xc0b/0x1120
[   56.277116][   T20] Modules linked in:
[   56.281159][   T20] CPU: 1 PID: 20 Comm: kworker/1:0 Not tainted 5.12.0-rc5-syzkaller #0
[   56.290942][   T20] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   56.301936][   T20] Workqueue: usb_hub_wq hub_event
[   56.307698][   T20] RIP: 0010:__mutex_lock+0xc0b/0x1120
[   56.313829][   T20] Code: 08 84 d2 0f 85 a3 04 00 00 8b 05 08 af c0 04 85 c0 0f 85 12 f5 ff ff 48 c7 c6 20 8b 6b 89 48 c7 c7 e0 88 6b 89 e8 a2 3e bd ff <0f> 0b e9 f8 f4 ff ff 65 48 8b 1c 25 00 f0 01 00 be 08 00 00 00 48
[   56.337949][   T20] RSP: 0018:ffffc90000da6de0 EFLAGS: 00010286
[   56.344926][   T20] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   56.353177][   T20] RDX: ffff888011210000 RSI: ffffffff815c4cf5 RDI: fffff520001b4dae
[   56.361402][   T20] RBP: ffff888018e2d9d8 R08: 0000000000000000 R09: 0000000000000000
[   56.370182][   T20] R10: ffffffff815bda8e R11: 0000000000000000 R12