On 6/17/20 11:04 AM, Brian Masney wrote: > On Tue, Jun 16, 2020 at 11:47:20PM -0000, GitLab Bridge on behalf of prarit > wrote: >> From: Prarit Bhargava <[email protected]> >> >> kernsec.org recommends using SHA512 [1] for kernel module signing. There >> isn't any reason not to do this and the benefit is a stronger module >> hash. >> >> [1] >> https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project/Recommended_Settings >> >> Signed-off-by: Prarit Bhargava <[email protected]> >> --- >> redhat/configs/ark/generic/CONFIG_CRYPTO_SHA512 | 2 +- >> redhat/configs/ark/generic/s390x/zfcpdump/CONFIG_CRYPTO_SHA512 | 1 - >> redhat/configs/common/generic/CONFIG_IMA_DEFAULT_HASH_SHA512 | 1 + >> redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA256 | 2 +- >> redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA512 | 2 +- >> redhat/configs/fedora/generic/CONFIG_CRYPTO_SHA512 | 1 - >> 6 files changed, 4 insertions(+), 5 deletions(-) >> delete mode 100644 >> redhat/configs/ark/generic/s390x/zfcpdump/CONFIG_CRYPTO_SHA512 >> create mode 100644 >> redhat/configs/common/generic/CONFIG_IMA_DEFAULT_HASH_SHA512 >> delete mode 100644 redhat/configs/fedora/generic/CONFIG_CRYPTO_SHA512 > > Does arch/s390/configs/debug_defconfig need to be updated as well to > remove CONFIG_MODULE_SIG_SHA256? Based on my interpretation of the > definition of MODULE_SIG_HASH in init/Kconfig, it looks like SHA256 > will still be used for that kernel.
Hey bmasney, The arch/s390/configs/debug_defconfig file is from upstream and is not used in our config generation. We use the config files under redhat/configs (see priority.fedora, priority.rhel, and the 'make dist-configs' target). FWIW, after my change for Fedora: [prarit@prarit redhat]$ egrep MODULE_SIG_SHA256 configs/*.config configs/kernel-5.8.0-aarch64.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-aarch64-debug.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-ppc64le.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-ppc64le-debug.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-s390x.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-s390x-debug.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-x86_64.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-x86_64-debug.config:# CONFIG_MODULE_SIG_SHA256 is not set [prarit@prarit redhat]$ egrep MODULE_SIG_SHA512 configs/*.config configs/kernel-5.8.0-aarch64.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-aarch64-debug.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-ppc64le.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-ppc64le-debug.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-s390x.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-s390x-debug.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-x86_64.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-x86_64-debug.config:CONFIG_MODULE_SIG_SHA512=y and for RHEL: [prarit@prarit redhat]$ egrep MODULE_SIG_SHA256 configs/*.config configs/kernel-5.8.0-aarch64.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-aarch64-debug.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-ppc64le.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-ppc64le-debug.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-s390x.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-s390x-debug.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-x86_64.config:# CONFIG_MODULE_SIG_SHA256 is not set configs/kernel-5.8.0-x86_64-debug.config:# CONFIG_MODULE_SIG_SHA256 is not set [prarit@prarit redhat]$ egrep MODULE_SIG_SHA512 configs/*.config configs/kernel-5.8.0-aarch64.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-aarch64-debug.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-ppc64le.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-ppc64le-debug.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-s390x.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-s390x-debug.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-x86_64.config:CONFIG_MODULE_SIG_SHA512=y configs/kernel-5.8.0-x86_64-debug.config:CONFIG_MODULE_SIG_SHA512=y P. > > Brian > > >> >> diff --git a/redhat/configs/ark/generic/CONFIG_CRYPTO_SHA512 >> b/redhat/configs/ark/generic/CONFIG_CRYPTO_SHA512 >> index 29ce3726bd4a..5c25197e538b 100644 >> --- a/redhat/configs/ark/generic/CONFIG_CRYPTO_SHA512 >> +++ b/redhat/configs/ark/generic/CONFIG_CRYPTO_SHA512 >> @@ -1 +1 @@ >> -CONFIG_CRYPTO_SHA512=m >> +CONFIG_CRYPTO_SHA512=y >> diff --git a/redhat/configs/ark/generic/s390x/zfcpdump/CONFIG_CRYPTO_SHA512 >> b/redhat/configs/ark/generic/s390x/zfcpdump/CONFIG_CRYPTO_SHA512 >> deleted file mode 100644 >> index 5c25197e538b..000000000000 >> --- a/redhat/configs/ark/generic/s390x/zfcpdump/CONFIG_CRYPTO_SHA512 >> +++ /dev/null >> @@ -1 +0,0 @@ >> -CONFIG_CRYPTO_SHA512=y >> diff --git a/redhat/configs/common/generic/CONFIG_IMA_DEFAULT_HASH_SHA512 >> b/redhat/configs/common/generic/CONFIG_IMA_DEFAULT_HASH_SHA512 >> new file mode 100644 >> index 000000000000..63c78568591f >> --- /dev/null >> +++ b/redhat/configs/common/generic/CONFIG_IMA_DEFAULT_HASH_SHA512 >> @@ -0,0 +1 @@ >> +# CONFIG_IMA_DEFAULT_HASH_SHA512 is not set >> diff --git a/redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA256 >> b/redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA256 >> index b350aa05ab58..f54169c568b1 100644 >> --- a/redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA256 >> +++ b/redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA256 >> @@ -1 +1 @@ >> -CONFIG_MODULE_SIG_SHA256=y >> +# CONFIG_MODULE_SIG_SHA256 is not set >> diff --git a/redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA512 >> b/redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA512 >> index 2910d833029c..fe14d3f42285 100644 >> --- a/redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA512 >> +++ b/redhat/configs/common/generic/CONFIG_MODULE_SIG_SHA512 >> @@ -1 +1 @@ >> -# CONFIG_MODULE_SIG_SHA512 is not set >> +CONFIG_MODULE_SIG_SHA512=y >> diff --git a/redhat/configs/fedora/generic/CONFIG_CRYPTO_SHA512 >> b/redhat/configs/fedora/generic/CONFIG_CRYPTO_SHA512 >> deleted file mode 100644 >> index 5c25197e538b..000000000000 >> --- a/redhat/configs/fedora/generic/CONFIG_CRYPTO_SHA512 >> +++ /dev/null >> @@ -1 +0,0 @@ >> -CONFIG_CRYPTO_SHA512=y >> -- > > > _______________________________________________ kernel mailing list -- [email protected] To unsubscribe send an email to [email protected] Fedora Code of Conduct: 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