sched trace: Couldn't activate tracepoint probe to kernel_sched_switch
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4066 at kernel/tracepoint.c:407 func_remove kernel/tracepoint.c:-1 [inline]
WARNING: CPU: 0 PID: 4066 at kernel/tracepoint.c:407 tracepoint_remove_func kernel/tracepoint.c:406 [inline]
WARNING: CPU: 0 PID: 4066 at kernel/tracepoint.c:407 tracepoint_probe_unregister+0x175/0x990 kernel/tracepoint.c:554
Modules linked in:
CPU: 0 UID: 0 PID: 4066 Comm: syz.4.1234 Not tainted syzkaller #0 59fd58dbf897e2c8ba33f91efbb53ce34092dff9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:tracepoint_remove_func kernel/tracepoint.c:407 [inline]
RIP: 0010:tracepoint_probe_unregister+0x175/0x990 kernel/tracepoint.c:554
Code: 4c 8b 23 4d 85 e4 74 29 e8 48 c9 fe ff 41 ff c6 4d 39 ec 0f 85 56 ff ff ff e9 65 ff ff ff e8 32 c9 fe ff 49 c7 c4 fe ff ff ff <0f> 0b e9 02 07 00 00 44 89 f7 44 89 fe e8 d9 ca fe ff 45 29 fe 75
RSP: 0018:ffffc9000eaafb10 EFLAGS: 00010293
RAX: ffffffff8188b13e RBX: dffffc0000000000 RCX: ffff88811662df00
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffc9000eaafa80
RBP: ffffc9000eaafb70 R08: ffffc9000eaafa87 R09: 1ffff92001d55f50
R10: dffffc0000000000 R11: fffff52001d55f51 R12: fffffffffffffffe
R13: ffffffff818f3a00 R14: ffffffff87e5a148 R15: ffffffff87e5a100
FS:  00007f624ec016c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001b00 CR3: 000000011f428000 CR4: 00000000003526b0
DR0: 000000000000000c DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unregister_trace_sched_switch include/trace/events/sched.h:222 [inline]
 tracing_sched_unregister kernel/trace/trace_sched_switch.c:87 [inline]
 tracing_stop_sched_switch kernel/trace/trace_sched_switch.c:129 [inline]
 tracing_stop_cmdline_record+0x6f/0xb0 kernel/trace/trace_sched_switch.c:140
 __ftrace_event_enable_disable+0x632/0x7a0 kernel/trace/trace_events.c:853
 ftrace_event_enable_disable kernel/trace/trace_events.c:880 [inline]
 event_enable_write+0x1ca/0x290 kernel/trace/trace_events.c:1587
 vfs_write+0x3c1/0xfd0 fs/read_write.c:682
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f624dd9e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f624ec01028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f624e025fa0 RCX: 00007f624dd9e159
RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000005
RBP: 00007f624ec01090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f624e026038 R14: 00007f624e025fa0 R15: 00007fff9ac39088
 </TASK>
---[ end trace 0000000000000000 ]---
event trace: Could not enable event p