Ingo Molnar wrote:
basically, ->futex_offset is not blindly trusted by the kernel either:
it's simply used to calculate a "userspace pointer" value, which it then
uses in a (secure) get_user() access, to do a FUTEX_WAKEUP. [Note that
FUTEX_WAKEUP is already done at do_exit() time via the ->clear_child_tid
userspace pointer.] All in one: this is totally safe.
As mentioned by Paul...how do you deal with 32/64 compatibility where
your pointers are different sizes?
Chris
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