5 files changed, 24 insertions, 11 deletions

diff --git a/kernel/cred.c b/kernel/cred.c
index d7f7a01082eb..dd76cfe5f5b0 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -782,6 +782,25 @@ EXPORT_SYMBOL(set_create_files_as);
 
 #ifdef CONFIG_DEBUG_CREDENTIALS
 
+bool creds_are_invalid(const struct cred *cred)
+{
+        if (cred->magic != CRED_MAGIC)
+                return true;
+        if (atomic_read(&cred->usage) < atomic_read(&cred->subscribers))
+                return true;
+#ifdef CONFIG_SECURITY_SELINUX
+        if (selinux_is_enabled()) {
+                if ((unsigned long) cred->security < PAGE_SIZE)
+                        return true;
+                if ((*(u32 *)cred->security & 0xffffff00) ==
+                    (POISON_FREE << 24 | POISON_FREE << 16 | POISON_FREE << 8))
+                        return true;
+        }
+#endif
+        return false;
+}
+EXPORT_SYMBOL(creds_are_invalid);
+
 /*
  * dump invalid credentials
  */
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 689d20f39305..9fcb53a11f87 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -143,7 +143,6 @@ struct subprocess_info {
 static int ____call_usermodehelper(void *data)
 {
         struct subprocess_info *sub_info = data;
-        enum umh_wait wait = sub_info->wait;
         int retval;
 
         BUG_ON(atomic_read(&sub_info->cred->usage) != 1);
@@ -185,14 +184,10 @@ static int ____call_usermodehelper(void *data)
          */
         set_user_nice(current, 0);
 
-        if (wait == UMH_WAIT_EXEC)
-                complete(sub_info->complete);
-
         retval = kernel_execve(sub_info->path, sub_info->argv, sub_info->envp);
 
         /* Exec failed? */
-        if (wait != UMH_WAIT_EXEC)
-                sub_info->retval = retval;
+        sub_info->retval = retval;
         do_exit(0);
 }
 
@@ -271,14 +266,16 @@ static void __call_usermodehelper(struct work_struct *work)
 
         switch (wait) {
         case UMH_NO_WAIT:
-        case UMH_WAIT_EXEC:
                 break;
 
         case UMH_WAIT_PROC:
                 if (pid > 0)
                         break;
                 sub_info->retval = pid;
-                break;
+                /* FALLTHROUGH */
+
+        case UMH_WAIT_EXEC:
+                complete(sub_info->complete);
         }
 }
 
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 8ba052c86d48..b101cdc4df3f 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -13,7 +13,6 @@
 
 #include <linux/module.h>
 #include <linux/file.h>
-#include <linux/utsname.h>
 #include <linux/delay.h>
 #include <linux/bitops.h>
 #include <linux/genhd.h>
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 0dfaa47d7cb6..7f4f57bea4ce 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -26,7 +26,6 @@
 #include <linux/proc_fs.h>
 #include <linux/security.h>
 #include <linux/ctype.h>
-#include <linux/utsname.h>
 #include <linux/kmemcheck.h>
 #include <linux/smp_lock.h>
 #include <linux/fs.h>
diff --git a/kernel/uid16.c b/kernel/uid16.c
index 0314501688b9..419209893d87 100644
--- a/kernel/uid16.c
+++ b/kernel/uid16.c
@@ -4,7 +4,6 @@
  */
 
 #include <linux/mm.h>
-#include <linux/utsname.h>
 #include <linux/mman.h>
 #include <linux/notifier.h>
 #include <linux/reboot.h>