4 files changed, 17 insertions, 2 deletions

diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index e1ff0d920a5c..bde799e06598 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -369,4 +369,5 @@ can be ORed together:
   2 - A module was force loaded by insmod -f.
       Set by modutils >= 2.4.9 and module-init-tools.
   4 - Unsafe SMP processors: SMP with CPUs not designed for SMP.
+ 64 - A module from drivers/staging was loaded.
 
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2651f805ba6d..b36805cb95fb 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -260,6 +260,7 @@ extern enum system_states {
 #define TAINT_DIE                       (1<<7)
 #define TAINT_OVERRIDDEN_ACPI_TABLE     (1<<8)
 #define TAINT_WARN                      (1<<9)
+#define TAINT_CRAP                      (1<<10)
 
 extern void dump_stack(void) __cold;
 
diff --git a/kernel/module.c b/kernel/module.c
index 9db11911e04b..152b1655bbac 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1806,6 +1806,7 @@ static noinline struct module *load_module(void __user *umod,
         Elf_Ehdr *hdr;
         Elf_Shdr *sechdrs;
         char *secstrings, *args, *modmagic, *strtab = NULL;
+        char *staging;
         unsigned int i;
         unsigned int symindex = 0;
         unsigned int strindex = 0;
@@ -1960,6 +1961,14 @@ static noinline struct module *load_module(void __user *umod,
                 goto free_hdr;
         }
 
+        staging = get_modinfo(sechdrs, infoindex, "staging");
+        if (staging) {
+                add_taint_module(mod, TAINT_CRAP);
+                printk(KERN_WARNING "%s: module is from the staging directory,"
+                       " the quality is unknown, you have been warned.\n",
+                       mod->name);
+        }
+
         /* Now copy in args */
         args = strndup_user(uargs, ~0UL >> 1);
         if (IS_ERR(args)) {
@@ -2556,6 +2565,8 @@ static char *module_flags(struct module *mod, char *buf)
                         buf[bx++] = 'P';
                 if (mod->taints & TAINT_FORCED_MODULE)
                         buf[bx++] = 'F';
+                if (mod->taints & TAINT_CRAP)
+                        buf[bx++] = 'C';
                 /*
                  * TAINT_FORCED_RMMOD: could be added.
                  * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
diff --git a/kernel/panic.c b/kernel/panic.c
index 12c5a0a6c89b..98e2047f4db7 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -155,6 +155,7 @@ EXPORT_SYMBOL(panic);
  *  'U' - Userspace-defined naughtiness.
  *  'A' - ACPI table overridden.
  *  'W' - Taint on warning.
+ *  'C' - modules from drivers/staging are loaded.
  *
  *      The string is overwritten by the next call to print_taint().
  */
@@ -163,7 +164,7 @@ const char *print_tainted(void)
 {
         static char buf[20];
         if (tainted) {
-                snprintf(buf, sizeof(buf), "Tainted: %c%c%c%c%c%c%c%c%c%c",
+                snprintf(buf, sizeof(buf), "Tainted: %c%c%c%c%c%c%c%c%c%c%c",
                         tainted & TAINT_PROPRIETARY_MODULE ? 'P' : 'G',
                         tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
                         tainted & TAINT_UNSAFE_SMP ? 'S' : ' ',
@@ -173,7 +174,8 @@ const char *print_tainted(void)
                         tainted & TAINT_USER ? 'U' : ' ',
                         tainted & TAINT_DIE ? 'D' : ' ',
                         tainted & TAINT_OVERRIDDEN_ACPI_TABLE ? 'A' : ' ',
-                        tainted & TAINT_WARN ? 'W' : ' ');
+                        tainted & TAINT_WARN ? 'W' : ' ',
+                        tainted & TAINT_CRAP ? 'C' : ' ');
         }
         else
                 snprintf(buf, sizeof(buf), "Not tainted");