linux-kernel - Re: [PATCH] security/keys: Remove inconsistent _

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Message-ID: <Yxl447f+lYtKjyJb@kernel.org>
Date:   Thu, 8 Sep 2022 08:08:51 +0300
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Vincenzo Frascino <vincenzo.frascino@....com>
Cc:     linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>,
        Paul Moore <paul@...l-moore.com>,
        James Morris <jmorris@...ei.org>
Subject: Re: [PATCH] security/keys: Remove inconsistent __user annotation

On Wed, Sep 07, 2022 at 01:12:30PM +0100, Vincenzo Frascino wrote:
> The declaration of keyring_read does not match the definition
> (security/keys/keyring.c). In this case the definition is correct
> because it matches what defined in "struct key_type::read"
> (linux/key-type.h).
> 
> Fix the declaration removing the inconsistent __user annotation.
> 
> Cc: David Howells <dhowells@...hat.com>
> Cc: Jarkko Sakkinen <jarkko@...nel.org>
> Cc: Paul Moore <paul@...l-moore.com>
> Cc: James Morris <jmorris@...ei.org>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>
> ---
> Note: This issue was discovered during the porting of the linux kernel
> on Morello [1].
> 
> [1] https://git.morello-project.org/morello/kernel/linux
> 
>  security/keys/keyring.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/security/keys/keyring.c b/security/keys/keyring.c
> index 5e6a90760753..4448758f643a 100644
> --- a/security/keys/keyring.c
> +++ b/security/keys/keyring.c
> @@ -79,7 +79,7 @@ static void keyring_revoke(struct key *keyring);
>  static void keyring_destroy(struct key *keyring);
>  static void keyring_describe(const struct key *keyring, struct seq_file *m);
>  static long keyring_read(const struct key *keyring,
> -			 char __user *buffer, size_t buflen);
> +			 char *buffer, size_t buflen);
>  
>  struct key_type key_type_keyring = {
>  	.name		= "keyring",
> -- 
> 2.37.3
> 

Acked-by: Jarkko Sakkinen <jarkko@...nel.org>

BR, Jarkko