1 files changed, 9 insertions, 4 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b437d3bdf95e..1bf37d15b174 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -172,6 +172,7 @@ static int run_delalloc_nocow(struct inode *inode, u64 start, u64 end)
         u64 loops = 0;
         u64 total_fs_bytes;
         struct btrfs_root *root = BTRFS_I(inode)->root;
+        struct btrfs_block_group_cache *block_group;
         struct extent_buffer *leaf;
         int found_type;
         struct btrfs_path *path;
@@ -230,16 +231,20 @@ again:
                 if (bytenr == 0)
                         goto not_found;
 
+                if (btrfs_count_snapshots_in_path(root, path, inode->i_ino,
+                                                  bytenr) != 1) {
+                        goto not_found;
+                }
+
                 /*
                  * we may be called by the resizer, make sure we're inside
                  * the limits of the FS
                  */
-                if (bytenr + extent_num_bytes > total_fs_bytes)
+                block_group = btrfs_lookup_block_group(root->fs_info,
+                                                       bytenr);
+                if (!block_group || block_group->ro)
                         goto not_found;
 
-                if (btrfs_count_snapshots_in_path(root, path, bytenr) != 1) {
-                        goto not_found;
-                }
 
                 start = extent_end;
         } else {