btrfs: fix null pointer dereference in btrfs_show_devname when name is null

[linux-beck.git] / fs / btrfs / super.c

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 0927e463afcacc4ded41630bb6f44d103a3e7311..8e16bca69c56de7fa54c1680698b60d7319a03a9 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1811,6 +1811,8 @@ static int btrfs_show_devname(struct seq_file *m, struct dentry *root)
                list_for_each_entry(dev, head, dev_list) {
                        if (dev->missing)
                                continue;
+                       if (!dev->name)
+                               continue;
                        if (!first_dev || dev->devid < first_dev->devid)
                                first_dev = dev;
                }