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

read to 0xffff88810228bb9b of 1 bytes by interrupt 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+0x59/0x140 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+0x153/0x460 kernel/sched/fair.c:1375
 update_curr+0x29/0x210 kernel/sched/fair.c:2001
 enqueue_entity kernel/sched/fair.c:6121 [inline]
 enqueue_task_fair+0x144/0xab0 kernel/sched/fair.c:7857
 enqueue_task kernel/sched/core.c:2184 [inline]
 activate_task kernel/sched/core.c:2224 [inline]
 ttwu_do_activate+0xa7/0x230 kernel/sched/core.c:3824
 ttwu_queue kernel/sched/core.c:4077 [inline]
 try_to_wake_up+0x44a/0x6c0 kernel/sched/core.c:4415
 swake_up_locked kernel/sched/swait.c:30 [inline]
 swake_up_one+0x31/0x70 kernel/sched/swait.c:53
 rcu_gp_kthread_wake kernel/rcu/tree.c:1125 [inline]
 rcu_report_qs_rsp kernel/rcu/tree.c:2350 [inline]
 rcu_report_qs_rnp+0x2cb/0x2e0 kernel/rcu/tree.c:2421
 rcu_report_qs_rdp+0x1bb/0x1d0 kernel/rcu/tree.c:2514
 rcu_check_quiescent_state kernel/rcu/tree.c:2549 [inline]
 rcu_core+0x166/0x9d0 kernel/rcu/tree.c:2882
 rcu_core_si+0xd/0x20 kernel/rcu/tree.c:2914
 handle_softirqs+0xb9/0x280 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x42/0xd0 kernel/softirq.c:735
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0x74/0x80 arch/x86/kernel/apic/apic.c:1062
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
 kcsan_setup_watchpoint+0x3e8/0x450 kernel/kcsan/core.c:705
 rb_wakeups kernel/trace/ring_buffer.c:4294 [inline]
 ring_buffer_unlock_commit+0x54/0x440 kernel/trace/ring_buffer.c:4495
 __buffer_unlock_commit kernel/trace/trace.h:1697 [inline]
 trace_buffer_unlock_commit_regs+0x43/0x310 kernel/trace/trace.c:2049
 trace_event_buffer_commit+0x149/0x590 kernel/trace/trace.c:2024
 do_trace_event_raw_event_sock_msg_length include/trace/events/sock.h:267 [inline]
 trace_event_raw_event_sock_msg_length+0x10f/0x1c0 include/trace/events/sock.h:267
 __do_trace_sock_recv_length include/trace/events/sock.h:304 [inline]
 trace_sock_recv_length include/trace/events/sock.h:304 [inline]
 call_trace_sock_recv_length+0xa2/0xc0 net/socket.c:1120
 sock_recvmsg_nosec+0xdf/0xf0 net/socket.c:1131
 ____sys_recvmsg+0x26f/0x280 net/socket.c:2902
 ___sys_recvmsg+0x11f/0x3a0 net/socket.c:2946
 do_recvmmsg+0x1e5/0x560 net/socket.c:3041
 __sys_recvmmsg net/socket.c:3115 [inline]
 __do_sys_recvmmsg net/socket.c:3138 [inline]
 __se_sys_recvmmsg net/socket.c:3131 [inline]
 __x64_sys_recvmmsg+0xe5/0x170 net/socket.c:3131
 x64_sys_call+0x80f/0x3020 arch/x86/include/generated/asm/syscalls_64.h:300
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff88810228bb9b of 13 bytes by task 24730 on cpu 1:
 __set_task_comm+0x92/0x180 fs/exec.c:1100
 begin_new_exec+0xeb4/0x1210 fs/exec.c:1257
 load_elf_binary+0x64a/0x1a30 fs/binfmt_elf.c:1010
 search_binary_handler fs/exec.c:1694 [inline]
 exec_binprm fs/exec.c:1726 [inline]
 bprm_execve+0x45c/0x9b0 fs/exec.c:1778
 do_execveat_common+0x7a4/0x8a0 fs/exec.c:1876
 __do_sys_execve fs/exec.c:1949 [inline]
 __se_sys_execve fs/exec.c:1943 [inline]
 __x64_sys_execve+0x5f/0x80 fs/exec.c:1943
 x64_sys_call+0x2752/0x3020 arch/x86/include/generated/asm/syscalls_64.h:60
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 24730 Comm: sedpcd-run-hook Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================