diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index acb3c5c3b025..58785dc7080a 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3938,6 +3938,7 @@ int extent_fiemap(struct btrfs_inode *inode, struct fiemap_extent_info *fieinfo,
 	lockend = round_up(start + len, root->fs_info->sectorsize);
 	prev_extent_end = lockstart;
 
+	btrfs_inode_lock(&inode->vfs_inode, BTRFS_ILOCK_SHARED);
 	lock_extent(&inode->io_tree, lockstart, lockend, &cached_state);
 
 	ret = fiemap_find_last_extent_offset(inode, path, &last_extent_end);
@@ -4129,6 +4130,7 @@ check_eof_delalloc:
 
 out_unlock:
 	unlock_extent(&inode->io_tree, lockstart, lockend, &cached_state);
+	btrfs_inode_unlock(&inode->vfs_inode, BTRFS_ILOCK_SHARED);
 out:
 	kfree(backref_cache);
 	btrfs_free_path(path);