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BUG: KCSAN: data-race in pipe_wait / put_pipe_info

read to 0xffff888106d1be90 of 4 bytes by task 2008 on cpu 1:
 pipe_lock_nested fs/pipe.c:64 [inline]
 pipe_lock fs/pipe.c:73 [inline]
 pipe_wait+0xd7/0x140 fs/pipe.c:121
 splice_from_pipe_next.part.0+0x89/0x1d0 fs/splice.c:576
 splice_from_pipe_next fs/splice.c:555 [inline]
 __splice_from_pipe+0xb8/0x4a0 fs/splice.c:634
 splice_from_pipe+0xbb/0x100 fs/splice.c:671
 generic_splice_sendpage+0x45/0x60 fs/splice.c:844
 do_splice_from fs/splice.c:863 [inline]
 do_splice+0x6db/0xc40 fs/splice.c:1170
 __do_sys_splice fs/splice.c:1447 [inline]
 __se_sys_splice fs/splice.c:1427 [inline]
 __x64_sys_splice+0x20a/0x220 fs/splice.c:1427
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff888106d1be90 of 4 bytes by task 2006 on cpu 0:
 put_pipe_info+0x4d/0xb0 fs/pipe.c:665
 pipe_release+0x115/0x170 fs/pipe.c:693
 __fput+0x1e1/0x520 fs/file_table.c:280
 ____fput+0x1f/0x30 fs/file_table.c:313
 task_work_run+0xf6/0x130 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x2b4/0x2c0 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2006 Comm: syz-executor.2 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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