do_last(): fetch directory ->i_mode and ->i_uid before it's too late
may_create_in_sticky() call is done when we already have dropped the reference to dir. Fixes: 30aba665 (namei: allow restricted O_CREAT of FIFOs and regular files) Signed-off-by:Al Viro <viro@zeniv.linux.org.uk>
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508c8772