[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.137' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.886941][ T6827] ------------[ cut here ]------------ [ 57.893019][ T6827] WARNING: CPU: 1 PID: 6827 at sound/core/info.c:609 snd_info_get_line+0x26a/0x320 [ 57.904032][ T6827] Kernel panic - not syncing: panic_on_warn set ... [ 57.911075][ T6827] CPU: 1 PID: 6827 Comm: syz-executor178 Not tainted 5.8.0-rc5-syzkaller #0 [ 57.920071][ T6827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.930228][ T6827] Call Trace: [ 57.933511][ T6827] dump_stack+0x18f/0x20d [ 57.937838][ T6827] panic+0x2e3/0x75c [ 57.941751][ T6827] ? __warn_printk+0xf3/0xf3 [ 57.946322][ T6827] ? printk+0xba/0xed [ 57.950301][ T6827] ? log_store.cold+0x16/0x16 [ 57.955712][ T6827] ? __warn.cold+0x5/0x45 [ 57.960046][ T6827] ? __warn+0xd6/0x1f2 [ 57.964105][ T6827] ? snd_info_get_line+0x26a/0x320 [ 57.969203][ T6827] __warn.cold+0x20/0x45 [ 57.973519][ T6827] ? snd_info_get_line+0x26a/0x320 [ 57.978850][ T6827] report_bug+0x1bd/0x210 [ 57.983196][ T6827] handle_bug+0x38/0x90 [ 57.987471][ T6827] exc_invalid_op+0x13/0x40 [ 57.992055][ T6827] asm_exc_invalid_op+0x12/0x20 [ 57.996921][ T6827] RIP: 0010:snd_info_get_line+0x26a/0x320 [ 58.002713][ T6827] Code: 85 b3 00 00 00 48 8b 44 24 10 c6 00 00 e8 ce 48 6c fb 8b 44 24 0c 48 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 b6 48 6c fb <0f> 0b c7 44 24 0c 01 00 00 00 eb d7 e8 a5 48 6c fb 48 8b 74 24 10 [ 58.023569][ T6827] RSP: 0018:ffffc90000f879a8 EFLAGS: 00010293 [ 58.030617][ T6827] RAX: 0000000000000000 RBX: ffff88809ff2e880 RCX: 0000000000000000 [ 58.038758][ T6827] RDX: ffff8880961ec440 RSI: ffffffff8607714a RDI: ffff88809ff2e880 [ 58.046724][ T6827] RBP: 0000000000000080 R08: 0000000000000000 R09: ffff8882153ea29b [ 58.054675][ T6827] R10: ffffed1042a7d453 R11: 0000000000000000 R12: ffff8880a2228000 [ 58.062729][ T6827] R13: dffffc0000000000 R14: ffff8880a6891448 R15: ffff88809ff2e880 [ 58.070751][ T6827] ? snd_info_get_line+0x26a/0x320 [ 58.076180][ T6827] ? snd_info_get_line+0x26a/0x320 [ 58.081279][ T6827] ? __lock_acquire+0x16e3/0x56e0 [ 58.086492][ T6827] snd_mixer_oss_proc_write+0xe2/0x530 [ 58.092119][ T6827] ? snd_mixer_oss_notify_handler+0x8d0/0x8d0 [ 58.098363][ T6827] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.104362][ T6827] ? mark_lock+0xbc/0x1710 [ 58.108867][ T6827] ? stack_trace_save+0x8c/0xc0 [ 58.113725][ T6827] ? find_held_lock+0x2d/0x110 [ 58.118491][ T6827] ? close_pdeo.part.0+0x4a/0x2e0 [ 58.123518][ T6827] ? lock_downgrade+0x820/0x820 [ 58.128534][ T6827] ? lock_release+0x8d0/0x8d0 [ 58.133205][ T6827] snd_info_text_entry_release+0xfa/0x260 [ 58.138910][ T6827] ? snd_mixer_oss_notify_handler+0x8d0/0x8d0 [ 58.144957][ T6827] ? snd_info_register+0x3e0/0x3e0 [ 58.150072][ T6827] close_pdeo.part.0+0xdc/0x2e0 [ 58.154904][ T6827] proc_reg_release+0x2e9/0x360 [ 58.160616][ T6827] ? close_pdeo+0x170/0x170 [ 58.165376][ T6827] ? locks_remove_file+0x319/0x580 [ 58.170511][ T6827] ? fsnotify_first_mark+0x1f0/0x1f0 [ 58.176148][ T6827] ? fcntl_setlk+0xf60/0xf60 [ 58.180762][ T6827] ? lock_is_held_type+0xb0/0xe0 [ 58.186562][ T6827] ? integrity_iint_find+0x123/0x150 [ 58.193392][ T6827] ? ima_file_free+0xdd/0x420 [ 58.198066][ T6827] ? close_pdeo+0x170/0x170 [ 58.202555][ T6827] __fput+0x33c/0x880 [ 58.206637][ T6827] task_work_run+0xdd/0x190 [ 58.211146][ T6827] do_exit+0xb72/0x2a40 [ 58.215284][ T6827] ? mm_update_next_owner+0x7a0/0x7a0 [ 58.220636][ T6827] ? __sb_end_write+0xf8/0x1d0 [ 58.225380][ T6827] ? vfs_write+0x1b0/0x6b0 [ 58.229777][ T6827] ? ksys_write+0x1a5/0x250 [ 58.234265][ T6827] do_group_exit+0x125/0x310 [ 58.238939][ T6827] __x64_sys_exit_group+0x3a/0x50 [ 58.243950][ T6827] do_syscall_64+0x60/0xe0 [ 58.248365][ T6827] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.254241][ T6827] RIP: 0033:0x43eeb8 [ 58.258110][ T6827] Code: Bad RIP value. [ 58.262809][ T6827] RSP: 002b:00007ffd49c7c448 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 58.271201][ T6827] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043eeb8 [ 58.279154][ T6827] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 58.287473][ T6827] RBP: 00000000004be6c8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 58.295824][ T6827] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 58.304357][ T6827] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 58.314799][ T6827] Kernel Offset: disabled [ 58.319695][ T6827] Rebooting in 86400 seconds..