[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.41' (ECDSA) to the list of known hosts.
syzkaller login: [   62.839092][   T17] usb 1-1: new high-speed USB device number 2 using dummy_hcd
[   63.199132][   T17] usb 1-1: config 0 interface 0 altsetting 0 has an invalid endpoint with address 0x0, skipping
[   63.210314][   T17] usb 1-1: config 0 interface 0 altsetting 0 has an invalid endpoint descriptor of length 2, skipping
[   63.223098][   T17] usb 1-1: config 0 interface 0 altsetting 0 has 2 endpoint descriptors, different from the interface descriptor's value: 1
[   63.389093][   T17] usb 1-1: New USB device found, idVendor=2040, idProduct=d863, bcdDevice=e4.77
[   63.398305][   T17] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   63.407322][   T17] usb 1-1: Product: syz
[   63.412104][   T17] usb 1-1: Manufacturer: syz
[   63.416699][   T17] usb 1-1: SerialNumber: syz
[   63.425932][   T17] usb 1-1: config 0 descriptor??
[   63.474733][   T17] usb 1-1: dvb_usb_v2: found a 'Hauppauge Mercury' in warm state
[   63.488471][   T17] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[   63.508083][   T17] dvbdev: DVB: registering new adapter (Hauppauge Mercury)
[   63.516635][   T17] usb 1-1: media controller created
[   63.534194][   T17] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[   63.551467][   T17] usb 1-1: selecting invalid altsetting 1
[   63.557232][   T17] set interface failed
[   63.557246][   T17] ------------[ cut here ]------------
[   63.570079][   T17] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
[   63.570175][   T17] WARNING: CPU: 1 PID: 17 at kernel/locking/mutex.c:938 __mutex_lock+0xad3/0x10e0
[   63.586007][   T17] Modules linked in:
[   63.590510][   T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.10.0-rc7-syzkaller #0
[   63.599244][   T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   63.609869][   T17] Workqueue: usb_hub_wq hub_event
[   63.614917][   T17] RIP: 0010:__mutex_lock+0xad3/0x10e0
[   63.620508][   T17] Code: 08 84 d2 0f 85 c8 05 00 00 8b 05 00 86 05 04 85 c0 0f 85 45 f6 ff ff 48 c7 c6 20 50 4b 89 48 c7 c7 e0 4d 4b 89 e8 f9 18 c5 ff <0f