Add a TAINT_KPATCH flag to be set whenever a kpatch patch module
successfully replaces a function.
Signed-off-by: Josh Poimboeuf <jpoim...@redhat.com>
Cc: Seth Jennings <sjenn...@redhat.com>
---
Documentation/oops-tracing.txt | 3 +++
Documentation/sysctl/kernel.txt | 1 +
include/linux/kernel.h | 1 +
kernel/panic.c | 2 ++
4 files changed, 7 insertions(+)
diff --git a/Documentation/oops-tracing.txt b/Documentation/oops-tracing.txt
index e315599..2ed7ed1 100644
--- a/Documentation/oops-tracing.txt
+++ b/Documentation/oops-tracing.txt
@@ -268,6 +268,9 @@ characters, each representing a particular tainted value.
14: 'E' if an unsigned module has been loaded in a kernel supporting
module signature.
+ 15: 'H' if a kpatch hot patch module has replaced any functions in the
+ running kernel.
+
The primary reason for the 'Tainted: ' string is to tell kernel
debuggers if this is a clean kernel or if anything unusual has
occurred. Tainting is permanent: even if an offending module is
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 9886c3d..7d31b1e 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -788,6 +788,7 @@ can be ORed together:
4096 - An out-of-tree module has been loaded.
8192 - An unsigned module has been loaded in a kernel supporting module
signature.
+16384 - A kpatch module has replaced a function in the running kernel.
==============================================================
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4c52907..cdfbe73 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -470,6 +470,7 @@ extern enum system_states {
#define TAINT_FIRMWARE_WORKAROUND 11
#define TAINT_OOT_MODULE 12
#define TAINT_UNSIGNED_MODULE 13
+#define TAINT_KPATCH 14
extern const char hex_asc[];
#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
diff --git a/kernel/panic.c b/kernel/panic.c
index d02fa9f..2c04a88 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -212,6 +212,7 @@ static const struct tnt tnts[] = {
{ TAINT_FIRMWARE_WORKAROUND, 'I', ' ' },
{ TAINT_OOT_MODULE, 'O', ' ' },
{ TAINT_UNSIGNED_MODULE, 'E', ' ' },
+ { TAINT_KPATCH, 'H', ' ' },
};
/**
@@ -231,6 +232,7 @@ static const struct tnt tnts[] = {
* 'I' - Working around severe firmware bug.
* 'O' - Out-of-tree module has been loaded.
* 'E' - Unsigned module has been loaded.
+ * 'H' - kpatch replaced a function.
*
* The string is overwritten by the next call to print_tainted().
*/
--
1.9.0
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