debugfs-null-crash.txt

[Fri Jan  1 03:04:30 2021] debugfs: Directory 'systemtap' with parent '/' already present!
[Fri Jan  1 03:04:30 2021] debugfs: Directory 'systemtap_lock' with parent '/' already present!
[Fri Jan  1 03:04:30 2021] BUG: kernel NULL pointer dereference, address: 00000000000000a0
[Fri Jan  1 03:04:30 2021] #PF: supervisor write access in kernel mode
[Fri Jan  1 03:04:30 2021] #PF: error_code(0x0002) - not-present page
[Fri Jan  1 03:04:30 2021] PGD 0 P4D 0 
[Fri Jan  1 03:04:30 2021] Oops: 0002 [#1] PREEMPT SMP NOPTI
[Fri Jan  1 03:04:30 2021] CPU: 2 PID: 11615 Comm: staprun Tainted: G           OE     5.3.0-21-lowlatency #22~18.04.1-Ubuntu
[Fri Jan  1 03:04:30 2021] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[Fri Jan  1 03:04:30 2021] RIP: 0010:down_write+0x10/0x40
[Fri Jan  1 03:04:30 2021] Code: 38 5b 41 5a 41 5c 5d 49 8d 62 f8 c3 31 c0 eb de e8 05 f3 5e ff 90 90 90 90 90 0f 1f 44 00 00 55 31 c0 ba 01 00 00 00 48 89 e5 <f0> 48 0f b1 17 75 0f 65 48 8b 04 25 c0 6b 01 00 5d 48 89 47 08 c3
[Fri Jan  1 03:04:30 2021] RSP: 0018:ffffafe981f8fbb8 EFLAGS: 00010246
[Fri Jan  1 03:04:30 2021] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000003800000000
[Fri Jan  1 03:04:30 2021] RDX: 0000000000000001 RSI: ffffffff853137b0 RDI: 00000000000000a0
[Fri Jan  1 03:04:30 2021] RBP: ffffafe981f8fbb8 R08: 0000000000000000 R09: ffffafe981f8fa80
[Fri Jan  1 03:04:30 2021] R10: ffffffffc08b6b70 R11: 000000000000b697 R12: ffff8ef2a7a059c0
[Fri Jan  1 03:04:30 2021] R13: ffffffffc0a33758 R14: ffffafe981f8fe60 R15: ffffffffc0a33740
[Fri Jan  1 03:04:30 2021] FS:  00007efe80063740(0000) GS:ffff8ef2f3a80000(0000) knlGS:0000000000000000
[Fri Jan  1 03:04:30 2021] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Fri Jan  1 03:04:30 2021] CR2: 00000000000000a0 CR3: 000000033fa6a000 CR4: 0000000000340ee0
[Fri Jan  1 03:04:30 2021] Call Trace:
[Fri Jan  1 03:04:30 2021]  start_creating+0x65/0x150
[Fri Jan  1 03:04:30 2021]  ? _stp_transport_init+0x160/0x160 [orxray_lj_lua_off_fgraph_X_11615]
[Fri Jan  1 03:04:30 2021]  debugfs_create_dir+0x16/0x110
[Fri Jan  1 03:04:30 2021]  ? _stp_transport_init+0x160/0x160 [orxray_lj_lua_off_fgraph_X_11615]
[Fri Jan  1 03:04:30 2021]  _stp_debugfs_transport_fs_init.constprop.92+0x34/0x150 [orxray_lj_lua_off_fgraph_X_11615]
[Fri Jan  1 03:04:30 2021]  _stp_transport_fs_init.constprop.91+0x2c/0x80 [orxray_lj_lua_off_fgraph_X_11615]
[Fri Jan  1 03:04:30 2021]  _stp_transport_init+0x9b/0x160 [orxray_lj_lua_off_fgraph_X_11615]
[Fri Jan  1 03:04:30 2021]  ? _stp_transport_init+0x160/0x160 [orxray_lj_lua_off_fgraph_X_11615]
[Fri Jan  1 03:04:30 2021]  init_module+0x2a/0x30 [orxray_lj_lua_off_fgraph_X_11615]
[Fri Jan  1 03:04:30 2021]  do_one_initcall+0x4a/0x22a
[Fri Jan  1 03:04:30 2021]  ? __vfree+0x22/0x60
[Fri Jan  1 03:04:30 2021]  ? kmem_cache_alloc_trace+0x178/0x230
[Fri Jan  1 03:04:30 2021]  do_init_module+0x5f/0x230
[Fri Jan  1 03:04:30 2021]  load_module+0x1b8c/0x2150
[Fri Jan  1 03:04:30 2021]  ? __schedule+0x2b2/0x690
[Fri Jan  1 03:04:30 2021]  ? preempt_schedule_irq+0x3b/0x60
[Fri Jan  1 03:04:30 2021]  __do_sys_init_module+0x17d/0x1b0
[Fri Jan  1 03:04:30 2021]  ? __do_sys_init_module+0x17d/0x1b0
[Fri Jan  1 03:04:30 2021]  __x64_sys_init_module+0x1a/0x20
[Fri Jan  1 03:04:30 2021]  do_syscall_64+0x5a/0x130
[Fri Jan  1 03:04:30 2021]  entry_SYSCALL_64_after_hwframe+0x44/0xa9