==================================================================
BUG: KCSAN: data-race in fifo_open / wait_for_partner

read-write to 0xffff88813b18a2ac of 4 bytes by task 13100 on cpu 1:
 fifo_open+0x9c/0x5d0 fs/pipe.c:1104
 do_dentry_open+0x521/0x850 fs/open.c:848
 vfs_open+0x43/0x50 fs/open.c:981
 do_open fs/namei.c:3520 [inline]
 path_openat+0x16cf/0x1b30 fs/namei.c:3653
 do_filp_open+0x105/0x220 fs/namei.c:3680
 do_sys_openat2+0xb5/0x2a0 fs/open.c:1278
 do_sys_open fs/open.c:1294 [inline]
 __do_sys_creat fs/open.c:1370 [inline]
 __se_sys_creat fs/open.c:1364 [inline]
 __x64_sys_creat+0x62/0x80 fs/open.c:1364
 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 0xffff88813b18a2ac of 4 bytes by task 13106 on cpu 0:
 pipe_unlock fs/pipe.c:96 [inline]
 wait_for_partner+0x98/0x1d0 fs/pipe.c:1078
 fifo_open+0x4c8/0x5d0 fs/pipe.c:1169
 do_dentry_open+0x521/0x850 fs/open.c:848
 vfs_open+0x43/0x50 fs/open.c:981
 do_open fs/namei.c:3520 [inline]
 path_openat+0x16cf/0x1b30 fs/namei.c:3653
 do_filp_open+0x105/0x220 fs/namei.c:3680
 file_open_name+0xf2/0x120 fs/open.c:1223
 acct_on kernel/acct.c:226 [inline]
 __do_sys_acct kernel/acct.c:305 [inline]
 __se_sys_acct+0xec/0x420 kernel/acct.c:292
 __x64_sys_acct+0x1b/0x20 kernel/acct.c:292
 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 -> 0x00000002

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 13106 Comm: syz-executor.0 Not tainted 5.19.0-rc8-syzkaller-00017-g39c3c396f813-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
==================================================================