[  139.181887] BUG: kernel NULL pointer dereference, address: 00000016

[  139.183713] Oops: Oops: 0000 [#1] PREEMPT SMP

------------[ cut here ]------------
[  139.157977] WARNING: CPU: 0 PID: 2261 at kernel/trace/ftrace.c:378 __unregister_ftrace_function+0x8c/0x9c
[  139.159620] Modules linked in: fuse configfs [last unloaded: trace_events_sample]
[  139.160471] CPU: 0 UID: 0 PID: 2261 Comm: ftracetest Not tainted 6.13.12-rc1 #1
[  139.160721] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  139.161341] EIP: __unregister_ftrace_function+0x8c/0x9c
[  139.161969] Code: ef 2e 8d b4 26 00 00 00 00 90 81 7b 04 c0 07 d8 cb b8 a8 07 d8 cb 75 ca ba c0 07 d8 cb 89 15 a8 07 d8 cb eb c2 2e 8d 74 26 00 <0f> 0b b8 f0 ff ff ff c3 b8 ff ff ff ff eb be 90 a2 a8 8f c5 cb c3
[  139.163476] EAX: c219c90c EBX: c219c90c ECX: 00000000 EDX: c19b0b80
[  139.164402] ESI: c219c90c EDI: c219c90c EBP: c3405d70 ESP: c3405d50
[  139.164932] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010246
[  139.165438] CR0: 80050033 CR2: b7792890 CR3: 02470000 CR4: 000006d0
[  139.166186] Call Trace:
[  139.166931]  ? unregister_ftrace_function+0x29/0x12c
[  139.167542]  ? preempt_count_sub+0x54/0x78
[  139.168485]  unregister_fprobe+0x42/0x74
[  139.169248]  trace_fprobe_release+0xbf/0x18c
[  139.169588]  ? selinux_file_open+0x98/0xe0
[  139.169877]  dyn_events_release_all+0x92/0x100
[  139.170347]  dyn_event_open+0x37/0x40
[  139.170805]  do_dentry_open+0x139/0x41c
[  139.171033]  ? dyn_events_release_all+0x100/0x100
[  139.171306]  vfs_open+0x2a/0xe0
[  139.171527]  ? may_open+0x84/0x17c
[  139.171932]  path_openat+0x6ea/0x1058
[  139.172235]  ? __call_rcu_common.constprop.0+0x106/0x394
[  139.172647]  ? trace_preempt_on+0x1e/0x64
[  139.173111]  ? disable_trace_fprobe+0x57/0x104
[  139.173414]  do_filp_open+0xc4/0x184
[  139.173677]  do_sys_openat2+0xb5/0xe4
[  139.174035]  __ia32_sys_openat+0x66/0xb0
[  139.174180]  ia32_sys_call+0x1c46/0x286c
[  139.174340]  __do_fast_syscall_32+0x4c/0xc8
[  139.174677]  do_fast_syscall_32+0x2b/0x60
[  139.175067]  do_SYSENTER_32+0x15/0x18
[  139.175331]  entry_SYSENTER_32+0xa6/0x115
[  139.175722] EIP: 0xb7f90579
[  139.177349] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
[  139.178439] EAX: ffffffda EBX: ffffff9c ECX: 0126951c EDX: 00008241
[  139.179447] ESI: 000001b6 EDI: 00000000 EBP: 00000000 ESP: bfaf5640
[  139.179956] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246
[  139.180623] ---[ end trace 0000000000000000 ]---

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