[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.263006][ T26] audit: type=1800 audit(1562011710.426:25): pid=8672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.291861][ T26] audit: type=1800 audit(1562011710.426:26): pid=8672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.319274][ T26] audit: type=1800 audit(1562011710.426:27): pid=8672 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 '10.128.10.32' (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 syzkaller login: [ 102.891967][ C0] WARNING: CPU: 0 PID: 0 at kernel/events/core.c:1835 perf_group_attach+0x3fd/0x4d0 [ 102.901679][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 102.908259][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.2.0-rc3+ #26 [ 102.915434][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.925480][ C0] Call Trace: [ 102.928754][ C0] [ 102.931608][ C0] dump_stack+0x172/0x1f0 [ 102.936120][ C0] ? perf_group_attach+0x3f0/0x4d0 [ 102.941351][ C0] panic+0x2cb/0x744 [ 102.945368][ C0] ? __warn_printk+0xf3/0xf3 [ 102.950020][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 102.955126][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 102.961421][ C0] ? __warn.cold+0x5/0x4d [ 102.965891][ C0] ? __warn+0xe8/0x1d0 [ 102.969974][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 102.975276][ C0] __warn.cold+0x20/0x4d [ 102.979552][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 102.984761][ C0] report_bug+0x263/0x2b0 [ 102.989129][ C0] do_error_trap+0x11b/0x200 [ 102.993974][ C0] do_invalid_op+0x37/0x50 [ 102.998503][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 103.003620][ C0] invalid_op+0x14/0x20 [ 103.007778][ C0] RIP: 0010:perf_group_attach+0x3fd/0x4d0 [ 103.013489][ 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 73 3a eb ff <0f> 0b e9 55 fd ff ff 48 c7 c7 34 c4 80 89 e8 40 e0 23 00 e9 5b fc [ 103.033442][ C0] RSP: 0018:ffff8880ae809ea8 EFLAGS: 00010006 [ 103.039525][ C0] RAX: ffffffff88a7a100 RBX: ffff8880916963c0 RCX: ffffffff818568e8 [ 103.047501][ C0] RDX: 0000000000010000 RSI: ffffffff81856c0d RDI: ffff8880916965d8 [ 103.055557][ C0] RBP: ffff8880ae809ed8 R08: ffffffff88a7a100 R09: ffffffff89bec008 [ 103.063528][ C0] R10: ffffffff89bec010 R11: 0000000000000001 R12: ffff888090f18bc0 [ 103.071487][ C0] R13: ffffe8ffffc14a08 R14: 0000000000000000 R15: ffff8880ae83a5c8 [ 103.079508][ C0] ? perf_group_attach+0xd8/0x4d0 [ 103.084594][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 103.089741][ C0] ? perf_group_attach+0x3fd/0x4d0 [ 103.094887][ C0] __perf_install_in_context+0x4b5/0x960 [ 103.100517][ C0] ? kvm_clock_read+0x18/0x30 [ 103.105820][ C0] ? __perf_event_enable+0x910/0x910 [ 103.111104][ C0] remote_function+0x129/0x1a0 [ 103.116044][ C0] ? debug_smp_processor_id+0x3c/0x280 [ 103.121756][ C0] flush_smp_call_function_queue+0x147/0x4f0 [ 103.128074][ C0] ? perf_duration_warn+0x40/0x40 [ 103.133227][ C0] generic_smp_call_function_single_interrupt+0x13/0x2b [ 103.140261][ C0] smp_call_function_single_interrupt+0x9d/0x450 [ 103.146744][ C0] call_function_single_interrupt+0xf/0x20 [ 103.152545][ C0] [ 103.155476][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 103.160958][ C0] Code: ff ff 48 89 df e8 32 81 8c fa eb 82 e9 07 00 00 00 0f 00 2d 84 24 4b 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 74 24 4b 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 8e f5 41 fa e8 d9 [ 103.180811][ C0] RSP: 0018:ffffffff88a07cf8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04 [ 103.189242][ C0] RAX: 1ffffffff1164e81 RBX: ffffffff88a7a100 RCX: 0000000000000000 [ 103.197202][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff88a7a97c [ 103.205168][ C0] RBP: ffffffff88a07d28 R08: ffffffff88a7a100 R09: 0000000000000000 [ 103.213244][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 103.221202][ C0] R13: ffffffff88b273f8 R14: 0000000000000000 R15: 0000000000000000 [ 103.229438][ C0] ? default_idle+0x4e/0x320 [ 103.234025][ C0] arch_cpu_idle+0xa/0x10 [ 103.238343][ C0] default_idle_call+0x36/0x90 [ 103.243224][ C0] do_idle+0x377/0x560 [ 103.247287][ C0] ? retint_kernel+0x2b/0x2b [ 103.252006][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 103.257031][ C0] cpu_startup_entry+0x1b/0x20 [ 103.261902][ C0] rest_init+0x245/0x37b [ 103.266247][ C0] arch_call_rest_init+0xe/0x1b [ 103.271093][ C0] start_kernel+0x854/0x893 [ 103.275682][ C0] ? mem_encrypt_init+0xb/0xb [ 103.280353][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.286603][ C0] ? x86_family+0x41/0x50 [ 103.290918][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 103.297154][ C0] x86_64_start_reservations+0x29/0x2b [ 103.302707][ C0] x86_64_start_kernel+0x77/0x7b [ 103.308087][ C0] secondary_startup_64+0xa4/0xb0 [ 103.314228][ C0] Kernel Offset: disabled [ 103.318610][ C0] Rebooting in 86400 seconds..