diff options
| author | Matthew Garrett <mjg59@srcf.ucam.org> | 2019-08-19 17:17:49 -0700 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2019-08-19 21:54:16 -0700 |
| commit | 95f5e95f41dff31b2a4566c5a8975c08a49ae4e3 (patch) | |
| tree | 1d11399a1d98cf0cf2b338f45567781559034e12 /include | |
| parent | 96c4f67293e4cd8b3394adce5a8041a2784e68a3 (diff) | |
x86/msr: Restrict MSR access when the kernel is locked down
Writing to MSRs should not be allowed if the kernel is locked down, since
it could lead to execution of arbitrary code in kernel mode. Based on a
patch by Kees Cook.
Signed-off-by: Matthew Garrett <mjg59@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
cc: x86@kernel.org
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/security.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h index cd93fa5d3c6d..010637a79eac 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -109,6 +109,7 @@ enum lockdown_reason { LOCKDOWN_HIBERNATION, LOCKDOWN_PCI_ACCESS, LOCKDOWN_IOPORT, + LOCKDOWN_MSR, LOCKDOWN_INTEGRITY_MAX, LOCKDOWN_CONFIDENTIALITY_MAX, }; |