[  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.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.15.221' (ECDSA) to the list of known hosts.
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syzkaller login: [   49.541662][ T6835] ------------[ cut here ]------------
[   49.561262][ T6835] WARNING: CPU: 0 PID: 6835 at sound/core/oss/mulaw.c:332 snd_pcm_plugin_build_mulaw+0x4ef/0x6e0
[   49.577843][ T6839] ------------[ cut here ]------------
[   49.597710][ T6839] WARNING: CPU: 1 PID: 6839 at sound/core/oss/mulaw.c:332 snd_pcm_plugin_build_mulaw+0x4ef/0x6e0
[   49.601053][ T6835] Kernel panic - not syncing: panic_on_warn set ...
[   49.615185][ T6835] CPU: 0 PID: 6835 Comm: syz-executor088 Not tainted 5.9.0-rc2-syzkaller #0
[   49.617257][ T6839] Modules linked in:
[   49.624138][ T6835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.624144][ T6835] Call Trace:
[   49.624165][ T6835]  dump_stack+0x1f0/0x31e
[   49.624179][ T6835]  panic+0x264/0x7a0
[   49.624191][ T6835]  ? __warn+0x102/0x250
[   49.624203][ T6835]  ? snd_pcm_plugin_build_mulaw+0x4ef/0x6e0
[   49.624213][ T6835]  ? snd_pcm_plugin_build_mulaw+0x4ef/0x6e0
[   49.624223][ T6835]  __warn+0x227/0x250
[   49.624235][ T6835]  ? snd_pcm_plugin_build_mulaw+0x4ef/0x6e0
[   49.624245][ T6835]  report_bug+0x1b1/0x2e0
[   49.624264][ T6835]  handle_bug+0x42/0x80
[   49.629083][ T6839] CPU: 1 PID: 6839 Comm: syz-executor088 Not tainted 5.9.0-rc2-syzkaller #0
[   49.638426][ T6835]  exc_invalid_op+0x16/0x40
[   49.638438][ T6835]  asm_exc_invalid_op+0x12/0x20
[   49.638452][ T6835] RIP: 0010:snd_pcm_plugin_build_mulaw+0x4ef/0x6e0
[   49.638462][ T6835] Code: 0f 0b bb fa ff ff ff eb cd e8 fd e3 2d fb 0f 0b bb fa ff ff ff eb bf e8 ef e3 2d fb 0f 0b bb fa ff ff ff eb b1 e8 e1 e3 2d fb <0f> 0b bb fa ff ff ff eb a3 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 77
[   49.638468][ T6835] RSP: 0018:ffffc90001ed7950 EFLAGS: 00010293
[   49.638476][ T6835] RAX: ffffffff8647143f RBX: 0000000000000000 RCX: ffff88808dcbc540
[   49.638482][ T6835] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   49.638488][ T6835] RBP: ffffffff86471e70 R08: ffffffff864710ee R09: fffff520003daf47
[   49.638494][ T6835] R10: fffff520003daf47 R11: 0000000000000000 R12: 1ffff920003daf45
[   49.638500][ T6835] R13: ffffc90001ed7a18 R14: ffffc90001ed7a28 R15: ffffc90001ed7a28
[   49.638511][ T6835]  ? mulaw_encode+0x840/0x840
[   49.638521][ T6835]  ? snd_pcm_plugin_build_mulaw+0x19e/0x6e0
[   49.638530][ T6835]  ? snd_pcm_plugin_build_mulaw+0x4ef/0x6e0
[   49.638550][ T6835]  snd_pcm_plug_format_plugins+0xbbd/0x1640
[   49.642505][ T6839] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   49.646160][ T6835]  snd_pcm_oss_change_params_locked+0x2c29/0x4410
[   49.646199][ T6835]  snd_pcm_oss_make_ready+0x115/0x2b0
[   49.646212][ T6835]  snd_pcm_oss_sync+0x265/0x900
[   49.646222][ T6835]  ? __fsnotify_parent+0x2ea/0x620
[   49.646235][ T6835]  snd_pcm_oss_release+0x119/0x270
[   49.646251][ T6835]  ? snd_pcm_oss_open+0x2110/0x2110
[   49.650621][ T6839] RIP: 0010:snd_pcm_plugin_build_mulaw+0x4ef/0x6e0
[   49.654291][ T6835]  __fput+0x34f/0x7b0
[   49.654309][ T6835]  task_work_run+0x137/0x1c0
[   49.654324][ T6835]  do_exit+0x5f3/0x1f20
[   49.654345][ T6835]  do_group_exit+0x161/0x2d0
[   49.654356][ T6835]  ? syscall_enter_from_user_mode+0x24/0x1a0
[   49.654367][ T6835]  __do_sys_exit_group+0x13/0x20
[   49.654376][ T6835]  __se_sys_exit_group+0x10/0x10
[   49.654395][ T6835]  __x64_sys_exit_group+0x37/0x40
[   49.660807][ T6839] Code: 0f 0b bb fa ff ff ff eb cd e8 fd e3 2d fb 0f 0b bb fa ff ff ff eb bf e8 ef e3 2d fb 0f 0b bb fa ff ff ff eb b1 e8 e1 e3 2d fb <0f> 0b bb fa ff ff ff eb a3 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 77
[   49.666185][ T6835]  do_syscall_64+0x31/0x70
[   49.666196][ T6835]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   49.666207][ T6835] RIP: 0033:0x440038
[   49.666211][ T6835] Code: Bad RIP value.
[   49.666217][ T6835] RSP: 002b:00007ffe721a2058 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   49.666228][ T6835] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440038
[   49.666233][ T6835] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   49.666239][ T6835] RBP: 00000000004bf870 R08: 00000000000000e7 R09: ffffffffffffffd0
[   49.666245][ T6835] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[   49.666251][ T6835] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000
[   49.671383][ T6835] Kernel Offset: disabled
[   49.982756][ T6835] Rebooting in 86400 seconds..