[ 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 '10.128.1.39' (ECDSA) to the list of known hosts. 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 67.310216][ T6896] ------------[ cut here ]------------ [ 67.318172][ T6898] ------------[ cut here ]------------ [ 67.331780][ T6898] WARNING: CPU: 0 PID: 6898 at sound/core/oss/mulaw.c:332 snd_pcm_plugin_build_mulaw+0x6b2/0x7e0 [ 67.334154][ T6896] WARNING: CPU: 1 PID: 6896 at sound/core/oss/mulaw.c:332 snd_pcm_plugin_build_mulaw+0x6b2/0x7e0 [ 67.368049][ T6898] Kernel panic - not syncing: panic_on_warn set ... [ 67.370968][ T6896] Modules linked in: [ 67.374687][ T6898] CPU: 0 PID: 6898 Comm: syz-executor907 Not tainted 5.9.0-rc2-syzkaller #0 [ 67.374696][ T6898] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.374701][ T6898] Call Trace: [ 67.374727][ T6898] dump_stack+0x18f/0x20d [ 67.374749][ T6898] panic+0x2e3/0x75c [ 67.383740][ T6896] CPU: 1 PID: 6896 Comm: syz-executor907 Not tainted 5.9.0-rc2-syzkaller #0 [ 67.387300][ T6898] ? __warn_printk+0xf3/0xf3 [ 67.387320][ T6898] ? printk+0xba/0xed [ 67.387339][ T6898] ? log_store.cold+0x16/0x16 [ 67.400453][ T6896] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.400696][ T6898] ? __warn.cold+0x5/0x4a [ 67.405148][ T6896] RIP: 0010:snd_pcm_plugin_build_mulaw+0x6b2/0x7e0 [ 67.408908][ T6898] ? __warn+0xd6/0x1f2 [ 67.408928][ T6898] ? snd_pcm_plugin_build_mulaw+0x6b2/0x7e0 [ 67.408942][ T6898] __warn.cold+0x20/0x4a [ 67.408961][ T6898] ? snd_pcm_plugin_build_mulaw+0x6b2/0x7e0 [ 67.408977][ T6898] report_bug+0x1bd/0x210 [ 67.408998][ T6898] handle_bug+0x38/0x90 [ 67.409012][ T6898] exc_invalid_op+0x14/0x40 [ 67.409026][ T6898] asm_exc_invalid_op+0x12/0x20 [ 67.409052][ T6898] RIP: 0010:snd_pcm_plugin_build_mulaw+0x6b2/0x7e0 [ 67.424313][ T6896] Code: ff e8 a2 28 5e fb 0f 0b 41 bc fa ff ff ff e9 fc fe ff ff e8 90 28 5e fb 0f 0b 41 bc fa ff ff ff e9 ea fe ff ff e8 7e 28 5e fb <0f> 0b 41 bc fa ff ff ff e9 d8 fe ff ff e8 ec 40 9e fb e9 7b fa ff [ 67.426289][ T6898] Code: ff e8 a2 28 5e fb 0f 0b 41 bc fa ff ff ff e9 fc fe ff ff e8 90 28 5e fb 0f 0b 41 bc fa ff ff ff e9 ea fe ff ff e8 7e 28 5e fb <0f> 0b 41 bc fa ff ff ff e9 d8 fe ff ff e8 ec 40 9e fb e9 7b fa ff [ 67.426299][ T6898] RSP: 0018:ffffc900053479b0 EFLAGS: 00010293 [ 67.426312][ T6898] RAX: 0000000000000000 RBX: ffffc90005347a98 RCX: ffffffff86161229 [ 67.426328][ T6898] RDX: ffff88809325a0c0 RSI: ffffffff86161692 RDI: 0000000000000005 [ 67.433754][ T6896] RSP: 0018:ffffc900053c7910 EFLAGS: 00010293 [ 67.441036][ T6898] RBP: 1ffff92000a68f38 R08: 0000000000000000 R09: ffffffff8ab2364f [ 67.441045][ T6898] R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90005347ab8 [ 67.441054][ T6898] R13: ffffc90005347ad8 R14: 0000000000000000 R15: ffffc90005347ad8 [ 67.441089][ T6898] ? snd_pcm_plugin_build_mulaw+0x249/0x7e0 [ 67.441105][ T6898] ? snd_pcm_plugin_build_mulaw+0x6b2/0x7e0 [ 67.441125][ T6898] ? mulaw_decode+0x750/0x750 [ 67.441149][ T6898] ? mulaw_encode+0x780/0x780 [ 67.449419][ T6896] RAX: 0000000000000000 RBX: ffffc900053c79f8 RCX: ffffffff86161229 [ 67.451979][ T6898] ? cpu_latency_qos_add_request+0x103/0x3d0 [ 67.452007][ T6898] snd_pcm_plug_format_plugins+0xb76/0x1360 [ 67.452027][ T6898] ? snd_pcm_plug_slave_format+0x5a0/0x5a0 [ 67.456206][ T6896] RDX: ffff88808dfe2040 RSI: ffffffff86161692 RDI: 0000000000000005 [ 67.462001][ T6898] ? snd_pcm_oss_disconnect_minor+0x340/0x340 [ 67.462026][ T6898] snd_pcm_oss_change_params_locked+0x3015/0x3430 [ 67.462051][ T6898] ? snd_pcm_plugin_append+0x190/0x190 [ 67.462069][ T6898] ? mutex_lock_io_nested+0xf60/0xf60 [ 67.462092][ T6898] ? tomoyo_path_number_perm+0x244/0x4d0 [ 67.462114][ T6898] ? lock_acquire+0x1f1/0xad0 [ 67.462134][ T6898] ? __might_fault+0xef/0x1d0 [ 67.473513][ T6896] RBP: 1ffff92000a78f24 R08: 0000000000000000 R09: ffffffff8ab2364f [ 67.477136][ T6898] snd_pcm_oss_get_active_substream+0x164/0x1c0 [ 67.477158][ T6898] snd_pcm_oss_get_formats+0x75/0x340 [ 67.477179][ T6898] ? snd_pcm_oss_get_active_substream+0x1c0/0x1c0 [ 67.708749][ T6898] snd_pcm_oss_ioctl+0xfd3/0x3370 [ 67.713889][ T6898] ? _down_write_nest_lock+0x150/0x150 [ 67.719376][ T6898] ? snd_pcm_oss_release+0x300/0x300 [ 67.724670][ T6898] ? vmacache_update+0xce/0x140 [ 67.729533][ T6898] ? bpf_lsm_file_ioctl+0x5/0x10 [ 67.734478][ T6898] ? snd_pcm_oss_release+0x300/0x300 [ 67.739772][ T6898] __x64_sys_ioctl+0x193/0x200 [ 67.744563][ T6898] do_syscall_64+0x2d/0x70 [ 67.748982][ T6898] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.754876][ T6898] RIP: 0033:0x4413c9 [ 67.758771][ T6898] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 6b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.778386][ T6898] RSP: 002b:00007ffdbf50d928 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 67.786813][ T6898] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004413c9 [ 67.794795][ T6898] RDX: 0000000020000000 RSI: 00000000c0045005 RDI: 0000000000000003 [ 67.802792][ T6898] RBP: 0000000000010681 R08: 00000000004002c8 R09: 00000000004002c8 [ 67.810788][ T6898] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004020c0 [ 67.818772][ T6898] R13: 0000000000402150 R14: 0000000000000000 R15: 0000000000000000 [ 67.828123][ T6898] Kernel Offset: disabled [ 67.832525][ T6898] Rebooting in 86400 seconds..