[ 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 '10.128.10.7' (ECDSA) to the list of known hosts. syzkaller login: [ 48.462415][ T7] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 48.702240][ T7] usb 1-1: Using ep0 maxpacket: 16 [ 48.823109][ T7] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 48.834182][ T7] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 48.848287][ T7] usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.07 [ 48.857984][ T7] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 48.872980][ T7] usb 1-1: config 0 descriptor?? [ 49.355558][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.363353][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.370581][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.377885][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.385166][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.392478][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.399810][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.407085][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.414390][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.421803][ T7] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 49.430135][ T7] HID 045e:07da: Invalid code 65791 type 1 [ 49.438806][ T7] ------------[ cut here ]------------ [ 49.444352][ T7] init_uevent_argv: buffer size too small [ 49.450444][ T7] WARNING: CPU: 0 PID: 7 at lib/kobject_uevent.c:259 kobject_uevent_env+0x13dc/0x1730 [ 49.460132][ T7] Modules linked in: [ 49.464102][ T7] CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.12.0-rc6-syzkaller #0 [ 49.472449][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.482564][ T7] Workqueue: usb_hub_wq hub_event [ 49.487598][ T7] RIP: 0010:kobject_uevent_env+0x13dc/0x1730 [ 49.493684][ T7] Code: 20 f3 14 8a 49 c7 c0 c0 f1 14 8a 31 c0 e8 0c cb fa ff e9 6c ef ff ff e8 a2 9d 83 fd 48 c7 c7 00 fb 14 8a 31 c0 e8 f4 81 52 fd <0f> 0b bb f4 ff ff ff 4c 8b 64 24 30 48 8b 2c 24 e9 34 ef ff ff e8 [ 49.513503][ T7] RSP: 0018:ffffc90000cc6900 EFLAGS: 00010246 [ 49.519578][ T7] RAX: cf8a4e0870eb1e00 RBX: ffff888029dd0a1c RCX: ffff88801152b880 [ 49.527716][ T7] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 49.535778][ T7] RBP: 0000000000000005 R08: ffffffff8160b632 R09: ffffed1017383f1c [ 49.543800][ T7] R10: ffffed1017383f1c R11: 0000000000000000 R12: 00000000000007fb [ 49.551773][ T7] R13: dffffc0000000000 R14: 1ffff1