[ 33.930270] audit: type=1800 audit(1550383307.940:28): pid=7391 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 34.605138] audit: type=1800 audit(1550383308.680:29): pid=7391 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 [ 34.627673] audit: type=1800 audit(1550383308.680:30): pid=7391 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.44' (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 syzkaller login: [ 49.493357] WARNING: CPU: 0 PID: 7930 at kernel/events/core.c:1833 perf_group_attach+0x3fd/0x4d0 [ 49.502374] Kernel panic - not syncing: panic_on_warn set ... [ 49.508646] CPU: 0 PID: 7930 Comm: syz-executor314 Not tainted 5.0.0-rc6+ #75 [ 49.515900] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.525356] Call Trace: [ 49.527937] dump_stack+0x172/0x1f0 [ 49.531560] ? perf_group_attach+0x340/0x4d0 [ 49.535955] panic+0x2cb/0x65c [ 49.539146] ? __warn_printk+0xf3/0xf3 [ 49.543039] ? perf_group_attach+0x3fd/0x4d0 [ 49.547434] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.552957] ? __warn.cold+0x5/0x45 [ 49.556588] ? __warn+0xe8/0x1d0 [ 49.559951] ? perf_group_attach+0x3fd/0x4d0 [ 49.564347] __warn.cold+0x20/0x45 [ 49.567887] ? perf_group_attach+0x3fd/0x4d0 [ 49.572279] report_bug+0x263/0x2b0 [ 49.575890] do_error_trap+0x11b/0x200 [ 49.579765] do_invalid_op+0x37/0x50 [ 49.583470] ? perf_group_attach+0x3fd/0x4d0 [ 49.587930] invalid_op+0x14/0x20 [ 49.591372] RIP: 0010:perf_group_attach+0x3fd/0x4d0 [ 49.596369] 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 53 56 ec ff <0f> 0b e9 55 fd ff ff 48 c7 c7 f8 a7 5c 89 e8 60 54 23 00 e9 5b fc [ 49.615260] RSP: 0018:ffff88808d85fa90 EFLAGS: 00010093 [ 49.620609] RAX: ffff88809314e180 RBX: ffff888089afb340 RCX: ffffffff81838798 [ 49.627931] RDX: 0000000000000000 RSI: ffffffff81838abd RDI: ffff888089afb558 [ 49.635195] RBP: ffff88808d85fac0 R08: ffff88809314e180 R09: ffffffff89997008 [ 49.642461] R10: ffffffff89997010 R11: 0000000000000001 R12: ffff888092473240 [ 49.649715] R13: ffffe8ffffc12f80 R14: 0000000000000000 R15: ffff8880ae832048 [ 49.656984] ? perf_group_attach+0xd8/0x4d0 [ 49.661288] ? perf_group_attach+0x3fd/0x4d0 [ 49.665683] __perf_install_in_context+0x4b5/0x960 [ 49.670610] ? __perf_event_enable+0x920/0x920 [ 49.675201] ? perf_duration_warn+0x40/0x40 [ 49.679529] remote_function+0x12b/0x1a0 [ 49.683588] generic_exec_single+0x284/0x4b0 [ 49.687986] smp_call_function_single+0x12d/0x420 [ 49.692815] ? perf_duration_warn+0x40/0x40 [ 49.697216] ? generic_exec_single+0x4b0/0x4b0 [ 49.701795] perf_install_in_context+0x369/0x3d0 [ 49.706545] ? list_add_event+0xcd0/0xcd0 [ 49.710677] ? __perf_event_enable+0x920/0x920 [ 49.715256] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.720780] __do_sys_perf_event_open+0x18fa/0x2690 [ 49.725797] ? perf_event_set_output+0x4e0/0x4e0 [ 49.730544] ? find_held_lock+0x35/0x130 [ 49.734600] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 49.739342] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 49.744094] ? do_syscall_64+0x26/0x610 [ 49.748054] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.753403] ? do_syscall_64+0x26/0x610 [ 49.757369] __x64_sys_perf_event_open+0xbe/0x150 [ 49.762381] do_syscall_64+0x103/0x610 [ 49.766282] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.771460] RIP: 0033:0x448b09 [ 49.774638] Code: e8 dc e6 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 4b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 49.793539] RSP: 002b:00007f297d314ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a [ 49.801232] RAX: ffffffffffffffda RBX: 00000000006dec38 RCX: 0000000000448b09 [ 49.808484] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000020000000 [ 49.815743] RBP: 00000000006dec30 R08: 0000000000000000 R09: 0000000000000000 [ 49.823074] R10: 0000000000000003 R11: 0000000000000246 R12: 00000000006dec3c [ 49.830339] R13: 00007ffee799c18f R14: 00007f297d3159c0 R15: 20c49ba5e353f7cf [ 49.838719] Kernel Offset: disabled [ 49.842401] Rebooting in 86400 seconds..