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-mmots-kasan-gce-7,10.128.0.56' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 41.673406] BUG: unable to handle kernel paging request at ffffc900016f8000 [ 41.680577] IP: snd_seq_oss_readq_puts+0x146/0x210 [ 41.685475] PGD 1dac75067 P4D 1dac75067 PUD 1dac76067 PMD 1d89a5067 PTE 0 [ 41.692376] Oops: 0000 [#1] SMP KASAN [ 41.696145] Dumping ftrace buffer: [ 41.699658] (ftrace buffer empty) [ 41.703334] Modules linked in: [ 41.706495] CPU: 0 PID: 3084 Comm: syzkaller401503 Not tainted 4.13.0-mm1+ #7 [ 41.713743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.723066] task: ffff8801cd0ae3c0 task.stack: ffff8801ce1b8000 [ 41.729094] RIP: 0010:snd_seq_oss_readq_puts+0x146/0x210 [ 41.734507] RSP: 0018:ffff8801ce1bf208 EFLAGS: 00010246 [ 41.739838] RAX: ffffed0039c37e4a RBX: ffffc900016f8000 RCX: ffff8801ce1bf251 [ 41.747078] RDX: 0000000000000000 RSI: 1ffff10039a15d8f RDI: 0000000000000282 [ 41.754317] RBP: ffff8801ce1bf2b8 R08: 0000000000000000 R09: 0000000000000000 [ 41.761554] R10: 0000000000000000 R11: 0000000000000000 R12: 000000003fffffa4 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.768792] R13: ffff8801ce1bf290 R14: ffffc900016f8001 R15: dffffc0000000000 [ 41.776033] FS: 0000000001fff880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 41.784232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.790078] CR2: ffffc900016f8000 CR3: 00000001cea7c000 CR4: 00000000001406f0 [ 41.797317] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.804554] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.811791] Call Trace: [ 41.814349] ? snd_seq_oss_readq_put_event+0x240/0x240 [ 41.819592] ? trace_hardirqs_on+0xd/0x10 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.823710] ? find_slot+0x11d/0x150 [ 41.827393] snd_seq_oss_midi_input+0xd39/0x1040 [ 41.832115] ? do_raw_spin_trylock+0x190/0x190 [ 41.836663] ? snd_seq_oss_midi_get_addr+0x170/0x170 [ 41.841737] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 41.846813] ? snd_seq_oss_process_event+0x2570/0x2570 [ 41.852058] snd_seq_oss_event_input+0x15d/0x220 [ 41.856785] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 41.863073] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 41.868229] ? queueptr+0x79/0xa0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.871646] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 41.876541] ? update_timestamp_of_queue+0x14d/0x200 [ 41.881612] snd_seq_deliver_event+0x318/0x790 [ 41.886166] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 41.892628] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.897614] ? snd_seq_client_use_ptr+0x85/0x330 [ 41.902336] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 41.907669] dummy_input+0x2c4/0x400 [ 41.911350] ? dummy_free+0x20/0x20 [ 41.914946] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 41.919583] ? dummy_free+0x20/0x20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.923176] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 41.929464] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 41.934621] ? snd_seq_client_use_ptr+0x3c/0x330 [ 41.939355] snd_seq_deliver_event+0x12c/0x790 [ 41.943905] ? do_raw_spin_trylock+0x190/0x190 [ 41.948458] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 [ 41.954919] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 41.959993] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.964977] ? trace_hardirqs_on+0xd/0x10 [ 41.969094] ? snd_seq_client_use_ptr+0x85/0x330 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.973818] snd_seq_dispatch_event+0x105/0x5b0 [ 41.978454] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 41.983523] ? snd_seq_kernel_client_dispatch+0x150/0x150 [ 41.989027] ? trace_hardirqs_on+0xd/0x10 [ 41.993146] snd_seq_check_queue.part.3+0x38e/0x510 [ 41.998139] snd_seq_enqueue_event+0x32d/0x3d0 [ 42.002700] ? queueptr+0x79/0xa0 [ 42.006122] snd_seq_client_enqueue_event+0x21b/0x420 [ 42.011279] ? snd_seq_deliver_event+0x790/0x790 [ 42.016002] ? trace_hardirqs_on+0xd/0x10 [ 42.020121] ? snd_seq_client_use_ptr+0x85/0x330 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.024848] kernel_client_enqueue.part.10+0xb5/0xd0 [ 42.029920] snd_seq_kernel_client_enqueue_blocking+0xcf/0x110 [ 42.035863] snd_seq_oss_write+0x5fe/0xa80 [ 42.040067] ? find_held_lock+0x39/0x1d0 [ 42.044100] ? snd_seq_oss_read+0x3e0/0x3e0 [ 42.048387] ? lock_downgrade+0x990/0x990 [ 42.052512] odev_write+0x64/0x90 [ 42.055934] ? odev_poll+0x80/0x80 [ 42.059443] __vfs_write+0xef/0x970 [ 42.063041] ? kernel_read+0x120/0x120 [ 42.066897] ? __might_sleep+0x95/0x190 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.070843] ? __inode_security_revalidate+0xd9/0x130 [ 42.076002] ? avc_policy_seqno+0x9/0x20 [ 42.080038] ? selinux_file_permission+0x82/0x460 [ 42.084850] ? security_file_permission+0x89/0x1f0 [ 42.089749] ? rw_verify_area+0xe5/0x2b0 [ 42.093779] ? __fdget_raw+0x20/0x20 [ 42.097461] vfs_write+0x18f/0x510 [ 42.100972] SyS_write+0xef/0x220 [ 42.104392] ? lockdep_sys_exit+0x47/0xf0 [ 42.108508] ? SyS_read+0x220/0x220 [ 42.112104] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.117089] ? trace_hardirqs_on_thunk+0x1a/0x1c executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.121817] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.126539] RIP: 0033:0x440ab9 [ 42.129696] RSP: 002b:00007ffd7f20ba18 EFLAGS: 00000203 ORIG_RAX: 0000000000000001 [ 42.137371] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000440ab9 [ 42.144607] RDX: 0000000000000150 RSI: 0000000020e7f000 RDI: 0000000000000003 [ 42.151843] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 42.159080] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000000000 [ 42.166320] R13: 0000000000401f40 R14: 0000000000000000 R15: 0000000000000000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.173578] 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 [ 42.192659] RIP: snd_seq_oss_readq_puts+0x146/0x210 RSP: ffff8801ce1bf208 [ 42.199549] CR2: ffffc900016f8000 [ 42.202974] ---[ end trace 734bf60116a2c19d ]--- [ 42.207695] Kernel panic - not syncing: Fatal exception [ 42.213062] Dumping ftrace buffer: [ 42.216573] (ftrace buffer empty) [ 42.220251] Kernel Offset: disabled [ 42.223848] Rebooting in 86400 seconds..