[ 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 '10.128.0.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.186367] audit: type=1400 audit(1594918715.816:8): avc: denied { execmem } for pid=6333 comm="syz-executor562" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 36.190732] ------------[ cut here ]------------ [ 36.211225] WARNING: CPU: 1 PID: 6333 at sound/core/info.c:637 snd_info_get_line+0x1fd/0x2d0 [ 36.219788] Kernel panic - not syncing: panic_on_warn set ... [ 36.219788] [ 36.227184] CPU: 1 PID: 6333 Comm: syz-executor562 Not tainted 4.14.184-syzkaller #0 [ 36.235151] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.244504] Call Trace: [ 36.247092] dump_stack+0x1b2/0x283 [ 36.250723] panic+0x1f9/0x42d [ 36.253916] ? add_taint.cold+0x16/0x16 [ 36.257903] ? snd_info_get_line+0x1fd/0x2d0 [ 36.262304] ? snd_info_get_line+0x1fd/0x2d0 [ 36.266722] __warn.cold+0x2f/0x30 [ 36.270376] ? ist_end_non_atomic+0x10/0x10 [ 36.274718] ? snd_info_get_line+0x1fd/0x2d0 [ 36.279164] report_bug+0x20a/0x248 [ 36.282986] do_error_trap+0x195/0x2d0 [ 36.287180] ? math_error+0x2d0/0x2d0 [ 36.290982] ? trace_hardirqs_on+0x10/0x10 [ 36.295223] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.300058] invalid_op+0x1b/0x40 [ 36.303496] RIP: 0010:snd_info_get_line+0x1fd/0x2d0 [ 36.308510] RSP: 0018:ffff8880819079a0 EFLAGS: 00010297 [ 36.313863] RAX: ffff88809b7c6600 RBX: ffff88809a153580 RCX: 0000000000000000 [ 36.321131] RDX: 0000000000000000 RSI: ffff888081907aa0 RDI: ffff88809a153580 [ 36.328570] RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000 [ 36.336412] R10: ffff88809b7c6e88 R11: ffff88809b7c6600 R12: ffff88809b003580 [ 36.343668] R13: 0000000000000080 R14: ffff888216308700 R15: ffff88809a153580 [ 36.350967] snd_mixer_oss_proc_write+0xc9/0x480 [ 36.355726] ? snd_mixer_oss_build_input+0xc30/0xc30 [ 36.361184] ? __lock_acquire+0x655/0x42a0 [ 36.365735] ? __save_stack_trace+0x7b/0xd0 [ 36.370228] ? check_preemption_disabled+0x35/0x240 [ 36.375242] ? close_pdeo.part.0+0x4f/0x2c0 [ 36.379553] snd_info_text_entry_release+0xfa/0x260 [ 36.384594] ? snd_mixer_oss_build_input+0xc30/0xc30 [ 36.389715] ? snd_info_register_recursive+0x110/0x110 [ 36.395083] close_pdeo.part.0+0xdd/0x2c0 [ 36.399569] ? fsnotify+0x897/0x1110 [ 36.403319] close_pdeo+0x125/0x140 [ 36.407496] ? close_pdeo.part.0+0x2c0/0x2c0 [ 36.411960] ? lock_acquire+0x170/0x3f0 [ 36.415958] ? proc_reg_release+0x4b/0x110 [ 36.420255] ? locks_remove_file+0x2d3/0x420 [ 36.424681] proc_reg_release+0xca/0x110 [ 36.428855] ? close_pdeo+0x140/0x140 [ 36.432653] __fput+0x25f/0x7a0 [ 36.435926] task_work_run+0x113/0x190 [ 36.439834] do_exit+0x9fb/0x2ae0 [ 36.443284] ? lock_downgrade+0x6e0/0x6e0 [ 36.447442] ? mm_update_next_owner+0x5b0/0x5b0 [ 36.452115] ? vfs_write+0x319/0x4d0 [ 36.455826] ? SyS_write+0x14d/0x210 [ 36.459538] do_group_exit+0x100/0x2e0 [ 36.463418] SyS_exit_group+0x19/0x20 [ 36.467234] ? do_group_exit+0x2e0/0x2e0 [ 36.471278] do_syscall_64+0x1d5/0x640 [ 36.475169] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 36.480363] RIP: 0033:0x43eeb8 [ 36.483537] RSP: 002b:00007ffe8933cb48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 36.491290] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043eeb8 [ 36.498664] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 36.505923] RBP: 00000000004be6c8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 36.513234] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 36.520503] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 36.528982] Kernel Offset: disabled [ 36.532668] Rebooting in 86400 seconds..