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| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2017-04-21 18:58:27 -0400 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2017-06-21 14:37:12 -0400 |
| commit | 503ceaef8e2e7dbbdb04a867acc6fe4c548ede7f (patch) | |
| tree | 8657ab63e5546d352bdc1c4ffaa420d75b701d94 /Documentation/admin-guide/kernel-parameters.txt | |
| parent | 33ce9549cfa1e71d77bc91a2e67e65d693e2e53f (diff) | |
| download | lwn-503ceaef8e2e7dbbdb04a867acc6fe4c548ede7f.tar.gz lwn-503ceaef8e2e7dbbdb04a867acc6fe4c548ede7f.zip | |
ima: define a set of appraisal rules requiring file signatures
The builtin "ima_appraise_tcb" policy should require file signatures for
at least a few of the hooks (eg. kernel modules, firmware, and the kexec
kernel image), but changing it would break the existing userspace/kernel
ABI.
This patch defines a new builtin policy named "secure_boot", which
can be specified on the "ima_policy=" boot command line, independently
or in conjunction with the "ima_appraise_tcb" policy, by specifing
ima_policy="appraise_tcb | secure_boot". The new appraisal rules
requiring file signatures will be added prior to the "ima_appraise_tcb"
rules.
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Changelog:
- Reference secure boot in the new builtin policy name. (Thiago Bauermann)
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 9b4381fee877..e438a1fca554 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1478,7 +1478,7 @@ ima_policy= [IMA] The builtin policies to load during IMA setup. - Format: "tcb | appraise_tcb" + Format: "tcb | appraise_tcb | secure_boot" The "tcb" policy measures all programs exec'd, files mmap'd for exec, and all files opened with the read @@ -1489,6 +1489,10 @@ all files owned by root. (This is the equivalent of ima_appraise_tcb.) + The "secure_boot" policy appraises the integrity + of files (eg. kexec kernel image, kernel modules, + firmware, policy, etc) based on file signatures. + ima_tcb [IMA] Deprecated. Use ima_policy= instead. Load a policy which meets the needs of the Trusted Computing Base. This means IMA will measure all |