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

write to 0xffff888103c907d8 of 3 bytes by task 15120 on cpu 1:
 __set_task_comm+0x78/0x180 fs/exec.c:1103
 begin_new_exec+0xec6/0x1200 fs/exec.c:1292
 load_elf_binary+0x5e2/0x18f0 fs/binfmt_elf.c:1010
 search_binary_handler fs/exec.c:1777 [inline]
 exec_binprm fs/exec.c:1809 [inline]
 bprm_execve+0x46b/0xa50 fs/exec.c:1865
 do_execveat_common+0x7b5/0x8b0 fs/exec.c:1963
 __do_sys_execve fs/exec.c:2036 [inline]
 __se_sys_execve fs/exec.c:2030 [inline]
 __x64_sys_execve+0x5f/0x80 fs/exec.c:2030
 x64_sys_call+0x1cd2/0x2550 arch/x86/include/generated/asm/syscalls_64.h:60
 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 0xffff888103c907da of 1 bytes by task 4719 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: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
 __pollwake fs/select.c:205 [inline]
 pollwake+0xf6/0x130 fs/select.c:215
 __wake_up_common kernel/sched/wait.c:108 [inline]
 __wake_up_common_lock kernel/sched/wait.c:125 [inline]
 __wake_up_sync_key+0x52/0x80 kernel/sched/wait.c:188
 anon_pipe_write+0xe48/0x1060 fs/pipe.c:671
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x57a/0x990 fs/read_write.c:687
 ksys_write+0xdc/0x1a0 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __x64_sys_write+0x40/0x50 fs/read_write.c:747
 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2
 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: 0x63 -> 0x64

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4719 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
==================================================================