[ 95.254845][ T27] audit: type=1800 audit(1580951771.910:27): pid=9695 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 95.279433][ T27] audit: type=1800 audit(1580951771.910:28): pid=9695 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. [ 96.168366][ T27] audit: type=1800 audit(1580951772.950:29): pid=9695 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 [ 96.195277][ T27] audit: type=1800 audit(1580951772.950:30): pid=9695 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 '10.128.0.42' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 104.275330][ C0] hrtimer: interrupt took 46867 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 110.435169][T11388] ------------[ cut here ]------------ [ 110.440992][T11388] ODEBUG: free active (active state 0) object type: work_struct hint: io_ring_file_ref_switch+0x0/0xac0 [ 110.453085][T11388] WARNING: CPU: 1 PID: 11388 at lib/debugobjects.c:485 debug_print_object+0x168/0x250 [ 110.463204][T11388] Kernel panic - not syncing: panic_on_warn set ... [ 110.470365][T11388] CPU: 1 PID: 11388 Comm: syz-executor348 Not tainted 5.5.0-syzkaller #0 [ 110.479444][T11388] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 110.490169][T11388] Call Trace: [ 110.493760][T11388] dump_stack+0x197/0x210 [ 110.498522][T11388] ? debug_print_object+0x100/0x250 [ 110.504021][T11388] panic+0x2e3/0x75c [ 110.508258][T11388] ? add_taint.cold+0x16/0x16 [ 110.513383][T11388] ? __kasan_check_write+0x14/0x20 [ 110.519178][T11388] ? __warn.cold+0x14/0x3e [ 110.523879][T11388] ? __warn+0xd9/0x1cf [ 110.528217][T11388] ? debug_print_object+0x168/0x250 [ 110.534642][T11388] __warn.cold+0x2f/0x3e [ 110.539535][T11388] ? debug_print_object+0x168/0x250 [ 110.545723][T11388] report_bug+0x289/0x300 [ 110.550593][T11388] do_error_trap+0x11b/0x200 [ 110.555425][T11388] do_invalid_op+0x37/0x50 [ 110.560017][T11388] ? debug_print_object+0x168/0x250 [ 110.565266][T11388] invalid_op+0x23/0x30 [ 110.569712][T11388] RIP: 0010:debug_print_object+0x168/0x250 [ 110.575694][T11388] Code: dd 80 84 91 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 80 84 91 88 48 c7 c7 e0 79 91 88 e8 87 e5 a1 fd <0f> 0b 83 05 63 78 01 07 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 110.597087][T11388] RSP: 0018:ffffc9000631f888 EFLAGS: 00010082 [ 110.603348][T11388] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 110.611618][T11388] RDX: 0000000000000000 RSI: ffffffff815e7b16 RDI: fffff52000c63f03 [ 110.620165][T11388] RBP: ffffc9000631f8c8 R08: ffff888095c6e440 R09: ffffed1015d245c9 [ 110.629358][T11388] R10: ffffed1015d245c8 R11: ffff8880ae922e43 R12: 0000000000000001 [ 110.638160][T11388] R13: ffffffff89b79a40 R14: ffffffff814c4610 R15: ffff88809f5b7188 [ 110.649372][T11388] ? __exit_umh+0x2e0/0x2e0 [ 110.654109][T11388] ? vprintk_func+0x86/0x189 [ 110.659127][T11388] ? debug_print_object+0x168/0x250 [ 110.664333][T11388] debug_check_no_obj_freed+0x2d6/0x441 [ 110.670098][T11388] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 110.675972][T11388] kfree+0xf8/0x2c0 [ 110.679937][T11388] io_sqe_files_unregister+0x2e2/0x4d0 [ 110.685671][T11388] io_ring_ctx_wait_and_kill+0x447/0x9b0 [ 110.691307][T11388] ? __sanitizer_cov_trace_cmp1+0x1/0x20 [ 110.697320][T11388] io_uring_release+0x42/0x50 [ 110.702117][T11388] __fput+0x2ff/0x890 [ 110.706487][T11388] ? io_ring_ctx_wait_and_kill+0x9b0/0x9b0 [ 110.712290][T11388] ____fput+0x16/0x20 [ 110.716356][T11388] task_work_run+0x145/0x1c0 [ 110.721091][T11388] do_exit+0xba9/0x2f50 [ 110.725340][T11388] ? get_signal+0x392/0x24f0 [ 110.730100][T11388] ? mm_update_next_owner+0x7c0/0x7c0 [ 110.735677][T11388] ? lock_downgrade+0x920/0x920 [ 110.740625][T11388] ? _raw_spin_unlock_irq+0x23/0x80 [ 110.745953][T11388] ? get_signal+0x392/0x24f0 [ 110.751162][T11388] ? _raw_spin_unlock_irq+0x23/0x80 [ 110.756373][T11388] do_group_exit+0x135/0x360 [ 110.761094][T11388] get_signal+0x47c/0x24f0 [ 110.765614][T11388] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 110.772287][T11388] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 110.778482][T11388] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 110.784647][T11388] do_signal+0x87/0x1700 [ 110.789235][T11388] ? kmem_cache_free+0x26b/0x320 [ 110.794187][T11388] ? getname_flags+0x277/0x5b0 [ 110.799311][T11388] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 110.805759][T11388] ? setup_sigcontext+0x7d0/0x7d0 [ 110.810800][T11388] ? exit_to_usermode_loop+0x43/0x380 [ 110.816421][T11388] ? do_syscall_64+0x676/0x790 [ 110.821358][T11388] ? exit_to_usermode_loop+0x43/0x380 [ 110.827123][T11388] ? lockdep_hardirqs_on+0x421/0x5e0 [ 110.832962][T11388] ? trace_hardirqs_on+0x67/0x240 [ 110.838315][T11388] exit_to_usermode_loop+0x286/0x380 [ 110.843609][T11388] do_syscall_64+0x676/0x790 [ 110.848377][T11388] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 110.854653][T11388] RIP: 0033:0x446a79 [ 110.858825][T11388] 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 [ 110.879043][T11388] RSP: 002b:00007fc231422db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 110.888041][T11388] RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 0000000000446a79 [ 110.896297][T11388] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28 [ 110.904550][T11388] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 110.912535][T11388] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 110.920854][T11388] R13: 00007ffdb6414e3f R14: 00007fc2314239c0 R15: 0000000000000000 [ 110.932338][T11388] Kernel Offset: disabled [ 110.936781][T11388] Rebooting in 86400 seconds..