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| author | Nayna Jain <nayna@linux.ibm.com> | 2021-04-22 21:16:02 -0400 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2021-04-26 21:54:23 -0400 |
| commit | 781a5739489949fd0f32432a9da17f7ddbccf1cc (patch) | |
| tree | 79006c017249d34638a753e423b902e1c1affa04 | |
| parent | 28073eb09c5aa29e879490edb88cfd3e7073821e (diff) | |
| download | lwn-781a5739489949fd0f32432a9da17f7ddbccf1cc.tar.gz lwn-781a5739489949fd0f32432a9da17f7ddbccf1cc.zip | |
ima: ensure IMA_APPRAISE_MODSIG has necessary dependencies
IMA_APPRAISE_MODSIG is used for verifying the integrity of both kernel
and modules. Enabling IMA_APPRAISE_MODSIG without MODULES causes a build
break.
Ensure the build time kernel signing key is only generated if both
IMA_APPRAISE_MODSIG and MODULES are enabled.
Fixes: 0165f4ca223b ("ima: enable signing of modules with build time generated key")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
| -rw-r--r-- | certs/Kconfig | 2 | ||||
| -rw-r--r-- | certs/Makefile | 2 | ||||
| -rw-r--r-- | certs/system_certificates.S | 3 |
3 files changed, 5 insertions, 2 deletions
diff --git a/certs/Kconfig b/certs/Kconfig index 48675ad319db..e4d00348fd73 100644 --- a/certs/Kconfig +++ b/certs/Kconfig @@ -4,7 +4,7 @@ menu "Certificates for signature checking" config MODULE_SIG_KEY string "File name or PKCS#11 URI of module signing key" default "certs/signing_key.pem" - depends on MODULE_SIG || IMA_APPRAISE_MODSIG + depends on MODULE_SIG || (IMA_APPRAISE_MODSIG && MODULES) help Provide the file name of a private key/certificate in PEM format, or a PKCS#11 URI according to RFC7512. The file should contain, or diff --git a/certs/Makefile b/certs/Makefile index e3185c57fbd8..2f369d6aa494 100644 --- a/certs/Makefile +++ b/certs/Makefile @@ -36,8 +36,10 @@ ifeq ($(CONFIG_MODULE_SIG),y) endif ifeq ($(CONFIG_IMA_APPRAISE_MODSIG),y) +ifeq ($(CONFIG_MODULES),y) SIGN_KEY = y endif +endif ifdef SIGN_KEY ############################################################################### diff --git a/certs/system_certificates.S b/certs/system_certificates.S index dcad27ea8527..e1645e6f4d97 100644 --- a/certs/system_certificates.S +++ b/certs/system_certificates.S @@ -9,7 +9,8 @@ system_certificate_list: __cert_list_start: __module_cert_start: -#if defined(CONFIG_MODULE_SIG) || defined(CONFIG_IMA_APPRAISE_MODSIG) +#if defined(CONFIG_MODULE_SIG) || (defined(CONFIG_IMA_APPRAISE_MODSIG) \ + && defined(CONFIG_MODULES)) .incbin "certs/signing_key.x509" #endif __module_cert_end: |