syzbot

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BUG: KCSAN: data-race in pipe_lock / pipe_release

write to 0xffff888122585aec of 4 bytes by task 14901 on cpu 1:
 put_pipe_info fs/pipe.c:703 [inline]
 pipe_release+0x186/0x1e0 fs/pipe.c:733
 __fput+0x295/0x520 fs/file_table.c:317
 ____fput+0x11/0x20 fs/file_table.c:350
 task_work_run+0x8e/0x110 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x160/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888122585aec of 4 bytes by task 14902 on cpu 0:
 pipe_lock_nested fs/pipe.c:81 [inline]
 pipe_lock+0x13/0x40 fs/pipe.c:90
 splice_file_to_pipe+0x2a/0x360 fs/splice.c:1015
 do_splice+0xc53/0xde0 fs/splice.c:1104
 __do_splice fs/splice.c:1144 [inline]
 __do_sys_splice fs/splice.c:1350 [inline]
 __se_sys_splice+0x2bd/0x3a0 fs/splice.c:1332
 __x64_sys_splice+0x74/0x80 fs/splice.c:1332
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000002 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14902 Comm: syz-executor.1 Not tainted 5.17.0-rc5-syzkaller-00189-g53ab78cd6d5a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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