[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.10.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.887608][ T2727] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 43.127429][ T2727] usb 1-1: Using ep0 maxpacket: 8 [ 43.247496][ T2727] usb 1-1: config 0 has an invalid descriptor of length 36, skipping remainder of the config [ 43.258580][ T2727] usb 1-1: New USB device found, idVendor=0bd3, idProduct=0555, bcdDevice=69.6a [ 43.268873][ T2727] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 43.279577][ T2727] usb 1-1: config 0 descriptor?? [ 43.767223][ T2727] uvcvideo: Found UVC 0.00 device (0bd3:0555) [ 43.774354][ T2727] uvcvideo 1-1:0.0: Entity type for entity Й was not initialized! [ 43.783020][ T2727] uvcvideo 1-1:0.0: Entity type for entity Processing 1 was not initialized! [ 43.792346][ T2727] uvcvideo 1-1:0.0: Entity type for entity Input 255 was not initialized! [ 43.801504][ T2727] ------------[ cut here ]------------ [ 43.807009][ T2727] WARNING: CPU: 0 PID: 2727 at drivers/media/mc/mc-entity.c:669 media_create_pad_link+0x96b/0xab0 [ 43.817573][ T2727] Kernel panic - not syncing: panic_on_warn set ... [ 43.824132][ T2727] CPU: 0 PID: 2727 Comm: kworker/0:4 Not tainted 5.7.0-rc6-syzkaller #0 [ 43.832426][ T2727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.842867][ T2727] Workqueue: usb_hub_wq hub_event [ 43.847878][ T2727] Call Trace: [ 43.851339][ T2727] dump_stack+0x1e9/0x30e [ 43.855662][ T2727] panic+0x264/0x7a0 [ 43.859577][ T2727] ? __warn+0x102/0x210 [ 43.863714][ T2727] ? media_create_pad_link+0x96b/0xab0 [ 43.869158][ T2727] __warn+0x209/0x210 [ 43.873136][ T2727] ? media_create_pad_link+0x96b/0xab0 [ 43.878591][ T2727] report_bug+0x1ac/0x2d0 [ 43.882900][ T2727] do_error_trap+0xca/0x1c0 [ 43.887391][ T2727] do_invalid_op+0x32/0x40 [ 43.891799][ T2727] ? media_create_pad_link+0x96b/0xab0 [ 43.897241][ T2727] invalid_op+0x23/0x30 [ 43.901392][ T2727] RIP: 0010:media_create_pad_link+0x96b/0xab0 [ 43.907441][ T2727] Code: 0f 0b b8 ea ff ff ff eb e3 e8 e1 3a 06 fc 0f 0b b8 ea ff ff ff eb d5 e8 d3 3a 06 fc 0f 0b b8 ea ff ff ff eb c7 e8 c5 3a 06 fc <0f> 0b b8 ea ff ff ff eb b9 e8 b7 3a 06 fc 0f 0b b8 ea ff ff ff eb [ 43.927031][ T2727] RSP: 0018:ffffc900081d6f20 EFLAGS: 00010293 [ 43.933099][ T2727] RAX: ffffffff856d3c0b RBX: 0000000000000000 RCX: ffff88809fe9c0c0 [ 43.941184][ T2727] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 43.949160][ T2727] RBP: ffff88809e36aa38 R08: ffffffff856d339d R09: ffffed1012f31c98 [ 43.957126][ T2727] R10: ffffed1012f31c98 R11: 0000000000000000 R12: ffff88809e36a870 [ 43.965074][ T2727] R13: dffffc0000