mm/memunmap: don't access uninitialized memmap in memunmap_pages()

[linux-2.6-block.git] / fs / tracefs / inode.c

diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
index eeeae0475da9d0cc15b5b6fe363fd77404e481b9..0caa151cae4ee101d13cd218b695b98787b730ad 100644 (file)
--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -16,6 +16,7 @@
 #include <linux/namei.h>
 #include <linux/tracefs.h>
 #include <linux/fsnotify.h>
+#include <linux/security.h>
 #include <linux/seq_file.h>
 #include <linux/parser.h>
 #include <linux/magic.h>
@@ -390,6 +391,9 @@ struct dentry *tracefs_create_file(const char *name, umode_t mode,
        struct dentry *dentry;
        struct inode *inode;
 
+       if (security_locked_down(LOCKDOWN_TRACEFS))
+               return NULL;
+
        if (!(mode & S_IFMT))
                mode |= S_IFREG;
        BUG_ON(!S_ISREG(mode));