[ 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 '10.128.0.18' (ECDSA) to the list of known hosts. syzkaller login: [ 54.300832][ T2932] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 54.550780][ T2932] usb 1-1: Using ep0 maxpacket: 16 [ 54.670887][ T2932] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 54.682730][ T2932] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 54.697104][ T2932] usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.07 [ 54.706816][ T2932] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 54.717878][ T2932] usb 1-1: config 0 descriptor?? [ 55.205935][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.213963][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.221718][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.228937][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.236348][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.243672][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.251747][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.259194][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.266456][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.273721][ T2932] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 55.281659][ T2932] HID 045e:07da: Invalid code 65791 type 1 [ 55.290095][ T2932] ------------[ cut here ]------------ [ 55.295639][ T2932] init_uevent_argv: buffer size too small [ 55.301979][ T2932] WARNING: CPU: 1 PID: 2932 at lib/kobject_uevent.c:259 kobject_uevent_env+0x1640/0x1680 [ 55.311889][ T2932] Modules linked in: [ 55.315815][ T2932] CPU: 1 PID: 2932 Comm: kworker/1:2 Not tainted 5.12.0-rc6-syzkaller #0 [ 55.324317][ T2932] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.334463][ T2932] Workqueue: usb_hub_wq hub_event [ 55.339513][ T2932] RIP: 0010:kobject_uevent_env+0x1640/0x1680 [ 55.345557][ T2932] Code: 8c e8 24 a1 fe ff e9 cf f8 ff ff 48 8b 3c 24 e8 a6 6d d5 fd e9 a9 f8 ff ff e8 dc c2 91 fd 48 c7 c7 40 44 c5 89 e8 4c ba df 04 <0f> 0b 41 bf f4 ff ff ff e9 51 ec ff ff 4c 89 ff e8 fb 6c d5 fd e9 [ 55.365239][ T2932] RSP: 0018:ffffc900022fe858 EFLAGS: 00010282 [ 55.371373][ T2932] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 [ 55.379348][ T2932] RDX: ffff888019f49c40 RSI: ffffffff815c4cb5 RDI: fffff5200045fcfd [ 55.387383][ T2932] RBP: 00000000000007fb R08: 0000000000000000 R09: 0000000000000000 [ 55.395405][ T2932] R10: ffffffff815bda4e R11: 0000000000000000 R12: 0000000000000005 [