syzbot

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BUG: KCSAN: data-race in pipe_lock / pipe_release

read-write to 0xffff88813a849a2c of 4 bytes by task 10278 on cpu 1:
 put_pipe_info fs/pipe.c:706 [inline]
 pipe_release+0x164/0x1c0 fs/pipe.c:736
 __fput+0x2fd/0x5f0 fs/file_table.c:384
 ____fput+0x15/0x20 fs/file_table.c:412
 task_work_run+0x135/0x1a0 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd6/0xe0 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88813a849a2c of 4 bytes by task 10277 on cpu 0:
 pipe_lock_nested fs/pipe.c:81 [inline]
 pipe_lock+0x17/0x40 fs/pipe.c:90
 splice_file_to_pipe+0x30/0x3c0 fs/splice.c:1230
 do_splice+0xc5b/0x1100 fs/splice.c:1313
 __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:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000002 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10277 Comm: syz-executor.3 Tainted: G        W          6.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
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