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BUG: KCSAN: data-race in __set_task_comm / strlen

write to 0xffff888105a22a58 of 13 bytes by task 18015 on cpu 0:
 __set_task_comm+0x78/0x180 fs/exec.c:1103
 io_wq_worker+0x140/0xc80 io_uring/io-wq.c:756
 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 0xffff888105a22a58 of 1 bytes by task 18013 on cpu 1:
 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:1368
 update_curr+0x1e/0x210 kernel/sched/fair.c:2182
 update_curr_eevdf kernel/sched/fair.c:8150 [inline]
 enqueue_task_fair+0x77/0x850 kernel/sched/fair.c:8180
 enqueue_task kernel/sched/core.c:2197 [inline]
 activate_task kernel/sched/core.c:2237 [inline]
 ttwu_do_activate+0xa7/0x230 kernel/sched/core.c:3897
 ttwu_queue kernel/sched/core.c:4150 [inline]
 try_to_wake_up+0x3f1/0x660 kernel/sched/core.c:4488
 __queue_work+0x7fb/0xd10 kernel/workqueue.c:2556
 queue_work_on+0xa9/0x140 kernel/workqueue.c:2599
 queue_work include/linux/workqueue.h:700 [inline]
 io_ring_ctx_wait_and_kill+0x18d/0x1d0 io_uring/io_uring.c:2694
 io_uring_release+0x2c/0x40 io_uring/io_uring.c:2702
 __fput+0x286/0x610 fs/file_table.c:512
 fput_close_sync+0xad/0x190 fs/file_table.c:618
 filp_close_sync+0x27/0x40 fs/open.c:1573
 __range_close fs/file.c:919 [inline]
 __do_sys_close_range fs/file.c:1003 [inline]
 __se_sys_close_range+0x915/0xa00 fs/file.c:954
 __x64_sys_close_range+0x43/0x50 fs/file.c:954
 x64_sys_call+0x2198/0x2550 arch/x86/include/generated/asm/syscalls_64.h:437
 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: 0x73 -> 0x69

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 18013 Comm: syz.3.4030 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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