[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.553709] kauditd_printk_skb: 7 callbacks suppressed [ 29.553720] audit: type=1800 audit(1543846279.559:29): pid=5890 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.579113] audit: type=1800 audit(1543846279.559:30): pid=5890 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.369436] sshd (6029) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.10.59' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 104.975055] WARNING: CPU: 0 PID: 8424 at kernel/events/core.c:1833 perf_group_attach+0x4c1/0x5a0 [ 104.984105] Kernel panic - not syncing: panic_on_warn set ... [ 104.989981] CPU: 0 PID: 8424 Comm: syz-executor988 Not tainted 4.20.0-rc4+ #164 [ 104.997413] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.006851] Call Trace: [ 105.009450] dump_stack+0x244/0x39d [ 105.013070] ? dump_stack_print_info.cold.1+0x20/0x20 [ 105.018273] panic+0x2ad/0x55c [ 105.021504] ? add_taint.cold.5+0x16/0x16 [ 105.025662] ? __warn.cold.8+0x5/0x45 [ 105.029465] ? __warn+0xe8/0x1d0 [ 105.032824] ? perf_group_attach+0x4c1/0x5a0 [ 105.037216] __warn.cold.8+0x20/0x45 [ 105.041078] ? rcu_softirq_qs+0x20/0x20 [ 105.045107] ? perf_group_attach+0x4c1/0x5a0 [ 105.049509] report_bug+0x254/0x2d0 [ 105.053242] do_error_trap+0x11b/0x200 [ 105.057123] do_invalid_op+0x36/0x40 [ 105.060828] ? perf_group_attach+0x4c1/0x5a0 [ 105.065232] invalid_op+0x14/0x20 [ 105.068670] RIP: 0010:perf_group_attach+0x4c1/0x5a0 [ 105.073675] Code: 8d 7c 24 10 48 89 f8 48 c1 e8 03 42 80 3c 30 00 75 51 4d 8b 64 24 10 49 83 ec 10 4c 39 e3 75 d2 e9 f8 fe ff ff e8 3f 81 e9 ff <0f> 0b e9 e0 fc ff ff e8 83 00 2d 00 e9 ea fb ff ff e8 79 00 2d 00 [ 105.092674] RSP: 0018:ffff8881bb4475f8 EFLAGS: 00010093 [ 105.098060] RAX: ffff8881bc1d0140 RBX: ffff8881bb897180 RCX: ffffffff81960616 [ 105.105309] RDX: 0000000000000000 RSI: ffffffff819609b1 RDI: ffff8881bb617418 [ 105.112560] RBP: ffff8881bb447690 R08: ffff8881bc1d0140 R09: 0000000000000006 [ 105.119812] R10: fffffbfff14a7401 R11: 0000000000000001 R12: ffff8881bb617200 [ 105.127062] R13: 1ffff11037688ec1 R14: ffffe8ffffc12c98 R15: 0000000000000000 [ 105.134328] ? perf_group_attach+0x126/0x5a0 [ 105.138718] ? perf_group_attach+0x4c1/0x5a0 [ 105.143175] ? perf_group_attach+0x4c1/0x5a0 [ 105.147618] ? perf_mux_hrtimer_restart+0x270/0x270 [ 105.152625] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.158145] ? ctx_sched_out+0x169/0xa20 [ 105.162207] __perf_install_in_context+0x5bd/0xb70 [ 105.167138] ? __perf_event_enable+0x910/0x910 [ 105.171724] ? trace_hardirqs_off+0xb8/0x310 [ 105.176275] ? debug_mutex_wake_waiter+0x630/0x630 [ 105.181192] ? mutex_destroy+0x200/0x200 [ 105.185257] ? smp_call_function_single+0x25a/0x660 [ 105.190271] ? trace_hardirqs_on+0x310/0x310 [ 105.194673] ? __perf_event_enable+0x910/0x910 [ 105.199241] ? perf_duration_warn+0x40/0x40 [ 105.203556] remote_function+0x12b/0x1a0 [ 105.207615] generic_exec_single+0x379/0x5f0 [ 105.212061] ? smp_call_on_cpu+0x560/0x560 [ 105.216285] ? mutex_trylock+0x2b0/0x2b0 [ 105.220332] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.225855] ? check_preemption_disabled+0x48/0x280 [ 105.230857] smp_call_function_single+0x25a/0x660 [ 105.235684] ? perf_duration_warn+0x40/0x40 [ 105.239995] ? check_preemption_disabled+0x48/0x280 [ 105.245002] ? generic_exec_single+0x5f0/0x5f0 [ 105.249575] ? errseq_sample+0xe5/0x130 [ 105.253543] ? _copy_to_user+0x110/0x110 [ 105.257596] ? __lock_is_held+0xb5/0x140 [ 105.261648] perf_install_in_context+0x46c/0x510 [ 105.266390] ? list_add_event+0x1250/0x1250 [ 105.270700] ? __perf_event_enable+0x910/0x910 [ 105.275267] ? perf_pin_task_context+0x130/0x130 [ 105.280018] ? get_unused_fd_flags+0x122/0x1a0 [ 105.284709] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 105.290232] ? __perf_event_header_size.isra.38+0x15f/0x1b0 [ 105.295929] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 105.301452] __do_sys_perf_event_open+0x1fa5/0x3020 [ 105.306464] ? perf_event_set_output+0x650/0x650 [ 105.311206] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 105.316118] ? kasan_check_read+0x11/0x20 [ 105.320249] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 105.325510] ? rcu_softirq_qs+0x20/0x20 [ 105.329610] ? trace_hardirqs_off_caller+0x310/0x310 [ 105.334703] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 105.340229] ? up_read+0x225/0x2c0 [ 105.343758] ? __x64_sys_futex+0x47f/0x6a0 [ 105.347995] ? do_syscall_64+0x9a/0x820 [ 105.351958] ? do_syscall_64+0x9a/0x820 [ 105.355916] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 105.360482] ? trace_hardirqs_on+0xbd/0x310 [ 105.364789] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.370163] ? trace_hardirqs_off_caller+0x310/0x310 [ 105.375253] __x64_sys_perf_event_open+0xbe/0x150 [ 105.380087] do_syscall_64+0x1b9/0x820 [ 105.383961] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 105.389310] ? syscall_return_slowpath+0x5e0/0x5e0 [ 105.394221] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 105.399046] ? trace_hardirqs_on_caller+0x310/0x310 [ 105.404045] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 105.409050] ? prepare_exit_to_usermode+0x291/0x3b0 [ 105.414067] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 105.418897] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.424067] RIP: 0033:0x446619 [ 105.427242] Code: e8 0c 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 7b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 105.446131] RSP: 002b:00007f6a45e47db8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a [ 105.453826] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446619 [ 105.461080] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000020000000 [ 105.468499] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 105.475751] R10: 0000000000000003 R11: 0000000000000246 R12: 00000000006dbc2c [ 105.483001] R13: 00007ffde149b19f R14: 00007f6a45e489c0 R15: 00000000006dbc20 [ 105.491436] Kernel Offset: disabled [ 105.495116] Rebooting in 86400 seconds..