================================================================== BUG: KCSAN: data-race in copy_process / copy_process write to 0xffffffff89281410 of 4 bytes by task 14955 on cpu 0: copy_process+0x2e53/0x32b0 kernel/fork.c:2298 _do_fork+0xf1/0x660 kernel/fork.c:2443 __do_sys_clone kernel/fork.c:2599 [inline] __se_sys_clone kernel/fork.c:2580 [inline] __x64_sys_clone+0xfb/0x120 kernel/fork.c:2580 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffffff89281410 of 4 bytes by task 12761 on cpu 1: copy_process+0xab5/0x32b0 kernel/fork.c:1980 _do_fork+0xf1/0x660 kernel/fork.c:2443 kernel_thread+0x85/0xb0 kernel/fork.c:2531 call_usermodehelper_exec_work+0x4f/0x1b0 kernel/umh.c:195 process_one_work+0x3cb/0x990 kernel/workqueue.c:2269 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415 kthread+0x210/0x220 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 12761 Comm: kworker/u4:5 Not tainted 5.8.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound call_usermodehelper_exec_work ==================================================================