INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.348849][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 25.588813][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 25.708929][ T12] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 25.720098][ T12] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 25.733208][ T12] usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.00 [ 25.742277][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 25.751646][ T12] usb 1-1: config 0 descriptor?? [ 26.231092][ T12] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 26.238444][ T12] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 26.249543][ T12] input: HID 045e:07da as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.0/0003:045E:07DA.0001/input/input5 [ 26.331726][ T12] microsoft 0003:045E:07DA.0001: input,hidraw0: USB HID v0.00 Device [HID 045e:07da] on usb-dummy_hcd.0-1/input0 [ 26.459910][ C0] ================================================================== [ 26.468100][ C0] BUG: KASAN: use-after-free in hidinput_hid_event+0x1111/0x15d3 [ 26.475951][ C0] Read of size 8 at addr ffff8881cfb19738 by task swapper/0/0 [ 26.483386][ C0] [ 26.485705][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc2-syzkaller #0 [ 26.493586][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.503686][ C0] Call Trace: [ 26.506958][ C0] <IRQ> [ 26.509800][ C0] dump_stack+0xef/0x16e [ 26.514047][ C0] ? hidinput_hid_event+0x1111/0x15d3 [ 26.519448][ C0] ? hidinput_hid_event+0x1111/0x15d3 [ 26.524854][ C0] print_address_description.constprop.0+0x16/0x200 [ 26.531515][ C0] ? hidinput_hid_event+0x1111/0x15d3 [ 26.536868][ C0] ? hidinput_hid_event+0x1111/0x15d3 [ 26.542222][ C0] __kasan_report.cold+0x37/0x7f [ 26.547299][ C0] ? hidinput_hid_event+0x1111/0x15d3 [ 26.552661][ C0] kasan_report+0xe/0x20 [ 26.556887][ C0] check_memory_region+0x152/0x1c0 [ 26.561984][ C0] hidinput_hid_event+0x1111/0x15d3 [ 26.567209][ C0] hid_process_event+0x4a0/0x580 [ 26.572134][ C0] ? hid_field_extract+0xe4/0x170 [ 26.577276][ C0] ? mf_play.cold+0x99/0x99 [ 26.581853][ C0] ? kmalloc_order_trace+0xe4/0x110 [ 26.587038][ C0] hid_report_raw_event+0xabb/0xed0 [ 26.592220][ C0] hid_input_report+0x315/0x3f0 [ 26.597058][ C0] ? ktime_get_mono_fast_ns+0x163/0x1f0 [ 26.602586][ C0] hid_irq_in+0x50e/0x690 [ 26.606994][ C0] __usb_hcd_giveback