Warning: Permanently added '10.128.1.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 456.853473] audit: type=1400 audit(1598646290.047:8): avc: denied { execmem } for pid=6466 comm="syz-executor462" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 617.380422] INFO: task syz-executor462:6467 blocked for more than 140 seconds. [ 617.387951] Not tainted 4.19.142-syzkaller #0 [ 617.393924] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 617.402660] syz-executor462 D27216 6467 6460 0x00000004 [ 617.408281] Call Trace: [ 617.410991] __schedule+0x887/0x2040 [ 617.414717] ? io_schedule_timeout+0x140/0x140 [ 617.419336] ? usb_hcd_link_urb_to_ep+0x2bc/0x380 [ 617.424247] ? mark_held_locks+0xf0/0xf0 [ 617.428318] ? usb_hcd_submit_urb+0x1327/0x21d0 [ 617.433073] schedule+0x8d/0x1b0 [ 617.436457] schedule_timeout+0x92d/0xfe0 [ 617.440652] ? do_raw_spin_unlock+0x171/0x230 [ 617.445154] ? usleep_range+0x170/0x170 [ 617.449123] ? wait_for_common+0x294/0x470 [ 617.453422] ? lock_downgrade+0x720/0x720 [ 617.457574] ? lock_acquire+0x170/0x3c0 [ 617.461605] ? wait_for_common+0x9e/0x470 [ 617.465818] ? _raw_spin_unlock_irq+0x24/0x80 [ 617.470373] wait_for_common+0x29c/0x470 [ 617.474465] ? finish_task_switch+0x118/0x780 [ 617.478992] ? bit_wait_io_timeout+0x100/0x100 [ 617.483804] ? mark_held_locks+0xf0/0xf0 [ 617.487879] ? wake_up_q+0xe0/0xe0 [ 617.491481] ? usb_submit_urb+0xb37/0x1300 [ 617.495745] usb_start_wait_urb+0x14b/0x2b0 [ 617.500055] ? usb_api_blocking_completion+0xa0/0xa0 [ 617.505228] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 617.510322] ? memset+0x20/0x40 [ 617.513597] usb_bulk_msg+0x226/0x550 [ 617.517460] proc_bulk+0x3de/0x860 [ 617.521091] ? proc_control+0x7f0/0x7f0 [ 617.525077] ? lock_downgrade+0x720/0x720 [ 617.529209] ? lock_acquire+0x170/0x3c0 [ 617.533941] usbdev_do_ioctl+0x696/0x3030 [ 617.538099] ? futex_wake+0x159/0x480 [ 617.541961] ? proc_bulk+0x860/0x860 [ 617.545689] ? __lock_acquire+0x6de/0x3ff0 [ 617.549931] ? do_futex+0x163/0x1c40 [ 617.553712] ? mark_held_locks+0xf0/0xf0 [ 617.557779] ? set_next_entity+0xb52/0x1dc0 [ 617.562147] ? pick_next_entity+0x27e/0x580 [ 617.566479] ? exit_robust_list+0x2e0/0x2e0 [ 617.573993] ? usbdev_compat_ioctl+0x30/0x30 [ 617.578420] usbdev_ioctl+0x21/0x30 [ 617.582129] do_vfs_ioctl+0xcdb/0x12e0 [ 617.586190] ? selinux_file_ioctl+0x506/0x6c0 [ 617.590754] ? ioctl_preallocate+0x200/0x200 [ 617.595184] ? selinux_inode_link+0x20/0x20 [ 617.599506] ? __fget+0x356/0x510 [ 617.603032] ? do_dup2+0x450/0x450 [ 617.606589] ? __se_sys_futex+0x298/0x3b0 [ 617.610789] ksys_ioctl+0x9b/0xc0 [ 617.614263] __x64_sys_ioctl+0x6f/0xb0 [ 617.618140] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 617.622894] do_syscall_64+0xf9/0x620 [ 617.626705] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 617.631934] RIP: 0033:0x449649 [ 617.635152] Code: Bad RIP value. [ 617.638514] RSP: 002b:00007f3602614db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 617.646276] RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 0000000000449649 [ 617.654234] RDX: 0000000020000000 RSI: 00000000c0185502 RDI: 0000000000000003 [ 617.662101] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 617.669374] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac2c [ 617.676701] R13: 00007ffd438676bf R14: 00007f36026159c0 R15: 20c49ba5e353f7cf [ 617.684164] [ 617.684164] Showing all locks held in the system: [ 617.690691] 1 lock held by khungtaskd/1090: [ 617.695003] #0: 00000000686d2974 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 617.703676] [ 617.705303] ============================================= [ 617.705303] [ 617.712380] NMI backtrace for cpu 0 [ 617.716007] CPU: 0 PID: 1090 Comm: khungtaskd Not tainted 4.19.142-syzkaller #0 [ 617.723448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.732785] Call Trace: [ 617.735434] dump_stack+0x1fc/0x2fe [ 617.739048] nmi_cpu_backtrace.cold+0x63/0xa2 [ 617.743532] ? lapic_can_unplug_cpu.cold+0x39/0x39 [ 617.748458] nmi_trigger_cpumask_backtrace+0x1a6/0x1eb [ 617.753727] watchdog+0x991/0xe60 [ 617.757162] ? reset_hung_task_detector+0x30/0x30 [ 617.762004] kthread+0x33f/0x460 [ 617.765372] ? kthread_park+0x180/0x180 [ 617.769517] ret_from_fork+0x24/0x30 [ 617.773316] Sending NMI from CPU 0 to CPUs 1: [ 617.778043] NMI backtrace for cpu 1 [ 617.778050] CPU: 1 PID: 3702 Comm: systemd-journal Not tainted 4.19.142-syzkaller #0 [ 617.778056] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.778060] RIP: 0010:__ia32_sys_getpid+0x0/0x20 [ 617.778071] Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 0a 48 8b 7b 28 5b e9 42 fc ff ff e8 7d ee 5c 00 eb ef 90 66 2e 0f 1f 84 00 00 00 00 00 8b cd 26 00 31 d2 be 01 00 00 00 65 48 8b 3c 25 40 ee 01 00 e8 [ 617.778076] RSP: 0018:ffff888094397f20 EFLAGS: 00000246 [ 617.778084] RAX: dffffc0000000000 RBX: 0000000000000027 RCX: ffffffff810098b1 [ 617.778089] RDX: 1ffffffff0f008f7 RSI: ffffffff810098bf RDI: ffff888094397f58 [ 617.778095] RBP: ffff888094397f58 R08: 0000000000000000 R09: 0000000000000223 [ 617.778100] R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000100 [ 617.778106] R13: ffffffff88d25b58 R14: 0000000000000000 R15: 0000000000000000 [ 617.778112] FS: 00007ff89f1278c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 617.778116] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 617.778122] CR2: 00007ff89c4d1000 CR3: 0000000094245000 CR4: 00000000001406e0 [ 617.778127] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 617.778133] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 617.778136] Call Trace: [ 617.778140] do_syscall_64+0xf9/0x620 [ 617.778144] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 617.778148] RIP: 0033:0x7ff89e3c0f17 [ 617.778159] Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 [ 617.778163] RSP: 002b:00007ffcde686a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000027 [ 617.778173] RAX: ffffffffffffffda RBX: 0000557b0d871200 RCX: 00007ff89e3c0f17 [ 617.778178] RDX: 0000000000000000 RSI: 00007ffcde686b50 RDI: 0000557b0d871200 [ 617.778184] RBP: 00007ffcde686b50 R08: 8950659ed57cbdeb R09: 0000000000000010 [ 617.778189] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000e76 [ 617.778194] R13: 00007ffcde686af8 R14: 00007ffcde686b50 R15: 00007ffcde6870e8 [ 617.778829] Kernel panic - not syncing: hung_task: blocked tasks [ 617.985112] CPU: 0 PID: 1090 Comm: khungtaskd Not tainted 4.19.142-syzkaller #0 [ 617.992553] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 618.001913] Call Trace: [ 618.004508] dump_stack+0x1fc/0x2fe [ 618.008134] panic+0x26a/0x50e [ 618.011334] ? __warn_printk+0xf3/0xf3 [ 618.015205] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 618.020302] ? cpumask_next+0x3c/0x40 [ 618.024107] ? printk_safe_flush+0xd6/0x120 [ 618.028421] ? watchdog+0x991/0xe60 [ 618.032136] ? nmi_trigger_cpumask_backtrace+0x15e/0x1eb [ 618.037583] watchdog+0x9a2/0xe60 [ 618.041033] ? reset_hung_task_detector+0x30/0x30 [ 618.045879] kthread+0x33f/0x460 [ 618.049225] ? kthread_park+0x180/0x180 [ 618.053197] ret_from_fork+0x24/0x30 [ 618.058274] Kernel Offset: disabled [ 618.061910] Rebooting in 86400 seconds..