syzbot

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BUG: KCSAN: data-race in pipe_lock / pipe_release

read-write to 0xffff88814627a66c of 4 bytes by task 13853 on cpu 1:
 put_pipe_info fs/pipe.c:715 [inline]
 pipe_release+0x164/0x1c0 fs/pipe.c:745
 __fput+0x299/0x630 fs/file_table.c:394
 __fput_sync+0x44/0x50 fs/file_table.c:475
 __do_sys_close fs/open.c:1587 [inline]
 __se_sys_close+0xfa/0x1a0 fs/open.c:1572
 __x64_sys_close+0x1f/0x30 fs/open.c:1572
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88814627a66c of 4 bytes by task 13957 on cpu 0:
 pipe_lock_nested fs/pipe.c:81 [inline]
 pipe_lock+0x17/0x40 fs/pipe.c:90
 splice_to_socket+0x7e/0x9c0 fs/splice.c:801
 do_splice_from fs/splice.c:933 [inline]
 do_splice+0x99d/0x10a0 fs/splice.c:1292
 __do_splice fs/splice.c:1370 [inline]
 __do_sys_splice fs/splice.c:1586 [inline]
 __se_sys_splice+0x24c/0x380 fs/splice.c:1568
 __x64_sys_splice+0x78/0x90 fs/splice.c:1568
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x00000002 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 13957 Comm: syz-executor.4 Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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