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BUG: KCSAN: data-race in probe_sched_switch / tracing_stop_cmdline_record

read-write to 0xffffffff895fc1e0 of 4 bytes by task 3638 on cpu 0:
 tracing_stop_sched_switch kernel/trace/trace_sched_switch.c:120 [inline]
 tracing_stop_cmdline_record+0x28/0xc0 kernel/trace/trace_sched_switch.c:140
 trace_event_enable_cmd_record+0xa7/0x100 kernel/trace/trace_events.c:783
 set_tracer_flag+0x352/0x540 kernel/trace/trace.c:4031
 trace_options_core_write+0xf2/0x180 kernel/trace/trace.c:7865
 vfs_write+0x254/0x9a0 fs/read_write.c:685
 ksys_write+0xdc/0x1a0 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __x64_sys_write+0x40/0x50 fs/read_write.c:747
 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff895fc1e0 of 4 bytes by task 3646 on cpu 1:
 probe_sched_switch+0x46/0xa0 kernel/trace/trace_sched_switch.c:32
 __do_trace_sched_switch include/trace/events/sched.h:220 [inline]
 trace_sched_switch include/trace/events/sched.h:220 [inline]
 __schedule+0xc34/0xd20 kernel/sched/core.c:7281
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x5b/0xa0 kernel/sched/core.c:7376
 futex_do_wait kernel/futex/waitwake.c:387 [inline]
 __futex_wait+0x121/0x260 kernel/futex/waitwake.c:722
 futex_wait+0x98/0x1c0 kernel/futex/waitwake.c:750
 do_futex+0x391/0x460 kernel/futex/syscalls.c:133
 __do_sys_futex kernel/futex/syscalls.c:210 [inline]
 __se_sys_futex+0x2f6/0x370 kernel/futex/syscalls.c:191
 __x64_sys_futex+0x78/0x90 kernel/futex/syscalls.c:191
 x64_sys_call+0x22e2/0x2550 arch/x86/include/generated/asm/syscalls_64.h:203
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3646 Comm: syz-executor315 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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