================================================================== BUG: KCSAN: data-race in copy_process / task_dump_owner write to 0xffff88802e5a2024 of 4 bytes by task 23430 on cpu 1: copy_process+0x5b1/0x2dc0 kernel/fork.c:1947 _do_fork+0x14a/0x6c0 kernel/fork.c:2428 __do_sys_clone kernel/fork.c:2545 [inline] __se_sys_clone kernel/fork.c:2529 [inline] __x64_sys_clone+0xc8/0xf0 kernel/fork.c:2529 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88802e5a2024 of 4 bytes by task 23436 on cpu 0: task_dump_owner+0x2b/0x1b0 fs/proc/base.c:1818 pid_update_inode fs/proc/base.c:1960 [inline] pid_revalidate+0x69/0x110 fs/proc/base.c:1983 lookup_fast+0x208/0x370 fs/namei.c:768 walk_component+0x5c/0x350 fs/namei.c:1856 link_path_walk+0x462/0x730 fs/namei.c:2179 path_openat+0x199/0x20a0 fs/namei.c:3364 do_filp_open+0xbd/0x1d0 fs/namei.c:3395 do_sys_openat2+0x33b/0x500 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0xe2/0x110 fs/open.c:1188 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 23436 Comm: syz-executor.5 Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================