Re: [PATCH/RFC] Futex mmap_sem deadlock

[Chris Friesen]

Jamie Lokier wrote:

In futex.c:

        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;

Chris
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