For testing (or root-only) purposes, the new flag will serve to tag the
kernel taint accurately.
When adding a new feature support, patches need to be incrementally
applied and tested with temporal parameters. Currently, there is no flag
for this usage.
Suggested-by: H. Peter Anvin <h...@zytor.com>
Signed-off-by: Chang S. Bae <chang.seok....@intel.com>
Cc: Andy Lutomirski <l...@kernel.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Andi Kleen <a...@linux.intel.com>
---
Documentation/sysctl/kernel.txt | 1 +
include/linux/kernel.h | 3 ++-
kernel/panic.c | 1 +
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 379063e58326..fb4244515314 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -1064,6 +1064,7 @@ ORed together. The letters are seen in "Tainted" line of
Oops reports.
32768 (K): The kernel has been live patched.
65536 (X): Auxiliary taint, defined and used by for distros.
131072 (T): The kernel was built with the struct randomization plugin.
+262144 (Z): The kernel is running in a known insecure configuration.
==============================================================
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 8f0e68e250a7..dc149ff8cc52 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -599,7 +599,8 @@ extern enum system_states {
#define TAINT_LIVEPATCH 15
#define TAINT_AUX 16
#define TAINT_RANDSTRUCT 17
-#define TAINT_FLAGS_COUNT 18
+#define TAINT_INSECURE 18
+#define TAINT_FLAGS_COUNT 19
struct taint_flag {
char c_true; /* character printed when tainted */
diff --git a/kernel/panic.c b/kernel/panic.c
index f121e6ba7e11..cb6b90538375 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -362,6 +362,7 @@ const struct taint_flag taint_flags[TAINT_FLAGS_COUNT] = {
[ TAINT_LIVEPATCH ] = { 'K', ' ', true },
[ TAINT_AUX ] = { 'X', ' ', true },
[ TAINT_RANDSTRUCT ] = { 'T', ' ', true },
+ [ TAINT_INSECURE ] = { 'Z', ' ', false },
};
/**
--
2.19.1
