================================================================== BUG: KCSAN: data-race in get_cpu_iowait_time_us / tick_nohz_idle_enter write to 0xffff88812c11f184 of 1 bytes by task 0 on cpu 1: tick_nohz_idle_enter+0x96/0x120 kernel/time/tick-sched.c:1024 do_idle+0x36/0x310 kernel/sched/idle.c:251 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:372 start_secondary+0xe3/0x110 arch/x86/kernel/smpboot.c:268 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 read to 0xffff88812c11f184 of 1 bytes by task 26638 on cpu 0: get_cpu_iowait_time_us+0x6b/0x1f0 kernel/time/tick-sched.c:632 get_iowait_time fs/proc/stat.c:69 [inline] show_stat+0x2bf/0xd10 fs/proc/stat.c:132 seq_read+0x2ee/0x900 fs/seq_file.c:208 pde_read fs/proc/inode.c:306 [inline] proc_reg_read+0xde/0x1a0 fs/proc/inode.c:316 do_loop_readv_writev fs/read_write.c:715 [inline] do_iter_read+0x3f5/0x480 fs/read_write.c:936 vfs_readv fs/read_write.c:1054 [inline] do_preadv+0x13b/0x230 fs/read_write.c:1146 __do_sys_preadv fs/read_write.c:1196 [inline] __se_sys_preadv fs/read_write.c:1191 [inline] __x64_sys_preadv+0x54/0x60 fs/read_write.c:1191 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 26638 Comm: syz-executor.0 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================