[....] 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[ 14.128903][ T1666] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.811426][ T1700] random: sshd: uninitialized urandom read (32 bytes read) [ 18.933655][ T1703] random: sshd: uninitialized urandom read (32 bytes read) [ 19.010839][ C1] random: crng init done Warning: Permanently added '10.128.1.32' (ECDSA) to the list of known hosts. executing program [ 40.200361][ T102] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 40.560447][ T102] usb 1-1: config 0 has an invalid interface number: 132 but max is 0 [ 40.568700][ T102] usb 1-1: config 0 has no interface number 0 [ 40.574845][ T102] usb 1-1: config 0 interface 132 altsetting 0 endpoint 0x84 has an invalid bInterval 0, changing to 7 [ 40.585967][ T102] usb 1-1: config 0 interface 132 altsetting 0 endpoint 0xF has invalid maxpacket 152, setting to 64 [ 40.596842][ T102] usb 1-1: config 0 interface 132 altsetting 0 has an invalid endpoint with address 0x0, skipping [ 40.607457][ T102] usb 1-1: New USB device found, idVendor=2040, idProduct=8265, bcdDevice=83.7c [ 40.616496][ T102] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 40.625693][ T102] usb 1-1: config 0 descriptor?? [ 40.682487][ T102] em28xx 1-1:0.132: New device @ 480 Mbps (2040:8265, interface 132, class 132) [ 40.691827][ T102] em28xx 1-1:0.132: DVB interface 132 found: bulk executing program [ 40.930386][ T102] em28xx 1-1:0.132: unknown em28xx chip ID (0) [ 41.080418][ T102] em28xx 1-1:0.132: reading from i2c device at 0xa0 failed (error=-5) [ 41.088755][ T102] em28xx 1-1:0.132: board has no eeprom [ 41.200371][ T102] em28xx 1-1:0.132: Identified as Hauppauge WinTV-dualHD DVB (card=99) [ 41.208672][ T102] em28xx 1-1:0.132: dvb set to bulk mode. [ 41.340435][ T102] em28xx 1-1:0.132: unknown em28xx chip ID (0) [ 41.500391][ T102] em28xx 1-1:0.132: reading from i2c device at 0xa0 failed (error=-5) [ 41.508612][ T102] em28xx 1-1:0.132: board has no eeprom [ 41.620333][ T102] em28xx 1-1:0.132: Identified as Hauppauge WinTV-dualHD DVB (card=99) [ 41.628738][ T102] em28xx 1-1:0.132: dvb ts2 set to bulk mode. [ 41.871082][ T5] em28xx 1-1:0.132: Binding DVB extension [ 41.880523][ T102] usb 1-1: USB disconnect, device number 2 [ 41.887412][ T102] em28xx 1-1:0.132: Disconnecting em28xx #1 [ 41.893488][ T102] ------------[ cut here ]------------ [ 41.898962][ T102] WARNING: CPU: 0 PID: 102 at kernel/workqueue.c:3031 __flush_work.cold+0x2c/0x36 [ 41.908309][ T102] Kernel panic - not syncing: panic_on_warn set ... [ 41.914877][ T102] CPU: 0 PID: 102 Comm: kworker/0:2 Not tainted 5.3.0-rc5+ #28 [ 41.922520][ T102] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.932562][ T102] Workqueue: usb_hub_wq hub_event [ 41.937562][ T102] Call Trace: [ 41.940846][ T102] dump_stack+0xca/0x13e [ 41.945066][ T102] ? alloc_unbound_pwq.cold+0x30/0x6a [ 41.950424][ T102] panic+0x2a3/0x6da [ 41.954359][ T102] ? add_taint.cold+0x16/0x16 [ 41.959051][ T102] ? __probe_kernel_read+0x188/0x1d0 [ 41.964316][ T102] ? __warn.cold+0x5/0x4a [ 41.968625][ T102] ? __warn+0xe3/0x1e0 [ 41.972712][ T102] ? __flush_work.cold+0x2c/0x36 [ 41.977629][ T102] __warn.cold+0x20/0x4a [ 41.981895][ T102] ? __flush_work.cold+0x2c/0x36 [ 41.986823][ T102] report_bug+0x262/0x2a0 [ 41.991131][ T102] do_error_trap+0x12b/0x1e0 [ 41.995705][ T102] ? __flush_work.cold+0x2c/0x36 [ 42.000617][ T102] do_invalid_op+0x32/0x40 [ 42.005012][ T102] ? __flush_work.cold+0x2c/0x36 [ 42.009930][ T102] invalid_op+0x23/0x30 [ 42.014063][ T102] RIP: 0010:__flush_work.cold+0x2c/0x36 [ 42.019713][ T102] Code: 85 22 00 48 c7 c7 40 e6 c5 85 e8 c9 26 0d 00 0f 0b 45 31 e4 e9 98 86 ff ff e8 51 85 22 00 48 c7 c7 40 e6 c5 85 e8 ae 26 0d 00 <0f> 0b 45 31 e4 e9 7d 86 ff ff e8 36 85 22 00 48 c7 c7 40 e6 c5 85 [ 42.039305][ T102] RSP: 0018:ffff8881d507f720 EFLAGS: 00010286 [ 42.045480][ T102] RAX: 0000000000000024 RBX: dffffc0000000000 RCX: 0000000000000000 [ 42.053433][ T102] RDX: 0000000000000000 RSI: ffffffff81288cfd RDI: ffffed103aa0fed6 [ 42.061437][ T102] RBP: ffff8881d507f888 R08: 0000000000000024 R09: ffffed103b645d58 [ 42.069398][ T102] R10: ffffed103b645d57 R11: ffff8881db22eabf R12: 0000000000000000 [ 42.077436][ T102] R13: 0000000000000001 R14: ffff8881d351ddf8 R15: ffff8881d2b55b78 [ 42.085392][ T102] ? vprintk_func+0x7d/0x113 [ 42.089973][ T102] ? wq_update_unbound_numa+0x710/0x710 [ 42.095507][ T102] ? __dev_printk+0x1db/0x203 [ 42.100162][ T102] ? _dev_info+0xd7/0x109 [ 42.104463][ T102] ? _dev_notice+0x109/0x109 [ 42.109033][ T102] ? lockdep_hardirqs_on+0x379/0x580 [ 42.114317][ T102] ? usb_hcd_flush_endpoint+0x14c/0x2d0 [ 42.119864][ T102] ? usb_disable_endpoint+0x1ba/0x1f0 [ 42.125226][ T102] em28xx_usb_disconnect.cold+0x280/0x2a6 [ 42.130923][ T102] usb_unbind_interface+0x1bd/0x8a0 [ 42.136095][ T102] ? usb_autoresume_device+0x60/0x60 [ 42.141364][ T102] device_release_driver_internal+0x42f/0x500 [ 42.147415][ T102] bus_remove_device+0x2dc/0x4a0 [ 42.152342][ T102] device_del+0x420/0xb10 [ 42.156659][ T102] ? __device_links_no_driver+0x240/0x240 [ 42.162352][ T102] ? usb_remove_ep_devs+0x3e/0x80 [ 42.167440][ T102] ? remove_intf_ep_devs+0x13f/0x1d0 [ 42.172711][ T102] usb_disable_device+0x211/0x690 [ 42.177715][ T102] usb_disconnect+0x284/0x8d0 [ 42.182367][ T102] hub_event+0x1454/0x3640 [ 42.186764][ T102] ? find_held_lock+0x2d/0x110 [ 42.191502][ T102] ? mark_held_locks+0xe0/0xe0 [ 42.196240][ T102] ? hub_port_debounce+0x260/0x260 [ 42.201325][ T102] process_one_work+0x92b/0x1530 [ 42.206248][ T102] ? pwq_dec_nr_in_flight+0x310/0x310 [ 42.211604][ T102] ? do_raw_spin_lock+0x11a/0x280 [ 42.216614][ T102] worker_thread+0x7ab/0xe20 [ 42.221184][ T102] ? process_one_work+0x1530/0x1530 [ 42.226358][ T102] kthread+0x318/0x420 [ 42.230447][ T102] ? kthread_create_on_node+0xf0/0xf0 [ 42.235805][ T102] ret_from_fork+0x24/0x30 [ 42.240845][ T102] Kernel Offset: disabled [ 42.245205][ T102] Rebooting in 86400 seconds..