syzbot

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BUG: KCSAN: data-race in pipe_lock / pipe_release

read-write to 0xffff888117dbf7ec of 4 bytes by task 7894 on cpu 0:
 put_pipe_info fs/pipe.c:712 [inline]
 pipe_release+0x164/0x1c0 fs/pipe.c:742
 __fput+0x2c2/0x660 fs/file_table.c:422
 __fput_sync+0x44/0x60 fs/file_table.c:507
 __do_sys_close fs/open.c:1555 [inline]
 __se_sys_close+0x101/0x1b0 fs/open.c:1540
 __x64_sys_close+0x1f/0x30 fs/open.c:1540
 x64_sys_call+0x25f1/0x2d70 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 0xffff888117dbf7ec of 4 bytes by task 7893 on cpu 1:
 pipe_lock+0x17/0x50 fs/pipe.c:91
 ipipe_prep fs/splice.c:1677 [inline]
 splice_pipe_to_pipe fs/splice.c:1752 [inline]
 do_splice+0x200/0x1120 fs/splice.c:1331
 __do_splice fs/splice.c:1436 [inline]
 __do_sys_splice fs/splice.c:1652 [inline]
 __se_sys_splice+0x24c/0x390 fs/splice.c:1634
 __x64_sys_splice+0x78/0x90 fs/splice.c:1634
 x64_sys_call+0x297f/0x2d70 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 PID: 7893 Comm: syz-executor.3 Not tainted 6.10.0-rc2-syzkaller-00361-g061d1af7b030 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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