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BUG: KCSAN: data-race in fifo_open / wait_for_partner

read-write to 0xffff88816db15d2c of 4 bytes by task 10442 on cpu 0:
 fifo_open+0xa0/0x5e0 fs/pipe.c:1109
 do_dentry_open+0x5cd/0xaf0 fs/open.c:914
 vfs_open+0x4a/0x50 fs/open.c:1048
 do_open fs/namei.c:3636 [inline]
 path_openat+0x17f2/0x1d10 fs/namei.c:3793
 do_filp_open+0xf6/0x200 fs/namei.c:3820
 do_sys_openat2+0xab/0x110 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_open fs/open.c:1430 [inline]
 __se_sys_open fs/open.c:1426 [inline]
 __x64_sys_open+0xe6/0x110 fs/open.c:1426
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88816db15d2c of 4 bytes by task 10452 on cpu 1:
 pipe_unlock fs/pipe.c:96 [inline]
 wait_for_partner+0xc6/0x1d0 fs/pipe.c:1083
 fifo_open+0x483/0x5e0 fs/pipe.c:1153
 do_dentry_open+0x5cd/0xaf0 fs/open.c:914
 vfs_open+0x4a/0x50 fs/open.c:1048
 do_open fs/namei.c:3636 [inline]
 path_openat+0x17f2/0x1d10 fs/namei.c:3793
 do_filp_open+0xf6/0x200 fs/namei.c:3820
 do_sys_openat2+0xab/0x110 fs/open.c:1407
 __do_sys_openat2 fs/open.c:1463 [inline]
 __se_sys_openat2+0x17d/0x1c0 fs/open.c:1441
 __x64_sys_openat2+0x55/0x60 fs/open.c:1441
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000001 -> 0x00000002

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10452 Comm: syz-executor.5 Tainted: G        W          6.5.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
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