hugetlbfs: fix memory leak for resv_map

[tomoyo/tomoyo-test1.git] / fs / hugetlbfs / inode.c

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index ec32fec..9285dd4 100644 (file)
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -755,11 +755,17 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb,
                                        umode_t mode, dev_t dev)
 {
        struct inode *inode;
-       struct resv_map *resv_map;
+       struct resv_map *resv_map = NULL;
 
-       resv_map = resv_map_alloc();
-       if (!resv_map)
-               return NULL;
+       /*
+        * Reserve maps are only needed for inodes that can have associated
+        * page allocations.
+        */
+       if (S_ISREG(mode) || S_ISLNK(mode)) {
+               resv_map = resv_map_alloc();
+               if (!resv_map)
+                       return NULL;
+       }
 
        inode = new_inode(sb);
        if (inode) {
@@ -794,8 +800,10 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb,
                        break;
                }
                lockdep_annotate_inode_mutex_key(inode);
-       } else
-               kref_put(&resv_map->refs, resv_map_release);
+       } else {
+               if (resv_map)
+                       kref_put(&resv_map->refs, resv_map_release);
+       }
 
        return inode;
 }