executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 23.683729] BUG: unable to handle kernel paging request at ffffc90000b4d000 executing program executing program executing program executing program [ 23.685258] IP: snd_seq_oss_readq_puts+0x146/0x210 [ 23.686329] PGD 3e879067 P4D 3e879067 PUD 6d82e067 PMD 3b0c4067 PTE 0 executing program [ 23.687241] Oops: 0000 [#1] SMP KASAN [ 23.687711] Dumping ftrace buffer: [ 23.688136] (ftrace buffer empty) [ 23.688561] Modules linked in: [ 23.688887] CPU: 1 PID: 3048 Comm: syzkaller563962 Not tainted 4.14.0-rc1-next-20170918+ #6 executing program [ 23.689880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 executing program [ 23.690952] task: ffff88003b6a2480 task.stack: ffff88003cc28000 executing program [ 23.692153] RIP: 0010:snd_seq_oss_readq_puts+0x146/0x210 [ 23.692933] RSP: 0018:ffff88003cc2f208 EFLAGS: 00010246 executing program [ 23.693618] RAX: ffffed0007985e4a RBX: ffffc90000b4d000 RCX: ffff88003cc2f251 executing program [ 23.694929] RDX: 0000000000000000 RSI: 1ffff100076d45a7 RDI: 0000000000000282 [ 23.696529] RBP: ffff88003cc2f2b8 R08: ffff88003d737450 R09: 0000000000000000 [ 23.697287] R10: 0000000000000000 R11: 0000000000000000 R12: 000000003fffffa4 executing program executing program [ 23.698071] R13: ffff88003cc2f290 R14: ffffc90000b4d001 R15: dffffc0000000000 [ 23.702970] FS: 0000000001b3f880(0000) GS:ffff88003ed00000(0000) knlGS:0000000000000000 executing program [ 23.703758] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.704476] CR2: ffffc90000b4d000 CR3: 000000003c8d7000 CR4: 00000000000006e0 executing program [ 23.705078] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 executing program [ 23.705994] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.707065] Call Trace: [ 23.707314] ? snd_seq_oss_readq_put_event+0x240/0x240 executing program [ 23.707800] ? trace_hardirqs_on+0xd/0x10 [ 23.708413] ? find_slot+0x11d/0x150 [ 23.709032] snd_seq_oss_midi_input+0xd39/0x1040 executing program [ 23.709571] ? do_raw_spin_trylock+0x190/0x190 [ 23.710103] ? snd_seq_oss_midi_get_addr+0x170/0x170 [ 23.710829] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 23.711324] ? snd_seq_oss_process_event+0x2570/0x2570 [ 23.711816] snd_seq_oss_event_input+0x15d/0x220 executing program [ 23.712315] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 23.713479] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 23.714006] ? queueptr+0x79/0xa0 [ 23.714357] ? snd_seq_timer_get_cur_tick+0xd/0x40 [ 23.714856] ? update_timestamp_of_queue+0x14d/0x200 executing program [ 23.715297] snd_seq_deliver_event+0x318/0x790 [ 23.716032] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 executing program [ 23.716653] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.717332] ? snd_seq_client_use_ptr+0x85/0x330 [ 23.717664] snd_seq_kernel_client_dispatch+0x11e/0x150 [ 23.718116] dummy_input+0x2c4/0x400 executing program [ 23.718480] ? dummy_free+0x20/0x20 [ 23.719070] ? snd_seq_port_use_ptr+0x12d/0x1c0 [ 23.719553] ? dummy_free+0x20/0x20 [ 23.719952] snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 [ 23.721338] ? snd_seq_ioctl_running_mode+0x150/0x150 [ 23.721834] ? snd_seq_client_use_ptr+0x3c/0x330 [ 23.722322] snd_seq_deliver_event+0x12c/0x790 executing program [ 23.722660] ? do_raw_spin_trylock+0x190/0x190 [ 23.723205] ? snd_seq_deliver_single_event.constprop.11+0x940/0x940 executing program [ 23.723764] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 23.724337] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.724861] ? trace_hardirqs_on+0xd/0x10 [ 23.725236] ? snd_seq_client_use_ptr+0x85/0x330 executing program [ 23.725618] snd_seq_dispatch_event+0x105/0x5b0 [ 23.726311] ? _raw_spin_unlock_irqrestore+0x31/0xba executing program [ 23.726769] ? snd_seq_kernel_client_dispatch+0x150/0x150 [ 23.727849] ? trace_hardirqs_on+0xd/0x10 executing program [ 23.728590] snd_seq_check_queue.part.3+0x38e/0x510 [ 23.729130] snd_seq_enqueue_event+0x32d/0x3d0 [ 23.729610] ? queueptr+0x79/0xa0 executing program [ 23.729933] snd_seq_client_enqueue_event+0x21b/0x420 executing program [ 23.730679] ? snd_seq_deliver_event+0x790/0x790 [ 23.731871] ? trace_hardirqs_on+0xd/0x10 executing program [ 23.732502] ? snd_seq_client_use_ptr+0x85/0x330 [ 23.733132] kernel_client_enqueue.part.10+0xb5/0xd0 [ 23.733670] snd_seq_kernel_client_enqueue_blocking+0xcf/0x110 [ 23.734254] snd_seq_oss_write+0x5fe/0xa80 [ 23.734687] ? snd_seq_oss_read+0x3e0/0x3e0 executing program [ 23.735103] odev_write+0x64/0x90 [ 23.735763] ? odev_poll+0x80/0x80 [ 23.736199] __vfs_write+0xef/0x970 [ 23.736637] ? kernel_read+0x120/0x120 [ 23.737058] ? __might_sleep+0x95/0x190 [ 23.737456] ? __inode_security_revalidate+0xd9/0x130 [ 23.738098] ? avc_policy_seqno+0x9/0x20 [ 23.738659] ? selinux_file_permission+0x82/0x460 [ 23.739307] ? security_file_permission+0x89/0x1f0 executing program [ 23.739756] ? rw_verify_area+0xe5/0x2b0 executing program [ 23.740585] ? __fdget_raw+0x20/0x20 [ 23.741292] vfs_write+0x18f/0x510 [ 23.741899] SyS_write+0xef/0x220 [ 23.743561] ? lockdep_sys_exit+0x47/0xf0 [ 23.743990] ? SyS_read+0x220/0x220 [ 23.744356] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.744774] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.745259] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 23.745602] RIP: 0033:0x435d19 executing program [ 23.745825] RSP: 002b:00007ffd03050fc8 EFLAGS: 00000203 ORIG_RAX: 0000000000000001 executing program [ 23.746584] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000435d19 [ 23.747165] RDX: 0000000000000150 RSI: 0000000020e7f000 RDI: 0000000000000003 [ 23.747974] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 23.748629] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000000000 [ 23.749282] R13: 0000000000402060 R14: 00000000004020f0 R15: 0000000000000000 [ 23.749940] 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 [ 23.751723] RIP: snd_seq_oss_readq_puts+0x146/0x210 RSP: ffff88003cc2f208 executing program [ 23.752350] CR2: ffffc90000b4d000 [ 23.754682] ---[ end trace ccf00adb7083ea78 ]--- executing program executing program [ 23.755480] Kernel panic - not syncing: Fatal exception [ 23.756648] Dumping ftrace buffer: [ 23.757058] (ftrace buffer empty) [ 23.757559] Kernel Offset: disabled [ 23.757973] Rebooting in 86400 seconds..