linux-kernel - Re: security/keys: add CONFIG_KEYS

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Date:   Wed, 29 Mar 2017 12:20:02 -0700
From:   Eric Biggers <ebiggers3@...il.com>
To:     Bilal Amarni <bilal.amarni@...il.com>
Cc:     dhowells@...hat.com, arnd@...db.de, james.l.morris@...cle.com,
        serge@...lyn.com, keyrings@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-security-module@...r.kernel.org
Subject: Re: security/keys: add CONFIG_KEYS_COMPAT to Kconfig

On Thu,  9 Feb 2017 22:11:38 +0100, Bilal Amarni wrote:
> CONFIG_KEYS_COMPAT is defined in arch-specific Kconfigs and is missing for
> several 64-bit architectures : arm64, mips, parisc, tile.
> 
> At the moment and for those architectures, calling in 32-bit userspace the
> keyctl syscall would return an ENOSYS error.
> 
> This patch moves the CONFIG_KEYS_COMPAT option to security/keys/Kconfig, to
> make sure the compatibility wrapper is registered by default for any 64-bit
> architecture as long as it is configured with CONFIG_COMPAT.

David, where can I find the git branch this patch was applied to?  I don't see
it anywhere in security-keys or linux-security.

I recently added KEYS_COMPAT to arm64 (5c2a625937ba); that should be reverted
after this patch.

Also, I'd like to submit a follow-on patch that removes KEYS_COMPAT and simply
uses COMPAT.

And the parisc architecture doesn't use compat_sys_keyctl() in its compat
syscall table, so that should be fixed too (though that's not a new bug).

- Eric