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    SubjectRe: [PATCH] KEYS: The request_key() syscall should link an existing key to the dest keyring
    Vegard Nossum <> wrote:

    > 1. Is it correct to return -EINPROGRESS in this case?

    Yes - it prevents construct_key_and_link() from going on to call
    construct_key(). The key in question is returned in *_key.

    However, I don't think I handle other errors coming back from
    construct_alloc_key() correctly.

    > 2. (Why) Shouldn't the return value of __key_link() be checked?

    It should. In fact, I should probably precheck and preallocate the keyring to
    make sure I don't get errors after allocating the new key.

    > 3. In __key_link(), shouldn't rcu_dereference() be used when accessing
    > keyring->payload.subscriptions?

    No. We have to hold a write lock on the keyring semaphore if we're going to
    call __key_link() to add something to it.

    We should, however, call rcu_dereference_protected().

    You should find a patch for this in your inbox.


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      Last update: 2010-04-28 17:01    [W:0.041 / U:10.096 seconds]
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