[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 74.029185][ T26] audit: type=1800 audit(1561019821.045:25): pid=9205 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 74.123221][ T26] audit: type=1800 audit(1561019821.055:26): pid=9205 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 74.166519][ T26] audit: type=1800 audit(1561019821.055:27): pid=9205 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 '10.128.0.160' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 85.722565][ T9361] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 90.254688][ T9505] WARNING: CPU: 0 PID: 9505 at kernel/events/core.c:1835 perf_group_attach+0x3fd/0x4d0 [ 90.267681][ T9505] Kernel panic - not syncing: panic_on_warn set ... [ 90.283572][ T9505] CPU: 0 PID: 9505 Comm: syz-executor655 Not tainted 5.2.0-rc3+ #21 [ 90.293039][ T9505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.306193][ T9505] Call Trace: [ 90.312724][ T9505] dump_stack+0x172/0x1f0 [ 90.328950][ T9505] ? perf_group_attach+0x3b0/0x4d0 [ 90.335409][ T9505] panic+0x2cb/0x744 [ 90.340253][ T9505] ? __warn_printk+0xf3/0xf3 [ 90.346709][ T9505] ? perf_group_attach+0x3fd/0x4d0 [ 90.354198][ T9505] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 90.362519][ T9505] ? __warn.cold+0x5/0x4d [ 90.366957][ T9505] ? __warn+0xe8/0x1d0 [ 90.373672][ T9505] ? perf_group_attach+0x3fd/0x4d0 [ 90.383536][ T9505] __warn.cold+0x20/0x4d [ 90.388796][ T9505] ? perf_group_attach+0x3fd/0x4d0 [ 90.395966][ T9505] report_bug+0x263/0x2b0 [ 90.400802][ T9505] do_error_trap+0x11b/0x200 [ 90.405750][ T9505] do_invalid_op+0x37/0x50 [ 90.413199][ T9505] ? perf_group_attach+0x3fd/0x4d0 [ 90.420732][ T9505] invalid_op+0x14/0x20 [ 90.428497][ T9505] RIP: 0010:perf_group_attach+0x3fd/0x4d0 [ 90.434237][ T9505] 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 33 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 [ 90.503719][ T9505] RSP: 0018:ffff88808bac7a90 EFLAGS: 00010093 [ 90.510785][ T9505] RAX: ffff88809441e6c0 RBX: ffff8880a0f4ab80 RCX: ffffffff81856928 [ 90.523643][ T9505] RDX: 0000000000000000 RSI: ffffffff81856c4d RDI: ffff8880a0f4ad98 [ 90.532900][ T9505] RBP: ffff88808bac7ac0 R08: ffff88809441e6c0 R09: ffffed1011758f48 [ 90.541249][ T9505] R10: ffffed1011758f47 R11: 0000000000000003 R12: ffff8880a0f4b400 [ 90.550817][ T9505] R13: ffffe8ffffc14a08 R14: 0000000000000000 R15: ffff8880ae83a5c8 [ 90.560782][ T9505] ? perf_group_attach+0xd8/0x4d0 [ 90.566179][ T9505] ? perf_group_attach+0x3fd/0x4d0 [ 90.571703][ T9505] __perf_install_in_context+0x4b5/0x960 [ 90.577508][ T9505] ? __perf_event_enable+0x910/0x910 [ 90.583514][ T9505] ? perf_duration_warn+0x40/0x40 [ 90.589102][ T9505] remote_function+0x129/0x1a0 [ 90.594349][ T9505] generic_exec_single+0x27c/0x4a0 [ 90.601173][ T9505] smp_call_function_single+0x12d/0x420 [ 90.609458][ T9505] ? _raw_spin_unlock+0x2d/0x50 [ 90.632280][ T9505] ? perf_duration_warn+0x40/0x40 [ 90.640924][ T9505] ? generic_exec_single+0x4a0/0x4a0 [ 90.648438][ T9505] ? __do_sys_perf_event_open+0x1a41/0x24d0 [ 90.656982][ T9505] perf_install_in_context+0x369/0x3d0 [ 90.665597][ T9505] ? list_add_event+0xec0/0xec0 [ 90.674225][ T9505] ? __perf_event_enable+0x910/0x910 [ 90.682793][ T9505] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 90.689069][ T9505] __do_sys_perf_event_open+0x183e/0x24d0 [ 90.695009][ T9505] ? perf_event_set_output+0x4e0/0x4e0 [ 90.700593][ T9505] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 90.706260][ T9505] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 90.711886][ T9505] ? do_syscall_64+0x26/0x680 [ 90.716860][ T9505] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 90.723570][ T9505] ? do_syscall_64+0x26/0x680 [ 90.728804][ T9505] __x64_sys_perf_event_open+0xbe/0x150 [ 90.734819][ T9505] do_syscall_64+0xfd/0x680 [ 90.740949][ T9505] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 90.747836][ T9505] RIP: 0033:0x447399 [ 90.751924][ T9505] Code: e8 4c bb 02 00 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 90.784914][ T9505] RSP: 002b:00007fb640e5edb8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a [ 90.793873][ T9505] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000447399 [ 90.802225][ T9505] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000020000000 [ 90.810482][ T9505] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 90.818750][ T9505] R10: 0000000000000003 R11: 0000000000000246 R12: 00000000006dcc2c [ 90.828676][ T9505] R13: 00007ffcb3b6bc9f R14: 00007fb640e5f9c0 R15: 20c49ba5e353f7cf [ 90.846175][ T9505] Kernel Offset: disabled [ 90.853814][ T9505] Rebooting in 86400 seconds..