Re: [PATCH/RFC] Futex mmap_sem deadlock

[Jamie Lokier]

Chris Friesen wrote:
> >     down_read(&current->mm->mmap_sem);
> >     get_futex_key(...) etc.
> >     queue_me(...) etc.
> >     current->flags |= PF_MMAP_SEM;             <- new
> >     ret = get_user(...);
> >     current->flags &= PF_MMAP_SEM;             <- new
> >     /* the rest */
> 
> Should the second new line be this (with the inverse)?
> 
>       current->flags &= ~PF_MMAP_SEM;

Quiet!  I was trying to sneak in a security hole! :)

-- Jamie
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