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BUG: KCSAN: data-race in strscpy / strscpy

write to 0xffff888137909370 of 8 bytes by task 16454 on cpu 0:
 strscpy+0xa9/0x170 lib/string.c:165
 strscpy_pad+0x27/0x80 lib/string_helpers.c:835
 __set_task_comm+0x46/0x140 fs/exec.c:1232
 set_task_comm include/linux/sched.h:1984 [inline]
 __kthread_create_on_node+0x2b2/0x320 kernel/kthread.c:474
 kthread_create_on_node+0x8a/0xb0 kernel/kthread.c:512
 create_worker+0x205/0x330 kernel/workqueue.c:1956
 maybe_create_worker kernel/workqueue.c:2208 [inline]
 manage_workers kernel/workqueue.c:2260 [inline]
 worker_thread+0x2f6/0xa10 kernel/workqueue.c:2509
 kthread+0x1ac/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffff888137909371 of 1 bytes by task 26064 on cpu 1:
 strscpy+0xde/0x170 lib/string.c:174
 ____bpf_get_current_comm kernel/bpf/helpers.c:260 [inline]
 bpf_get_current_comm+0x45/0x70 kernel/bpf/helpers.c:252
 ___bpf_prog_run+0x281/0x3050 kernel/bpf/core.c:1822
 __bpf_prog_run32+0x74/0xa0 kernel/bpf/core.c:2043
 bpf_dispatcher_nop_func include/linux/bpf.h:1124 [inline]
 __bpf_prog_run include/linux/filter.h:601 [inline]
 bpf_prog_run include/linux/filter.h:608 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2263 [inline]
 bpf_trace_run4+0x9f/0x150 kernel/trace/bpf_trace.c:2304
 trace_sched_switch include/trace/events/sched.h:222 [inline]
 __schedule+0x803/0x900 kernel/sched/core.c:6619
 schedule+0x54/0x90 kernel/sched/core.c:6698
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
 kthread+0x12c/0x1e0 kernel/kthread.c:369
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

value changed: 0x74 -> 0x77

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 26064 Comm: kworker/0:1 Not tainted 6.3.0-rc2-syzkaller-00006-gfc89d7fb499b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
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