INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] 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 '10.128.0.96' (ECDSA) to the list of known hosts. syzkaller login: [ 23.726375][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 23.966338][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 24.086413][ T12] usb 1-1: config 0 has an invalid interface number: 247 but max is 0 [ 24.094657][ T12] usb 1-1: config 0 has no interface number 0 [ 24.100952][ T12] usb 1-1: config 0 interface 247 altsetting 0 endpoint 0x9 has wMaxPacketSize 0, skipping [ 24.110991][ T12] usb 1-1: config 0 interface 247 altsetting 0 endpoint 0x8F has wMaxPacketSize 0, skipping [ 24.121098][ T12] usb 1-1: New USB device found, idVendor=10cf, idProduct=5503, bcdDevice=cd.a0 [ 24.130146][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 24.139383][ T12] usb 1-1: config 0 descriptor?? [ 24.190291][ T12] kasan: CONFIG_KASAN_INLINE enabled [ 24.195719][ T12] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.203879][ T12] general protection fault: 0000 [#1] SMP KASAN [ 24.210109][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.5.0-rc2-syzkaller #0 [ 24.218233][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.228313][ T12] Workqueue: usb_hub_wq hub_event [ 24.233318][ T12] RIP: 0010:vmk80xx_write_packet+0x75/0x260 [ 24.239198][ T12] Code: 48 8d 7b 68 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6b 68 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 01 00 00 [ 24.258779][ T12] RSP: 0018:ffff8881da227200 EFLAGS: 00010202 [ 24.264818][ T12] RAX: dffffc0000000000 RBX: ffff8881d3178600 RCX: 0000000000000000 [ 24.272779][ T12] RDX: 0000000000000002 RSI: ffffffff847865c3 RDI: ffff8881d3178668 [ 24.280727][ T12] RBP: ffff8881cf4ce400 R08: ffff8881da211880 R09: 0000000000000010 [ 24.288674][ T12] R10: fffffbfff11f1ebc R11: ffffffff88f8f5e7 R12: ffff8881cf6d9000 [ 24.296621][ T12] R13: 0000000000000010 R14: 0000000000000000 R15: ffff8881cff5c208 [ 24.304582][ T12] FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 24.313507][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.320066][ T12] CR2: 00007f493f110000 CR3: 00000001d05b6000 CR4: 00000000001406f0 [ 24.328015][ T12] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.336115][ T12] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.344118][ T12] Call Trace: [ 24.347398][ T12] vmk80xx_auto_attach+0x13b1/0x17c0 [ 24.352674][ T12] comedi_auto_config+0x16e/0x250 [ 24.357735][ T12] usb_probe_interface+0x305/0x7a0 [ 24.362868][ T12] ? usb_probe_device+0x100/0x100 [ 24.367933][ T12] really_probe+0x281/0x6d0 [ 24.372454][ T12] driver_probe_device+0x104/0x210 [ 24.377546][ T12] __device_attach_driver+0x1c2/0x220 [ 24.382914][ T12] ? driver_allows_async_probing+0x160/0x160 [ 24.388891][ T12] bus_for_each_drv+0x162/0x1e0 [ 24.393738][ T12] ? bus_rescan_devices+0x20/0x20 [ 24.398755][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 24.404560][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 24.409939][ T12] __device_attach+0x217/0x360 [ 24.414701][ T12] ? device_bind_driver+0xd0/0xd0 [ 24.419724][ T12] bus_probe_device+0x1e4/0x290 [ 24.424571][ T12] device_add+0x1480/0x1c20 [ 24.429081][ T12] ? wait_for_completion+0x3c0/0x3c0 [ 24.434345][ T12] ? device_links_flush_sync_list+0x350/0x350 [ 24.440392][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 24.446180][ T12] usb_set_configuration+0xe67/0x1740 [ 24.451533][ T12] generic_probe+0x9d/0xd5 [ 24.455940][ T12] usb_probe_device+0x99/0x100 [ 24.460689][ T12] ? usb_suspend+0x620/0x620 [ 24.465259][ T12] really_probe+0x281/0x6d0 [ 24.469754][ T12] driver_probe_device+0x104/0x210 [ 24.474842][ T12] __device_attach_driver+0x1c2/0x220 [ 24.480194][ T12] ? driver_allows_async_probing+0x160/0x160 [ 24.486149][ T12] bus_for_each_drv+0x162/0x1e0 [ 24.490978][ T12] ? bus_rescan_devices+0x20/0x20 [ 24.495978][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 24.501764][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 24.507025][ T12] __device_attach+0x217/0x360 [ 24.511765][ T12] ? device_bind_driver+0xd0/0xd0 [ 24.516768][ T12] bus_probe_device+0x1e4/0x290 [ 24.521606][ T12] device_add+0x1480/0x1c20 [ 24.526085][ T12] ? device_links_flush_sync_list+0x350/0x350 [ 24.532139][ T12] usb_new_device.cold+0x6a4/0xe79 [ 24.537229][ T12] hub_event+0x1e59/0x3860 [ 24.541637][ T12] ? hub_port_debounce+0x260/0x260 [ 24.546728][ T12] ? find_held_lock+0x2d/0x110 [ 24.551471][ T12] ? mark_held_locks+0xe0/0xe0 [ 24.556222][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 24.561746][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 24.567010][ T12] process_one_work+0x92b/0x1530 [ 24.571925][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 24.577288][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 24.582293][ T12] worker_thread+0x96/0xe20 [ 24.586777][ T12] ? process_one_work+0x1530/0x1530 [ 2