================================================================== BUG: KCSAN: data-race in copy_process / release_task write to 0xffffffff8927b410 of 4 bytes by task 24890 on cpu 1: __unhash_process kernel/exit.c:73 [inline] __exit_signal kernel/exit.c:147 [inline] release_task+0x6c8/0xb90 kernel/exit.c:198 exit_notify kernel/exit.c:680 [inline] do_exit+0x1140/0x16e0 kernel/exit.c:826 call_usermodehelper_exec_async+0x2da/0x2e0 kernel/umh.c:125 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 read to 0xffffffff8927b410 of 4 bytes by task 7 on cpu 0: copy_process+0xac4/0x3300 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+0x3e1/0x9a0 kernel/workqueue.c:2269 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415 kthread+0x20d/0x230 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound call_usermodehelper_exec_work ==================================================================