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| author |   Michal Suchanek <msuchanek@suse.de> | 2022-07-14 21:40:27 +0800 |
|---|---|---|
| committer |   Mimi Zohar <zohar@linux.ibm.com> | 2022-07-15 12:21:16 -0400 |
| commit | 0828c4a39be57768b8788e8cbd0d84683ea757e5 (patch) | |
| tree | 4df1671788f5ace5cffe50430d5d482acca90cc0 /arch/s390/kernel | |
| parent | arm64: kexec_file: use more system keyrings to verify kernel image signature (diff) | |
| download | linux-dev-0828c4a39be57768b8788e8cbd0d84683ea757e5.tar.xz linux-dev-0828c4a39be57768b8788e8cbd0d84683ea757e5.zip | |
kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification
commit e23a8020ce4e ("s390/kexec_file: Signature verification prototype")
adds support for KEXEC_SIG verification with keys from platform keyring
but the built-in keys and secondary keyring are not used.
Add support for the built-in keys and secondary keyring as x86 does.
Fixes: e23a8020ce4e ("s390/kexec_file: Signature verification prototype")
Cc: stable@vger.kernel.org
Cc: Philipp Rudo <prudo@linux.ibm.com>
Cc: kexec@lists.infradead.org
Cc: keyrings@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: "Lee, Chun-Yi" <jlee@suse.com>
Acked-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/machine_kexec_file.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/arch/s390/kernel/machine_kexec_file.c b/arch/s390/kernel/machine_kexec_file.c index 8f43575a4dd3..fc6d5f58debe 100644 --- a/arch/s390/kernel/machine_kexec_file.c +++ b/arch/s390/kernel/machine_kexec_file.c @@ -31,6 +31,7 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) const unsigned long marker_len = sizeof(MODULE_SIG_STRING) - 1; struct module_signature *ms; unsigned long sig_len; + int ret; /* Skip signature verification when not secure IPLed. */ if (!ipl_secure_flag) @@ -65,11 +66,18 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) return -EBADMSG; } - return verify_pkcs7_signature(kernel, kernel_len, - kernel + kernel_len, sig_len, - VERIFY_USE_PLATFORM_KEYRING, - VERIFYING_MODULE_SIGNATURE, - NULL, NULL); + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_SECONDARY_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_PLATFORM_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + return ret; } #endif /* CONFIG_KEXEC_SIG */ |