[ 33.854164] audit: type=1800 audit(1552282138.234:27): pid=7449 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 33.886209] audit: type=1800 audit(1552282138.264:28): pid=7449 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. [ 34.415187] audit: type=1800 audit(1552282138.794:29): pid=7449 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 [ 34.434636] audit: type=1800 audit(1552282138.794:30): pid=7449 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 Warning: Permanently added '10.128.0.170' (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 syzkaller login: [ 48.590940] WARNING: CPU: 0 PID: 8021 at kernel/events/core.c:1833 perf_group_attach+0x3fd/0x4d0 [ 48.600027] Kernel panic - not syncing: panic_on_warn set ... [ 48.605920] CPU: 0 PID: 8021 Comm: syz-executor335 Not tainted 5.0.0+ #9 [ 48.612773] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.622119] Call Trace: [ 48.624719] [ 48.626872] dump_stack+0x172/0x1f0 [ 48.630512] ? perf_group_attach+0x300/0x4d0 [ 48.634941] panic+0x2cb/0x65c [ 48.638134] ? __warn_printk+0xf3/0xf3 [ 48.642023] ? perf_group_attach+0x3fd/0x4d0 [ 48.646430] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.651967] ? __warn.cold+0x5/0x45 [ 48.655589] ? __warn+0xe8/0x1d0 [ 48.658960] ? perf_group_attach+0x3fd/0x4d0 [ 48.663365] __warn.cold+0x20/0x45 [ 48.666911] ? perf_group_attach+0x3fd/0x4d0 [ 48.671321] report_bug+0x263/0x2b0 [ 48.674953] do_error_trap+0x11b/0x200 [ 48.678843] do_invalid_op+0x37/0x50 [ 48.682558] ? perf_group_attach+0x3fd/0x4d0 [ 48.686987] invalid_op+0x14/0x20 [ 48.690442] RIP: 0010:perf_group_attach+0x3fd/0x4d0 [ 48.695461] 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 c0 eb ff <0f> 0b e9 55 fd ff ff 48 c7 c7 18 f7 5c 89 e8 20 59 23 00 e9 5b fc [ 48.714356] RSP: 0018:ffff8880ae807ea8 EFLAGS: 00010006 [ 48.719714] RAX: ffff8880866661c0 RBX: ffff8880a9bb0500 RCX: ffffffff8183f2d8 [ 48.726979] RDX: 0000000000010000 RSI: ffffffff8183f5fd RDI: ffff8880a9bb0718 [ 48.734244] RBP: ffff8880ae807ed8 R08: ffff8880866661c0 R09: ffffffff8999c008 [ 48.741586] R10: ffffffff8999c010 R11: 0000000000000001 R12: ffff88808662c400 [ 48.748891] R13: ffffe8ffffc12f88 R14: 0000000000000000 R15: ffff8880ae832048 [ 48.756182] ? perf_group_attach+0xd8/0x4d0 [ 48.760487] ? perf_group_attach+0x3fd/0x4d0 [ 48.764880] ? perf_group_attach+0x3fd/0x4d0 [ 48.769291] __perf_install_in_context+0x4b5/0x960 [ 48.774219] ? kvm_clock_read+0x18/0x30 [ 48.778180] ? __perf_event_enable+0x920/0x920 [ 48.782746] remote_function+0x12b/0x1a0 [ 48.786807] flush_smp_call_function_queue+0x14a/0x500 [ 48.792073] ? perf_duration_warn+0x40/0x40 [ 48.796394] generic_smp_call_function_single_interrupt+0x13/0x2b [ 48.802626] smp_call_function_single_interrupt+0xa3/0x460 [ 48.808236] call_function_single_interrupt+0xf/0x20 [ 48.813313] [ 48.815533] RIP: 0010:generic_exec_single+0x329/0x4b0 [ 48.820760] Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 68 01 00 00 48 83 3d d7 4d 2d 07 00 0f 84 e0 00 00 00 e8 4c 81 0a 00 48 89 df 57 9d <0f> 1f 44 00 00 45 31 ed e9 37 fe ff ff e8 35 81 0a 00 0f 0b e9 34 [ 48.839672] RSP: 0018:ffff88808a107aa0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff04 [ 48.847380] RAX: ffff8880866661c0 RBX: 0000000000000293 RCX: 1ffff11010cccd4c [ 48.854644] RDX: 0000000000000000 RSI: ffffffff81653524 RDI: 0000000000000293 [ 48.862000] RBP: ffff88808a107ad0 R08: ffff8880866661c0 R09: ffff888086666a60 [ 48.869257] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000200 [ 48.876509] R13: ffff88808a107b20 R14: ffff88808a107c58 R15: ffffffff81840590 [ 48.883865] ? perf_duration_warn+0x40/0x40 [ 48.888227] ? generic_exec_single+0x324/0x4b0 [ 48.892806] smp_call_function_single+0x12d/0x420 [ 48.897639] ? perf_duration_warn+0x40/0x40 [ 48.901948] ? generic_exec_single+0x4b0/0x4b0 [ 48.906523] event_function_call+0x40f/0x480 [ 48.910930] ? event_sched_out.isra.0+0xad0/0xad0 [ 48.915759] ? task_function_call+0x180/0x180 [ 48.920239] ? event_sched_out.isra.0+0xad0/0xad0 [ 48.925065] ? perf_swevent_get_recursion_context+0x170/0x170 [ 48.930985] perf_remove_from_context+0xa2/0x1d0 [ 48.935764] perf_event_release_kernel+0x173/0xbf0 [ 48.940712] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.946345] ? put_event+0x60/0x60 [ 48.949876] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 48.955406] ? perf_event_release_kernel+0xbf0/0xbf0 [ 48.960500] perf_release+0x37/0x50 [ 48.964124] __fput+0x2df/0x8d0 [ 48.967393] ____fput+0x16/0x20 [ 48.970656] task_work_run+0x14a/0x1c0 [ 48.974530] exit_to_usermode_loop+0x273/0x2c0 [ 48.979098] do_syscall_64+0x52d/0x610 [ 48.982986] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.988269] RIP: 0033:0x4078c1 [ 48.991486] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 b4 17 00 00 c3 48 83 ec 08 e8 6a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 b3 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 49.010383] RSP: 002b:00007ffe83e1e600 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 49.018078] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00000000004078c1 [ 49.025335] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 49.032587] RBP: 0000000000000040 R08: 0000000000000000 R09: 0000000000000000 [ 49.039886] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006ddc20 [ 49.047153] R13: 0000000000000000 R14: 00000000006ddc2c R15: 0000000000000003 [ 49.055195] Kernel Offset: disabled [ 49.058886] Rebooting in 86400 seconds..