[SRU Bionic] UBUNTU: [Config]: Set CONFIG_PPC_RTAS_FILTER

[Thadeu Lima de Souza Cascardo]

RTAS may be used to read arbritary memory, which we do not want to allow when
Secure Boot is used. It is restricted to only some allowed operations, which
are the ones that are used by distributed tools.

CVE-2020-27777
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at canonical.com>
---
 debian.master/config/annotations | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/debian.master/config/annotations b/debian.master/config/annotations
index 9d75dd744c4c..52fa132d2063 100644
--- a/debian.master/config/annotations
+++ b/debian.master/config/annotations
@@ -159,6 +159,9 @@ CONFIG_ISA                                      policy<{'i386': 'y'}>
 
 # Menu: Bus options (PCI etc.) >> Architecture: powerpc
 CONFIG_FSL_LBC                                  policy<{'ppc64el': 'y'}>
+CONFIG_PPC_RTAS_FILTER                          policy<{'ppc64el': 'y'}>
+#
+CONFIG_PPC_RTAS_FILTER                          mark<ENFORCED> note<CVE-2020-27777>
 
 # Menu: Bus options (PCI etc.) >> Architecture: s390
 CONFIG_QDIO                                     policy<{'s390x': 'm'}>
-- 
2.27.0