==================================================================
BUG: KCSAN: data-race in pipe_wait / put_pipe_info

read to 0xffff8881017daf4c of 4 bytes by task 8175 on cpu 0:
 pipe_lock_nested fs/pipe.c:62 [inline]
 pipe_lock fs/pipe.c:71 [inline]
 pipe_wait+0xd7/0x140 fs/pipe.c:119
 wait_for_partner+0x65/0xc0 fs/pipe.c:886
 fifo_open+0x4d6/0x6b0 fs/pipe.c:974
 do_dentry_open+0x2f4/0x8f0 fs/open.c:797
 vfs_open+0x62/0x80 fs/open.c:914
 do_last fs/namei.c:3408 [inline]
 path_openat+0xf75/0x36e0 fs/namei.c:3525
 do_filp_open+0x11e/0x1b0 fs/namei.c:3555
 do_sys_open+0x3b3/0x4f0 fs/open.c:1097
 ksys_open include/linux/syscalls.h:1385 [inline]
 __do_sys_creat fs/open.c:1155 [inline]
 __se_sys_creat fs/open.c:1153 [inline]
 __x64_sys_creat+0x45/0x60 fs/open.c:1153
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8881017daf4c of 4 bytes by task 8174 on cpu 1:
 put_pipe_info+0x4d/0xb0 fs/pipe.c:575
 fifo_open+0x14e/0x6b0 fs/pipe.c:1019
 do_dentry_open+0x2f4/0x8f0 fs/open.c:797
 vfs_open+0x62/0x80 fs/open.c:914
 do_last fs/namei.c:3408 [inline]
 path_openat+0xf75/0x36e0 fs/namei.c:3525
 do_filp_open+0x11e/0x1b0 fs/namei.c:3555
 do_sys_open+0x3b3/0x4f0 fs/open.c:1097
 ksys_open include/linux/syscalls.h:1385 [inline]
 __do_sys_creat fs/open.c:1155 [inline]
 __se_sys_creat fs/open.c:1153 [inline]
 __x64_sys_creat+0x45/0x60 fs/open.c:1153
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8174 Comm: syz-executor.4 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================