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BUG: KCSAN: data-race in do_fcntl / do_fcntl

write to 0xffff8881314a3d6c of 4 bytes by task 25632 on cpu 1:
 do_fcntl+0x777/0xeb0 fs/fcntl.c:399
 __do_sys_fcntl fs/fcntl.c:456 [inline]
 __se_sys_fcntl+0xc4/0x180 fs/fcntl.c:441
 __x64_sys_fcntl+0x43/0x50 fs/fcntl.c:441
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to 0xffff8881314a3d6c of 4 bytes by task 25633 on cpu 0:
 do_fcntl+0x777/0xeb0 fs/fcntl.c:399
 __do_sys_fcntl fs/fcntl.c:456 [inline]
 __se_sys_fcntl+0xc4/0x180 fs/fcntl.c:441
 __x64_sys_fcntl+0x43/0x50 fs/fcntl.c:441
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x00000000 -> 0x00000012

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25633 Comm: syz-executor.4 Tainted: G        W          6.8.0-rc3-syzkaller-00279-g4a7bbe7519b6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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