| Message ID | 9f8b71f368843568d7dd6764f8c8a68b1f3a9bbc.1644953683.git.msuchanek@suse.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/4] Fix arm64 kexec forbidding kernels signed with keys in the secondary keyring to boot | expand |
On Tue, Feb 15, 2022 at 08:39:40PM +0100, Michal Suchanek wrote: > 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: Philipp Rudo <prudo@linux.ibm.com> > Cc: kexec@lists.infradead.org > Cc: keyrings@vger.kernel.org > Cc: linux-security-module@vger.kernel.org > Cc: stable@kernel.org > Signed-off-by: Michal Suchanek <msuchanek@suse.de> Reviewed-by: "Lee, Chun-Yi" <jlee@suse.com> > --- > arch/s390/kernel/machine_kexec_file.c | 18 +++++++++++++----- > 1 file 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 */ > > -- > 2.31.1
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 */
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: Philipp Rudo <prudo@linux.ibm.com> Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Cc: stable@kernel.org Signed-off-by: Michal Suchanek <msuchanek@suse.de> --- arch/s390/kernel/machine_kexec_file.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-)