LU-4863 lloop: avoid panic during blockdev_info

[fs/lustre-release.git] / lustre / llite / lloop.c

diff --git a/lustre/llite/lloop.c b/lustre/llite/lloop.c
index cef0de6..90bf646 100644 (file)
--- a/lustre/llite/lloop.c
+++ b/lustre/llite/lloop.c
@@ -645,7 +645,10 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
         case LL_IOC_LLOOP_INFO: {
                 struct lu_fid fid;
 
-                LASSERT(lo->lo_backing_file != NULL);
+               if (lo->lo_backing_file == NULL) {
+                       err = -ENOENT;
+                       break;
+               }
                 if (inode == NULL)
                         inode = lo->lo_backing_file->f_dentry->d_inode;
                 if (lo->lo_state == LLOOP_BOUND)