diff --git a/Documentation/ABI/testing/sysfs-module b/Documentation/ABI/testing/sysfs-module
index 47064c2b1f79b3cc4e1039323b7b43e9278735be..b9a29cdbaccbbeafad3e71ca7e319f87780cf644 100644
--- a/Documentation/ABI/testing/sysfs-module
+++ b/Documentation/ABI/testing/sysfs-module
@@ -49,3 +49,4 @@ Description: Module taint flags:
O - out-of-tree module
F - force-loaded module
C - staging driver module
+ X - unsigned module
diff --git a/Documentation/module-signing.txt b/Documentation/module-signing.txt
index 2b40e04d3c49323e7f3a5bd044836dcd0fbbedb9..b6af42e4d79039666a2c882fecfb0243f7d0b7b9 100644
--- a/Documentation/module-signing.txt
+++ b/Documentation/module-signing.txt
@@ -53,7 +53,8 @@ This has a number of options available:
If this is off (ie. "permissive"), then modules for which the key is not
available and modules that are unsigned are permitted, but the kernel will
- be marked as being tainted.
+ be marked as being tainted, and the concerned modules will be marked as
+ tainted, shown with the character 'X'.
If this is on (ie. "restrictive"), only modules that have a valid
signature that can be verified by a public key in the kernel's possession
diff --git a/Documentation/oops-tracing.txt b/Documentation/oops-tracing.txt
index 13032c0140d430b3bc15a5e4a5771eecfc208f4e..879abe289523e61b79b14814c3499ed793eabdee 100644
--- a/Documentation/oops-tracing.txt
+++ b/Documentation/oops-tracing.txt
@@ -265,6 +265,9 @@ characters, each representing a particular tainted value.
13: 'O' if an externally-built ("out-of-tree") module has been loaded.
+ 14: 'X' if an unsigned module has been loaded in a kernel supporting
+ module signature.
+
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 e55124e7c40cd0eef8afb92c34913cd68c42faac..8ebe1c047004337dee5f83bb8fde5e776760c549 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -792,6 +792,8 @@ can be ORed together:
1024 - A module from drivers/staging was loaded.
2048 - The system is working around a severe firmware bug.
4096 - An out-of-tree module has been loaded.
+8192 - An unsigned module has been loaded in a kernel supporting module
+ signature.
==============================================================
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 196d1ea86df081a5224928b4d75117aec85cd822..471090093c67e3f6be3e2cccc3bea498e7a71c19 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -469,6 +469,7 @@ extern enum system_states {
#define TAINT_CRAP 10
#define TAINT_FIRMWARE_WORKAROUND 11
#define TAINT_OOT_MODULE 12
+#define TAINT_UNSIGNED_MODULE 13
extern const char hex_asc[];
#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
diff --git a/include/trace/events/module.h b/include/trace/events/module.h
index 1619327374164909b6f8aaea6a730b0821ec6ee2..11fd51b413de25a6a2415c1724dee458d3314ddc 100644
--- a/include/trace/events/module.h
+++ b/include/trace/events/module.h
@@ -22,8 +22,10 @@ struct module;
#define show_module_flags(flags) __print_flags(flags, "", \
{ (1UL << TAINT_PROPRIETARY_MODULE), "P" }, \
+ { (1UL << TAINT_OOT_MODULE), "O" }, \
{ (1UL << TAINT_FORCED_MODULE), "F" }, \
- { (1UL << TAINT_CRAP), "C" })
+ { (1UL << TAINT_CRAP), "C" }, \
+ { (1UL << TAINT_UNSIGNED_MODULE), "X" })
TRACE_EVENT(module_load,
diff --git a/kernel/module.c b/kernel/module.c
index efa1e60319507a90f6d0447d9ecd8f28aab64e68..c1acb0c5b6373e431ba96eae82e2b4e0ae4935d5 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1013,6 +1013,8 @@ static size_t module_flags_taint(struct module *mod, char *buf)
buf[l++] = 'F';
if (mod->taints & (1 << TAINT_CRAP))
buf[l++] = 'C';
+ if (mod->taints & (1 << TAINT_UNSIGNED_MODULE))
+ buf[l++] = 'X';
/*
* TAINT_FORCED_RMMOD: could be added.
* TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
@@ -3214,7 +3216,7 @@ static int load_module(struct load_info *info, const char __user *uargs,
pr_notice_once("%s: module verification failed: signature "
"and/or required key missing - tainting "
"kernel\n", mod->name);
- add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_STILL_OK);
+ add_taint_module(mod, TAINT_UNSIGNED_MODULE, LOCKDEP_STILL_OK);
}
#endif
diff --git a/kernel/panic.c b/kernel/panic.c
index 6d6300375090e7b2345353174d85ed09f6f35ce4..0e25fe10871eb6453fdb78a3ee98d6d9371a7a8e 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -210,6 +210,7 @@ static const struct tnt tnts[] = {
{ TAINT_CRAP, 'C', ' ' },
{ TAINT_FIRMWARE_WORKAROUND, 'I', ' ' },
{ TAINT_OOT_MODULE, 'O', ' ' },
+ { TAINT_UNSIGNED_MODULE, 'X', ' ' },
};
/**
@@ -228,6 +229,7 @@ static const struct tnt tnts[] = {
* 'C' - modules from drivers/staging are loaded.
* 'I' - Working around severe firmware bug.
* 'O' - Out-of-tree module has been loaded.
+ * 'X' - Unsigned module has been loaded.
*
* The string is overwritten by the next call to print_tainted().
*/
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 031cc5655a514d2bcf89f930388dcddda396986f..3cdbed1fbdc79805aa5630687bde189fbde1d723 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -633,7 +633,8 @@ EXPORT_SYMBOL_GPL(tracepoint_iter_reset);
#ifdef CONFIG_MODULES
bool trace_module_has_bad_taint(struct module *mod)
{
- return mod->taints & ~((1 << TAINT_OOT_MODULE) | (1 << TAINT_CRAP));
+ return mod->taints & ~((1 << TAINT_OOT_MODULE) | (1 << TAINT_CRAP) |
+ (1 << TAINT_UNSIGNED_MODULE));
}
static int tracepoint_module_coming(struct module *mod)
@@ -644,7 +645,7 @@ static int tracepoint_module_coming(struct module *mod)
/*
* We skip modules that taint the kernel, especially those with different
* module headers (for forced load), to make sure we don't cause a crash.
- * Staging and out-of-tree GPL modules are fine.
+ * Staging, out-of-tree, and unsigned GPL modules are fine.
*/
if (trace_module_has_bad_taint(mod))
return 0;