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BUG: KCSAN: data-race in __set_task_comm / strlen

write to 0xffff888100bb2a60 of 8 bytes by task 32564 on cpu 1:
 __set_task_comm+0x92/0x180 fs/exec.c:1104
 begin_new_exec+0xee8/0x12b0 fs/exec.c:1297
 load_elf_binary+0x5e2/0x18f0 fs/binfmt_elf.c:1010
 search_binary_handler fs/exec.c:1779 [inline]
 exec_binprm fs/exec.c:1811 [inline]
 bprm_execve+0x46b/0xa50 fs/exec.c:1867
 kernel_execve+0x5e0/0x630 fs/exec.c:2011
 call_usermodehelper_exec_async+0x196/0x250 kernel/umh.c:107
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888100bb2a60 of 1 bytes by task 16 on cpu 0:
 strlen+0x19/0x40 lib/string.c:402
 __fortify_strlen include/linux/fortify-string.h:218 [inline]
 trace_event_get_offsets_sched_stat_runtime include/trace/events/sched.h:560 [inline]
 do_trace_event_raw_event_sched_stat_runtime include/trace/events/sched.h:553 [inline]
 trace_event_raw_event_sched_stat_runtime+0x5a/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+0x14f/0x3b0 kernel/sched/fair.c:1425
 update_curr+0x1e/0x210 kernel/sched/fair.c:2239
 update_curr_eevdf kernel/sched/fair.c:8196 [inline]
 __dequeue_task+0x5a/0x840 kernel/sched/fair.c:8348
 detach_task+0x37/0x80 kernel/sched/fair.c:11256
 detach_tasks kernel/sched/fair.c:11396 [inline]
 sched_balance_rq+0x1b37/0x2450 kernel/sched/fair.c:13806
 sched_balance_newidle kernel/sched/fair.c:14936 [inline]
 pick_task_fair+0x2d7/0x4e0 kernel/sched/fair.c:10297
 __pick_next_task kernel/sched/core.c:6173 [inline]
 pick_next_task kernel/sched/core.c:6724 [inline]
 __schedule+0x379/0xd20 kernel/sched/core.c:7199
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x5b/0xa0 kernel/sched/core.c:7376
 schedule_timeout+0xca/0x180 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x287/0xa10 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x28/0x1d0 kernel/rcu/tree.c:2330
 kthread+0x223/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x75 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 16 Comm: rcu_preempt Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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