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

[linux-2.6-block.git] / fs / super.c

diff --git a/fs/super.c b/fs/super.c
index f627b7c53d2b7fefda7546daac7efac40f1a765f..cfadab2cbf35fdfd67139e6c341840308adb93b9 100644 (file)
--- a/fs/super.c
+++ b/fs/super.c
@@ -1300,6 +1300,7 @@ int get_tree_bdev(struct fs_context *fc,
        mutex_lock(&bdev->bd_fsfreeze_mutex);
        if (bdev->bd_fsfreeze_count > 0) {
                mutex_unlock(&bdev->bd_fsfreeze_mutex);
+               blkdev_put(bdev, mode);
                warnf(fc, "%pg: Can't mount, blockdev is frozen", bdev);
                return -EBUSY;
        }
@@ -1308,8 +1309,10 @@ int get_tree_bdev(struct fs_context *fc,
        fc->sget_key = bdev;
        s = sget_fc(fc, test_bdev_super_fc, set_bdev_super_fc);
        mutex_unlock(&bdev->bd_fsfreeze_mutex);
-       if (IS_ERR(s))
+       if (IS_ERR(s)) {
+               blkdev_put(bdev, mode);
                return PTR_ERR(s);
+       }
 
        if (s->s_root) {
                /* Don't summarily change the RO/RW state. */