[info] Using makefile-style concurrent boot in runlevel 2. [ 14.969313][ C1] random: crng init done [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.21' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.194963][ T22] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 42.434937][ T22] usb 1-1: Using ep0 maxpacket: 16 [ 42.555024][ T22] usb 1-1: config 0 has an invalid interface number: 139 but max is 0 [ 42.563305][ T22] usb 1-1: config 0 has no interface number 0 [ 42.569631][ T22] usb 1-1: config 0 interface 139 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 2 [ 42.582653][ T22] usb 1-1: New USB device found, idVendor=0424, idProduct=c001, bcdDevice=18.a9 [ 42.591779][ T22] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 42.601302][ T22] usb 1-1: config 0 descriptor?? [ 42.647526][ T22] usb 1-1: claimed gadget: Vendor=0424 ProdID=c001 Bus=01 Device=02 [ 42.655678][ T22] usb 1-1: device path: /sys/bus/usb/devices/1-1:0.139 [ 42.664034][ T22] most_core: registered new device mdev0 (1-1:0.139) [ 42.827720][ T22] usb 1-1: USB disconnect, device number 2 [ 42.834666][ T22] kasan: CONFIG_KASAN_INLINE enabled [ 42.840233][ T22] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.848347][ T22] general protection fault: 0000 [#1] SMP KASAN [ 42.854569][ T22] CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.2.0-rc1+ #10 [ 42.862008][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.872065][ T22] Workqueue: usb_hub_wq hub_event [ 42.877078][ T22] RIP: 0010:device_del+0x7a/0xb80 [ 42.882133][ T22] Code: c7 40 04 00 07 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 80 00 00 00 31 c0 e8 f1 ba d5 fe 48 8d 7b 40 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 79 0a 00 00 48 8b 43 40 4c 8d a3 80 00 00 00 31 [ 42.901730][ T22] RSP: 0018:ffff8881d9f977d0 EFLAGS: 00010202 [ 42.907781][ T22] RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000000 [ 42.915742][ T22] RDX: 0000000000000000 RSI: ffffffff826710ff RDI: 0000000000000040 [ 42.923881][ T22] RBP: dffffc0000000000 R08: ffff8881d9f88000 R09: ffffed103a17e706 [ 42.931956][ T22] R10: ffffed103a17e705 R11: ffff8881d0bf382f R12: ffff8881cfea00a8 [ 42.939909][ T22] R13: ffff8881d0bf3760 R14: ffff8881cfea0030 R15: 0000000000000000 [ 42.948069][ T22] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 42.957164][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.963734][ T22] CR2: 00000000006cc0a0 CR3: 0000000006e21000 CR4: 00000000001406e0 [ 42.971695][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.979755][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.987712][ T22] Call Trace: [ 42.990993][ T22] ? try_to_del_timer_sync+0xbf/0x110 [ 42.996353][ T22] ? __device_links_no_driver+0x240/0x240 [ 43.002068][ T22] ? mark_held_locks+0x9f/0xe0 [ 43.006811][ T22] ? del_timer_sync+0x121/0x130 [ 43.011853][ T22] device_unregister+0x11/0x30 [ 43.016613][ T22] hdm_disconnect+0xdf/0x200 [ 43.021193][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 43.026384][ T22] ? usb_autoresume_device+0x60/0x60 [ 43.031661][ T22] device_release_driver_internal+0x404/0x4c0 [ 43.037723][ T22] bus_remove_device+0x2dc/0x4a0 [ 43.042639][ T22] device_del+0x460/0xb80 [ 43.046998][ T22] ? __device_links_no_driver+0x240/0x240 [ 43.052716][ T22] ? usb_remove_ep_devs+0x3e/0x80 [ 43.057724][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 43.063010][ T22] usb_disable_device+0x211/0x690 [ 43.068024][ T22] usb_disconnect+0x284/0x830 [ 43.072761][ T22] hub_event+0x1409/0x3590 [ 43.077169][ T22] ? hub_port_debounce+0x260/0x260 [ 43.082271][ T22] process_one_work+0x905/0x1570 [ 43.087204][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 43.092558][ T22] ? do_raw_spin_lock+0x11a/0x280 [ 43.097564][ T22] worker_thread+0x96/0xe20 [ 43.102230][ T22] ? process_one_work+0x1570/0x1570 [ 43.107423][ T22] kthread+0x30b/0x410 [ 43.111472][ T22] ? kthread_park+0x1a0/0x1a0 [ 43.116127][ T22] ret_from_fork+0x24/0x30 [ 43.120517][ T22] Modules linked in: [ 43.124446][ T22] ---[ end trace 1a3ef83321ffb47a ]--- [ 43.130071][ T22] RIP: 0010:device_del+0x7a/0xb80 [ 43.135117][ T22] Code: c7 40 04 00 07 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 80 00 00 00 31 c0 e8 f1 ba d5 fe 48 8d 7b 40 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 79 0a 00 00 48 8b 43 40 4c 8d a3 80 00 00 00 31 [ 43.154735][ T22] RSP: 0018:ffff8881d9f977d0 EFLAGS: 00010202 [ 43.160962][ T22] RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000000 [ 43.169171][ T22] RDX: 0000000000000000 RSI: ffffffff826710ff RDI: 0000000000000040 [ 43.177159][ T22] RBP: dffffc0000000000 R08: ffff8881d9f88000 R09: ffffed103a17e706 [ 43.185137][ T22] R10: ffffed103a17e705 R11: ffff8881d0bf382f R12: ffff8881cfea00a8 [ 43.193116][ T22] R13: ffff8881d0bf3760 R14: ffff8881cfea0030 R15: 0000000000000000 [ 43.201147][ T22] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 43.210095][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.216701][ T22] CR2: 00000000006cc0a0 CR3: 0000000006e21000 CR4: 00000000001406e0 [ 43.224675][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.232701][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.240697][ T22] Kernel panic - not syncing: Fatal exception [ 43.247477][ T22] Kernel Offset: disabled [ 43.251854][ T22] Rebooting in 86400 seconds..