[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.84' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.049323][ T28] audit: type=1400 audit(1594967549.029:8): avc: denied { execmem } for pid=6824 comm="syz-executor129" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 63.053295][ T6824] ------------[ cut here ]------------ [ 63.076276][ T6824] WARNING: CPU: 0 PID: 6824 at sound/core/info.c:609 snd_info_get_line+0x26a/0x320 [ 63.085647][ T6824] Kernel panic - not syncing: panic_on_warn set ... [ 63.092227][ T6824] CPU: 0 PID: 6824 Comm: syz-executor129 Not tainted 5.8.0-rc5-syzkaller #0 [ 63.100908][ T6824] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.110945][ T6824] Call Trace: [ 63.114219][ T6824] dump_stack+0x18f/0x20d [ 63.118533][ T6824] panic+0x2e3/0x75c [ 63.122408][ T6824] ? __warn_printk+0xf3/0xf3 [ 63.126977][ T6824] ? printk+0xba/0xed [ 63.130953][ T6824] ? log_store.cold+0x16/0x16 [ 63.135618][ T6824] ? __warn.cold+0x5/0x45 [ 63.139920][ T6824] ? __warn+0xd6/0x1f2 [ 63.143965][ T6824] ? snd_info_get_line+0x26a/0x320 [ 63.149061][ T6824] __warn.cold+0x20/0x45 [ 63.153283][ T6824] ? snd_info_get_line+0x26a/0x320 [ 63.158371][ T6824] report_bug+0x1bd/0x210 [ 63.162681][ T6824] handle_bug+0x38/0x90 [ 63.167002][ T6824] exc_invalid_op+0x13/0x40 [ 63.171490][ T6824] asm_exc_invalid_op+0x12/0x20 [ 63.176322][ T6824] RIP: 0010:snd_info_get_line+0x26a/0x320 [ 63.182019][ T6824] 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 [ 63.201609][ T6824] RSP: 0018:ffffc90000f879a8 EFLAGS: 00010293 [ 63.207652][ T6824] RAX: 0000000000000000 RBX: ffff88809da6f640 RCX: 0000000000000000 [ 63.215600][ T6824] RDX: ffff8880a2184400 RSI: ffffffff8607714a RDI: ffff88809da6f640 [ 63.223545][ T6824] RBP: 0000000000000080 R08: 0000000000000000 R09: ffff888214d773db [ 63.231494][ T6824] R10: ffffed10429aee7b R11: 0000000000000000 R12: ffff88809a320780 [ 63.239598][ T6824] R13: dffffc0000000000 R14: ffff88809e08aec8 R15: ffff88809da6f640 [ 63.247581][ T6824] ? snd_info_get_line+0x26a/0x320 [ 63.252678][ T6824] ? snd_info_get_line+0x26a/0x320 [ 63.257769][ T6824] ? __lock_acquire+0x16e3/0x56e0 [ 63.263212][ T6824] snd_mixer_oss_proc_write+0xe2/0x530 [ 63.268654][ T6824] ? snd_mixer_oss_notify_handler+0x8d0/0x8d0 [ 63.274708][ T6824] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 63.280676][ T6824] ? mark_lock+0xbc/0x1710 [ 63.285074][ T6824] ? stack_trace_save+0x8c/0xc0 [ 63.289920][ T6824] ? find_held_lock+0x2d/0x110 [ 63.294659][ T6824] ? close_pdeo.part.0+0x4a/0x2e0 [ 63.299696][ T6824] ? lock_downgrade+0x820/0x820 [ 63.304548][ T6824] ? lock_release+0x8d0/0x8d0 [ 63.309218][ T6824] snd_info_text_entry_release+0xfa/0x260 [ 63.314920][ T6824] ? snd_mixer_oss_notify_handler+0x8d0/0x8d0 [ 63.321051][ T6824] ? snd_info_register+0x3e0/0x3e0 [ 63.326140][ T6824] close_pdeo.part.0+0xdc/0x2e0 [ 63.330966][ T6824] proc_reg_release+0x2e9/0x360 [ 63.335797][ T6824] ? close_pdeo+0x170/0x170 [ 63.340275][ T6824] ? locks_remove_file+0x319/0x580 [ 63.345362][ T6824] ? fsnotify_first_mark+0x1f0/0x1f0 [ 63.350625][ T6824] ? fcntl_setlk+0xf60/0xf60 [ 63.355191][ T6824] ? lock_is_held_type+0xb0/0xe0 [ 63.360117][ T6824] ? integrity_iint_find+0x123/0x150 [ 63.365380][ T6824] ? ima_file_free+0xdd/0x420 [ 63.370031][ T6824] ? close_pdeo+0x170/0x170 [ 63.374509][ T6824] __fput+0x33c/0x880 [ 63.378488][ T6824] task_work_run+0xdd/0x190 [ 63.382979][ T6824] do_exit+0xb72/0x2a40 [ 63.387129][ T6824] ? mm_update_next_owner+0x7a0/0x7a0 [ 63.394835][ T6824] ? __sb_end_write+0xf8/0x1d0 [ 63.399585][ T6824] ? vfs_write+0x1b0/0x6b0 [ 63.403975][ T6824] ? ksys_write+0x1a5/0x250 [ 63.408455][ T6824] do_group_exit+0x125/0x310 [ 63.413019][ T6824] __x64_sys_exit_group+0x3a/0x50 [ 63.418018][ T6824] do_syscall_64+0x60/0xe0 [ 63.422412][ T6824] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.428301][ T6824] RIP: 0033:0x43eeb8 [ 63.432166][ T6824] Code: Bad RIP value. [ 63.436206][ T6824] RSP: 002b:00007fff4bcf34e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 63.444590][ T6824] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043eeb8 [ 63.452712][ T6824] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 63.460661][ T6824] RBP: 00000000004be6c8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 63.468626][ T6824] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 63.476662][ T6824] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 63.486270][ T6824] Kernel Offset: disabled [ 63.490668][ T6824] Rebooting in 86400 seconds..