linux-kernel - Re: [PATCH] KEYS: add missing permission check for request

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Message-ID: <7849.1511863981@warthog.procyon.org.uk>
Date:   Tue, 28 Nov 2017 10:13:01 +0000
From:   David Howells <dhowells@...hat.com>
To:     Eric Biggers <ebiggers3@...il.com>
Cc:     dhowells@...hat.com, keyrings@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, Eric Biggers <ebiggers@...gle.com>,
        stable@...r.kernel.org
Subject: Re: [PATCH] KEYS: add missing permission check for request_key() destination

Eric Biggers <ebiggers3@...il.com> wrote:

> +		if (do_perm_check) {
> +			ret = key_permission(make_key_ref(dest_keyring, 1),
> +					     KEY_NEED_WRITE);

dest_keyring may be NULL at this point as alloc_uid() doesn't automatically
create keyrings.

David