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

write to 0xffff888103c76f58 of 11 bytes by task 15417 on cpu 1:
 __set_task_comm+0x78/0x180 fs/exec.c:1102
 __do_sys_prctl kernel/sys.c:2608 [inline]
 __se_sys_prctl+0xcb3/0x13b0 kernel/sys.c:2534
 __x64_sys_prctl+0x67/0x80 kernel/sys.c:2534
 x64_sys_call+0x2421/0x2550 arch/x86/include/generated/asm/syscalls_64.h:158
 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 0xffff888103c76f5e of 1 bytes by task 14683 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/0x450 kernel/sched/fair.c:1425
 update_curr+0x1e/0x210 kernel/sched/fair.c:2048
 update_curr_eevdf kernel/sched/fair.c:7980 [inline]
 enqueue_task_fair+0x77/0x850 kernel/sched/fair.c:8010
 enqueue_task kernel/sched/core.c:2194 [inline]
 activate_task kernel/sched/core.c:2234 [inline]
 ttwu_do_activate+0xa7/0x230 kernel/sched/core.c:3847
 ttwu_queue kernel/sched/core.c:4100 [inline]
 try_to_wake_up+0x44f/0x6d0 kernel/sched/core.c:4438
 __queue_work+0x7b6/0xbc0 kernel/workqueue.c:2458
 queue_work_on+0xa9/0x140 kernel/workqueue.c:2501
 queue_work include/linux/workqueue.h:700 [inline]
 fsnotify_put_mark+0x45c/0x560 fs/notify/mark.c:497
 __do_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:796 [inline]
 __se_sys_inotify_rm_watch+0xf0/0x170 fs/notify/inotify/inotify_user.c:774
 __x64_sys_inotify_rm_watch+0x31/0x40 fs/notify/inotify/inotify_user.c:774
 x64_sys_call+0x1f51/0x2550 arch/x86/include/generated/asm/syscalls_64.h:256
 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: 0x65 -> 0x31

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 14683 Comm: udevd Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================