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BUG: KCSAN: data-race in bprm_execve / copy_fs

write to 0xffff888101b9d4d0 of 4 bytes by task 28506 on cpu 0:
 bprm_execve+0x48d/0x4e0 fs/exec.c:1867
 do_execveat_common+0x853/0x960 fs/exec.c:1949
 do_execve fs/exec.c:2023 [inline]
 __do_sys_execve fs/exec.c:2099 [inline]
 __se_sys_execve fs/exec.c:2094 [inline]
 __x64_sys_execve+0x56/0x70 fs/exec.c:2094
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888101b9d4d0 of 4 bytes by task 28503 on cpu 1:
 copy_fs+0x95/0xf0 kernel/fork.c:1593
 copy_process+0xd83/0x2140 kernel/fork.c:2248
 kernel_clone+0x163/0x5c0 kernel/fork.c:2674
 __do_sys_clone kernel/fork.c:2808 [inline]
 __se_sys_clone kernel/fork.c:2792 [inline]
 __x64_sys_clone+0xc3/0xf0 kernel/fork.c:2792
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 28503 Comm: syz-executor.0 Not tainted 6.0.0-rc5-syzkaller-00025-g3245cb65fd91-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
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