[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.346257][ T26] audit: type=1800 audit(1562011765.634:25): pid=8808 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.388631][ T26] audit: type=1800 audit(1562011765.644:26): pid=8808 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.424317][ T26] audit: type=1800 audit(1562011765.644:27): pid=8808 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.55' (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 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 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 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 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 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 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 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 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 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 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: [ 82.938930][ C0] WARNING: CPU: 0 PID: 8962 at kernel/events/core.c:1835 perf_group_attach+0x3fd/0x4d0 [ 82.948712][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 82.955400][ C0] CPU: 0 PID: 8962 Comm: syz-executor182 Not tainted 5.2.0-rc5+ #32 [ 82.963383][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.973455][ C0] Call Trace: [ 82.976752][ C0] [ 82.979627][ C0] dump_stack+0x172/0x1f0 [ 82.983964][ C0] ? perf_group_attach+0x360/0x4d0 [ 82.989341][ C0] panic+0x2cb/0x744 [ 82.993245][ C0] ? __warn_printk+0xf3/0xf3 [ 82.997853][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 83.002975][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.009311][ C0] ? __warn.cold+0x5/0x4d [ 83.013645][ C0] ? __warn+0xe8/0x1d0 [ 83.017738][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 83.022864][ C0] __warn.cold+0x20/0x4d [ 83.027114][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 83.032234][ C0] report_bug+0x263/0x2b0 [ 83.036571][ C0] do_error_trap+0x11b/0x200 [ 83.041165][ C0] do_invalid_op+0x37/0x50 [ 83.045583][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 83.050693][ C0] invalid_op+0x14/0x20 [ 83.054857][ C0] RIP: 0010:perf_group_attach+0x3fd/0x4d0 [ 83.060581][ C0] Code: ff 48 8d 7b 10 48 89 f8 48 c1 e8 03 42 80 3c 28 00 75 57 48 8b 5b 10 48 83 eb 10 49 39 dc 75 d4 e9 20 ff ff ff e8 e3 6b ea ff <0f> 0b e9 55 fd ff ff 48 c7 c7 f4 1b a1 89 e8 00 e6 23 00 e9 5b fc [ 83.080188][ C0] RSP: 0018:ffff8880ae809ea8 EFLAGS: 00010006 [ 83.086258][ C0] RAX: ffff8880a95841c0 RBX: ffff88809fc62a00 RCX: ffffffff81865378 [ 83.094236][ C0] RDX: 0000000000010000 RSI: ffffffff8186569d RDI: ffff88809fc62c18 [ 83.102210][ C0] RBP: ffff8880ae809ed8 R08: ffff8880a95841c0 R09: ffffffff89df3008 [ 83.110180][ C0] R10: ffffffff89df3010 R11: 0000000000000001 R12: ffff8880a87dc9c0 [ 83.118152][ C0] R13: ffffe8ffffc15018 R14: 0000000000000000 R15: ffff8880ae83a648 [ 83.126154][ C0] ? perf_group_attach+0xd8/0x4d0 [ 83.131210][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 83.136414][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 83.141533][ C0] __perf_install_in_context+0x4b5/0x960 [ 83.147169][ C0] ? kvm_clock_read+0x18/0x30 [ 83.151853][ C0] ? __perf_event_enable+0x910/0x910 [ 83.157158][ C0] remote_function+0x129/0x1a0 [ 83.161924][ C0] ? debug_smp_processor_id+0x3c/0x280 [ 83.167384][ C0] flush_smp_call_function_queue+0x147/0x4f0 [ 83.173362][ C0] ? perf_duration_warn+0x40/0x40 [ 83.178391][ C0] generic_smp_call_function_single_interrupt+0x13/0x2b [ 83.185329][ C0] smp_call_function_single_interrupt+0x9d/0x450 [ 83.191660][ C0] call_function_single_interrupt+0xf/0x20 [ 83.197461][ C0] [ 83.200405][ C0] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 [ 83.206220][ C0] Code: c0 00 74 d2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d e5 99 b1 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 b2 b1 2c fa 65 8b 05 53 23 e1 78 85 c0 74 06 41 [ 83.225952][ C0] RSP: 0018:ffff88808e0bfb20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04 [ 83.234377][ C0] RAX: 1ffffffff11a4e80 RBX: ffff8880a95841c0 RCX: 0000000000000000 [ 83.242344][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a9584a3c [ 83.250309][ C0] RBP: ffff88808e0bfb28 R08: ffff8880a95841c0 R09: 0000000000000000 [ 83.258285][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae835540 [ 83.266255][ C0] R13: ffff888086fdc000 R14: 0000000000000000 R15: 0000000000000001 [ 83.274257][ C0] finish_task_switch+0x146/0x730 [ 83.279287][ C0] ? finish_task_switch+0x118/0x730 [ 83.284512][ C0] __schedule+0x7d3/0x1560 [ 83.288941][ C0] ? __sched_text_start+0x8/0x8 [ 83.293795][ C0] ? __hrtimer_get_remaining+0x1a0/0x1a0 [ 83.299425][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 83.304730][ C0] schedule+0xa8/0x260 [ 83.308824][ C0] do_nanosleep+0x201/0x690 [ 83.313334][ C0] ? __debug_object_init+0x190/0xc30 [ 83.318626][ C0] ? schedule_timeout_idle+0x90/0x90 [ 83.323915][ C0] ? memset+0x32/0x40 [ 83.327899][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.334147][ C0] ? __hrtimer_init+0xe1/0x250 [ 83.338910][ C0] hrtimer_nanosleep+0x2a6/0x570 [ 83.343847][ C0] ? nanosleep_copyout+0x110/0x110 [ 83.348956][ C0] ? clock_was_set_work+0x30/0x30 [ 83.353999][ C0] __x64_sys_nanosleep+0x1a6/0x220 [ 83.359117][ C0] ? hrtimer_nanosleep+0x570/0x570 [ 83.364231][ C0] ? do_syscall_64+0x26/0x680 [ 83.368929][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 83.374216][ C0] ? trace_hardirqs_on+0x67/0x220 [ 83.379245][ C0] do_syscall_64+0xfd/0x680 [ 83.384015][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.389903][ C0] RIP: 0033:0x445240 [ 83.393801][ C0] Code: c0 5b 5d c3 66 0f 1f 44 00 00 8b 04 24 48 83 c4 18 5b 5d c3 66 0f 1f 44 00 00 83 3d b1 cd 29 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 64 1f fc ff c3 48 83 ec 08 e8 9a 42 00 00 [ 83.413410][ C0] RSP: 002b:00007ffffad0ae18 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 83.421841][ C0] RAX: ffffffffffffffda RBX: 00000000000028b6 RCX: 0000000000445240 [ 83.429821][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffffad0ae20 [ 83.437798][ C0] RBP: 0000000000014331 R08: 0000000000002302 R09: 0000555555e79880 [ 83.445864][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000407630 [ 83.453846][ C0] R13: 00000000004076c0 R14: 0000000000000000 R15: 0000000000000000 [ 83.463197][ C0] Kernel Offset: disabled [ 83.467657][ C0] Rebooting in 86400 seconds..