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SubjectQ: a bogus set_fs(USER_DS) in setup_frame/setup_rt_frame ?
I am really puzzled by set_fs(USER_DS) in setup_frame/setup_rt_frame.

How is it possible that current->addr_limit != USER_DS ? If this _is_
possible, how can can we trust the result of access_ok() above?

Thanks in advance,

Oleg.

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