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kern/44285: tmpfs rename leaks directory

>Number:         44285
>Category:       kern
>Synopsis:       tmpfs rename leaks directory
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 28 01:40:00 +0000 2010
>Originator:     YAMAMOTO Takashi
>Release:        NetBSD current
        tmpfs_rename() leaks the directory overwritten by the rename.
        run /usr/tests/fs/vfs/t_renamerace and find ENOSPC.
        decrement the link count as tmpfs_rmdir does.


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