linux-kernel - Re: [PATCH v2] certs: Fix wrong kconfig option used for x509_revocation

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Date:   Thu, 4 Mar 2021 11:10:49 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Eric Snowberg <eric.snowberg@...cle.com>
Cc:     rdunlap@...radead.org, dhowells@...hat.com, jarkko@...nel.org,
        dwmw2@...radead.org, keyrings@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] certs: Fix wrong kconfig option used for
 x509_revocation_list

On Thu, Mar 04, 2021 at 12:50:30PM -0500, Eric Snowberg wrote:
> Fix a build issue when x509_revocation_list is not defined.
> 
> $ make ARCH=x86_64 O=build64 all
> 
>  EXTRACT_CERTS   ../
> At main.c:154:
> - SSL error:0909006C:PEM routines:get_name:no start line: crypto/pem/pem_lib.c:745
> extract-cert: ../: Is a directory
> make[2]: [../certs/Makefile:119: certs/x509_revocation_list] Error 1 (ignored)
> 
> When the new CONFIG_SYSTEM_REVOCATION_LIST was added [1], it was not carried
> into the code for preloading the revocation certificates [2].  Change from
> using the original CONFIG_SYSTEM_BLACKLIST_KEYRING  to the new
> CONFIG_SYSTEM_REVOCATION_LIST.
> 
> [1] https://lore.kernel.org/keyrings/EDA280F9-F72D-4181-93C7-CDBE95976FF7@oracle.com/T/#m562c1b27bf402190e7bb573ad20eff5b6310d08f
> [2] https://lore.kernel.org/keyrings/EDA280F9-F72D-4181-93C7-CDBE95976FF7@oracle.com/T/#m07e258bf019ccbac23820fad5192ceffa74fc6ab
> 
> Reported-by: Randy Dunlap <rdunlap@...radead.org>
> Signed-off-by: Eric Snowberg <eric.snowberg@...cle.com>

This seems to fix my build errors.

Tested-by: Nathan Chancellor <nathan@...nel.org>

> ---
> v2 changes:
>   Use the new config option for extract-cert
>   Use the new config option when building revocation_certificates.o
> ---
>  certs/Makefile    | 5 +++--
>  certs/blacklist.c | 4 ++++
>  scripts/Makefile  | 2 +-
>  3 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/certs/Makefile b/certs/Makefile
> index e3f4926fd21e..b6db52ebf0be 100644
> --- a/certs/Makefile
> +++ b/certs/Makefile
> @@ -4,7 +4,8 @@
>  #
>  
>  obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o common.o
> -obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o revocation_certificates.o common.o
> +obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o common.o
> +obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o
>  ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),"")
>  obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o
>  else
> @@ -105,7 +106,7 @@ $(obj)/signing_key.x509: scripts/extract-cert $(X509_DEP) FORCE
>  	$(call if_changed,extract_certs,$(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY))
>  endif # CONFIG_MODULE_SIG
>  
> -ifeq ($(CONFIG_SYSTEM_BLACKLIST_KEYRING),y)
> +ifeq ($(CONFIG_SYSTEM_REVOCATION_LIST),y)
>  
>  $(eval $(call config_filename,SYSTEM_REVOCATION_KEYS))
>  
> diff --git a/certs/blacklist.c b/certs/blacklist.c
> index 723b19c96256..c9a435b15af4 100644
> --- a/certs/blacklist.c
> +++ b/certs/blacklist.c
> @@ -21,8 +21,10 @@
>  
>  static struct key *blacklist_keyring;
>  
> +#ifdef CONFIG_SYSTEM_REVOCATION_LIST
>  extern __initconst const u8 revocation_certificate_list[];
>  extern __initconst const unsigned long revocation_certificate_list_size;
> +#endif
>  
>  /*
>   * The description must be a type prefix, a colon and then an even number of
> @@ -225,6 +227,7 @@ static int __init blacklist_init(void)
>   */
>  device_initcall(blacklist_init);
>  
> +#ifdef CONFIG_SYSTEM_REVOCATION_LIST
>  /*
>   * Load the compiled-in list of revocation X.509 certificates.
>   */
> @@ -237,3 +240,4 @@ static __init int load_revocation_certificate_list(void)
>  				     blacklist_keyring);
>  }
>  late_initcall(load_revocation_certificate_list);
> +#endif
> diff --git a/scripts/Makefile b/scripts/Makefile
> index 983b785f13cb..bd0718f7c493 100644
> --- a/scripts/Makefile
> +++ b/scripts/Makefile
> @@ -11,7 +11,7 @@ hostprogs-always-$(CONFIG_ASN1)				+= asn1_compiler
>  hostprogs-always-$(CONFIG_MODULE_SIG_FORMAT)		+= sign-file
>  hostprogs-always-$(CONFIG_SYSTEM_TRUSTED_KEYRING)	+= extract-cert
>  hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE)	+= insert-sys-cert
> - hostprogs-always-$(CONFIG_SYSTEM_BLACKLIST_KEYRING)	+= extract-cert
> +hostprogs-always-$(CONFIG_SYSTEM_REVOCATION_LIST)	+= extract-cert
>  
>  HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include
>  HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include
> -- 
> 2.18.4
>