Re: [PATCH 2/4] certs: fix and refactor CONFIG_SYSTEM_BLACKLIST_HASH_LIST build

Jarkko Sakkinen
2022-06-15T18:51:07Z

On Mon, Jun 13, 2022 at 02:34:36PM +0200, Mickaël Salaün wrote:
>
>
> On 11/06/2022 19:22, Masahiro Yamada wrote:
> > Commit addf466389d9 ("certs: Check that builtin blacklist hashes are
> > valid") was applied 8 months after the submission.
> >
> > In the meantime, the base code had been removed by commit b8c96a6b466c
> > ("certs: simplify $(srctree)/ handling and remove config_filename
> > macro").
> >
> > Fix the Makefile.
> >
> > Create a local copy of $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST). It is
> > included from certs/blacklist_hashes.c and also works as a timestamp.
> >
> > Send error messages from check-blacklist-hashes.awk to stderr instead
> > of stdout.
> >
> > Fixes: addf466389d9 ("certs: Check that builtin blacklist hashes are valid")
> > Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
>
> Reviewed-by: Mickaël Salaün <mic@linux.microsoft.com>
>
> As a side note, it may let an orphan certs/blacklist_hashes_checked file but
> we can't really do something about that and it's OK.
>
> Thanks!
>
> > ---
> >
> > certs/.gitignore | 2 +-
> > certs/Makefile | 20 ++++++++++----------
> > certs/blacklist_hashes.c | 2 +-
> > 3 files changed, 12 insertions(+), 12 deletions(-)
> >
> > diff --git a/certs/.gitignore b/certs/.gitignore
> > index 56637aceaf81..cec5465f31c1 100644
> > --- a/certs/.gitignore
> > +++ b/certs/.gitignore
> > @@ -1,5 +1,5 @@
> > # SPDX-License-Identifier: GPL-2.0-only
> > -/blacklist_hashes_checked
> > +/blacklist_hash_list
> > /extract-cert
> > /x509_certificate_list
> > /x509_revocation_list
> > diff --git a/certs/Makefile b/certs/Makefile
> > index cb1a9da3fc58..a8d628fd5f7b 100644
> > --- a/certs/Makefile
> > +++ b/certs/Makefile
> > @@ -7,22 +7,22 @@ obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o c
> > obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o common.o
> > obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o
> > ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),)
> > -quiet_cmd_check_blacklist_hashes = CHECK $(patsubst "%",%,$(2))
> > - cmd_check_blacklist_hashes = $(AWK) -f $(srctree)/scripts/check-blacklist-hashes.awk $(2); touch $@
> > -$(eval $(call config_filename,SYSTEM_BLACKLIST_HASH_LIST))
> > +$(obj)/blacklist_hashes.o: $(obj)/blacklist_hash_list
> > +CFLAGS_blacklist_hashes.o := -I $(obj)
> > -$(obj)/blacklist_hashes.o: $(obj)/blacklist_hashes_checked
> > +quiet_cmd_check_and_copy_blacklist_hash_list = GEN $@
> > + cmd_check_and_copy_blacklist_hash_list = \
> > + $(AWK) -f $(srctree)/scripts/check-blacklist-hashes.awk $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) >&2; \
> > + cat $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) > $@
> > -CFLAGS_blacklist_hashes.o += -I$(srctree)
> > -
> > -targets += blacklist_hashes_checked
> > -$(obj)/blacklist_hashes_checked: $(SYSTEM_BLACKLIST_HASH_LIST_SRCPREFIX)$(SYSTEM_BLACKLIST_HASH_LIST_FILENAME) scripts/check-blacklist-hashes.awk FORCE
> > - $(call if_changed,check_blacklist_hashes,$(SYSTEM_BLACKLIST_HASH_LIST_SRCPREFIX)$(CONFIG_SYSTEM_BLACKLIST_HASH_LIST))
> > +$(obj)/blacklist_hash_list: $(CONFIG_SYSTEM_BLACKLIST_HASH_LIST) FORCE
> > + $(call if_changed,check_and_copy_blacklist_hash_list)
> > obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o
> > else
> > obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_nohashes.o
> > endif
> > +targets += blacklist_hash_list
> > quiet_cmd_extract_certs = CERT $@
> > cmd_extract_certs = $(obj)/extract-cert $(extract-cert-in) $@
> > @@ -33,7 +33,7 @@ $(obj)/system_certificates.o: $(obj)/x509_certificate_list
> > $(obj)/x509_certificate_list: $(CONFIG_SYSTEM_TRUSTED_KEYS) $(obj)/extract-cert FORCE
> > $(call if_changed,extract_certs)
> > -targets += x509_certificate_list blacklist_hashes_checked
> > +targets += x509_certificate_list
> > # If module signing is requested, say by allyesconfig, but a key has not been
> > # supplied, then one will need to be generated to make sure the build does not
> > diff --git a/certs/blacklist_hashes.c b/certs/blacklist_hashes.c
> > index d5961aa3d338..86d66fe11348 100644
> > --- a/certs/blacklist_hashes.c
> > +++ b/certs/blacklist_hashes.c
> > @@ -2,6 +2,6 @@
> > #include "blacklist.h"
> > const char __initconst *const blacklist_hashes[] = {
> > -#include CONFIG_SYSTEM_BLACKLIST_HASH_LIST
> > +#include "blacklist_hash_list"
> > , NULL
> > };

I'll make a PR for 1/4 and 2/4 so that they get into 5.19.

BR, Jarkko