[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 53.273245][ T24] audit: type=1800 audit(1562015089.783:25): pid=8230 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 53.317030][ T24] audit: type=1800 audit(1562015089.783:26): pid=8230 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 53.352186][ T24] audit: type=1800 audit(1562015089.793:27): pid=8230 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 '10.128.0.88' (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 syzkaller login: [ 73.968217][ C0] WARNING: CPU: 0 PID: 8390 at kernel/events/core.c:1835 perf_group_attach+0x3fd/0x4d0 [ 73.978120][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 73.984749][ C0] CPU: 0 PID: 8390 Comm: syz-executor972 Not tainted 5.2.0-rc7 #46 [ 73.992635][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.002683][ C0] Call Trace: [ 74.005947][ C0] [ 74.008799][ C0] dump_stack+0x172/0x1f0 [ 74.013263][ C0] ? perf_group_attach+0x380/0x4d0 [ 74.018368][ C0] panic+0x2cb/0x744 [ 74.022243][ C0] ? __warn_printk+0xf3/0xf3 [ 74.026819][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 74.031930][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.039556][ C0] ? __warn.cold+0x5/0x4d [ 74.043871][ C0] ? __warn+0xe8/0x1d0 [ 74.048100][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 74.053479][ C0] __warn.cold+0x20/0x4d [ 74.057715][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 74.062828][ C0] report_bug+0x263/0x2b0 [ 74.067150][ C0] do_error_trap+0x11b/0x200 [ 74.071738][ C0] do_invalid_op+0x37/0x50 [ 74.076287][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 74.081397][ C0] invalid_op+0x14/0x20 [ 74.085539][ C0] RIP: 0010:perf_group_attach+0x3fd/0x4d0 [ 74.091239][ 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 c3 39 eb ff <0f> 0b e9 55 fd ff ff 48 c7 c7 74 c6 80 89 e8 70 e7 23 00 e9 5b fc [ 74.110935][ C0] RSP: 0018:ffff8880ae809ea8 EFLAGS: 00010006 [ 74.116992][ C0] RAX: ffff8880a80be540 RBX: ffff88809ec1b280 RCX: ffffffff81858658 [ 74.124960][ C0] RDX: 0000000000010000 RSI: ffffffff8185897d RDI: ffff88809ec1b498 [ 74.133041][ C0] RBP: ffff8880ae809ed8 R08: ffff8880a80be540 R09: ffffffff89bec008 [ 74.141098][ C0] R10: ffffffff89bec010 R11: 0000000000000001 R12: ffff88809e89c940 [ 74.149060][ C0] R13: ffffe8ffffc14fc0 R14: 0000000000000000 R15: ffff8880ae83a5c8 [ 74.157206][ C0] ? perf_group_attach+0xd8/0x4d0 [ 74.162210][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 74.167416][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 74.172518][ C0] __perf_install_in_context+0x4b5/0x960 [ 74.178128][ C0] ? kvm_clock_read+0x18/0x30 [ 74.182982][ C0] ? __perf_event_enable+0x910/0x910 [ 74.188403][ C0] remote_function+0x129/0x1a0 [ 74.193159][ C0] ? debug_smp_processor_id+0x3c/0x280 [ 74.198614][ C0] flush_smp_call_function_queue+0x147/0x4f0 [ 74.204591][ C0] ? perf_duration_warn+0x40/0x40 [ 74.209618][ C0] generic_smp_call_function_single_interrupt+0x13/0x2b [ 74.216546][ C0] smp_call_function_single_interrupt+0x9d/0x450 [ 74.223018][ C0] call_function_single_interrupt+0xf/0x20 [ 74.228831][ C0] [ 74.231882][ C0] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 [ 74.238271][ C0] Code: c0 40 74 b2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 85 1c 95 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 22 36 30 fa 65 8b 05 b3 a5 e4 78 85 c0 74 06 41 [ 74.258132][ C0] RSP: 0018:ffff8880a7c6fb20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04 [ 74.266638][ C0] RAX: 1ffffffff1164e88 RBX: ffff8880a80be540 RCX: 0000000000000000 [ 74.274727][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a80bedbc [ 74.282800][ C0] RBP: ffff8880a7c6fb28 R08: ffff8880a80be540 R09: 0000000000000000 [ 74.290755][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae8354c0 [ 74.298879][ C0] R13: ffff8880a98b2280 R14: ffff88808bffb100 R15: 0000000000000402 [ 74.306957][ C0] finish_task_switch+0x146/0x730 [ 74.311977][ C0] ? finish_task_switch+0x118/0x730 [ 74.317166][ C0] __schedule+0x7d3/0x1560 [ 74.321582][ C0] ? __sched_text_start+0x8/0x8 [ 74.326431][ C0] ? __hrtimer_get_remaining+0x1a0/0x1a0 [ 74.332059][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 74.337330][ C0] schedule+0xa8/0x260 [ 74.341382][ C0] do_nanosleep+0x201/0x690 [ 74.345968][ C0] ? __debug_object_init+0x190/0xc30 [ 74.351277][ C0] ? schedule_timeout_idle+0x90/0x90 [ 74.356551][ C0] ? memset+0x32/0x40 [ 74.360526][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.366877][ C0] ? __hrtimer_init+0xe1/0x250 [ 74.371638][ C0] hrtimer_nanosleep+0x2a6/0x570 [ 74.376602][ C0] ? nanosleep_copyout+0x110/0x110 [ 74.381702][ C0] ? clock_was_set_work+0x30/0x30 [ 74.386727][ C0] __x64_sys_nanosleep+0x1a6/0x220 [ 74.391818][ C0] ? hrtimer_nanosleep+0x570/0x570 [ 74.397172][ C0] ? do_syscall_64+0x26/0x680 [ 74.401835][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 74.407116][ C0] ? trace_hardirqs_on+0x67/0x220 [ 74.412239][ C0] do_syscall_64+0xfd/0x680 [ 74.416749][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.422765][ C0] RIP: 0033:0x4471f0 [ 74.426654][ 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 01 ce 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 [ 74.446556][ C0] RSP: 002b:00007ffcf39ce828 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 74.455181][ C0] RAX: ffffffffffffffda RBX: 00007ffcf39ce860 RCX: 00000000004471f0 [ 74.463166][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffcf39ce830 [ 74.471399][ C0] RBP: 0000000000002538 R08: 00000000000020c6 R09: 0000555556449940 [ 74.479468][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000011fd4 [ 74.487641][ C0] R13: 0000000000409670 R14: 0000000000000000 R15: 0000000000000000 [ 74.497289][ C0] Kernel Offset: disabled [ 74.501679][ C0] Rebooting in 86400 seconds..