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 'ci-upstream-kasan-gce-3,10.128.15.198' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 30.276820] BUG: unable to handle kernel paging request at ffffc90001700000 [ 30.283966] IP: snd_seq_oss_readq_puts+0x146/0x210 [ 30.288864] PGD 1dac75067 P4D 1dac75067 PUD 1dac76067 PMD 1d8281067 PTE 0 [ 30.295769] Oops: 0000 [#1] SMP KASAN [ 30.299552] Dumping ftrace buffer: [ 30.303058] (ftrace buffer empty) [ 30.306739] Modules linked in: [ 30.309901] CPU: 1 PID: 2989 Comm: syzkaller422795 Not tainted 4.14.0-rc1+ #89 [ 30.317240] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.326564] task: ffff8801cf030580 task.stack: ffff8801ce4e0000 [ 30.332595] RIP: 0010:snd_seq_oss_readq_puts+0x146/0x210 [ 30.338009] RSP: 0018:ffff8801ce4e7208 EFLAGS: 00010246 [ 30.343352] RAX: ffffed0039c9ce4a RBX: ffffc90001700000 RCX: ffff8801ce4e7251 [ 30.350590] RDX: 0000000000000000 RSI: 1ffff10039e061c7 RDI: 0000000000000282 [ 30.357830] RBP: ffff8801ce4e72b8 R08: ffff8801d86e7950 R09: 0000000000000000 [ 30.365081] R10: 0000000000000000 R11: 0000000000000000 R12: 000000003fffffa4 [ 30.372319] R13: ffff8801ce4e7290 R14: ffffc90001700001 R15: dffffc0000000000 [ 30.379557] FS: 00007fb5d9018700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 30.387750] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.393599] CR2: ffffc90001700000 CR3: 00000001cf4dc000 CR4: 00000000001406e0 [ 30.400839] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.408077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.415327] Call Trace: [ 30.417892] ? snd_seq_oss_readq_put_event+0x240/0x240 [ 30.423136] ? trace_hardirqs_on+0xd/0x10 [ 30.427253] ? find_slot+0x11d/0x150 [ 30.430934] snd_seq_oss_midi_input+0xd39/0x1040 [ 30.435659] ? do_raw_spin_trylock+0x190/0x190 [ 30.440212] ? snd_seq_oss_midi_get_addr+0x170/0x170 [ 30.445285] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 30.450359] ? snd_seq_oss_process_event+0x2570/0x2570 [ 30.455609] snd_seq_oss_event_input+0x15d/0x220 [ 30.460356] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 30.466648] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 30.471807] ? queueptr+0x79/0xa0 [ 30.475227] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 30.480124] ? update_timestamp_of_queue+0x14d/0x200 [ 30.485195] snd_seq_deliver_event+0x318/0x790 [ 30.489746] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 30.496229] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.501238] ? snd_seq_client_use_ptr+0x85/0x330 [ 30.505966] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 30.511313] dummy_input+0x2c4/0x400 [ 30.514997] ? dummy_free+0x20/0x20 [ 30.518620] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 30.523267] ? dummy_free+0x20/0x20 [ 30.526862] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 30.533161] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 30.538320] ? snd_seq_client_use_ptr+0x3c/0x330 [ 30.543046] snd_seq_deliver_event+0x12c/0x790 [ 30.547595] ? do_raw_spin_trylock+0x190/0x190 [ 30.552151] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 30.558612] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 30.563694] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.568689] ? trace_hardirqs_on+0xd/0x10 [ 30.572809] ? snd_seq_client_use_ptr+0x85/0x330 [ 30.577534] snd_seq_dispatch_event+0x105/0x5b0 [ 30.582172] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 30.587253] ? snd_seq_kernel_client_dispatch+0x150/0x150 [ 30.592758] ? trace_hardirqs_on+0xd/0x10 [ 30.596875] snd_seq_check_queue.part.3+0x38e/0x510 [ 30.601864] snd_seq_enqueue_event+0x32d/0x3d0 [ 30.606412] ? queueptr+0x79/0xa0 [ 30.609838] snd_seq_client_enqueue_event+0x21b/0x420 [ 30.615009] ? snd_seq_deliver_event+0x790/0x790 [ 30.619730] ? trace_hardirqs_on+0xd/0x10 [ 30.623850] ? snd_seq_client_use_ptr+0x85/0x330 [ 30.628570] kernel_client_enqueue.part.10+0xb5/0xd0 [ 30.633642] snd_seq_kernel_client_enqueue_blocking+0xcf/0x110 [ 30.639592] snd_seq_oss_write+0x5fe/0xa80 [ 30.643794] ? __fget+0x362/0x580 [ 30.647219] ? snd_seq_oss_read+0x3e0/0x3e0 [ 30.651517] odev_write+0x64/0x90 [ 30.654937] ? odev_poll+0x80/0x80 [ 30.658445] __vfs_write+0xef/0x970 [ 30.662040] ? kernel_read+0x120/0x120 [ 30.665895] ? __might_sleep+0x95/0x190 [ 30.669928] ? __inode_security_revalidate+0xd9/0x130 [ 30.675083] ? avc_policy_seqno+0x9/0x20 [ 30.679111] ? selinux_file_permission+0x82/0x460 [ 30.683933] ? security_file_permission+0x89/0x1f0 [ 30.688857] ? rw_verify_area+0xe5/0x2b0 [ 30.692885] ? __fdget_raw+0x20/0x20 [ 30.696568] vfs_write+0x18f/0x510 [ 30.700077] SyS_write+0xef/0x220 [ 30.703497] ? lockdep_sys_exit+0x47/0xf0 [ 30.707611] ? SyS_read+0x220/0x220 [ 30.711206] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.716190] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.720918] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 30.725638] RIP: 0033:0x445dd9 [ 30.728796] RSP: 002b:00007fb5d9017dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 30.736470] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445dd9 [ 30.743705] RDX: 0000000000000150 RSI: 0000000020e7f000 RDI: 0000000000000003 [ 30.750942] RBP: 0000000000000082 R08: 00007fb5d9018700 R09: 00007fb5d9018700 [ 30.758179] R10: 00007fb5d9018700 R11: 0000000000000246 R12: 0000000000000000 [ 30.765415] R13: 00007ffdb90e225f R14: 00007fb5d90189c0 R15: 0000000000000000 [ 30.772668] Code: d9 4c 8d 73 01 48 c1 e8 03 83 e1 07 42 0f b6 04 38 38 c8 7f 08 84 c0 0f 85 bf 00 00 00 48 8b 85 58 ff ff ff 48 8b 8d 68 ff ff ff <41> 0f b6 5e ff 0f b6 00 83 e1 07 38 c8 7f 08 84 c0 0f 85 89 00 [ 30.791737] RIP: snd_seq_oss_readq_puts+0x146/0x210 RSP: ffff8801ce4e7208 [ 30.798637] CR2: ffffc90001700000 [ 30.802061] ---[ end trace 75676146ffa4af48 ]--- [ 30.806781] Kernel panic - not syncing: Fatal exception [ 30.812140] Dumping ftrace buffer: [ 30.815649] (ftrace buffer empty) [ 30.819328] Kernel Offset: disabled [ 30.822933] Rebooting in 86400 seconds..