==================================================================
BUG: KCSAN: data-race in __set_task_comm / strlen

write to 0xffff88811a57ea78 of 8 bytes by task 6902 on cpu 1:
 __set_task_comm+0x4d/0x140 fs/exec.c:1088
 begin_new_exec+0xebe/0x1170 fs/exec.c:1246
 load_elf_binary+0x62b/0x1a20 fs/binfmt_elf.c:1010
 search_binary_handler fs/exec.c:1670 [inline]
 exec_binprm fs/exec.c:1702 [inline]
 bprm_execve+0x477/0x970 fs/exec.c:1754
 kernel_execve+0x617/0x660 fs/exec.c:1920
 call_usermodehelper_exec_async+0x197/0x250 kernel/umh.c:109
 ret_from_fork+0x122/0x1b0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff88811a57ea79 of 1 bytes by task 10 on cpu 0:
 strlen+0x19/0x40 lib/string.c:420
 __fortify_strlen include/linux/fortify-string.h:268 [inline]
 trace_event_get_offsets_sched_stat_runtime include/trace/events/sched.h:553 [inline]
 do_perf_trace_sched_stat_runtime include/trace/events/sched.h:553 [inline]
 perf_trace_sched_stat_runtime+0x3c/0x150 include/trace/events/sched.h:553
 __do_trace_sched_stat_runtime include/trace/events/sched.h:576 [inline]
 trace_sched_stat_runtime include/trace/events/sched.h:576 [inline]
 update_se+0x129/0x140 kernel/sched/fair.c:1175
 update_curr+0x2c/0x1b0 kernel/sched/fair.c:1223
 enqueue_entity kernel/sched/fair.c:5250 [inline]
 enqueue_task_fair+0x146/0x980 kernel/sched/fair.c:6966
 enqueue_task kernel/sched/core.c:2092 [inline]
 activate_task+0x59/0xb0 kernel/sched/core.c:2134
 ttwu_do_activate+0x69/0x210 kernel/sched/core.c:3706
 ttwu_queue kernel/sched/core.c:3969 [inline]
 try_to_wake_up+0x37f/0x630 kernel/sched/core.c:4293
 kthread_insert_work+0x104/0x1f0 kernel/kthread.c:1169
 kthread_queue_work+0x78/0xa0 kernel/kthread.c:1192
 synchronize_rcu_expedited_queue_work kernel/rcu/tree_exp.h:498 [inline]
 synchronize_rcu_expedited+0x587/0x790 kernel/rcu/tree_exp.h:967
 synchronize_rcu+0x45/0x320 kernel/rcu/tree.c:3352
 xfrm_state_gc_task+0x96/0x4a0 net/xfrm/xfrm_state.c:631
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3346
 worker_thread+0x582/0x770 kernel/workqueue.c:3427
 kthread+0x489/0x510 kernel/kthread.c:463
 ret_from_fork+0x122/0x1b0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x77 -> 0x6f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events xfrm_state_gc_task
==================================================================