syzbot

==================================================================
BUG: KCSAN: data-race in pipe_lock / pipe_release

read-write to 0xffff88812b37872c of 4 bytes by task 5204 on cpu 0:
 put_pipe_info fs/pipe.c:713 [inline]
 pipe_release+0x15e/0x1c0 fs/pipe.c:743
 __fput+0x2ac/0x640 fs/file_table.c:450
 __fput_sync+0x96/0xc0 fs/file_table.c:536
 __do_sys_close fs/open.c:1579 [inline]
 __se_sys_close+0x109/0x1b0 fs/open.c:1564
 __x64_sys_close+0x1f/0x30 fs/open.c:1564
 x64_sys_call+0x266c/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88812b37872c of 4 bytes by task 5203 on cpu 1:
 pipe_lock+0x17/0x50 fs/pipe.c:91
 ipipe_prep fs/splice.c:1659 [inline]
 splice_pipe_to_pipe fs/splice.c:1734 [inline]
 do_splice+0x200/0x1100 fs/splice.c:1331
 __do_splice fs/splice.c:1436 [inline]
 __do_sys_splice fs/splice.c:1639 [inline]
 __se_sys_splice+0x259/0x3a0 fs/splice.c:1621
 __x64_sys_splice+0x78/0x90 fs/splice.c:1621
 x64_sys_call+0x2ce8/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:276
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000002 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 5203 Comm: syz.2.613 Not tainted 6.13.0-syzkaller-05474-g113691ce9f32 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
==================================================================