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BUG: KCSAN: data-race in bprm_execve / copy_fs

write to 0xffff888103398b90 of 4 bytes by task 12465 on cpu 1:
 bprm_execve+0x48d/0x4e0 fs/exec.c:1860
 do_execveat_common+0x843/0x950 fs/exec.c:1942
 do_execveat fs/exec.c:2027 [inline]
 __do_sys_execveat fs/exec.c:2101 [inline]
 __se_sys_execveat fs/exec.c:2095 [inline]
 __x64_sys_execveat+0x71/0x80 fs/exec.c:2095
 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 0xffff888103398b90 of 4 bytes by task 12457 on cpu 0:
 copy_fs+0x95/0xf0 kernel/fork.c:1591
 copy_process+0xd4f/0x2100 kernel/fork.c:2244
 kernel_clone+0x166/0x550 kernel/fork.c:2671
 __do_sys_clone kernel/fork.c:2812 [inline]
 __se_sys_clone kernel/fork.c:2796 [inline]
 __x64_sys_clone+0xc3/0xf0 kernel/fork.c:2796
 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: 0 PID: 12457 Comm: syz-executor.5 Not tainted 6.1.0-rc5-syzkaller-00015-g81e7cfa3a9eb-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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