[ 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 '10.128.1.28' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 56.426747] audit: type=1400 audit(1599459437.406:8): avc: denied { execmem } for pid=6471 comm="syz-executor116" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 executing program executing program executing program executing program executing program executing program executing program [ 57.119075] ------------[ cut here ]------------ [ 57.136018] WARNING: CPU: 0 PID: 6488 at sound/core/oss/mulaw.c:332 snd_pcm_plugin_build_mulaw.cold+0x11/0x7c [ 57.146199] Kernel panic - not syncing: panic_on_warn set ... [ 57.146199] [ 57.153962] CPU: 0 PID: 6488 Comm: syz-executor116 Not tainted 4.19.143-syzkaller #0 [ 57.161859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.171827] Call Trace: [ 57.174445] dump_stack+0x1fc/0x2fe [ 57.178089] panic+0x26a/0x50e [ 57.181414] ? __warn_printk+0xf3/0xf3 [ 57.185605] ? snd_pcm_plugin_build_mulaw.cold+0x11/0x7c [ 57.191255] ? __probe_kernel_read+0x16c/0x1b0 [ 57.196232] ? __warn.cold+0x5/0x61 [ 57.200002] ? __warn+0xe4/0x200 [ 57.203570] ? snd_pcm_plugin_build_mulaw.cold+0x11/0x7c [ 57.209660] __warn.cold+0x20/0x61 [ 57.213316] ? io_schedule_timeout+0x140/0x140 [ 57.217925] ? snd_pcm_plugin_build_mulaw.cold+0x11/0x7c [ 57.223628] report_bug+0x262/0x2b0 [ 57.227277] do_error_trap+0x1d7/0x310 [ 57.231264] ? math_error+0x310/0x310 [ 57.235082] ? __irq_work_queue_local+0x101/0x160 [ 57.240002] ? irq_work_queue+0x29/0x80 [ 57.244144] ? wake_up_klogd.part.0+0x8c/0xc0 [ 57.248658] ? trace_hardirqs_off_caller+0x69/0x210 [ 57.253842] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.258889] invalid_op+0x14/0x20 [ 57.262769] RIP: 0010:snd_pcm_plugin_build_mulaw.cold+0x11/0x7c executing program [ 57.268935] Code: c7 c7 e0 fe 22 88 e8 d9 b6 c1 fb 0f 0b 49 c7 c4 fa ff ff ff e9 df e8 ff ff e8 a7 aa d6 fb 48 c7 c7 e0 fe 22 88 e8 ba b6 c1 fb <0f> 0b 41 bc fa ff ff ff e9 85 fd ff ff e8 89 aa d6 fb 48 c7 c7 e0 [ 57.287862] RSP: 0018:ffff88809723f8c8 EFLAGS: 00010282 [ 57.293250] RAX: 0000000000000024 RBX: ffff88809723f9b0 RCX: 0000000000000000 [ 57.300540] RDX: 0000000000000000 RSI: ffffffff8154d001 RDI: ffffed1012e47f0b [ 57.305486] ------------[ cut here ]------------ [ 57.308207] RBP: 1ffff11012e47f1b R08: 0000000000000024 R09: 0000000000000000 [ 57.308215] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809723f9d0 [ 57.308224] R13: ffff88809723f9f0 R14: 0000000000000000 R15: ffff88809723f9f0 [ 57.308252] ? vprintk_func+0x81/0x17e [ 57.308273] ? snd_pcm_plugin_build_mulaw.cold+0x11/0x7c [ 57.320010] ------------[ cut here ]------------ [ 57.322089] ? mulaw_decode+0x750/0x750 [ 57.322105] ? mulaw_encode+0x780/0x780 [ 57.322118] ? pm_qos_add_request+0x1f1/0x4d0 [ 57.322137] ? snd_pcm_hw_params+0xbf2/0x2250 [ 57.330489] WARNING: CPU: 1 PID: 6489 at sound/core/oss/mulaw.c:332 snd_pcm_plugin_build_mulaw.cold+0x11/0x7c [ 57.337344] snd_pcm_plug_format_plugins+0xb70/0x1360 [ 57.341660] Modules linked in: [ 57.347825] ? snd_pcm_plug_slave_format+0x5a0/0x5a0 [ 57.352578] CPU: 1 PID: 6489 Comm: syz-executor116 Not tainted 4.19.143-syzkaller #0 [ 57.356654] ? snd_pcm_oss_plugin_clear.isra.0+0xd0/0xd0 [ 57.360620] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.365125] snd_pcm_oss_change_params_locked+0x2a88/0x35c0 [ 57.369787] RIP: 0010:snd_pcm_plugin_build_mulaw.cold+0x11/0x7c [ 57.380028] ? snd_pcm_oss_open+0x50/0x50 [ 57.385214] Code: c7 c7 e0 fe 22 88 e8 d9 b6 c1 fb 0f 0b 49 c7 c4 fa ff ff ff e9 df e8 ff ff e8 a7 aa d6 fb 48 c7 c7 e0 fe 22 88 e8 ba b6 c1 fb <0f> 0b 41 bc fa ff ff ff e9 85 fd ff ff e8 89 aa d6 fb 48 c7 c7 e0 [ 57.389395] ? snd_pcm_oss_make_ready+0xc4/0x2e0 [ 57.394616] RSP: 0018:ffff88809588f8c8 EFLAGS: 00010282 [ 57.402563] ? __mutex_add_waiter+0x160/0x160 [ 57.408054] RAX: 0000000000000024 RBX: ffff88809588f9b0 RCX: 0000000000000000 [ 57.417567] ? snd_pcm_oss_sync+0x167/0x800 [ 57.423707] RDX: 0000000000000000 RSI: ffffffff8154d001 RDI: ffffed1012b11f0b [ 57.430219] ? snd_pcm_prepare+0x27b/0x8e0 [ 57.434488] RBP: 1ffff11012b11f1b R08: 0000000000000024 R09: 0000000000000000 [ 57.454529] ? wait_for_completion_io+0x10/0x10 [ 57.459378] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809588f9d0 [ 57.465043] snd_pcm_oss_make_ready+0xe6/0x2e0 [ 57.469528] R13: ffff88809588f9f0 R14: 0000000000000000 R15: ffff88809588f9f0 [ 57.477243] snd_pcm_oss_sync+0x1de/0x800 [ 57.481761] FS: 00000000026b7880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 57.489068] ? snd_pcm_oss_sync+0x800/0x800 [ 57.493454] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.500962] snd_pcm_oss_release+0x26c/0x300 [ 57.506226] CR2: 00000000006cb090 CR3: 00000000946cf000 CR4: 00000000001406e0 [ 57.514465] ? snd_pcm_oss_sync+0x800/0x800 [ 57.519164] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.526631] __fput+0x2ce/0x890 [ 57.530768] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.539004] task_work_run+0x148/0x1c0 [ 57.543311] Call Trace: [ 57.549207] do_exit+0xbb2/0x2b70 [ 57.553710] ? mulaw_decode+0x750/0x750 [ 57.561125] ? lock_downgrade+0x720/0x720 [ 57.565447] ? mulaw_encode+0x780/0x780 [ 57.572721] ? mm_update_next_owner+0x650/0x650 [ 57.575994] ? pm_qos_add_request+0x1f1/0x4d0 [ 57.583405] ? up_read+0x17/0x110 [ 57.587293] ? snd_pcm_hw_params+0xbf2/0x2250 [ 57.589957] ? __do_page_fault+0x1ca/0xde0 [ 57.593539] snd_pcm_plug_format_plugins+0xb70/0x1360 [ 57.597510] do_group_exit+0x125/0x310 [ 57.601658] ? snd_pcm_plug_slave_format+0x5a0/0x5a0 [ 57.605726] __x64_sys_exit_group+0x3a/0x50 [ 57.610618] ? snd_pcm_oss_plugin_clear.isra.0+0xd0/0xd0 [ 57.615290] do_syscall_64+0xf9/0x620 [ 57.618780] snd_pcm_oss_change_params_locked+0x2a88/0x35c0 [ 57.623470] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.627710] ? snd_pcm_oss_open+0x50/0x50 [ 57.632973] RIP: 0033:0x440038 [ 57.636869] ? snd_pcm_oss_make_ready+0xc4/0x2e0 [ 57.642056] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 57.646397] ? __mutex_add_waiter+0x160/0x160 [ 57.652442] RSP: 002b:00007ffec33666f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 57.656246] ? snd_pcm_oss_sync+0x167/0x800 [ 57.662116] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440038 [ 57.667516] ? snd_pcm_prepare+0x27b/0x8e0 [ 57.671741] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 57.674941] ? wait_for_completion_io+0x10/0x10 [ 57.679683] RBP: 00000000004bf870 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 57.698691] snd_pcm_oss_make_ready+0xe6/0x2e0 [ 57.703359] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 57.711074] snd_pcm_oss_sync+0x1de/0x800 [ 57.715509] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 57.722808] ? snd_pcm_oss_sync+0x800/0x800 [ 57.774860] snd_pcm_oss_release+0x26c/0x300 [ 57.779432] ? snd_pcm_oss_sync+0x800/0x800 [ 57.783762] __fput+0x2ce/0x890 [ 57.787087] task_work_run+0x148/0x1c0 [ 57.791197] do_exit+0xbb2/0x2b70 [ 57.795370] ? lock_downgrade+0x720/0x720 [ 57.800032] ? mm_update_next_owner+0x650/0x650 [ 57.804815] ? up_read+0x17/0x110 [ 57.808928] ? __do_page_fault+0x1ca/0xde0 [ 57.813799] do_group_exit+0x125/0x310 [ 57.817711] __x64_sys_exit_group+0x3a/0x50 [ 57.822402] do_syscall_64+0xf9/0x620 [ 57.826243] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.832675] RIP: 0033:0x440038 [ 57.835884] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 57.856073] RSP: 002b:00007ffec33666f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 57.864319] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440038 [ 57.871696] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 57.879179] RBP: 00000000004bf870 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 57.886549] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 57.894328] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 57.901855] irq event stamp: 11282 [ 57.905425] hardirqs last enabled at (11281): [] _raw_spin_unlock_irq+0x24/0x80 [ 57.915087] hardirqs last disabled at (11282): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 57.925316] softirqs last enabled at (9138): [] __do_softirq+0x69a/0x9a0 [ 57.935883] softirqs last disabled at (9117): [] irq_exit+0x215/0x260 [ 57.945514] ---[ end trace 7da57833739bf566 ]--- [ 57.951805] Kernel Offset: disabled [ 57.955586] Rebooting in 86400 seconds..