This converts the taint bit defines to an enum, uses indexed initializers
instead of comments, and make sure that no one forgets to update the
taint_flags when adding new bits.
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
include/linux/kernel.h | 40 ++++++++++++++++++++++------------------
kernel/panic.c | 36 +++++++++++++++++++-----------------
2 files changed, 41 insertions(+), 35 deletions(-)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index ce51455e2adf..0d2a2dd507b7 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -533,24 +533,28 @@ extern enum system_states {
SYSTEM_RESTART,
} system_state;
-#define TAINT_PROPRIETARY_MODULE 0
-#define TAINT_FORCED_MODULE 1
-#define TAINT_CPU_OUT_OF_SPEC 2
-#define TAINT_FORCED_RMMOD 3
-#define TAINT_MACHINE_CHECK 4
-#define TAINT_BAD_PAGE 5
-#define TAINT_USER 6
-#define TAINT_DIE 7
-#define TAINT_OVERRIDDEN_ACPI_TABLE 8
-#define TAINT_WARN 9
-#define TAINT_CRAP 10
-#define TAINT_FIRMWARE_WORKAROUND 11
-#define TAINT_OOT_MODULE 12
-#define TAINT_UNSIGNED_MODULE 13
-#define TAINT_SOFTLOCKUP 14
-#define TAINT_LIVEPATCH 15
-#define TAINT_AUX 16
-#define TAINT_FLAGS_COUNT 17
+enum taint_enum {
+ TAINT_PROPRIETARY_MODULE = 0,
+ TAINT_FORCED_MODULE,
+ TAINT_CPU_OUT_OF_SPEC,
+ TAINT_FORCED_RMMOD,
+ TAINT_MACHINE_CHECK,
+ TAINT_BAD_PAGE,
+ TAINT_USER,
+ TAINT_DIE,
+ TAINT_OVERRIDDEN_ACPI_TABLE,
+ TAINT_WARN,
+ TAINT_CRAP,
+ TAINT_FIRMWARE_WORKAROUND,
+ TAINT_OOT_MODULE,
+ TAINT_UNSIGNED_MODULE,
+ TAINT_SOFTLOCKUP,
+ TAINT_LIVEPATCH,
+ TAINT_AUX,
+
+ /* End of taint bits */
+ TAINT_FLAGS_COUNT
+};
struct taint_flag {
char c_true; /* character printed when tainted */
diff --git a/kernel/panic.c b/kernel/panic.c
index 2cfef408fec9..c5e0fd5a188e 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -308,23 +308,23 @@ EXPORT_SYMBOL(panic);
* is being removed anyway.
*/
const struct taint_flag taint_flags[TAINT_FLAGS_COUNT] = {
- { 'P', 'G', true }, /* TAINT_PROPRIETARY_MODULE */
- { 'F', ' ', true }, /* TAINT_FORCED_MODULE */
- { 'S', ' ', false }, /* TAINT_CPU_OUT_OF_SPEC */
- { 'R', ' ', false }, /* TAINT_FORCED_RMMOD */
- { 'M', ' ', false }, /* TAINT_MACHINE_CHECK */
- { 'B', ' ', false }, /* TAINT_BAD_PAGE */
- { 'U', ' ', false }, /* TAINT_USER */
- { 'D', ' ', false }, /* TAINT_DIE */
- { 'A', ' ', false }, /* TAINT_OVERRIDDEN_ACPI_TABLE */
- { 'W', ' ', false }, /* TAINT_WARN */
- { 'C', ' ', true }, /* TAINT_CRAP */
- { 'I', ' ', false }, /* TAINT_FIRMWARE_WORKAROUND */
- { 'O', ' ', true }, /* TAINT_OOT_MODULE */
- { 'E', ' ', true }, /* TAINT_UNSIGNED_MODULE */
- { 'L', ' ', false }, /* TAINT_SOFTLOCKUP */
- { 'K', ' ', true }, /* TAINT_LIVEPATCH */
- { 'X', ' ', true }, /* TAINT_AUX */
+ [ TAINT_PROPRIETARY_MODULE ] = { 'P', 'G', true },
+ [ TAINT_FORCED_MODULE ] = { 'F', ' ', true },
+ [ TAINT_CPU_OUT_OF_SPEC ] = { 'S', ' ', false },
+ [ TAINT_FORCED_RMMOD ] = { 'R', ' ', false },
+ [ TAINT_MACHINE_CHECK ] = { 'M', ' ', false },
+ [ TAINT_BAD_PAGE ] = { 'B', ' ', false },
+ [ TAINT_USER ] = { 'U', ' ', false },
+ [ TAINT_DIE ] = { 'D', ' ', false },
+ [ TAINT_OVERRIDDEN_ACPI_TABLE ] = { 'A', ' ', false },
+ [ TAINT_WARN ] = { 'W', ' ', false },
+ [ TAINT_CRAP ] = { 'C', ' ', true },
+ [ TAINT_FIRMWARE_WORKAROUND ] = { 'I', ' ', false },
+ [ TAINT_OOT_MODULE ] = { 'O', ' ', true },
+ [ TAINT_UNSIGNED_MODULE ] = { 'E', ' ', true },
+ [ TAINT_SOFTLOCKUP ] = { 'L', ' ', false },
+ [ TAINT_LIVEPATCH ] = { 'K', ' ', true },
+ [ TAINT_AUX ] = { 'X', ' ', true },
};
/**
@@ -354,6 +354,8 @@ const char *print_tainted(void)
{
static char buf[TAINT_FLAGS_COUNT + sizeof("Tainted: ")];
+ BUILD_BUG_ON(ARRAY_SIZE(taint_flags) != TAINT_FLAGS_COUNT);
+
if (tainted_mask) {
char *s;
int i;
--
2.7.4
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