Warning: Permanently added '10.128.0.90' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.571719][ T8569] IPVS: ftp: loaded support on port[0] = 21 [ 63.657112][ T8580] ================================================================== [ 63.665353][ T8580] BUG: KASAN: null-ptr-deref in queue_work_on+0xa6/0x210 [ 63.672371][ T8580] Write of size 8 at addr 0000000000000050 by task syz-executor632/8580 [ 63.680681][ T8580] [ 63.683013][ T8580] CPU: 1 PID: 8580 Comm: syz-executor632 Not tainted 5.3.0-rc4-next-20190816 #67 [ 63.692109][ T8580] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.702152][ T8580] Call Trace: [ 63.705438][ T8580] dump_stack+0x172/0x1f0 [ 63.709765][ T8580] ? queue_work_on+0xa6/0x210 [ 63.714435][ T8580] ? queue_work_on+0xa6/0x210 [ 63.719110][ T8580] __kasan_report.cold+0x5/0x36 [ 63.723954][ T8580] ? queue_work_on+0xa6/0x210 [ 63.728628][ T8580] ? slc_setup+0x260/0x260 [ 63.733059][ T8580] kasan_report+0x12/0x17 [ 63.737386][ T8580] check_memory_region+0x134/0x1a0 [ 63.742487][ T8580] ? slc_setup+0x260/0x260 [ 63.746892][ T8580] __kasan_check_write+0x14/0x20 [ 63.751824][ T8580] queue_work_on+0xa6/0x210 [ 63.756327][ T8580] ? slc_setup+0x260/0x260 [ 63.760742][ T8580] slcan_write_wakeup+0x66/0x90 [ 63.765585][ T8580] ? pty_write_room+0xf0/0xf0 [ 63.770261][ T8580] tty_wakeup+0xe9/0x120 [ 63.774507][ T8580] ? pty_write_room+0xf0/0xf0 [ 63.779179][ T8580] pty_unthrottle+0x37/0x60 [ 63.783688][ T8580] tty_unthrottle+0xab/0x110 [ 63.788278][ T8580] ? n_tty_kick_worker+0x240/0x240 [ 63.793398][ T8580] __tty_perform_flush+0x1b3/0x200 [ 63.798506][ T8580] n_tty_ioctl_helper+0x1cc/0x3b0 [ 63.803531][ T8580] n_tty_ioctl+0x59/0x370 [ 63.807854][ T8580] ? ldsem_down_read+0x33/0x40 [ 63.812618][ T8580] tty_ioctl+0xaf9/0x14f0 [ 63.816942][ T8580] ? n_tty_receive_signal_char+0x120/0x120 [ 63.822746][ T8580] ? do_tty_hangup+0x30/0x30 [ 63.827333][ T8580] ? tomoyo_path_number_perm+0x459/0x520 [ 63.832964][ T8580] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 63.839205][ T8580] ? tomoyo_path_number_perm+0x263/0x520 [ 63.844835][ T8580] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 63.850654][ T8580] ? do_tty_hangup+0x30/0x30 [ 63.855244][ T8580] do_vfs_ioctl+0xdb6/0x13e0 [ 63.859834][ T8580] ? ioctl_preallocate+0x210/0x210 [ 63.864940][ T8580] ? __fget+0x384/0x560 [ 63.869099][ T8580] ? ksys_dup3+0x3e0/0x3e0 [ 63.873517][ T8580] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.879063][ T8580] ? tomoyo_file_ioctl+0x23/0x30 [ 63.883995][ T8580] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.890231][ T8580] ? security_file_ioctl+0x8d/0xc0 [ 63.895345][ T8580] ksys_ioctl+0xab/0xd0 [ 63.899498][ T8580] __x64_sys_ioctl+0x73/0xb0 [ 63.904091][ T8580] do_syscall_64+0xfa/0x760 [ 63.908595][ T8580] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.914484][ T8580] RIP: 0033:0x446b69 [ 63.918374][ T8580] Code: e8 8c 19 03 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 3b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.937968][ T8580] RSP: 002b:00007f2d185efd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 63.946372][ T8580] RAX: ffffffffffffffda RBX: 00000000006dcc58 RCX: 0000000000446b69 [ 63.954334][ T8580] RDX: 0000000000000000 RSI: 000000000000540b RDI: 0000000000000003 [ 63.962295][ T8580] RBP: 00000000006dcc50 R08: 00007f2d185f0700 R09: 0000000000000000 [ 63.970262][ T8580] R10: 00007f2d185f0700 R11: 0000000000000246 R12: 00000000006dcc5c [ 63.978224][ T8580] R13: 00007ffe0e48e94f R14: 00007f2d185f09c0 R15: 0000000000000001 [ 63.986205][ T8580] ================================================================== [ 63.994256][ T8580] Disabling lock debugging due to kernel taint [ 64.000394][ T8580] Kernel panic - not syncing: panic_on_warn set ... [ 64.006973][ T8580] CPU: 1 PID: 8580 Comm: syz-executor632 Tainted: G B 5.3.0-rc4-next-20190816 #67 [ 64.017447][ T8580] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.027489][ T8580] Call Trace: [ 64.030781][ T8580] dump_stack+0x172/0x1f0 [ 64.035117][ T8580] panic+0x2dc/0x755 [ 64.039002][ T8580] ? add_taint.cold+0x16/0x16 [ 64.043690][ T8580] ? queue_work_on+0xa6/0x210 [ 64.048364][ T8580] ? trace_hardirqs_off+0x62/0x240 [ 64.053466][ T8580] ? trace_hardirqs_off+0x59/0x240 [ 64.058564][ T8580] ? queue_work_on+0xa6/0x210 [ 64.063210][ T8580] end_report+0x47/0x4f [ 64.067342][ T8580] ? queue_work_on+0xa6/0x210 [ 64.071988][ T8580] __kasan_report.cold+0xe/0x36 [ 64.076805][ T8580] ? queue_work_on+0xa6/0x210 [ 64.081467][ T8580] ? slc_setup+0x260/0x260 [ 64.085857][ T8580] kasan_report+0x12/0x17 [ 64.090156][ T8580] check_memory_region+0x134/0x1a0 [ 64.095236][ T8580] ? slc_setup+0x260/0x260 [ 64.099623][ T8580] __kasan_check_write+0x14/0x20 [ 64.104530][ T8580] queue_work_on+0xa6/0x210 [ 64.109003][ T8580] ? slc_setup+0x260/0x260 [ 64.113390][ T8580] slcan_write_wakeup+0x66/0x90 [ 64.118214][ T8580] ? pty_write_room+0xf0/0xf0 [ 64.122861][ T8580] tty_wakeup+0xe9/0x120 [ 64.127075][ T8580] ? pty_write_room+0xf0/0xf0 [ 64.131721][ T8580] pty_unthrottle+0x37/0x60 [ 64.136195][ T8580] tty_unthrottle+0xab/0x110 [ 64.140758][ T8580] ? n_tty_kick_worker+0x240/0x240 [ 64.145841][ T8580] __tty_perform_flush+0x1b3/0x200 [ 64.150922][ T8580] n_tty_ioctl_helper+0x1cc/0x3b0 [ 64.155916][ T8580] n_tty_ioctl+0x59/0x370 [ 64.160214][ T8580] ? ldsem_down_read+0x33/0x40 [ 64.164952][ T8580] tty_ioctl+0xaf9/0x14f0 [ 64.169259][ T8580] ? n_tty_receive_signal_char+0x120/0x120 [ 64.175034][ T8580] ? do_tty_hangup+0x30/0x30 [ 64.179597][ T8580] ? tomoyo_path_number_perm+0x459/0x520 [ 64.185208][ T8580] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 64.191423][ T8580] ? tomoyo_path_number_perm+0x263/0x520 [ 64.197026][ T8580] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 64.202809][ T8580] ? do_tty_hangup+0x30/0x30 [ 64.207371][ T8580] do_vfs_ioctl+0xdb6/0x13e0 [ 64.211932][ T8580] ? ioctl_preallocate+0x210/0x210 [ 64.217011][ T8580] ? __fget+0x384/0x560 [ 64.221158][ T8580] ? ksys_dup3+0x3e0/0x3e0 [ 64.225548][ T8580] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.231063][ T8580] ? tomoyo_file_ioctl+0x23/0x30 [ 64.235971][ T8580] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.242191][ T8580] ? security_file_ioctl+0x8d/0xc0 [ 64.247280][ T8580] ksys_ioctl+0xab/0xd0 [ 64.251422][ T8580] __x64_sys_ioctl+0x73/0xb0 [ 64.256011][ T8580] do_syscall_64+0xfa/0x760 [ 64.260508][ T8580] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.266380][ T8580] RIP: 0033:0x446b69 [ 64.270247][ T8580] Code: e8 8c 19 03 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 3b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.289822][ T8580] RSP: 002b:00007f2d185efd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 64.298204][ T8580] RAX: ffffffffffffffda RBX: 00000000006dcc58 RCX: 0000000000446b69 [ 64.306179][ T8580] RDX: 0000000000000000 RSI: 000000000000540b RDI: 0000000000000003 [ 64.314124][ T8580] RBP: 00000000006dcc50 R08: 00007f2d185f0700 R09: 0000000000000000 [ 64.322069][ T8580] R10: 00007f2d185f0700 R11: 0000000000000246 R12: 00000000006dcc5c [ 64.330011][ T8580] R13: 00007ffe0e48e94f R14: 00007f2d185f09c0 R15: 0000000000000001 [ 64.339042][ T8580] Kernel Offset: disabled [ 64.343378][ T8580] Rebooting in 86400 seconds..