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 '10.128.0.202' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.206059][ T78] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 26.445980][ T78] usb 1-1: Using ep0 maxpacket: 16 [ 26.566105][ T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 26.577165][ T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has wMaxPacketSize 0, skipping [ 26.587464][ T78] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 26.600316][ T78] usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.00 [ 26.609543][ T78] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 26.619254][ T78] usb 1-1: config 0 descriptor?? [ 26.636168][ T1717] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 26.966070][ T78] usbhid 1-1:0.0: can't add hid device: -71 [ 26.972128][ T78] usbhid: probe of 1-1:0.0 failed with error -71 [ 26.979895][ T78] usb 1-1: USB disconnect, device number 2 [ 27.436016][ T78] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 27.676512][ T78] usb 1-1: Using ep0 maxpacket: 16 [ 27.796145][ T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 27.807215][ T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has wMaxPacketSize 0, skipping [ 27.817357][ T78] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 27.830202][ T78] usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.00 [ 27.839393][ T78] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 27.848668][ T78] usb 1-1: config 0 descriptor?? [ 27.866096][ T1717] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 28.328007][ T78] microsoft 0003:045E:07DA.0001: ignoring exceeding usage max [ 28.339217][ T78] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 28.350526][ T78] input: HID 045e:07da as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.0/0003:045E:07DA.0001/input/input5 [ 28.429383][ T78] microsoft 0003:045E:07DA.0001: input,hidraw0: USB HID v0.00 Device [HID 045e:07da] on usb-dummy_hcd.0-1/input0 [ 28.538468][ T1717] ================================================================== [ 28.546781][ T1717] BUG: KASAN: slab-out-of-bounds in sysrq_filter+0x8ff/0xeb0 [ 28.554134][ T1717] Write of size 8 at addr ffff8881cff93dc8 by task syz-executor237/1717 [ 28.562548][ T1717] [ 28.564865][ T1717] CPU: 1 PID: 1717 Comm: syz-executor237 Not tainted 5.4.0-syzkaller #0 [ 28.573176][ T1717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.583590][ T1717] Call Trace: [ 28.586877][ T1717] dump_stack+0xef/0x16e [ 28.591099][ T1717] ? sysrq_filter+0x8ff/0xeb0 [ 28.595767][ T1717] ? sysrq_filter+0x8ff/0xeb0 [ 28.600424][ T1717] print_address_description.constprop.0+0x36/0x50 [ 28.606903][ T1717] ? sysrq_filter+0x8ff/0xeb0 [ 28.611556][ T1717] ? sysrq_filter+0x8ff/0xeb0 [ 28.616235][ T1717] __kasan_report.cold+0x1a/0x33 [ 28.621174][ T1717] ? sysrq_filter+0x8ff/0xeb0 [ 28.625851][ T1717] kasan_report+0xe/0x20 [ 28.630077][ T1717] check_memory_region+0x128/0x190 [ 28.635181][ T1717] sysrq_filter+0x8ff/0xeb0 [ 28.639675][ T1717] ? handle_sysrq+0x50/0x50 [ 28.644156][ T1717] input_to_handler+0x152/0x4c0 [ 28.648985][ T1717] input_pass_values.part.0+0x2de/0x710 [ 28.654540][ T1717] ? hidinput_setkeycode+0x2b3/0x390 [ 28.659806][ T1717] input_set_keycode+0x290/0x320 [ 28.664754][ T1717] ? input_repeat_key+0x2c0/0x2c0 [ 28.669770][ T1717] ? __might_fault+0x190/0x1d0 [ 28.674627][ T1717] evdev_handle_set_keycode_v2+0xc4/0x120 [ 28.681797][ T1717] ? evdev_handle_set_keycode+0x170/0x170 [ 28.687663][ T1717] evdev_ioctl_handler+0xd49/0x19f0 [ 28.692853][ T1717] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.698916][ T1717] ? str_to_user+0x90/0x90 [ 28.703325][ T1717] ? find_held_lock+0x2d/0x110 [ 28.708066][ T1717] ? debug_check_no_obj_freed+0x20f/0x443 [ 28.713757][ T1717] ? lock_downgrade+0x6e0/0x6e0 [ 28.718619][ T1717] ? lock_acquire+0x127/0x320 [ 28.723292][ T1717] ? debug_check_no_obj_freed+0xc4/0x443 [ 28.729080][ T1717] ? evdev_ioctl_compat+0x30/0x30 [ 28.734213][ T1717] do_vfs_ioctl+0xd2d/0x1330 [ 28.738861][ T1717] ? putname+0xe1/0x120 [ 28.743061][ T1717] ? putname+0xe1/0x120 [ 28.747236][ T1717] ? compat_ioctl_preallocate+0x200/0x200 [ 28.752959][ T1717] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 28.758238][ T1717] ? __kasan_slab_free+0x145/0x180 [ 28.763333][ T1717] ? kmem_cache_free+0x2e1/0x370 [ 28.768247][ T1717] ? putname+0xe1/0x120 [ 28.772391][ T1717] ? do_sys_open+0x2e7/0x580 [ 28.776970][ T1717] ? filp_open+0x70/0x70 [ 28.782337][ T1717] ksys_ioctl+0x9b/0xc0 [ 28.787605][ T1717] __x64_sys_ioctl+0x6f/0xb0 [ 28.792234][ T1717] ? lockdep_hardirqs_on+0x382/0x580 [ 28.797500][ T1717] do_syscall_64+0xb7/0x5b0 [ 28.802679][ T1717] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.808567][ T1717] RIP: 0033:0x444dc9 [ 28.812454][ T1717] Code: e8 bc af 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 28.832036][ T1717] RSP: 002b:00007ffea62b3f68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 28.840427][ T1717] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444dc9 [ 28.848436][ T1717] RDX: 00000000200000c0 RSI: 0000000040284504 RDI: 0000000000000004 [ 28.856435][ T1717] RBP: 00000000006cf018 R08: 7d03000000008300 R09: 00000000004002e0 [ 28.864511][ T1717] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000402a70 [ 28.872472][ T1717] R13: 0000000000402b00 R14: 0000000000000000 R15: 0000000000000000 [ 28.881797][ T1717] [ 28.884526][ T1717] Allocated by task 78: [ 28.888688][ T1717] save_stack+0x1b/0x80 [ 28.892842][ T1717] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 28.898459][ T1717] sysrq_connect+0x46/0x290 [ 28.902957][ T1717] input_attach_handler+0x194/0x200 [ 28.908137][ T1717] input_register_device.cold+0xf5/0x246 [ 28.913751][ T1717] hidinput_connect+0x4f8d/0xdb90 [ 28.918754][ T1717] hid_connect+0x965/0xbb0 [ 28.923146][ T1717] hid_hw_start+0xa2/0x130 [ 28.927539][ T1717] ms_probe+0x159/0x4d0 [ 28.931669][ T1717] hid_device_probe+0x2be/0x3f0 [ 28.936494][ T1717] really_probe+0x281/0x6d0 [ 28.940973][ T1717] driver_probe_device+0x104/0x210 [ 28.946059][ T1717] __device_attach_driver+0x1c2/0x220 [ 28.951418][ T1717] bus_for_each_drv+0x162/0x1e0 [ 28.956241][ T1717] __device_attach+0x217/0x360 [ 28.960979][ T1717] bus_probe_device+0x1e4/0x290 [ 28.965817][ T1717] device_add+0x1480/0x1c20 [ 28.970296][ T1717] hid_add_device+0x33c/0x9a0 [ 28.974968][ T1717] usbhid_probe+0xa81/0xfa0 [ 28.979571][ T1717] usb_probe_interface+0x305/0x7a0 [ 28.984836][ T1717] really_probe+0x281/0x6d0 [ 28.989323][ T1717] driver_probe_device+0x104/0x210 [ 28.994457][ T1717] __device_attach_driver+0x1c2/0x220 [ 28.999827][ T1717] bus_for_each_drv+0x162/0x1e0 [ 29.004666][ T1717] __device_attach+0x217/0x360 [ 29.009431][ T1717] bus_probe_device+0x1e4/0x290 [ 29.014268][ T1717] device_add+0x1480/0x1c20 [ 29.018754][ T1717] usb_set_configuration+0xe67/0x1740 [ 29.024103][ T1717] generic_probe+0x9d/0xd5 [ 29.028523][ T1717] usb_probe_device+0x99/0x100 [ 29.033262][ T1717] really_probe+0x281/0x6d0 [ 29.037739][ T1717] driver_probe_device+0x104/0x210 [ 29.042824][ T1717] __device_attach_driver+0x1c2/0x220 [ 29.048196][ T1717] bus_for_each_drv+0x162/0x1e0 [ 29.053095][ T1717] __device_attach+0x217/0x360 [ 29.057978][ T1717] bus_probe_device+0x1e4/0x290 [ 29.062812][ T1717] device_add+0x1480/0x1c20 [ 29.067298][ T1717] usb_new_device.cold+0x6a4/0xe79 [ 29.072399][ T1717] hub_event+0x1e59/0x3860 [ 29.076791][ T1717] process_one_work+0x92b/0x1530 [ 29.083044][ T1717] worker_thread+0x7ab/0xe20 [ 29.087649][ T1717] kthread+0x318/0x420 [ 29.091700][ T1717] ret_from_fork+0x24/0x30 [ 29.096089][ T1717] [ 29.098394][ T1717] Freed by task 350: [ 29.102271][ T1717] save_stack+0x1b/0x80 [ 29.106403][ T1717] __kasan_slab_free+0x130/0x180 [ 29.111323][ T1717] kfree+0xdc/0x310 [ 29.115135][ T1717] load_elf_binary+0x2435/0x4f00 [ 29.120060][ T1717] search_binary_handler+0x16b/0x580 [ 29.125343][ T1717] __do_execve_file.isra.0+0x1304/0x21e0 [ 29.130950][ T1717] __x64_sys_execve+0x8a/0xb0 [ 29.135603][ T1717] do_syscall_64+0xb7/0x5b0 [ 29.140105][ T1717] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.145981][ T1717] [ 29.148291][ T1717] The buggy address belongs to the object at ffff8881cff93c00 [ 29.148291][ T1717] which belongs to the cache kmalloc-512 of size 512 [ 29.162332][ T1717] The buggy address is located 456 bytes inside of [ 29.162332][ T1717] 512-byte region [ffff8881cff93c00, ffff8881cff93e00) [ 29.175583][ T1717] The buggy address belongs to the page: [ 29.182848][ T1717] page:ffffea00073fe400 refcount:1 mapcount:0 mapping:ffff8881da402500 index:0x0 compound_mapcount: 0 [ 29.193959][ T1717] raw: 0200000000010200 0000000000000000 0000000100000001 ffff8881da402500 [ 29.202549][ T1717] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 29.211118][ T1717] page dumped because: kasan: bad access detected [ 29.217507][ T1717] [ 29.219809][ T1717] Memory state around the buggy address: [ 29.225428][ T1717] ffff8881cff93c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.233482][ T1717] ffff8881cff93d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.241520][ T1717] >ffff8881cff93d80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 29.249582][ T1717] ^ [ 29.256016][ T1717] ffff8881cff93e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.264306][ T1717] ffff8881cff93e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.272375][ T1717] ================================================================== [ 29.281630][ T1717] Disabling lock debugging due to kernel taint [ 29.287908][ T1717] Kernel panic - not syncing: panic_on_warn set ... [ 29.294482][ T1717] CPU: 1 PID: 1717 Comm: syz-executor237 Tainted: G B 5.4.0-syzkaller #0 [ 29.304171][ T1717] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.314340][ T1717] Call Trace: [ 29.317626][ T1717] dump_stack+0xef/0x16e [ 29.321848][ T1717] panic+0x2aa/0x6e1 [ 29.325721][ T1717] ? add_taint.cold+0x16/0x16 [ 29.330378][ T1717] ? print_shadow_for_address+0xb8/0x114 [ 29.335996][ T1717] ? trace_hardirqs_off+0x50/0x1d0 [ 29.341081][ T1717] ? sysrq_filter+0x8ff/0xeb0 [ 29.345730][ T1717] end_report+0x43/0x49 [ 29.349870][ T1717] ? sysrq_filter+0x8ff/0xeb0 [ 29.354538][ T1717] __kasan_report.cold+0xd/0x33 [ 29.359359][ T1717] ? sysrq_filter+0x8ff/0xeb0 [ 29.364022][ T1717] kasan_report+0xe/0x20 [ 29.368252][ T1717] check_memory_region+0x128/0x190 [ 29.373337][ T1717] sysrq_filter+0x8ff/0xeb0 [ 29.377822][ T1717] ? handle_sysrq+0x50/0x50 [ 29.382332][ T1717] input_to_handler+0x152/0x4c0 [ 29.387291][ T1717] input_pass_values.part.0+0x2de/0x710 [ 29.392837][ T1717] ? hidinput_setkeycode+0x2b3/0x390 [ 29.398112][ T1717] input_set_keycode+0x290/0x320 [ 29.403022][ T1717] ? input_repeat_key+0x2c0/0x2c0 [ 29.408038][ T1717] ? __might_fault+0x190/0x1d0 [ 29.412791][ T1717] evdev_handle_set_keycode_v2+0xc4/0x120 [ 29.418494][ T1717] ? evdev_handle_set_keycode+0x170/0x170 [ 29.424197][ T1717] evdev_ioctl_handler+0xd49/0x19f0 [ 29.429383][ T1717] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.435434][ T1717] ? str_to_user+0x90/0x90 [ 29.439829][ T1717] ? find_held_lock+0x2d/0x110 [ 29.444567][ T1717] ? debug_check_no_obj_freed+0x20f/0x443 [ 29.450260][ T1717] ? lock_downgrade+0x6e0/0x6e0 [ 29.455081][ T1717] ? lock_acquire+0x127/0x320 [ 29.459737][ T1717] ? debug_check_no_obj_freed+0xc4/0x443 [ 29.465344][ T1717] ? evdev_ioctl_compat+0x30/0x30 [ 29.470344][ T1717] do_vfs_ioctl+0xd2d/0x1330 [ 29.474907][ T1717] ? putname+0xe1/0x120 [ 29.479079][ T1717] ? putname+0xe1/0x120 [ 29.483504][ T1717] ? compat_ioctl_preallocate+0x200/0x200 [ 29.489213][ T1717] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 29.494482][ T1717] ? __kasan_slab_free+0x145/0x180 [ 29.499624][ T1717] ? kmem_cache_free+0x2e1/0x370 [ 29.504625][ T1717] ? putname+0xe1/0x120 [ 29.508758][ T1717] ? do_sys_open+0x2e7/0x580 [ 29.513323][ T1717] ? filp_open+0x70/0x70 [ 29.517540][ T1717] ksys_ioctl+0x9b/0xc0 [ 29.521670][ T1717] __x64_sys_ioctl+0x6f/0xb0 [ 29.526248][ T1717] ? lockdep_hardirqs_on+0x382/0x580 [ 29.531505][ T1717] do_syscall_64+0xb7/0x5b0 [ 29.536000][ T1717] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.541865][ T1717] RIP: 0033:0x444dc9 [ 29.545740][ T1717] Code: e8 bc af 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 29.565342][ T1717] RSP: 002b:00007ffea62b3f68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 29.573728][ T1717] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444dc9 [ 29.581692][ T1717] RDX: 00000000200000c0 RSI: 0000000040284504 RDI: 0000000000000004 [ 29.589641][ T1717] RBP: 00000000006cf018 R08: 7d03000000008300 R09: 00000000004002e0 [ 29.597587][ T1717] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000402a70 [ 29.605571][ T1717] R13: 0000000000402b00 R14: 0000000000000000 R15: 0000000000000000 [ 29.614404][ T1717] Kernel Offset: disabled [ 29.618723][ T1717] Rebooting in 86400 seconds..