==================================================================
BUG: KCSAN: data-race in do_fcntl / do_fcntl

read-write to 0xffff888134d84648 of 4 bytes by task 22696 on cpu 0:
 setfl fs/fcntl.c:81 [inline]
 do_fcntl+0xde9/0xeb0 fs/fcntl.c:342
 __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

read to 0xffff888134d84648 of 4 bytes by task 22695 on cpu 1:
 setfl fs/fcntl.c:73 [inline]
 do_fcntl+0xc55/0xeb0 fs/fcntl.c:342
 __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: 0x00008001 -> 0x0000c801

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 22695 Comm: syz-executor.2 Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
==================================================================