path: root/include/linux/security.h
diff options
authorMatthew Garrett <matthewgarrett@google.com>2019-08-19 17:18:01 -0700
committerJames Morris <jmorris@namei.org>2019-08-19 21:54:16 -0700
commit29d3c1c8dfe752c01b7115ecd5a3142b232a38e1 (patch)
tree9a42db9e64c08db645dcf9689344d4f718b4d518 /include/linux/security.h
parentlockdown: Lock down perf when in confidentiality mode (diff)
kexec: Allow kexec_file() with appropriate IMA policy when locked down
Systems in lockdown mode should block the kexec of untrusted kernels. For x86 and ARM we can ensure that a kernel is trustworthy by validating a PE signature, but this isn't possible on other architectures. On those platforms we can use IMA digital signatures instead. Add a function to determine whether IMA has or will verify signatures for a given event type, and if so permit kexec_file() even if the kernel is otherwise locked down. This is restricted to cases where CONFIG_INTEGRITY_TRUSTED_KEYRING is set in order to prevent an attacker from loading additional keys at runtime. Signed-off-by: Matthew Garrett <mjg59@google.com> Acked-by: Mimi Zohar <zohar@linux.ibm.com> Cc: Dmitry Kasatkin <dmitry.kasatkin@gmail.com> Cc: linux-integrity@vger.kernel.org Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'include/linux/security.h')
0 files changed, 0 insertions, 0 deletions