[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.181' (ECDSA) to the list of known hosts. syzkaller login: [ 56.479599][ T8] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 56.719690][ T8] usb 1-1: Using ep0 maxpacket: 32 [ 56.839923][ T8] usb 1-1: config 0 has an invalid interface number: 183 but max is 1 [ 56.848814][ T8] usb 1-1: config 0 has an invalid interface association descriptor of length 2, skipping [ 56.859831][ T8] usb 1-1: config 0 has no interface number 1 [ 56.865893][ T8] usb 1-1: config 0 interface 183 altsetting 208 has an invalid endpoint with address 0x0, skipping [ 56.877542][ T8] usb 1-1: config 0 interface 183 altsetting 208 has an invalid endpoint with address 0x0, skipping [ 56.888829][ T8] usb 1-1: config 0 interface 0 has no altsetting 0 [ 56.896126][ T8] usb 1-1: config 0 interface 183 has no altsetting 0 [ 57.059608][ T8] usb 1-1: New USB device found, idVendor=2040, idProduct=d863, bcdDevice= b.76 [ 57.070124][ T8] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 57.078684][ T8] usb 1-1: Product: syz [ 57.082908][ T8] usb 1-1: Manufacturer: syz [ 57.087541][ T8] usb 1-1: SerialNumber: syz [ 57.095206][ T8] usb 1-1: config 0 descriptor?? [ 57.142909][ T8] usb 1-1: dvb_usb_v2: found a 'Hauppauge Mercury' in warm state [ 57.159993][ T8] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 57.170497][ T8] dvbdev: DVB: registering new adapter (Hauppauge Mercury) [ 57.177778][ T8] usb 1-1: media controller created [ 57.189909][ T8] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 57.207196][ T8] usb 1-1: selecting invalid altsetting 1 [ 57.214008][ T8] set interface failed [ 57.214020][ T8] ------------[ cut here ]------------ [ 57.226041][ T8] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 57.226096][ T8] WARNING: CPU: 0 PID: 8 at kernel/locking/mutex.c:941 __mutex_lock+0xbc0/0x10c0 [ 57.241589][ T8] Modules linked in: [ 57.247890][ T8] CPU: 0 PID: 8 Comm: kworker/0:2 Not tainted 5.13.0-rc3-syzkaller #0 [ 57.256564][ T8] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.267048][ T8] Workqueue: usb_hub_wq hub_event [ 57.272301][ T8] RIP: 0010:__mutex_lock+0xbc0/0x10c0 [ 57.277667][ T8] Code: 08 84 d2 0f 85 b7 04 00 00 8b 05 23 9b b1 04 85 c0 0f 85 5d f5 ff ff 48 c7 c6 c0 a7 6b 89 48 c7 c7 80 a5 6b 89 e8 a3 e3 bc ff <0f> 0b e9 43 f5 ff ff 65 48 8b 1c 25 00 f0 01 00 be 08 00 00 00 48 [ 57.298406][ T8] RSP: 0018:ffffc90000cd6dd0 EFLAGS: 00010282 [ 57.304498][ T8] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 57.313295][ T8] RDX: ffff8880123454c0 RSI: ffffffff815cdf95 RDI: fffff5200019adac [ 57.321290][ T8] RBP: ffff8880355709d8 R08: 0000000000000000 R09: 0000000000000000 [ 57.329248][ T8] R10: ffffffff815c7dfe R11: 0000000000000000 R12: 0000000000000000 [ 57.337231][ T8] R13: dffffc0000000000 R14: ffff888035570958 R15: 0000