[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 45.976630][ T26] audit: type=1800 audit(1553034691.790:25): pid=8081 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 46.008246][ T26] audit: type=1800 audit(1553034691.790:26): pid=8081 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 46.049526][ T26] audit: type=1800 audit(1553034691.790:27): pid=8081 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.83' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 99.221459][T12432] WARNING: CPU: 0 PID: 12432 at kernel/events/core.c:1835 perf_group_attach+0x3fd/0x4d0 [ 99.231529][T12432] Kernel panic - not syncing: panic_on_warn set ... [ 99.238105][T12432] CPU: 0 PID: 12432 Comm: syz-executor389 Not tainted 5.1.0-rc1+ #29 [ 99.246152][T12432] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.256369][T12432] Call Trace: [ 99.259657][T12432] dump_stack+0x172/0x1f0 [ 99.263977][T12432] ? perf_group_attach+0x390/0x4d0 [ 99.269144][T12432] panic+0x2cb/0x65c [ 99.273037][T12432] ? __warn_printk+0xf3/0xf3 [ 99.278025][T12432] ? perf_group_attach+0x3fd/0x4d0 [ 99.283128][T12432] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.289497][T12432] ? __warn.cold+0x5/0x45 [ 99.293828][T12432] ? __warn+0xe8/0x1d0 [ 99.298147][T12432] ? perf_group_attach+0x3fd/0x4d0 [ 99.303444][T12432] __warn.cold+0x20/0x45 [ 99.307672][T12432] ? perf_group_attach+0x3fd/0x4d0 [ 99.312776][T12432] report_bug+0x263/0x2b0 [ 99.317099][T12432] do_error_trap+0x11b/0x200 [ 99.321683][T12432] do_invalid_op+0x37/0x50 [ 99.326299][T12432] ? perf_group_attach+0x3fd/0x4d0 [ 99.331403][T12432] invalid_op+0x14/0x20 [ 99.335552][T12432] RIP: 0010:perf_group_attach+0x3fd/0x4d0 [ 99.341391][T12432] 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 23 ba eb ff <0f> 0b e9 55 fd ff ff 48 c7 c7 58 5a 5e 89 e8 20 b6 23 00 e9 5b fc [ 99.360991][T12432] RSP: 0018:ffff888084857a90 EFLAGS: 00010093 [ 99.367043][T12432] RAX: ffff88807f128580 RBX: ffff88809e96ac80 RCX: ffffffff8184b248 [ 99.375139][T12432] RDX: 0000000000000000 RSI: ffffffff8184b56d RDI: ffff88809e96ae98 [ 99.383260][T12432] RBP: ffff888084857ac0 R08: ffff88807f128580 R09: ffffffff899ba008 [ 99.391225][T12432] R10: ffffffff899ba010 R11: 0000000000000001 R12: ffff88808af8eb80 [ 99.399288][T12432] R13: ffffe8ffffc13ed0 R14: 0000000000000000 R15: ffff8880ae832048 [ 99.407353][T12432] ? perf_group_attach+0xd8/0x4d0 [ 99.412407][T12432] ? perf_group_attach+0x3fd/0x4d0 [ 99.417527][T12432] __perf_install_in_context+0x4b5/0x960 [ 99.423160][T12432] ? __perf_event_enable+0x920/0x920 [ 99.428432][T12432] ? perf_duration_warn+0x40/0x40 [ 99.433438][T12432] remote_function+0x12b/0x1a0 [ 99.438198][T12432] generic_exec_single+0x284/0x4b0 [ 99.443300][T12432] smp_call_function_single+0x12d/0x420 [ 99.448832][T12432] ? _raw_spin_unlock+0x2d/0x50 [ 99.453774][T12432] ? perf_duration_warn+0x40/0x40 [ 99.458788][T12432] ? generic_exec_single+0x4b0/0x4b0 [ 99.464066][T12432] ? __do_sys_perf_event_open+0x1a5b/0x24e0 [ 99.470309][T12432] ? xhci_irq.cold+0xa7b/0xfcb [ 99.475062][T12432] perf_install_in_context+0x369/0x3d0 [ 99.480591][T12432] ? list_add_event+0xcd0/0xcd0 [ 99.485432][T12432] ? __perf_event_enable+0x920/0x920 [ 99.490713][T12432] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 99.497003][T12432] __do_sys_perf_event_open+0x1858/0x24e0 [ 99.502724][T12432] ? perf_event_set_output+0x4e0/0x4e0 [ 99.508274][T12432] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 99.513905][T12432] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 99.519352][T12432] ? do_syscall_64+0x26/0x610 [ 99.524055][T12432] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.530109][T12432] ? do_syscall_64+0x26/0x610 [ 99.534775][T12432] __x64_sys_perf_event_open+0xbe/0x150 [ 99.540449][T12432] do_syscall_64+0x103/0x610 [ 99.545055][T12432] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.550995][T12432] RIP: 0033:0x446a99 [ 99.554887][T12432] 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 99.574581][T12432] RSP: 002b:00007f6bf54d5db8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a [ 99.583543][T12432] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446a99 [ 99.591522][T12432] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000020000000 [ 99.599497][T12432] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 99.607522][T12432] R10: 0000000000000003 R11: 0000000000000246 R12: 00000000006dbc2c [ 99.615495][T12432] R13: 00007fff2116246f R14: 00007f6bf54d69c0 R15: 000000000000002d [ 99.624249][T12432] Kernel Offset: disabled [ 99.628654][T12432] Rebooting in 86400 seconds..