==================================================================
BUG: KCSAN: data-race in copy_process / task_dump_owner

write to 0xffff88812c0440ac of 4 bytes by task 8058 on cpu 1:
 copy_process+0x608/0x2e00 kernel/fork.c:1986
 kernel_clone+0x14b/0x680 kernel/fork.c:2503
 __do_sys_clone kernel/fork.c:2620 [inline]
 __se_sys_clone kernel/fork.c:2604 [inline]
 __x64_sys_clone+0xb4/0xe0 kernel/fork.c:2604
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88812c0440ac of 4 bytes by task 8063 on cpu 0:
 task_dump_owner+0x2b/0x1d0 fs/proc/base.c:1822
 pid_update_inode fs/proc/base.c:1964 [inline]
 pid_revalidate+0x69/0x110 fs/proc/base.c:1987
 lookup_fast+0x1fd/0x350 fs/namei.c:827
 walk_component+0x5c/0x350 fs/namei.c:1938
 lookup_last fs/namei.c:2397 [inline]
 path_lookupat+0x12d/0x570 fs/namei.c:2421
 filename_lookup+0xff/0x390 fs/namei.c:2454
 kern_path+0x2e/0x40 fs/namei.c:2541
 create_local_trace_uprobe+0x3f/0x3c0 kernel/trace/trace_uprobe.c:1592
 perf_uprobe_init+0xbe/0x140 kernel/trace/trace_event_perf.c:323
 perf_uprobe_event_init+0xde/0x140 kernel/events/core.c:9875
 perf_try_init_event+0x21a/0x400 kernel/events/core.c:11192
 perf_init_event kernel/events/core.c:11256 [inline]
 perf_event_alloc+0xa60/0x1790 kernel/events/core.c:11547
 __do_sys_perf_event_open kernel/events/core.c:12036 [inline]
 __se_sys_perf_event_open+0x5c7/0x2740 kernel/events/core.c:11928
 __x64_sys_perf_event_open+0x63/0x70 kernel/events/core.c:11928
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8063 Comm: syz-executor.2 Not tainted 5.13.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================