Re: [PATCH] modsign: use all trusted keys to verify module signature

[Jessica Yu]

+++ Ke Wu [22/10/18 15:26 -0700]:
> Make mod_verify_sig to use all trusted keys. This allows keys in
> secondary_trusted_keys to be used to verify PKCS#7 signature on a
> kernel module.
>
> Signed-off-by: Ke Wu <mikewu@xxxxxxxxxx>
> ---
> kernel/module_signing.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/module_signing.c b/kernel/module_signing.c
> index f2075ce8e4b3..a8b923ba1a39 100644
> --- a/kernel/module_signing.c
> +++ b/kernel/module_signing.c
> @@ -83,6 +83,6 @@ int mod_verify_sig(const void *mod, struct load_info *info)
> 	}
>
> 	return verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
> -				      NULL, VERIFYING_MODULE_SIGNATURE,
> +				      (void *)1UL, VERIFYING_MODULE_SIGNATURE,
> 				      NULL, NULL);
> }

I've just stumbled on commit 817aef260037f ("Replace magic for trusting
the secondary keyring with #define"), so we should probably use
VERIFY_USE_SECONDARY_KEYRING in place of (void *)1UL.

Thanks,

Jessica